X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/mediawiki.git/blobdiff_plain/036b27389fdc19af6784c101fb7e56319de98b4c..refs/heads/master:/includes/Title.php diff --git a/includes/Title.php b/includes/Title.php index 5ae2f1a0..a4dc8c1f 100644 --- a/includes/Title.php +++ b/includes/Title.php @@ -1,37 +1,44 @@ timestamp/false - var $mBacklinkCache = null; // /< Cache of links to this title + /** @var string Text form (spaces not underscores) of the main part */ + public $mTextform = ''; + + /** @var string URL-encoded form of the main part */ + public $mUrlform = ''; + + /** @var string Main part with underscores */ + public $mDbkeyform = ''; + + /** @var string Database key with the initial letter in the case specified by the user */ + protected $mUserCaseDBKey; + + /** @var int Namespace index, i.e. one of the NS_xxxx constants */ + public $mNamespace = NS_MAIN; + + /** @var string Interwiki prefix */ + public $mInterwiki = ''; + + /** @var bool Was this Title created from a string with a local interwiki prefix? */ + private $mLocalInterwiki = false; + + /** @var string Title fragment (i.e. the bit after the #) */ + public $mFragment = ''; + + /** @var int Article ID, fetched from the link cache on demand */ + public $mArticleID = -1; + + /** @var bool|int ID of most recent revision */ + protected $mLatestID = false; + + /** + * @var bool|string ID of the page's content model, i.e. one of the + * CONTENT_MODEL_XXX constants + */ + private $mContentModel = false; + + /** + * @var bool If a content model was forced via setContentModel() + * this will be true to avoid having other code paths reset it + */ + private $mForcedContentModel = false; + + /** @var int Estimated number of revisions; null of not loaded */ + private $mEstimateRevisions; + + /** @var array Array of groups allowed to edit this article */ + public $mRestrictions = []; + + /** @var string|bool */ + protected $mOldRestrictions = false; + + /** @var bool Cascade restrictions on this page to included templates and images? */ + public $mCascadeRestriction; + + /** Caching the results of getCascadeProtectionSources */ + public $mCascadingRestrictions; + + /** @var array When do the restrictions on this page expire? */ + protected $mRestrictionsExpiry = []; + + /** @var bool Are cascading restrictions in effect on this page? */ + protected $mHasCascadingRestrictions; + + /** @var array Where are the cascading restrictions coming from on this page? */ + public $mCascadeSources; + + /** @var bool Boolean for initialisation on demand */ + public $mRestrictionsLoaded = false; + + /** @var string Text form including namespace/interwiki, initialised on demand */ + protected $mPrefixedText = null; + + /** @var mixed Cached value for getTitleProtection (create protection) */ + public $mTitleProtection; + + /** + * @var int Namespace index when there is no namespace. Don't change the + * following default, NS_MAIN is hardcoded in several places. See T2696. + * Zero except in {{transclusion}} tags. + */ + public $mDefaultNamespace = NS_MAIN; + + /** @var int The page length, 0 for special pages */ + protected $mLength = -1; + + /** @var null Is the article at this title a redirect? */ + public $mRedirect = null; + + /** @var array Associative array of user ID -> timestamp/false */ + private $mNotificationTimestamp = []; + + /** @var bool Whether a page has any subpages */ + private $mHasSubpages; + + /** @var bool The (string) language code of the page's language and content code. */ + private $mPageLanguage = false; + + /** @var string|bool|null The page language code from the database, null if not saved in + * the database or false if not loaded, yet. */ + private $mDbPageLanguage = false; + + /** @var TitleValue A corresponding TitleValue object */ + private $mTitleValue = null; + + /** @var bool Would deleting this page be a big deletion? */ + private $mIsBigDeletion = null; // @} + /** + * B/C kludge: provide a TitleParser for use by Title. + * Ideally, Title would have no methods that need this. + * Avoid usage of this singleton by using TitleValue + * and the associated services when possible. + * + * @return TitleFormatter + */ + private static function getTitleFormatter() { + return MediaWikiServices::getInstance()->getTitleFormatter(); + } + + /** + * B/C kludge: provide an InterwikiLookup for use by Title. + * Ideally, Title would have no methods that need this. + * Avoid usage of this singleton by using TitleValue + * and the associated services when possible. + * + * @return InterwikiLookup + */ + private static function getInterwikiLookup() { + return MediaWikiServices::getInstance()->getInterwikiLookup(); + } /** - * Constructor - * @private + * @access protected */ - /* private */ function __construct() { } + function __construct() { + } /** * Create a new Title from a prefixed DB key * - * @param $key \type{\string} The database key, which has underscores + * @param string $key The database key, which has underscores * instead of spaces, possibly including namespace and * interwiki prefixes - * @return \type{Title} the new object, or NULL on an error + * @return Title|null Title, or null on an error */ public static function newFromDBkey( $key ) { $t = new Title(); $t->mDbkeyform = $key; - if ( $t->secureAndSplit() ) { + + try { + $t->secureAndSplit(); return $t; - } else { + } catch ( MalformedTitleException $ex ) { return null; } } + /** + * Create a new Title from a TitleValue + * + * @param TitleValue $titleValue Assumed to be safe. + * + * @return Title + */ + public static function newFromTitleValue( TitleValue $titleValue ) { + return self::newFromLinkTarget( $titleValue ); + } + + /** + * Create a new Title from a LinkTarget + * + * @param LinkTarget $linkTarget Assumed to be safe. + * + * @return Title + */ + public static function newFromLinkTarget( LinkTarget $linkTarget ) { + if ( $linkTarget instanceof Title ) { + // Special case if it's already a Title object + return $linkTarget; + } + return self::makeTitle( + $linkTarget->getNamespace(), + $linkTarget->getText(), + $linkTarget->getFragment(), + $linkTarget->getInterwiki() + ); + } + /** * Create a new Title from text, such as what one would find in a link. De- * codes any HTML entities in the text. * - * @param $text string The link text; spaces, prefixes, and an + * Title objects returned by this method are guaranteed to be valid, and + * thus return true from the isValid() method. + * + * @param string|int|null $text The link text; spaces, prefixes, and an * initial ':' indicating the main namespace are accepted. - * @param $defaultNamespace int The namespace to use if none is speci- - * fied by a prefix. If you want to force a specific namespace even if + * @param int $defaultNamespace The namespace to use if none is specified + * by a prefix. If you want to force a specific namespace even if * $text might begin with a namespace prefix, use makeTitle() or * makeTitleSafe(). - * @return Title The new object, or null on an error. + * @throws InvalidArgumentException + * @return Title|null Title or null on an error. */ public static function newFromText( $text, $defaultNamespace = NS_MAIN ) { + // DWIM: Integers can be passed in here when page titles are used as array keys. + if ( $text !== null && !is_string( $text ) && !is_int( $text ) ) { + throw new InvalidArgumentException( '$text must be a string.' ); + } + if ( $text === null ) { + return null; + } + + try { + return self::newFromTextThrow( strval( $text ), $defaultNamespace ); + } catch ( MalformedTitleException $ex ) { + return null; + } + } + + /** + * Like Title::newFromText(), but throws MalformedTitleException when the title is invalid, + * rather than returning null. + * + * The exception subclasses encode detailed information about why the title is invalid. + * + * Title objects returned by this method are guaranteed to be valid, and + * thus return true from the isValid() method. + * + * @see Title::newFromText + * + * @since 1.25 + * @param string $text Title text to check + * @param int $defaultNamespace + * @throws MalformedTitleException If the title is invalid + * @return Title + */ + public static function newFromTextThrow( $text, $defaultNamespace = NS_MAIN ) { if ( is_object( $text ) ) { - throw new MWException( 'Title::newFromText given an object' ); + throw new MWException( '$text must be a string, given an object' ); } - /** - * Wiki pages often contain multiple links to the same page. - * Title normalization and parsing can become expensive on - * pages with many links, so we can save a little time by - * caching them. - * - * In theory these are value objects and won't get changed... - */ - if ( $defaultNamespace == NS_MAIN && isset( Title::$titleCache[$text] ) ) { - return Title::$titleCache[$text]; + $titleCache = self::getTitleCache(); + + // Wiki pages often contain multiple links to the same page. + // Title normalization and parsing can become expensive on pages with many + // links, so we can save a little time by caching them. + // In theory these are value objects and won't get changed... + if ( $defaultNamespace == NS_MAIN ) { + $t = $titleCache->get( $text ); + if ( $t ) { + return $t; + } } - /** - * Convert things like é ā or 〗 into normalized (bug 14952) text - */ + // Convert things like é ā or 〗 into normalized (T16952) text $filteredText = Sanitizer::decodeCharReferencesAndNormalize( $text ); $t = new Title(); - $t->mDbkeyform = str_replace( ' ', '_', $filteredText ); - $t->mDefaultNamespace = $defaultNamespace; - - static $cachedcount = 0 ; - if ( $t->secureAndSplit() ) { - if ( $defaultNamespace == NS_MAIN ) { - if ( $cachedcount >= self::CACHE_MAX ) { - # Avoid memory leaks on mass operations... - Title::$titleCache = array(); - $cachedcount = 0; - } - $cachedcount++; - Title::$titleCache[$text] =& $t; - } - return $t; - } else { - $ret = null; - return $ret; + $t->mDbkeyform = strtr( $filteredText, ' ', '_' ); + $t->mDefaultNamespace = intval( $defaultNamespace ); + + $t->secureAndSplit(); + if ( $defaultNamespace == NS_MAIN ) { + $titleCache->set( $text, $t ); } + return $t; } /** @@ -177,40 +342,82 @@ class Title { * Create a new Title from URL-encoded text. Ensures that * the given title's length does not exceed the maximum. * - * @param $url \type{\string} the title, as might be taken from a URL - * @return \type{Title} the new object, or NULL on an error + * @param string $url The title, as might be taken from a URL + * @return Title|null The new object, or null on an error */ public static function newFromURL( $url ) { - global $wgLegalTitleChars; $t = new Title(); # For compatibility with old buggy URLs. "+" is usually not valid in titles, # but some URLs used it as a space replacement and they still come # from some external search tools. - if ( strpos( $wgLegalTitleChars, '+' ) === false ) { - $url = str_replace( '+', ' ', $url ); + if ( strpos( self::legalChars(), '+' ) === false ) { + $url = strtr( $url, '+', ' ' ); } - $t->mDbkeyform = str_replace( ' ', '_', $url ); - if ( $t->secureAndSplit() ) { + $t->mDbkeyform = strtr( $url, ' ', '_' ); + + try { + $t->secureAndSplit(); return $t; - } else { + } catch ( MalformedTitleException $ex ) { return null; } } + /** + * @return HashBagOStuff + */ + private static function getTitleCache() { + if ( self::$titleCache == null ) { + self::$titleCache = new HashBagOStuff( [ 'maxKeys' => self::CACHE_MAX ] ); + } + return self::$titleCache; + } + + /** + * Returns a list of fields that are to be selected for initializing Title + * objects or LinkCache entries. Uses $wgContentHandlerUseDB to determine + * whether to include page_content_model. + * + * @return array + */ + protected static function getSelectFields() { + global $wgContentHandlerUseDB, $wgPageLanguageUseDB; + + $fields = [ + 'page_namespace', 'page_title', 'page_id', + 'page_len', 'page_is_redirect', 'page_latest', + ]; + + if ( $wgContentHandlerUseDB ) { + $fields[] = 'page_content_model'; + } + + if ( $wgPageLanguageUseDB ) { + $fields[] = 'page_lang'; + } + + return $fields; + } + /** * Create a new Title from an article ID * - * @param $id \type{\int} the page_id corresponding to the Title to create - * @param $flags \type{\int} use Title::GAID_FOR_UPDATE to use master - * @return \type{Title} the new object, or NULL on an error + * @param int $id The page_id corresponding to the Title to create + * @param int $flags Use Title::GAID_FOR_UPDATE to use master + * @return Title|null The new object, or null on an error */ public static function newFromID( $id, $flags = 0 ) { - $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE ); - $row = $db->selectRow( 'page', '*', array( 'page_id' => $id ), __METHOD__ ); + $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_REPLICA ); + $row = $db->selectRow( + 'page', + self::getSelectFields(), + [ 'page_id' => $id ], + __METHOD__ + ); if ( $row !== false ) { - $title = Title::newFromRow( $row ); + $title = self::newFromRow( $row ); } else { $title = null; } @@ -220,28 +427,25 @@ class Title { /** * Make an array of titles from an array of IDs * - * @param $ids \type{\arrayof{\int}} Array of IDs - * @return \type{\arrayof{Title}} Array of Titles + * @param int[] $ids Array of IDs + * @return Title[] Array of Titles */ public static function newFromIDs( $ids ) { if ( !count( $ids ) ) { - return array(); + return []; } - $dbr = wfGetDB( DB_SLAVE ); - + $dbr = wfGetDB( DB_REPLICA ); + $res = $dbr->select( 'page', - array( - 'page_namespace', 'page_title', 'page_id', - 'page_len', 'page_is_redirect', 'page_latest', - ), - array( 'page_id' => $ids ), + self::getSelectFields(), + [ 'page_id' => $ids ], __METHOD__ ); - $titles = array(); + $titles = []; foreach ( $res as $row ) { - $titles[] = Title::newFromRow( $row ); + $titles[] = self::newFromRow( $row ); } return $titles; } @@ -249,42 +453,89 @@ class Title { /** * Make a Title object from a DB row * - * @param $row \type{Row} (needs at least page_title,page_namespace) - * @return \type{Title} corresponding Title + * @param stdClass $row Object database row (needs at least page_title,page_namespace) + * @return Title Corresponding Title */ public static function newFromRow( $row ) { $t = self::makeTitle( $row->page_namespace, $row->page_title ); - - $t->mArticleID = isset( $row->page_id ) ? intval( $row->page_id ) : -1; - $t->mLength = isset( $row->page_len ) ? intval( $row->page_len ) : -1; - $t->mRedirect = isset( $row->page_is_redirect ) ? (bool)$row->page_is_redirect : null; - $t->mLatestID = isset( $row->page_latest ) ? intval( $row->page_latest ) : false; - + $t->loadFromRow( $row ); return $t; } + /** + * Load Title object fields from a DB row. + * If false is given, the title will be treated as non-existing. + * + * @param stdClass|bool $row Database row + */ + public function loadFromRow( $row ) { + if ( $row ) { // page found + if ( isset( $row->page_id ) ) { + $this->mArticleID = (int)$row->page_id; + } + if ( isset( $row->page_len ) ) { + $this->mLength = (int)$row->page_len; + } + if ( isset( $row->page_is_redirect ) ) { + $this->mRedirect = (bool)$row->page_is_redirect; + } + if ( isset( $row->page_latest ) ) { + $this->mLatestID = (int)$row->page_latest; + } + if ( !$this->mForcedContentModel && isset( $row->page_content_model ) ) { + $this->mContentModel = strval( $row->page_content_model ); + } elseif ( !$this->mForcedContentModel ) { + $this->mContentModel = false; # initialized lazily in getContentModel() + } + if ( isset( $row->page_lang ) ) { + $this->mDbPageLanguage = (string)$row->page_lang; + } + if ( isset( $row->page_restrictions ) ) { + $this->mOldRestrictions = $row->page_restrictions; + } + } else { // page not found + $this->mArticleID = 0; + $this->mLength = 0; + $this->mRedirect = false; + $this->mLatestID = 0; + if ( !$this->mForcedContentModel ) { + $this->mContentModel = false; # initialized lazily in getContentModel() + } + } + } + /** * Create a new Title from a namespace index and a DB key. - * It's assumed that $ns and $title are *valid*, for instance when - * they came directly from the database or a special page name. - * For convenience, spaces are converted to underscores so that - * eg user_text fields can be used directly. - * - * @param $ns \type{\int} the namespace of the article - * @param $title \type{\string} the unprefixed database key form - * @param $fragment \type{\string} The link fragment (after the "#") - * @param $interwiki \type{\string} The interwiki prefix - * @return \type{Title} the new object - */ - public static function &makeTitle( $ns, $title, $fragment = '', $interwiki = '' ) { + * + * It's assumed that $ns and $title are safe, for instance when + * they came directly from the database or a special page name, + * not from user input. + * + * No validation is applied. For convenience, spaces are normalized + * to underscores, so that e.g. user_text fields can be used directly. + * + * @note This method may return Title objects that are "invalid" + * according to the isValid() method. This is usually caused by + * configuration changes: e.g. a namespace that was once defined is + * no longer configured, or a character that was once allowed in + * titles is now forbidden. + * + * @param int $ns The namespace of the article + * @param string $title The unprefixed database key form + * @param string $fragment The link fragment (after the "#") + * @param string $interwiki The interwiki prefix + * @return Title The new object + */ + public static function makeTitle( $ns, $title, $fragment = '', $interwiki = '' ) { $t = new Title(); $t->mInterwiki = $interwiki; $t->mFragment = $fragment; $t->mNamespace = $ns = intval( $ns ); - $t->mDbkeyform = str_replace( ' ', '_', $title ); + $t->mDbkeyform = strtr( $title, ' ', '_' ); $t->mArticleID = ( $ns >= 0 ) ? -1 : 0; $t->mUrlform = wfUrlencode( $t->mDbkeyform ); - $t->mTextform = str_replace( '_', ' ', $title ); + $t->mTextform = strtr( $title, '_', ' ' ); + $t->mContentModel = false; # initialized lazily in getContentModel() return $t; } @@ -293,18 +544,31 @@ class Title { * The parameters will be checked for validity, which is a bit slower * than makeTitle() but safer for user-provided data. * - * @param $ns \type{\int} the namespace of the article - * @param $title \type{\string} the database key form - * @param $fragment \type{\string} The link fragment (after the "#") - * @param $interwiki \type{\string} The interwiki prefix - * @return \type{Title} the new object, or NULL on an error + * Title objects returned by makeTitleSafe() are guaranteed to be valid, + * that is, they return true from the isValid() method. If no valid Title + * can be constructed from the input, this method returns null. + * + * @param int $ns The namespace of the article + * @param string $title Database key form + * @param string $fragment The link fragment (after the "#") + * @param string $interwiki Interwiki prefix + * @return Title|null The new object, or null on an error */ public static function makeTitleSafe( $ns, $title, $fragment = '', $interwiki = '' ) { + // NOTE: ideally, this would just call makeTitle() and then isValid(), + // but presently, that means more overhead on a potential performance hotspot. + + if ( !MWNamespace::exists( $ns ) ) { + return null; + } + $t = new Title(); - $t->mDbkeyform = Title::makeName( $ns, $title, $fragment, $interwiki ); - if ( $t->secureAndSplit() ) { + $t->mDbkeyform = self::makeName( $ns, $title, $fragment, $interwiki, true ); + + try { + $t->secureAndSplit(); return $t; - } else { + } catch ( MalformedTitleException $ex ) { return null; } } @@ -312,138 +576,30 @@ class Title { /** * Create a new Title for the Main Page * - * @return \type{Title} the new object + * @return Title The new object */ public static function newMainPage() { - $title = Title::newFromText( wfMsgForContent( 'mainpage' ) ); + $title = self::newFromText( wfMessage( 'mainpage' )->inContentLanguage()->text() ); // Don't give fatal errors if the message is broken if ( !$title ) { - $title = Title::newFromText( 'Main Page' ); + $title = self::newFromText( 'Main Page' ); } return $title; } - /** - * Extract a redirect destination from a string and return the - * Title, or null if the text doesn't contain a valid redirect - * This will only return the very next target, useful for - * the redirect table and other checks that don't need full recursion - * - * @param $text String: Text with possible redirect - * @return Title: The corresponding Title - */ - public static function newFromRedirect( $text ) { - return self::newFromRedirectInternal( $text ); - } - - /** - * Extract a redirect destination from a string and return the - * Title, or null if the text doesn't contain a valid redirect - * This will recurse down $wgMaxRedirects times or until a non-redirect target is hit - * in order to provide (hopefully) the Title of the final destination instead of another redirect - * - * @param $text \type{\string} Text with possible redirect - * @return \type{Title} The corresponding Title - */ - public static function newFromRedirectRecurse( $text ) { - $titles = self::newFromRedirectArray( $text ); - return $titles ? array_pop( $titles ) : null; - } - - /** - * Extract a redirect destination from a string and return an - * array of Titles, or null if the text doesn't contain a valid redirect - * The last element in the array is the final destination after all redirects - * have been resolved (up to $wgMaxRedirects times) - * - * @param $text \type{\string} Text with possible redirect - * @return \type{\array} Array of Titles, with the destination last - */ - public static function newFromRedirectArray( $text ) { - global $wgMaxRedirects; - // are redirects disabled? - if ( $wgMaxRedirects < 1 ) { - return null; - } - $title = self::newFromRedirectInternal( $text ); - if ( is_null( $title ) ) { - return null; - } - // recursive check to follow double redirects - $recurse = $wgMaxRedirects; - $titles = array( $title ); - while ( --$recurse > 0 ) { - if ( $title->isRedirect() ) { - $article = new Article( $title, 0 ); - $newtitle = $article->getRedirectTarget(); - } else { - break; - } - // Redirects to some special pages are not permitted - if ( $newtitle instanceOf Title && $newtitle->isValidRedirectTarget() ) { - // the new title passes the checks, so make that our current title so that further recursion can be checked - $title = $newtitle; - $titles[] = $newtitle; - } else { - break; - } - } - return $titles; - } - - /** - * Really extract the redirect destination - * Do not call this function directly, use one of the newFromRedirect* functions above - * - * @param $text \type{\string} Text with possible redirect - * @return \type{Title} The corresponding Title - */ - protected static function newFromRedirectInternal( $text ) { - $redir = MagicWord::get( 'redirect' ); - $text = trim( $text ); - if ( $redir->matchStartAndRemove( $text ) ) { - // Extract the first link and see if it's usable - // Ensure that it really does come directly after #REDIRECT - // Some older redirects included a colon, so don't freak about that! - $m = array(); - if ( preg_match( '!^\s*:?\s*\[{2}(.*?)(?:\|.*?)?\]{2}!', $text, $m ) ) { - // Strip preceding colon used to "escape" categories, etc. - // and URL-decode links - if ( strpos( $m[1], '%' ) !== false ) { - // Match behavior of inline link parsing here; - // don't interpret + as " " most of the time! - // It might be safe to just use rawurldecode instead, though. - $m[1] = urldecode( ltrim( $m[1], ':' ) ); - } - $title = Title::newFromText( $m[1] ); - // If the title is a redirect to bad special pages or is invalid, return null - if ( !$title instanceof Title || !$title->isValidRedirectTarget() ) { - return null; - } - return $title; - } - } - return null; - } - -# ---------------------------------------------------------------------------- -# Static functions -# ---------------------------------------------------------------------------- - /** * Get the prefixed DB key associated with an ID * - * @param $id \type{\int} the page_id of the article - * @return \type{Title} an object representing the article, or NULL - * if no such article was found + * @param int $id The page_id of the article + * @return Title|null An object representing the article, or null if no such article was found */ public static function nameOf( $id ) { - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); $s = $dbr->selectRow( 'page', - array( 'page_namespace', 'page_title' ), - array( 'page_id' => $id ), + [ 'page_namespace', 'page_title' ], + [ 'page_id' => $id ], __METHOD__ ); if ( $s === false ) { @@ -457,7 +613,7 @@ class Title { /** * Get a regex character class describing the legal characters in a link * - * @return \type{\string} the list of characters, not delimited + * @return string The list of characters, not delimited */ public static function legalChars() { global $wgLegalTitleChars; @@ -465,47 +621,142 @@ class Title { } /** - * Get a string representation of a title suitable for - * including in a search index + * Returns a simple regex that will match on characters and sequences invalid in titles. + * Note that this doesn't pick up many things that could be wrong with titles, but that + * replacing this regex with something valid will make many titles valid. * - * @param $ns \type{\int} a namespace index - * @param $title \type{\string} text-form main part - * @return \type{\string} a stripped-down title string ready for the - * search index + * @deprecated since 1.25, use MediaWikiTitleCodec::getTitleInvalidRegex() instead + * + * @return string Regex string */ - public static function indexTitle( $ns, $title ) { - global $wgContLang; - - $lc = SearchEngine::legalSearchChars() . '&#;'; - $t = $wgContLang->normalizeForSearch( $title ); - $t = preg_replace( "/[^{$lc}]+/", ' ', $t ); - $t = $wgContLang->lc( $t ); - - # Handle 's, s' - $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t ); - $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t ); - - $t = preg_replace( "/\\s+/", ' ', $t ); + static function getTitleInvalidRegex() { + wfDeprecated( __METHOD__, '1.25' ); + return MediaWikiTitleCodec::getTitleInvalidRegex(); + } - if ( $ns == NS_FILE ) { - $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t ); + /** + * Utility method for converting a character sequence from bytes to Unicode. + * + * Primary usecase being converting $wgLegalTitleChars to a sequence usable in + * javascript, as PHP uses UTF-8 bytes where javascript uses Unicode code units. + * + * @param string $byteClass + * @return string + */ + public static function convertByteClassToUnicodeClass( $byteClass ) { + $length = strlen( $byteClass ); + // Input token queue + $x0 = $x1 = $x2 = ''; + // Decoded queue + $d0 = $d1 = $d2 = ''; + // Decoded integer codepoints + $ord0 = $ord1 = $ord2 = 0; + // Re-encoded queue + $r0 = $r1 = $r2 = ''; + // Output + $out = ''; + // Flags + $allowUnicode = false; + for ( $pos = 0; $pos < $length; $pos++ ) { + // Shift the queues down + $x2 = $x1; + $x1 = $x0; + $d2 = $d1; + $d1 = $d0; + $ord2 = $ord1; + $ord1 = $ord0; + $r2 = $r1; + $r1 = $r0; + // Load the current input token and decoded values + $inChar = $byteClass[$pos]; + if ( $inChar == '\\' ) { + if ( preg_match( '/x([0-9a-fA-F]{2})/A', $byteClass, $m, 0, $pos + 1 ) ) { + $x0 = $inChar . $m[0]; + $d0 = chr( hexdec( $m[1] ) ); + $pos += strlen( $m[0] ); + } elseif ( preg_match( '/[0-7]{3}/A', $byteClass, $m, 0, $pos + 1 ) ) { + $x0 = $inChar . $m[0]; + $d0 = chr( octdec( $m[0] ) ); + $pos += strlen( $m[0] ); + } elseif ( $pos + 1 >= $length ) { + $x0 = $d0 = '\\'; + } else { + $d0 = $byteClass[$pos + 1]; + $x0 = $inChar . $d0; + $pos += 1; + } + } else { + $x0 = $d0 = $inChar; + } + $ord0 = ord( $d0 ); + // Load the current re-encoded value + if ( $ord0 < 32 || $ord0 == 0x7f ) { + $r0 = sprintf( '\x%02x', $ord0 ); + } elseif ( $ord0 >= 0x80 ) { + // Allow unicode if a single high-bit character appears + $r0 = sprintf( '\x%02x', $ord0 ); + $allowUnicode = true; + } elseif ( strpos( '-\\[]^', $d0 ) !== false ) { + $r0 = '\\' . $d0; + } else { + $r0 = $d0; + } + // Do the output + if ( $x0 !== '' && $x1 === '-' && $x2 !== '' ) { + // Range + if ( $ord2 > $ord0 ) { + // Empty range + } elseif ( $ord0 >= 0x80 ) { + // Unicode range + $allowUnicode = true; + if ( $ord2 < 0x80 ) { + // Keep the non-unicode section of the range + $out .= "$r2-\\x7F"; + } + } else { + // Normal range + $out .= "$r2-$r0"; + } + // Reset state to the initial value + $x0 = $x1 = $d0 = $d1 = $r0 = $r1 = ''; + } elseif ( $ord2 < 0x80 ) { + // ASCII character + $out .= $r2; + } + } + if ( $ord1 < 0x80 ) { + $out .= $r1; + } + if ( $ord0 < 0x80 ) { + $out .= $r0; } - return trim( $t ); + if ( $allowUnicode ) { + $out .= '\u0080-\uFFFF'; + } + return $out; } /** * Make a prefixed DB key from a DB key and a namespace index * - * @param $ns \type{\int} numerical representation of the namespace - * @param $title \type{\string} the DB key form the title - * @param $fragment \type{\string} The link fragment (after the "#") - * @param $interwiki \type{\string} The interwiki prefix - * @return \type{\string} the prefixed form of the title - */ - public static function makeName( $ns, $title, $fragment = '', $interwiki = '' ) { + * @param int $ns Numerical representation of the namespace + * @param string $title The DB key form the title + * @param string $fragment The link fragment (after the "#") + * @param string $interwiki The interwiki prefix + * @param bool $canonicalNamespace If true, use the canonical name for + * $ns instead of the localized version. + * @return string The prefixed form of the title + */ + public static function makeName( $ns, $title, $fragment = '', $interwiki = '', + $canonicalNamespace = false + ) { global $wgContLang; - $namespace = $wgContLang->getNsText( $ns ); + if ( $canonicalNamespace ) { + $namespace = MWNamespace::getCanonicalName( $ns ); + } else { + $namespace = $wgContLang->getNsText( $ns ); + } $name = $namespace == '' ? $title : "$namespace:$title"; if ( strval( $interwiki ) != '' ) { $name = "$interwiki:$name"; @@ -517,130 +768,295 @@ class Title { } /** - * Determine whether the object refers to a page within - * this project. + * Escape a text fragment, say from a link, for a URL * - * @return \type{\bool} TRUE if this is an in-project interwiki link - * or a wikilink, FALSE otherwise + * @deprecated since 1.30, use Sanitizer::escapeIdForLink() or escapeIdForExternalInterwiki() + * + * @param string $fragment Containing a URL or link fragment (after the "#") + * @return string Escaped string */ - public function isLocal() { - if ( $this->mInterwiki != '' ) { - return Interwiki::fetch( $this->mInterwiki )->isLocal(); - } else { - return true; - } + static function escapeFragmentForURL( $fragment ) { + # Note that we don't urlencode the fragment. urlencoded Unicode + # fragments appear not to work in IE (at least up to 7) or in at least + # one version of Opera 9.x. The W3C validator, for one, doesn't seem + # to care if they aren't encoded. + return Sanitizer::escapeId( $fragment, 'noninitial' ); } /** - * Determine whether the object refers to a page within - * this project and is transcludable. + * Callback for usort() to do title sorts by (namespace, title) * - * @return \type{\bool} TRUE if this is transcludable + * @param LinkTarget $a + * @param LinkTarget $b + * + * @return int Result of string comparison, or namespace comparison */ - public function isTrans() { - if ( $this->mInterwiki == '' ) { - return false; + public static function compare( LinkTarget $a, LinkTarget $b ) { + if ( $a->getNamespace() == $b->getNamespace() ) { + return strcmp( $a->getText(), $b->getText() ); + } else { + return $a->getNamespace() - $b->getNamespace(); } - - return Interwiki::fetch( $this->mInterwiki )->isTranscludable(); } /** - * Returns the DB name of the distant wiki - * which owns the object. + * Returns true if the title is valid, false if it is invalid. * - * @return \type{\string} the DB name + * Valid titles can be round-tripped via makeTitleSafe() and newFromText(). + * Invalid titles may get returned from makeTitle(), and it may be useful to + * allow them to exist, e.g. in order to process log entries about pages in + * namespaces that belong to extensions that are no longer installed. + * + * @note This method is relatively expensive. When constructing Title + * objects that need to be valid, use an instantiator method that is guaranteed + * to return valid titles, such as makeTitleSafe() or newFromText(). + * + * @return bool */ - public function getTransWikiID() { - if ( $this->mInterwiki == '' ) { + public function isValid() { + $ns = $this->getNamespace(); + + if ( !MWNamespace::exists( $ns ) ) { return false; } - return Interwiki::fetch( $this->mInterwiki )->getWikiID(); + try { + $parser = MediaWikiServices::getInstance()->getTitleParser(); + $parser->parseTitle( $this->getDBkey(), $ns ); + return true; + } catch ( MalformedTitleException $ex ) { + return false; + } } /** - * Escape a text fragment, say from a link, for a URL + * Determine whether the object refers to a page within + * this project (either this wiki or a wiki with a local + * interwiki, see https://www.mediawiki.org/wiki/Manual:Interwiki_table#iw_local ) * - * @param $fragment string containing a URL or link fragment (after the "#") - * @return String: escaped string + * @return bool True if this is an in-project interwiki link or a wikilink, false otherwise */ - static function escapeFragmentForURL( $fragment ) { - # Note that we don't urlencode the fragment. urlencoded Unicode - # fragments appear not to work in IE (at least up to 7) or in at least - # one version of Opera 9.x. The W3C validator, for one, doesn't seem - # to care if they aren't encoded. - return Sanitizer::escapeId( $fragment, 'noninitial' ); + public function isLocal() { + if ( $this->isExternal() ) { + $iw = self::getInterwikiLookup()->fetch( $this->mInterwiki ); + if ( $iw ) { + return $iw->isLocal(); + } + } + return true; + } + + /** + * Is this Title interwiki? + * + * @return bool + */ + public function isExternal() { + return $this->mInterwiki !== ''; + } + + /** + * Get the interwiki prefix + * + * Use Title::isExternal to check if a interwiki is set + * + * @return string Interwiki prefix + */ + public function getInterwiki() { + return $this->mInterwiki; } -# ---------------------------------------------------------------------------- -# Other stuff -# ---------------------------------------------------------------------------- + /** + * Was this a local interwiki link? + * + * @return bool + */ + public function wasLocalInterwiki() { + return $this->mLocalInterwiki; + } + + /** + * Determine whether the object refers to a page within + * this project and is transcludable. + * + * @return bool True if this is transcludable + */ + public function isTrans() { + if ( !$this->isExternal() ) { + return false; + } + + return self::getInterwikiLookup()->fetch( $this->mInterwiki )->isTranscludable(); + } + + /** + * Returns the DB name of the distant wiki which owns the object. + * + * @return string|false The DB name + */ + public function getTransWikiID() { + if ( !$this->isExternal() ) { + return false; + } + + return self::getInterwikiLookup()->fetch( $this->mInterwiki )->getWikiID(); + } + + /** + * Get a TitleValue object representing this Title. + * + * @note Not all valid Titles have a corresponding valid TitleValue + * (e.g. TitleValues cannot represent page-local links that have a + * fragment but no title text). + * + * @return TitleValue|null + */ + public function getTitleValue() { + if ( $this->mTitleValue === null ) { + try { + $this->mTitleValue = new TitleValue( + $this->getNamespace(), + $this->getDBkey(), + $this->getFragment(), + $this->getInterwiki() + ); + } catch ( InvalidArgumentException $ex ) { + wfDebug( __METHOD__ . ': Can\'t create a TitleValue for [[' . + $this->getPrefixedText() . ']]: ' . $ex->getMessage() . "\n" ); + } + } + + return $this->mTitleValue; + } - /** Simple accessors */ /** * Get the text form (spaces not underscores) of the main part * - * @return \type{\string} Main part of the title + * @return string Main part of the title */ - public function getText() { return $this->mTextform; } + public function getText() { + return $this->mTextform; + } /** * Get the URL-encoded form of the main part * - * @return \type{\string} Main part of the title, URL-encoded + * @return string Main part of the title, URL-encoded */ - public function getPartialURL() { return $this->mUrlform; } + public function getPartialURL() { + return $this->mUrlform; + } /** * Get the main part with underscores * - * @return String: Main part of the title, with underscores + * @return string Main part of the title, with underscores */ - public function getDBkey() { return $this->mDbkeyform; } + public function getDBkey() { + return $this->mDbkeyform; + } /** - * Get the namespace index, i.e.\ one of the NS_xxxx constants. + * Get the DB key with the initial letter case as specified by the user * - * @return Integer: Namespace index + * @return string DB key */ - public function getNamespace() { return $this->mNamespace; } + function getUserCaseDBKey() { + if ( !is_null( $this->mUserCaseDBKey ) ) { + return $this->mUserCaseDBKey; + } else { + // If created via makeTitle(), $this->mUserCaseDBKey is not set. + return $this->mDbkeyform; + } + } + + /** + * Get the namespace index, i.e. one of the NS_xxxx constants. + * + * @return int Namespace index + */ + public function getNamespace() { + return $this->mNamespace; + } + + /** + * Get the page's content model id, see the CONTENT_MODEL_XXX constants. + * + * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update + * @return string Content model id + */ + public function getContentModel( $flags = 0 ) { + if ( !$this->mForcedContentModel + && ( !$this->mContentModel || $flags === self::GAID_FOR_UPDATE ) + && $this->getArticleID( $flags ) + ) { + $linkCache = LinkCache::singleton(); + $linkCache->addLinkObj( $this ); # in case we already had an article ID + $this->mContentModel = $linkCache->getGoodLinkFieldObj( $this, 'model' ); + } + + if ( !$this->mContentModel ) { + $this->mContentModel = ContentHandler::getDefaultModelFor( $this ); + } + + return $this->mContentModel; + } + + /** + * Convenience method for checking a title's content model name + * + * @param string $id The content model ID (use the CONTENT_MODEL_XXX constants). + * @return bool True if $this->getContentModel() == $id + */ + public function hasContentModel( $id ) { + return $this->getContentModel() == $id; + } + + /** + * Set a proposed content model for the page for permissions + * checking. This does not actually change the content model + * of a title! + * + * Additionally, you should make sure you've checked + * ContentHandler::canBeUsedOn() first. + * + * @since 1.28 + * @param string $model CONTENT_MODEL_XXX constant + */ + public function setContentModel( $model ) { + $this->mContentModel = $model; + $this->mForcedContentModel = true; + } /** * Get the namespace text * - * @return String: Namespace text + * @return string|false Namespace text */ public function getNsText() { - global $wgContLang; - - if ( $this->mInterwiki != '' ) { - // This probably shouldn't even happen. ohh man, oh yuck. - // But for interwiki transclusion it sometimes does. - // Shit. Shit shit shit. - // + if ( $this->isExternal() ) { + // This probably shouldn't even happen, + // but for interwiki transclusion it sometimes does. // Use the canonical namespaces if possible to try to // resolve a foreign namespace. if ( MWNamespace::exists( $this->mNamespace ) ) { return MWNamespace::getCanonicalName( $this->mNamespace ); } } - return $wgContLang->getNsText( $this->mNamespace ); - } - /** - * Get the DB key with the initial letter case as specified by the user - * - * @return \type{\string} DB key - */ - function getUserCaseDBKey() { - return $this->mUserCaseDBKey; + try { + $formatter = self::getTitleFormatter(); + return $formatter->getNamespaceName( $this->mNamespace, $this->mDbkeyform ); + } catch ( InvalidArgumentException $ex ) { + wfDebug( __METHOD__ . ': ' . $ex->getMessage() . "\n" ); + return false; + } } /** * Get the namespace text of the subject (rather than talk) page * - * @return \type{\string} Namespace text + * @return string Namespace text */ public function getSubjectNsText() { global $wgContLang; @@ -650,74 +1066,478 @@ class Title { /** * Get the namespace text of the talk page * - * @return \type{\string} Namespace text + * @return string Namespace text */ public function getTalkNsText() { global $wgContLang; - return( $wgContLang->getNsText( MWNamespace::getTalk( $this->mNamespace ) ) ); + return $wgContLang->getNsText( MWNamespace::getTalk( $this->mNamespace ) ); } /** - * Could this title have a corresponding talk page? + * Can this title have a corresponding talk page? + * + * @deprecated since 1.30, use canHaveTalkPage() instead. * - * @return \type{\bool} TRUE or FALSE + * @return bool True if this title either is a talk page or can have a talk page associated. */ public function canTalk() { - return( MWNamespace::canTalk( $this->mNamespace ) ); + return $this->canHaveTalkPage(); + } + + /** + * Can this title have a corresponding talk page? + * + * @see MWNamespace::hasTalkNamespace + * @since 1.30 + * + * @return bool True if this title either is a talk page or can have a talk page associated. + */ + public function canHaveTalkPage() { + return MWNamespace::hasTalkNamespace( $this->mNamespace ); + } + + /** + * Is this in a namespace that allows actual pages? + * + * @return bool + */ + public function canExist() { + return $this->mNamespace >= NS_MAIN; + } + + /** + * Can this title be added to a user's watchlist? + * + * @return bool + */ + public function isWatchable() { + return !$this->isExternal() && MWNamespace::isWatchable( $this->getNamespace() ); } /** - * Get the interwiki prefix (or null string) + * Returns true if this is a special page. * - * @return \type{\string} Interwiki prefix + * @return bool */ - public function getInterwiki() { return $this->mInterwiki; } + public function isSpecialPage() { + return $this->getNamespace() == NS_SPECIAL; + } + + /** + * Returns true if this title resolves to the named special page + * + * @param string $name The special page name + * @return bool + */ + public function isSpecial( $name ) { + if ( $this->isSpecialPage() ) { + list( $thisName, /* $subpage */ ) = SpecialPageFactory::resolveAlias( $this->getDBkey() ); + if ( $name == $thisName ) { + return true; + } + } + return false; + } + + /** + * If the Title refers to a special page alias which is not the local default, resolve + * the alias, and localise the name as necessary. Otherwise, return $this + * + * @return Title + */ + public function fixSpecialName() { + if ( $this->isSpecialPage() ) { + list( $canonicalName, $par ) = SpecialPageFactory::resolveAlias( $this->mDbkeyform ); + if ( $canonicalName ) { + $localName = SpecialPageFactory::getLocalNameFor( $canonicalName, $par ); + if ( $localName != $this->mDbkeyform ) { + return self::makeTitle( NS_SPECIAL, $localName ); + } + } + } + return $this; + } + + /** + * Returns true if the title is inside the specified namespace. + * + * Please make use of this instead of comparing to getNamespace() + * This function is much more resistant to changes we may make + * to namespaces than code that makes direct comparisons. + * @param int $ns The namespace + * @return bool + * @since 1.19 + */ + public function inNamespace( $ns ) { + return MWNamespace::equals( $this->getNamespace(), $ns ); + } + + /** + * Returns true if the title is inside one of the specified namespaces. + * + * @param int|int[] $namespaces,... The namespaces to check for + * @return bool + * @since 1.19 + */ + public function inNamespaces( /* ... */ ) { + $namespaces = func_get_args(); + if ( count( $namespaces ) > 0 && is_array( $namespaces[0] ) ) { + $namespaces = $namespaces[0]; + } + + foreach ( $namespaces as $ns ) { + if ( $this->inNamespace( $ns ) ) { + return true; + } + } + + return false; + } + + /** + * Returns true if the title has the same subject namespace as the + * namespace specified. + * For example this method will take NS_USER and return true if namespace + * is either NS_USER or NS_USER_TALK since both of them have NS_USER + * as their subject namespace. + * + * This is MUCH simpler than individually testing for equivalence + * against both NS_USER and NS_USER_TALK, and is also forward compatible. + * @since 1.19 + * @param int $ns + * @return bool + */ + public function hasSubjectNamespace( $ns ) { + return MWNamespace::subjectEquals( $this->getNamespace(), $ns ); + } + + /** + * Is this Title in a namespace which contains content? + * In other words, is this a content page, for the purposes of calculating + * statistics, etc? + * + * @return bool + */ + public function isContentPage() { + return MWNamespace::isContent( $this->getNamespace() ); + } + + /** + * Would anybody with sufficient privileges be able to move this page? + * Some pages just aren't movable. + * + * @return bool + */ + public function isMovable() { + if ( !MWNamespace::isMovable( $this->getNamespace() ) || $this->isExternal() ) { + // Interwiki title or immovable namespace. Hooks don't get to override here + return false; + } + + $result = true; + Hooks::run( 'TitleIsMovable', [ $this, &$result ] ); + return $result; + } + + /** + * Is this the mainpage? + * @note Title::newFromText seems to be sufficiently optimized by the title + * cache that we don't need to over-optimize by doing direct comparisons and + * accidentally creating new bugs where $title->equals( Title::newFromText() ) + * ends up reporting something differently than $title->isMainPage(); + * + * @since 1.18 + * @return bool + */ + public function isMainPage() { + return $this->equals( self::newMainPage() ); + } + + /** + * Is this a subpage? + * + * @return bool + */ + public function isSubpage() { + return MWNamespace::hasSubpages( $this->mNamespace ) + ? strpos( $this->getText(), '/' ) !== false + : false; + } + + /** + * Is this a conversion table for the LanguageConverter? + * + * @return bool + */ + public function isConversionTable() { + // @todo ConversionTable should become a separate content model. + + return $this->getNamespace() == NS_MEDIAWIKI && + strpos( $this->getText(), 'Conversiontable/' ) === 0; + } + + /** + * Does that page contain wikitext, or it is JS, CSS or whatever? + * + * @return bool + */ + public function isWikitextPage() { + return $this->hasContentModel( CONTENT_MODEL_WIKITEXT ); + } + + /** + * Could this page contain custom CSS or JavaScript for the global UI. + * This is generally true for pages in the MediaWiki namespace having CONTENT_MODEL_CSS + * or CONTENT_MODEL_JAVASCRIPT. + * + * This method does *not* return true for per-user JS/CSS. Use isCssJsSubpage() + * for that! + * + * Note that this method should not return true for pages that contain and + * show "inactive" CSS or JS. + * + * @return bool + * @todo FIXME: Rename to isSiteConfigPage() and remove deprecated hook + */ + public function isCssOrJsPage() { + $isCssOrJsPage = NS_MEDIAWIKI == $this->mNamespace + && ( $this->hasContentModel( CONTENT_MODEL_CSS ) + || $this->hasContentModel( CONTENT_MODEL_JAVASCRIPT ) ); + + return $isCssOrJsPage; + } + + /** + * Is this a .css or .js subpage of a user page? + * @return bool + * @todo FIXME: Rename to isUserConfigPage() + */ + public function isCssJsSubpage() { + return ( NS_USER == $this->mNamespace && $this->isSubpage() + && ( $this->hasContentModel( CONTENT_MODEL_CSS ) + || $this->hasContentModel( CONTENT_MODEL_JAVASCRIPT ) ) ); + } + + /** + * Trim down a .css or .js subpage title to get the corresponding skin name + * + * @return string Containing skin name from .css or .js subpage title + */ + public function getSkinFromCssJsSubpage() { + $subpage = explode( '/', $this->mTextform ); + $subpage = $subpage[count( $subpage ) - 1]; + $lastdot = strrpos( $subpage, '.' ); + if ( $lastdot === false ) { + return $subpage; # Never happens: only called for names ending in '.css' or '.js' + } + return substr( $subpage, 0, $lastdot ); + } + + /** + * Is this a .css subpage of a user page? + * + * @return bool + */ + public function isCssSubpage() { + return ( NS_USER == $this->mNamespace && $this->isSubpage() + && $this->hasContentModel( CONTENT_MODEL_CSS ) ); + } + + /** + * Is this a .js subpage of a user page? + * + * @return bool + */ + public function isJsSubpage() { + return ( NS_USER == $this->mNamespace && $this->isSubpage() + && $this->hasContentModel( CONTENT_MODEL_JAVASCRIPT ) ); + } + + /** + * Is this a talk page of some sort? + * + * @return bool + */ + public function isTalkPage() { + return MWNamespace::isTalk( $this->getNamespace() ); + } + + /** + * Get a Title object associated with the talk page of this article + * + * @return Title The object for the talk page + */ + public function getTalkPage() { + return self::makeTitle( MWNamespace::getTalk( $this->getNamespace() ), $this->getDBkey() ); + } + + /** + * Get a Title object associated with the talk page of this article, + * if such a talk page can exist. + * + * @since 1.30 + * + * @return Title|null The object for the talk page, + * or null if no associated talk page can exist, according to canHaveTalkPage(). + */ + public function getTalkPageIfDefined() { + if ( !$this->canHaveTalkPage() ) { + return null; + } + + return $this->getTalkPage(); + } + + /** + * Get a title object associated with the subject page of this + * talk page + * + * @return Title The object for the subject page + */ + public function getSubjectPage() { + // Is this the same title? + $subjectNS = MWNamespace::getSubject( $this->getNamespace() ); + if ( $this->getNamespace() == $subjectNS ) { + return $this; + } + return self::makeTitle( $subjectNS, $this->getDBkey() ); + } + + /** + * Get the other title for this page, if this is a subject page + * get the talk page, if it is a subject page get the talk page + * + * @since 1.25 + * @throws MWException If the page doesn't have an other page + * @return Title + */ + public function getOtherPage() { + if ( $this->isSpecialPage() ) { + throw new MWException( 'Special pages cannot have other pages' ); + } + if ( $this->isTalkPage() ) { + return $this->getSubjectPage(); + } else { + if ( !$this->canHaveTalkPage() ) { + throw new MWException( "{$this->getPrefixedText()} does not have an other page" ); + } + return $this->getTalkPage(); + } + } + + /** + * Get the default namespace index, for when there is no namespace + * + * @return int Default namespace index + */ + public function getDefaultNamespace() { + return $this->mDefaultNamespace; + } /** * Get the Title fragment (i.e.\ the bit after the #) in text form * - * @return \type{\string} Title fragment + * Use Title::hasFragment to check for a fragment + * + * @return string Title fragment */ - public function getFragment() { return $this->mFragment; } + public function getFragment() { + return $this->mFragment; + } + + /** + * Check if a Title fragment is set + * + * @return bool + * @since 1.23 + */ + public function hasFragment() { + return $this->mFragment !== ''; + } /** * Get the fragment in URL form, including the "#" character if there is one - * @return \type{\string} Fragment in URL form + * + * @return string Fragment in URL form */ public function getFragmentForURL() { - if ( $this->mFragment == '' ) { + if ( !$this->hasFragment() ) { return ''; - } else { - return '#' . Title::escapeFragmentForURL( $this->mFragment ); + } elseif ( $this->isExternal() && !$this->getTransWikiID() ) { + return '#' . Sanitizer::escapeIdForExternalInterwiki( $this->getFragment() ); } + return '#' . Sanitizer::escapeIdForLink( $this->getFragment() ); } /** - * Get the default namespace index, for when there is no namespace + * Set the fragment for this title. Removes the first character from the + * specified fragment before setting, so it assumes you're passing it with + * an initial "#". + * + * Deprecated for public use, use Title::makeTitle() with fragment parameter, + * or Title::createFragmentTarget(). + * Still in active use privately. + * + * @private + * @param string $fragment Text + */ + public function setFragment( $fragment ) { + $this->mFragment = strtr( substr( $fragment, 1 ), '_', ' ' ); + } + + /** + * Creates a new Title for a different fragment of the same page. * - * @return \type{\int} Default namespace index + * @since 1.27 + * @param string $fragment + * @return Title */ - public function getDefaultNamespace() { return $this->mDefaultNamespace; } + public function createFragmentTarget( $fragment ) { + return self::makeTitle( + $this->getNamespace(), + $this->getText(), + $fragment, + $this->getInterwiki() + ); + } /** - * Get title for search index + * Prefix some arbitrary text with the namespace or interwiki prefix + * of this object * - * @return \type{\string} a stripped-down title string ready for the - * search index + * @param string $name The text + * @return string The prefixed text */ - public function getIndexTitle() { - return Title::indexTitle( $this->mNamespace, $this->mTextform ); + private function prefix( $name ) { + global $wgContLang; + + $p = ''; + if ( $this->isExternal() ) { + $p = $this->mInterwiki . ':'; + } + + if ( 0 != $this->mNamespace ) { + $nsText = $this->getNsText(); + + if ( $nsText === false ) { + // See T165149. Awkward, but better than erroneously linking to the main namespace. + $nsText = $wgContLang->getNsText( NS_SPECIAL ) . ":Badtitle/NS{$this->mNamespace}"; + } + + $p .= $nsText . ':'; + } + return $p . $name; } /** * Get the prefixed database key form * - * @return \type{\string} the prefixed title, with underscores and + * @return string The prefixed title, with underscores and * any interwiki and namespace prefixes */ public function getPrefixedDBkey() { $s = $this->prefix( $this->mDbkeyform ); - $s = str_replace( ' ', '_', $s ); + $s = strtr( $s, ' ', '_' ); return $s; } @@ -725,36 +1545,86 @@ class Title { * Get the prefixed title with spaces. * This is the form usually used for display * - * @return \type{\string} the prefixed title, with spaces + * @return string The prefixed title, with spaces */ public function getPrefixedText() { - if ( empty( $this->mPrefixedText ) ) { // FIXME: bad usage of empty() ? + if ( $this->mPrefixedText === null ) { $s = $this->prefix( $this->mTextform ); - $s = str_replace( '_', ' ', $s ); + $s = strtr( $s, '_', ' ' ); $this->mPrefixedText = $s; } return $this->mPrefixedText; } + /** + * Return a string representation of this title + * + * @return string Representation of this title + */ + public function __toString() { + return $this->getPrefixedText(); + } + /** * Get the prefixed title with spaces, plus any fragment * (part beginning with '#') * - * @return \type{\string} the prefixed title, with spaces and - * the fragment, including '#' + * @return string The prefixed title, with spaces and the fragment, including '#' */ public function getFullText() { $text = $this->getPrefixedText(); - if ( $this->mFragment != '' ) { - $text .= '#' . $this->mFragment; + if ( $this->hasFragment() ) { + $text .= '#' . $this->getFragment(); } return $text; } /** - * Get the base name, i.e. the leftmost parts before the / + * Get the root page name text without a namespace, i.e. the leftmost part before any slashes + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getRootText(); + * # returns: 'Foo' + * @endcode * - * @return \type{\string} Base name + * @return string Root name + * @since 1.20 + */ + public function getRootText() { + if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) { + return $this->getText(); + } + + return strtok( $this->getText(), '/' ); + } + + /** + * Get the root page name title, i.e. the leftmost part before any slashes + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getRootTitle(); + * # returns: Title{User:Foo} + * @endcode + * + * @return Title Root title + * @since 1.20 + */ + public function getRootTitle() { + return self::makeTitle( $this->getNamespace(), $this->getRootText() ); + } + + /** + * Get the base page name without a namespace, i.e. the part before the subpage name + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getBaseText(); + * # returns: 'Foo/Bar' + * @endcode + * + * @return string Base name */ public function getBaseText() { if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) { @@ -770,135 +1640,229 @@ class Title { } /** - * Get the lowest-level subpage name, i.e. the rightmost part after / + * Get the base page name title, i.e. the part before the subpage name + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getBaseTitle(); + * # returns: Title{User:Foo/Bar} + * @endcode * - * @return \type{\string} Subpage name + * @return Title Base title + * @since 1.20 + */ + public function getBaseTitle() { + return self::makeTitle( $this->getNamespace(), $this->getBaseText() ); + } + + /** + * Get the lowest-level subpage name, i.e. the rightmost part after any slashes + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getSubpageText(); + * # returns: "Baz" + * @endcode + * + * @return string Subpage name */ public function getSubpageText() { if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) { - return( $this->mTextform ); + return $this->mTextform; } $parts = explode( '/', $this->mTextform ); - return( $parts[count( $parts ) - 1] ); + return $parts[count( $parts ) - 1]; + } + + /** + * Get the title for a subpage of the current page + * + * @par Example: + * @code + * Title::newFromText('User:Foo/Bar/Baz')->getSubpage("Asdf"); + * # returns: Title{User:Foo/Bar/Baz/Asdf} + * @endcode + * + * @param string $text The subpage name to add to the title + * @return Title Subpage title + * @since 1.20 + */ + public function getSubpage( $text ) { + return self::makeTitleSafe( $this->getNamespace(), $this->getText() . '/' . $text ); } /** * Get a URL-encoded form of the subpage text * - * @return \type{\string} URL-encoded subpage name + * @return string URL-encoded subpage name */ public function getSubpageUrlForm() { $text = $this->getSubpageText(); - $text = wfUrlencode( str_replace( ' ', '_', $text ) ); - return( $text ); + $text = wfUrlencode( strtr( $text, ' ', '_' ) ); + return $text; } /** * Get a URL-encoded title (not an actual URL) including interwiki * - * @return \type{\string} the URL-encoded form + * @return string The URL-encoded form */ public function getPrefixedURL() { $s = $this->prefix( $this->mDbkeyform ); - $s = wfUrlencode( str_replace( ' ', '_', $s ) ); + $s = wfUrlencode( strtr( $s, ' ', '_' ) ); return $s; } + /** + * Helper to fix up the get{Canonical,Full,Link,Local,Internal}URL args + * get{Canonical,Full,Link,Local,Internal}URL methods accepted an optional + * second argument named variant. This was deprecated in favor + * of passing an array of option with a "variant" key + * Once $query2 is removed for good, this helper can be dropped + * and the wfArrayToCgi moved to getLocalURL(); + * + * @since 1.19 (r105919) + * @param array|string $query + * @param string|string[]|bool $query2 + * @return string + */ + private static function fixUrlQueryArgs( $query, $query2 = false ) { + if ( $query2 !== false ) { + wfDeprecated( "Title::get{Canonical,Full,Link,Local,Internal}URL " . + "method called with a second parameter is deprecated. Add your " . + "parameter to an array passed as the first parameter.", "1.19" ); + } + if ( is_array( $query ) ) { + $query = wfArrayToCgi( $query ); + } + if ( $query2 ) { + if ( is_string( $query2 ) ) { + // $query2 is a string, we will consider this to be + // a deprecated $variant argument and add it to the query + $query2 = wfArrayToCgi( [ 'variant' => $query2 ] ); + } else { + $query2 = wfArrayToCgi( $query2 ); + } + // If we have $query content add a & to it first + if ( $query ) { + $query .= '&'; + } + // Now append the queries together + $query .= $query2; + } + return $query; + } + /** * Get a real URL referring to this title, with interwiki link and * fragment * - * @param $query \twotypes{\string,\array} an optional query string, not used for interwiki - * links. Can be specified as an associative array as well, e.g., - * array( 'action' => 'edit' ) (keys and values will be URL-escaped). - * @param $variant \type{\string} language variant of url (for sr, zh..) - * @return \type{\string} the URL + * @see self::getLocalURL for the arguments. + * @see wfExpandUrl + * @param string|string[] $query + * @param string|string[]|bool $query2 + * @param string $proto Protocol type to use in URL + * @return string The URL */ - public function getFullURL( $query = '', $variant = false ) { - global $wgServer, $wgRequest; - - if ( is_array( $query ) ) { - $query = wfArrayToCGI( $query ); - } + public function getFullURL( $query = '', $query2 = false, $proto = PROTO_RELATIVE ) { + $query = self::fixUrlQueryArgs( $query, $query2 ); - $interwiki = Interwiki::fetch( $this->mInterwiki ); - if ( !$interwiki ) { - $url = $this->getLocalURL( $query, $variant ); + # Hand off all the decisions on urls to getLocalURL + $url = $this->getLocalURL( $query ); - // Ugly quick hack to avoid duplicate prefixes (bug 4571 etc) - // Correct fix would be to move the prepending elsewhere. - if ( $wgRequest->getVal( 'action' ) != 'render' ) { - $url = $wgServer . $url; - } - } else { - $baseUrl = $interwiki->getURL(); - - $namespace = wfUrlencode( $this->getNsText() ); - if ( $namespace != '' ) { - # Can this actually happen? Interwikis shouldn't be parsed. - # Yes! It can in interwiki transclusion. But... it probably shouldn't. - $namespace .= ':'; - } - $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl ); - $url = wfAppendQuery( $url, $query ); - } + # Expand the url to make it a full url. Note that getLocalURL has the + # potential to output full urls for a variety of reasons, so we use + # wfExpandUrl instead of simply prepending $wgServer + $url = wfExpandUrl( $url, $proto ); # Finally, add the fragment. $url .= $this->getFragmentForURL(); - - wfRunHooks( 'GetFullURL', array( &$this, &$url, $query ) ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetFullURL', [ &$titleRef, &$url, $query ] ); return $url; } /** - * Get a URL with no fragment or server name. If this page is generated - * with action=render, $wgServer is prepended. + * Get a url appropriate for making redirects based on an untrusted url arg + * + * This is basically the same as getFullUrl(), but in the case of external + * interwikis, we send the user to a landing page, to prevent possible + * phishing attacks and the like. + * + * @note Uses current protocol by default, since technically relative urls + * aren't allowed in redirects per HTTP spec, so this is not suitable for + * places where the url gets cached, as might pollute between + * https and non-https users. + * @see self::getLocalURL for the arguments. + * @param array|string $query + * @param string $proto Protocol type to use in URL + * @return string A url suitable to use in an HTTP location header. + */ + public function getFullUrlForRedirect( $query = '', $proto = PROTO_CURRENT ) { + $target = $this; + if ( $this->isExternal() ) { + $target = SpecialPage::getTitleFor( + 'GoToInterwiki', + $this->getPrefixedDBKey() + ); + } + return $target->getFullUrl( $query, false, $proto ); + } + + /** + * Get a URL with no fragment or server name (relative URL) from a Title object. + * If this page is generated with action=render, however, + * $wgServer is prepended to make an absolute URL. + * + * @see self::getFullURL to always get an absolute URL. + * @see self::getLinkURL to always get a URL that's the simplest URL that will be + * valid to link, locally, to the current Title. + * @see self::newFromText to produce a Title object. * - * @param $query Mixed: an optional query string; if not specified, - * $wgArticlePath will be used. Can be specified as an associative array - * as well, e.g., array( 'action' => 'edit' ) (keys and values will be - * URL-escaped). - * @param $variant \type{\string} language variant of url (for sr, zh..) - * @return \type{\string} the URL + * @param string|string[] $query An optional query string, + * not used for interwiki links. Can be specified as an associative array as well, + * e.g., array( 'action' => 'edit' ) (keys and values will be URL-escaped). + * Some query patterns will trigger various shorturl path replacements. + * @param string|string[]|bool $query2 An optional secondary query array. This one MUST + * be an array. If a string is passed it will be interpreted as a deprecated + * variant argument and urlencoded into a variant= argument. + * This second query argument will be added to the $query + * The second parameter is deprecated since 1.19. Pass it as a key,value + * pair in the first parameter array instead. + * + * @return string String of the URL. */ - public function getLocalURL( $query = '', $variant = false ) { + public function getLocalURL( $query = '', $query2 = false ) { global $wgArticlePath, $wgScript, $wgServer, $wgRequest; - global $wgVariantArticlePath, $wgContLang; - if ( is_array( $query ) ) { - $query = wfArrayToCGI( $query ); - } + $query = self::fixUrlQueryArgs( $query, $query2 ); - if ( $this->isExternal() ) { - $url = $this->getFullURL(); - if ( $query ) { - // This is currently only used for edit section links in the - // context of interwiki transclusion. In theory we should - // append the query to the end of any existing query string, - // but interwiki transclusion is already broken in that case. - $url .= "?$query"; + $interwiki = self::getInterwikiLookup()->fetch( $this->mInterwiki ); + if ( $interwiki ) { + $namespace = $this->getNsText(); + if ( $namespace != '' ) { + # Can this actually happen? Interwikis shouldn't be parsed. + # Yes! It can in interwiki transclusion. But... it probably shouldn't. + $namespace .= ':'; } + $url = $interwiki->getURL( $namespace . $this->getDBkey() ); + $url = wfAppendQuery( $url, $query ); } else { $dbkey = wfUrlencode( $this->getPrefixedDBkey() ); if ( $query == '' ) { - if ( $variant != false && $wgContLang->hasVariants() ) { - if ( !$wgVariantArticlePath ) { - $variantArticlePath = "$wgScript?title=$1&variant=$2"; // default - } else { - $variantArticlePath = $wgVariantArticlePath; - } - $url = str_replace( '$2', urlencode( $variant ), $variantArticlePath ); - $url = str_replace( '$1', $dbkey, $url ); - } else { - $url = str_replace( '$1', $dbkey, $wgArticlePath ); - } + $url = str_replace( '$1', $dbkey, $wgArticlePath ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetLocalURL::Article', [ &$titleRef, &$url ] ); } else { - global $wgActionPaths; + global $wgVariantArticlePath, $wgActionPaths, $wgContLang; $url = false; - $matches = array(); - if ( !empty( $wgActionPaths ) && - preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) ) - { + $matches = []; + + if ( !empty( $wgActionPaths ) + && preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) + ) { $action = urldecode( $matches[2] ); if ( isset( $wgActionPaths[$action] ) ) { $query = $matches[1]; @@ -911,6 +1875,22 @@ class Title { } } } + + if ( $url === false + && $wgVariantArticlePath + && preg_match( '/^variant=([^&]*)$/', $query, $matches ) + && $this->getPageLanguage()->equals( $wgContLang ) + && $this->getPageLanguage()->hasVariants() + ) { + $variant = urldecode( $matches[1] ); + if ( $this->getPageLanguage()->hasVariant( $variant ) ) { + // Only do the variant replacement if the given variant is a valid + // variant for the page's language. + $url = str_replace( '$2', urlencode( $variant ), $wgVariantArticlePath ); + $url = str_replace( '$1', $dbkey, $url ); + } + } + if ( $url === false ) { if ( $query == '-' ) { $query = ''; @@ -918,14 +1898,19 @@ class Title { $url = "{$wgScript}?title={$dbkey}&{$query}"; } } + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetLocalURL::Internal', [ &$titleRef, &$url, $query ] ); - // FIXME: this causes breakage in various places when we + // @todo FIXME: This causes breakage in various places when we // actually expected a local URL and end up with dupe prefixes. if ( $wgRequest->getVal( 'action' ) == 'render' ) { $url = $wgServer . $url; } } - wfRunHooks( 'GetLocalURL', array( &$this, &$url, $query ) ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetLocalURL', [ &$titleRef, &$url, $query ] ); return $url; } @@ -939,72 +1924,78 @@ class Title { * The result obviously should not be URL-escaped, but does need to be * HTML-escaped if it's being output in HTML. * - * @param $query \type{\arrayof{\string}} An associative array of key => value pairs for the - * query string. Keys and values will be escaped. - * @param $variant \type{\string} Language variant of URL (for sr, zh..). Ignored - * for external links. Default is "false" (same variant as current page, - * for anonymous users). - * @return \type{\string} the URL - */ - public function getLinkUrl( $query = array(), $variant = false ) { - wfProfileIn( __METHOD__ ); - if ( $this->isExternal() ) { - $ret = $this->getFullURL( $query ); - } elseif ( $this->getPrefixedText() === '' && $this->getFragment() !== '' ) { + * @param string|string[] $query + * @param bool $query2 + * @param string|int|bool $proto A PROTO_* constant on how the URL should be expanded, + * or false (default) for no expansion + * @see self::getLocalURL for the arguments. + * @return string The URL + */ + public function getLinkURL( $query = '', $query2 = false, $proto = false ) { + if ( $this->isExternal() || $proto !== false ) { + $ret = $this->getFullURL( $query, $query2, $proto ); + } elseif ( $this->getPrefixedText() === '' && $this->hasFragment() ) { $ret = $this->getFragmentForURL(); } else { - $ret = $this->getLocalURL( $query, $variant ) . $this->getFragmentForURL(); + $ret = $this->getLocalURL( $query, $query2 ) . $this->getFragmentForURL(); } - wfProfileOut( __METHOD__ ); return $ret; } /** - * Get an HTML-escaped version of the URL form, suitable for - * using in a link, without a server name or fragment + * Get the URL form for an internal link. + * - Used in various CDN-related code, in case we have a different + * internal hostname for the server from the exposed one. * - * @param $query \type{\string} an optional query string - * @return \type{\string} the URL - */ - public function escapeLocalURL( $query = '' ) { - return htmlspecialchars( $this->getLocalURL( $query ) ); + * This uses $wgInternalServer to qualify the path, or $wgServer + * if $wgInternalServer is not set. If the server variable used is + * protocol-relative, the URL will be expanded to http:// + * + * @see self::getLocalURL for the arguments. + * @param string $query + * @param string|bool $query2 + * @return string The URL + */ + public function getInternalURL( $query = '', $query2 = false ) { + global $wgInternalServer, $wgServer; + $query = self::fixUrlQueryArgs( $query, $query2 ); + $server = $wgInternalServer !== false ? $wgInternalServer : $wgServer; + $url = wfExpandUrl( $server . $this->getLocalURL( $query ), PROTO_HTTP ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetInternalURL', [ &$titleRef, &$url, $query ] ); + return $url; } /** - * Get an HTML-escaped version of the URL form, suitable for - * using in a link, including the server name and fragment + * Get the URL for a canonical link, for use in things like IRC and + * e-mail notifications. Uses $wgCanonicalServer and the + * GetCanonicalURL hook. * - * @param $query \type{\string} an optional query string - * @return \type{\string} the URL - */ - public function escapeFullURL( $query = '' ) { - return htmlspecialchars( $this->getFullURL( $query ) ); - } - - /** - * Get the URL form for an internal link. - * - Used in various Squid-related code, in case we have a different - * internal hostname for the server from the exposed one. + * NOTE: Unlike getInternalURL(), the canonical URL includes the fragment * - * @param $query \type{\string} an optional query string - * @param $variant \type{\string} language variant of url (for sr, zh..) - * @return \type{\string} the URL + * @see self::getLocalURL for the arguments. + * @param string $query + * @param string|bool $query2 + * @return string The URL + * @since 1.18 */ - public function getInternalURL( $query = '', $variant = false ) { - global $wgInternalServer; - $url = $wgInternalServer . $this->getLocalURL( $query, $variant ); - wfRunHooks( 'GetInternalURL', array( &$this, &$url, $query ) ); + public function getCanonicalURL( $query = '', $query2 = false ) { + $query = self::fixUrlQueryArgs( $query, $query2 ); + $url = wfExpandUrl( $this->getLocalURL( $query ) . $this->getFragmentForURL(), PROTO_CANONICAL ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + Hooks::run( 'GetCanonicalURL', [ &$titleRef, &$url, $query ] ); return $url; } /** * Get the edit URL for this Title * - * @return \type{\string} the URL, or a null string if this is an - * interwiki link + * @return string The URL, or a null string if this is an interwiki link */ public function getEditURL() { - if ( $this->mInterwiki != '' ) { + if ( $this->isExternal() ) { return ''; } $s = $this->getLocalURL( 'action=edit' ); @@ -1013,119 +2004,7 @@ class Title { } /** - * Get the HTML-escaped displayable text form. - * Used for the title field in tags. - * - * @return \type{\string} the text, including any prefixes - */ - public function getEscapedText() { - return htmlspecialchars( $this->getPrefixedText() ); - } - - /** - * Is this Title interwiki? - * - * @return \type{\bool} - */ - public function isExternal() { - return ( $this->mInterwiki != '' ); - } - - /** - * Is this page "semi-protected" - the *only* protection is autoconfirm? - * - * @param $action \type{\string} Action to check (default: edit) - * @return \type{\bool} - */ - public function isSemiProtected( $action = 'edit' ) { - if ( $this->exists() ) { - $restrictions = $this->getRestrictions( $action ); - if ( count( $restrictions ) > 0 ) { - foreach ( $restrictions as $restriction ) { - if ( strtolower( $restriction ) != 'autoconfirmed' ) { - return false; - } - } - } else { - # Not protected - return false; - } - return true; - } else { - # If it doesn't exist, it can't be protected - return false; - } - } - - /** - * Does the title correspond to a protected article? - * - * @param $action \type{\string} the action the page is protected from, - * by default checks all actions. - * @return \type{\bool} - */ - public function isProtected( $action = '' ) { - global $wgRestrictionLevels; - - $restrictionTypes = $this->getRestrictionTypes(); - - # Special pages have inherent protection - if( $this->getNamespace() == NS_SPECIAL ) { - return true; - } - - # Check regular protection levels - foreach ( $restrictionTypes as $type ) { - if ( $action == $type || $action == '' ) { - $r = $this->getRestrictions( $type ); - foreach ( $wgRestrictionLevels as $level ) { - if ( in_array( $level, $r ) && $level != '' ) { - return true; - } - } - } - } - - return false; - } - - /** - * Is this a conversion table for the LanguageConverter? - * - * @return \type{\bool} - */ - public function isConversionTable() { - if( - $this->getNamespace() == NS_MEDIAWIKI && - strpos( $this->getText(), 'Conversiontable' ) !== false - ) - { - return true; - } - - return false; - } - - /** - * Is $wgUser watching this page? - * - * @return \type{\bool} - */ - public function userIsWatching() { - global $wgUser; - - if ( is_null( $this->mWatched ) ) { - if ( NS_SPECIAL == $this->mNamespace || !$wgUser->isLoggedIn() ) { - $this->mWatched = false; - } else { - $this->mWatched = $wgUser->isWatched( $this ); - } - } - return $this->mWatched; - } - - /** - * Can $wgUser perform $action on this page? + * Can $user perform $action on this page? * This skips potentially expensive cascading permission checks * as well as avoids expensive error formatting * @@ -1134,62 +2013,60 @@ class Title { * * May provide false positives, but should never provide a false negative. * - * @param $action \type{\string} action that permission needs to be checked for - * @return \type{\bool} + * @param string $action Action that permission needs to be checked for + * @param User $user User to check (since 1.19); $wgUser will be used if not provided. + * @return bool */ - public function quickUserCan( $action ) { - return $this->userCan( $action, false ); + public function quickUserCan( $action, $user = null ) { + return $this->userCan( $action, $user, false ); } /** - * Determines if $wgUser is unable to edit this page because it has been protected - * by $wgNamespaceProtection. + * Can $user perform $action on this page? * - * @return \type{\bool} + * @param string $action Action that permission needs to be checked for + * @param User $user User to check (since 1.19); $wgUser will be used if not + * provided. + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @return bool */ - public function isNamespaceProtected() { - global $wgNamespaceProtection, $wgUser; - if ( isset( $wgNamespaceProtection[$this->mNamespace] ) ) { - foreach ( (array)$wgNamespaceProtection[$this->mNamespace] as $right ) { - if ( $right != '' && !$wgUser->isAllowed( $right ) ) { - return true; - } - } + public function userCan( $action, $user = null, $rigor = 'secure' ) { + if ( !$user instanceof User ) { + global $wgUser; + $user = $wgUser; } - return false; - } - /** - * Can $wgUser perform $action on this page? - * - * @param $action \type{\string} action that permission needs to be checked for - * @param $doExpensiveQueries \type{\bool} Set this to false to avoid doing unnecessary queries. - * @return \type{\bool} - */ - public function userCan( $action, $doExpensiveQueries = true ) { - global $wgUser; - return ( $this->getUserPermissionsErrorsInternal( $action, $wgUser, $doExpensiveQueries, true ) === array() ); + return !count( $this->getUserPermissionsErrorsInternal( $action, $user, $rigor, true ) ); } /** * Can $user perform $action on this page? * - * FIXME: This *does not* check throttles (User::pingLimiter()). + * @todo FIXME: This *does not* check throttles (User::pingLimiter()). * - * @param $action \type{\string}action that permission needs to be checked for - * @param $user \type{User} user to check - * @param $doExpensiveQueries \type{\bool} Set this to false to avoid doing unnecessary queries. - * @param $ignoreErrors \type{\arrayof{\string}} Set this to a list of message keys whose corresponding errors may be ignored. - * @return \type{\array} Array of arrays of the arguments to wfMsg to explain permissions problems. + * @param string $action Action that permission needs to be checked for + * @param User $user User to check + * @param string $rigor One of (quick,full,secure) + * - quick : does cheap permission checks from replica DBs (usable for GUI creation) + * - full : does cheap and expensive checks possibly from a replica DB + * - secure : does cheap and expensive checks, using the master as needed + * @param array $ignoreErrors Array of Strings Set this to a list of message keys + * whose corresponding errors may be ignored. + * @return array Array of arrays of the arguments to wfMessage to explain permissions problems. */ - public function getUserPermissionsErrors( $action, $user, $doExpensiveQueries = true, $ignoreErrors = array() ) { - $errors = $this->getUserPermissionsErrorsInternal( $action, $user, $doExpensiveQueries ); + public function getUserPermissionsErrors( + $action, $user, $rigor = 'secure', $ignoreErrors = [] + ) { + $errors = $this->getUserPermissionsErrorsInternal( $action, $user, $rigor ); // Remove the errors being ignored. foreach ( $errors as $index => $error ) { - $error_key = is_array( $error ) ? $error[0] : $error; + $errKey = is_array( $error ) ? $error[0] : $error; - if ( in_array( $error_key, $ignoreErrors ) ) { + if ( in_array( $errKey, $ignoreErrors ) ) { + unset( $errors[$index] ); + } + if ( $errKey instanceof MessageSpecifier && in_array( $errKey->getKey(), $ignoreErrors ) ) { unset( $errors[$index] ); } } @@ -1200,78 +2077,71 @@ class Title { /** * Permissions checks that fail most often, and which are easiest to test. * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkQuickPermissions( $action, $user, $errors, $doExpensiveQueries, $short ) { + private function checkQuickPermissions( $action, $user, $errors, $rigor, $short ) { + if ( !Hooks::run( 'TitleQuickPermissions', + [ $this, $user, $action, &$errors, ( $rigor !== 'quick' ), $short ] ) + ) { + return $errors; + } + if ( $action == 'create' ) { - if ( ( $this->isTalkPage() && !$user->isAllowed( 'createtalk' ) ) || - ( !$this->isTalkPage() && !$user->isAllowed( 'createpage' ) ) ) { - $errors[] = $user->isAnon() ? array( 'nocreatetext' ) : array( 'nocreate-loggedin' ); + if ( + ( $this->isTalkPage() && !$user->isAllowed( 'createtalk' ) ) || + ( !$this->isTalkPage() && !$user->isAllowed( 'createpage' ) ) + ) { + $errors[] = $user->isAnon() ? [ 'nocreatetext' ] : [ 'nocreate-loggedin' ]; } } elseif ( $action == 'move' ) { if ( !$user->isAllowed( 'move-rootuserpages' ) && $this->mNamespace == NS_USER && !$this->isSubpage() ) { // Show user page-specific message only if the user can move other pages - $errors[] = array( 'cant-move-user-page' ); + $errors[] = [ 'cant-move-user-page' ]; } // Check if user is allowed to move files if it's a file if ( $this->mNamespace == NS_FILE && !$user->isAllowed( 'movefile' ) ) { - $errors[] = array( 'movenotallowedfile' ); + $errors[] = [ 'movenotallowedfile' ]; + } + + // Check if user is allowed to move category pages if it's a category page + if ( $this->mNamespace == NS_CATEGORY && !$user->isAllowed( 'move-categorypages' ) ) { + $errors[] = [ 'cant-move-category-page' ]; } if ( !$user->isAllowed( 'move' ) ) { // User can't move anything - global $wgGroupPermissions; - $userCanMove = false; - if ( isset( $wgGroupPermissions['user']['move'] ) ) { - $userCanMove = $wgGroupPermissions['user']['move']; - } - $autoconfirmedCanMove = false; - if ( isset( $wgGroupPermissions['autoconfirmed']['move'] ) ) { - $autoconfirmedCanMove = $wgGroupPermissions['autoconfirmed']['move']; - } + $userCanMove = User::groupHasPermission( 'user', 'move' ); + $autoconfirmedCanMove = User::groupHasPermission( 'autoconfirmed', 'move' ); if ( $user->isAnon() && ( $userCanMove || $autoconfirmedCanMove ) ) { // custom message if logged-in users without any special rights can move - $errors[] = array( 'movenologintext' ); + $errors[] = [ 'movenologintext' ]; } else { - $errors[] = array( 'movenotallowed' ); + $errors[] = [ 'movenotallowed' ]; } } } elseif ( $action == 'move-target' ) { if ( !$user->isAllowed( 'move' ) ) { // User can't move anything - $errors[] = array( 'movenotallowed' ); + $errors[] = [ 'movenotallowed' ]; } elseif ( !$user->isAllowed( 'move-rootuserpages' ) && $this->mNamespace == NS_USER && !$this->isSubpage() ) { // Show user page-specific message only if the user can move other pages - $errors[] = array( 'cant-move-to-user-page' ); + $errors[] = [ 'cant-move-to-user-page' ]; + } elseif ( !$user->isAllowed( 'move-categorypages' ) + && $this->mNamespace == NS_CATEGORY ) { + // Show category page-specific message only if the user can move other pages + $errors[] = [ 'cant-move-to-category-page' ]; } } elseif ( !$user->isAllowed( $action ) ) { - // We avoid expensive display logic for quickUserCan's and such - $groups = false; - if ( !$short ) { - $groups = array_map( array( 'User', 'makeGroupLinkWiki' ), - User::getGroupsWithPermission( $action ) ); - } - - if ( $groups ) { - global $wgLang; - $return = array( - 'badaccess-groups', - $wgLang->commaList( $groups ), - count( $groups ) - ); - } else { - $return = array( 'badaccess-group0' ); - } - $errors[] = $return; + $errors[] = $this->missingPermissionError( $action, $short ); } return $errors; @@ -1280,24 +2150,27 @@ class Title { /** * Add the resulting error code to the errors array * - * @param $errors Array list of current errors - * @param $result Mixed result of errors + * @param array $errors List of current errors + * @param array $result Result of errors * - * @return Array list of errors + * @return array List of errors */ private function resultToError( $errors, $result ) { if ( is_array( $result ) && count( $result ) && !is_array( $result[0] ) ) { // A single array representing an error $errors[] = $result; - } else if ( is_array( $result ) && is_array( $result[0] ) ) { + } elseif ( is_array( $result ) && is_array( $result[0] ) ) { // A nested array representing multiple errors $errors = array_merge( $errors, $result ); - } else if ( $result !== '' && is_string( $result ) ) { + } elseif ( $result !== '' && is_string( $result ) ) { // A string representing a message-id - $errors[] = array( $result ); - } else if ( $result === false ) { + $errors[] = [ $result ]; + } elseif ( $result instanceof MessageSpecifier ) { + // A message specifier representing an error + $errors[] = [ $result ]; + } elseif ( $result === false ) { // a generic "We don't want them to do that" - $errors[] = array( 'badaccess-group0' ); + $errors[] = [ 'badaccess-group0' ]; } return $errors; } @@ -1305,27 +2178,34 @@ class Title { /** * Check various permission hooks * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkPermissionHooks( $action, $user, $errors, $doExpensiveQueries, $short ) { + private function checkPermissionHooks( $action, $user, $errors, $rigor, $short ) { // Use getUserPermissionsErrors instead $result = ''; - if ( !wfRunHooks( 'userCan', array( &$this, &$user, $action, &$result ) ) ) { - return $result ? array() : array( array( 'badaccess-group0' ) ); + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + if ( !Hooks::run( 'userCan', [ &$titleRef, &$user, $action, &$result ] ) ) { + return $result ? [] : [ [ 'badaccess-group0' ] ]; } // Check getUserPermissionsErrors hook - if ( !wfRunHooks( 'getUserPermissionsErrors', array( &$this, &$user, $action, &$result ) ) ) { + // Avoid PHP 7.1 warning from passing $this by reference + $titleRef = $this; + if ( !Hooks::run( 'getUserPermissionsErrors', [ &$titleRef, &$user, $action, &$result ] ) ) { $errors = $this->resultToError( $errors, $result ); } // Check getUserPermissionsErrorsExpensive hook - if ( $doExpensiveQueries && !( $short && count( $errors ) > 0 ) && - !wfRunHooks( 'getUserPermissionsErrorsExpensive', array( &$this, &$user, $action, &$result ) ) ) { + if ( + $rigor !== 'quick' + && !( $short && count( $errors ) > 0 ) + && !Hooks::run( 'getUserPermissionsErrorsExpensive', [ &$titleRef, &$user, $action, &$result ] ) + ) { $errors = $this->resultToError( $errors, $result ); } @@ -1335,28 +2215,27 @@ class Title { /** * Check permissions on special pages & namespaces * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkSpecialsAndNSPermissions( $action, $user, $errors, $doExpensiveQueries, $short ) { - # Only 'createaccount' and 'execute' can be performed on - # special pages, which don't actually exist in the DB. - $specialOKActions = array( 'createaccount', 'execute' ); - if ( NS_SPECIAL == $this->mNamespace && !in_array( $action, $specialOKActions ) ) { - $errors[] = array( 'ns-specialprotected' ); + private function checkSpecialsAndNSPermissions( $action, $user, $errors, $rigor, $short ) { + # Only 'createaccount' can be performed on special pages, + # which don't actually exist in the DB. + if ( $this->isSpecialPage() && $action !== 'createaccount' ) { + $errors[] = [ 'ns-specialprotected' ]; } # Check $wgNamespaceProtection for restricted namespaces - if ( $this->isNamespaceProtected() ) { + if ( $this->isNamespaceProtected( $user ) ) { $ns = $this->mNamespace == NS_MAIN ? - wfMsg( 'nstab-main' ) : $this->getNsText(); + wfMessage( 'nstab-main' )->text() : $this->getNsText(); $errors[] = $this->mNamespace == NS_MEDIAWIKI ? - array( 'protectedinterface' ) : array( 'namespaceprotected', $ns ); + [ 'protectedinterface', $action ] : [ 'namespaceprotected', $ns, $action ]; } return $errors; @@ -1365,26 +2244,30 @@ class Title { /** * Check CSS/JS sub-page permissions * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkCSSandJSPermissions( $action, $user, $errors, $doExpensiveQueries, $short ) { + private function checkCSSandJSPermissions( $action, $user, $errors, $rigor, $short ) { # Protect css/js subpages of user pages # XXX: this might be better using restrictions - # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssSubpage() - # and $this->userCanEditJsSubpage() from working - # XXX: right 'editusercssjs' is deprecated, for backward compatibility only - if ( $action != 'patrol' && !$user->isAllowed( 'editusercssjs' ) - && !preg_match( '/^' . preg_quote( $user->getName(), '/' ) . '\//', $this->mTextform ) ) { - if ( $this->isCssSubpage() && !$user->isAllowed( 'editusercss' ) ) { - $errors[] = array( 'customcssjsprotected' ); - } else if ( $this->isJsSubpage() && !$user->isAllowed( 'edituserjs' ) ) { - $errors[] = array( 'customcssjsprotected' ); + if ( $action != 'patrol' ) { + if ( preg_match( '/^' . preg_quote( $user->getName(), '/' ) . '\//', $this->mTextform ) ) { + if ( $this->isCssSubpage() && !$user->isAllowedAny( 'editmyusercss', 'editusercss' ) ) { + $errors[] = [ 'mycustomcssprotected', $action ]; + } elseif ( $this->isJsSubpage() && !$user->isAllowedAny( 'editmyuserjs', 'edituserjs' ) ) { + $errors[] = [ 'mycustomjsprotected', $action ]; + } + } else { + if ( $this->isCssSubpage() && !$user->isAllowed( 'editusercss' ) ) { + $errors[] = [ 'customcssprotected', $action ]; + } elseif ( $this->isJsSubpage() && !$user->isAllowed( 'edituserjs' ) ) { + $errors[] = [ 'customjsprotected', $action ]; + } } } @@ -1396,31 +2279,31 @@ class Title { * page. The user must possess all required rights for this * action. * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkPageRestrictions( $action, $user, $errors, $doExpensiveQueries, $short ) { + private function checkPageRestrictions( $action, $user, $errors, $rigor, $short ) { foreach ( $this->getRestrictions( $action ) as $right ) { - // Backwards compatibility, rewrite sysop -> protect + // Backwards compatibility, rewrite sysop -> editprotected if ( $right == 'sysop' ) { - $right = 'protect'; + $right = 'editprotected'; } - if ( $right != '' && !$user->isAllowed( $right ) ) { - // Users with 'editprotected' permission can edit protected pages - if ( $action == 'edit' && $user->isAllowed( 'editprotected' ) ) { - // Users with 'editprotected' permission cannot edit protected pages - // with cascading option turned on. - if ( $this->mCascadeRestriction ) { - $errors[] = array( 'protectedpagetext', $right ); - } - } else { - $errors[] = array( 'protectedpagetext', $right ); - } + // Backwards compatibility, rewrite autoconfirmed -> editsemiprotected + if ( $right == 'autoconfirmed' ) { + $right = 'editsemiprotected'; + } + if ( $right == '' ) { + continue; + } + if ( !$user->isAllowed( $right ) ) { + $errors[] = [ 'protectedpagetext', $right, $action ]; + } elseif ( $this->mCascadeRestriction && !$user->isAllowed( 'protect' ) ) { + $errors[] = [ 'protectedpagetext', 'protect', $action ]; } } @@ -1429,17 +2312,17 @@ class Title { /** * Check restrictions on cascading pages. - * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error * - * @return Array list of errors + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error + * + * @return array List of errors */ - private function checkCascadingSourcesRestrictions( $action, $user, $errors, $doExpensiveQueries, $short ) { - if ( $doExpensiveQueries && !$this->isCssJsSubpage() ) { + private function checkCascadingSourcesRestrictions( $action, $user, $errors, $rigor, $short ) { + if ( $rigor !== 'quick' && !$this->isCssJsSubpage() ) { # We /could/ use the protection level on the source page, but it's # fairly ugly as we have to establish a precedence hierarchy for pages # included by multiple cascade-protected pages. So just restrict @@ -1452,12 +2335,20 @@ class Title { # This is only for protection restrictions, not for all actions if ( isset( $restrictions[$action] ) ) { foreach ( $restrictions[$action] as $right ) { - $right = ( $right == 'sysop' ) ? 'protect' : $right; - if ( $right != '' && !$user->isAllowed( $right ) ) { + // Backwards compatibility, rewrite sysop -> editprotected + if ( $right == 'sysop' ) { + $right = 'editprotected'; + } + // Backwards compatibility, rewrite autoconfirmed -> editsemiprotected + if ( $right == 'autoconfirmed' ) { + $right = 'editsemiprotected'; + } + if ( $right != '' && !$user->isAllowedAll( 'protect', $right ) ) { $pages = ''; - foreach ( $cascadingSources as $page ) + foreach ( $cascadingSources as $page ) { $pages .= '* [[:' . $page->getPrefixedText() . "]]\n"; - $errors[] = array( 'cascadeprotected', count( $cascadingSources ), $pages ); + } + $errors[] = [ 'cascadeprotected', count( $cascadingSources ), $pages, $action ]; } } } @@ -1469,167 +2360,364 @@ class Title { /** * Check action permissions not already checked in checkQuickPermissions * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error * - * @return Array list of errors + * @return array List of errors */ - private function checkActionPermissions( $action, $user, $errors, $doExpensiveQueries, $short ) { + private function checkActionPermissions( $action, $user, $errors, $rigor, $short ) { + global $wgDeleteRevisionsLimit, $wgLang; + if ( $action == 'protect' ) { - if ( $this->getUserPermissionsErrors( 'edit', $user ) != array() ) { + if ( count( $this->getUserPermissionsErrorsInternal( 'edit', $user, $rigor, true ) ) ) { // If they can't edit, they shouldn't protect. - $errors[] = array( 'protect-cantedit' ); + $errors[] = [ 'protect-cantedit' ]; } } elseif ( $action == 'create' ) { $title_protection = $this->getTitleProtection(); - if( $title_protection ) { - if( $title_protection['pt_create_perm'] == 'sysop' ) { - $title_protection['pt_create_perm'] = 'protect'; // B/C - } - if( $title_protection['pt_create_perm'] == '' || !$user->isAllowed( $title_protection['pt_create_perm'] ) ) { - $errors[] = array( 'titleprotected', User::whoIs( $title_protection['pt_user'] ), $title_protection['pt_reason'] ); + if ( $title_protection ) { + if ( $title_protection['permission'] == '' + || !$user->isAllowed( $title_protection['permission'] ) + ) { + $errors[] = [ + 'titleprotected', + User::whoIs( $title_protection['user'] ), + $title_protection['reason'] + ]; } } } elseif ( $action == 'move' ) { // Check for immobile pages if ( !MWNamespace::isMovable( $this->mNamespace ) ) { // Specific message for this case - $errors[] = array( 'immobile-source-namespace', $this->getNsText() ); + $errors[] = [ 'immobile-source-namespace', $this->getNsText() ]; } elseif ( !$this->isMovable() ) { // Less specific message for rarer cases - $errors[] = array( 'immobile-page' ); + $errors[] = [ 'immobile-source-page' ]; } } elseif ( $action == 'move-target' ) { if ( !MWNamespace::isMovable( $this->mNamespace ) ) { - $errors[] = array( 'immobile-target-namespace', $this->getNsText() ); + $errors[] = [ 'immobile-target-namespace', $this->getNsText() ]; } elseif ( !$this->isMovable() ) { - $errors[] = array( 'immobile-target-page' ); + $errors[] = [ 'immobile-target-page' ]; + } + } elseif ( $action == 'delete' ) { + $tempErrors = $this->checkPageRestrictions( 'edit', $user, [], $rigor, true ); + if ( !$tempErrors ) { + $tempErrors = $this->checkCascadingSourcesRestrictions( 'edit', + $user, $tempErrors, $rigor, true ); + } + if ( $tempErrors ) { + // If protection keeps them from editing, they shouldn't be able to delete. + $errors[] = [ 'deleteprotected' ]; + } + if ( $rigor !== 'quick' && $wgDeleteRevisionsLimit + && !$this->userCan( 'bigdelete', $user ) && $this->isBigDeletion() + ) { + $errors[] = [ 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ]; + } + } elseif ( $action === 'undelete' ) { + if ( count( $this->getUserPermissionsErrorsInternal( 'edit', $user, $rigor, true ) ) ) { + // Undeleting implies editing + $errors[] = [ 'undelete-cantedit' ]; + } + if ( !$this->exists() + && count( $this->getUserPermissionsErrorsInternal( 'create', $user, $rigor, true ) ) + ) { + // Undeleting where nothing currently exists implies creating + $errors[] = [ 'undelete-cantcreate' ]; + } + } + return $errors; + } + + /** + * Check that the user isn't blocked from editing. + * + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error + * + * @return array List of errors + */ + private function checkUserBlock( $action, $user, $errors, $rigor, $short ) { + global $wgEmailConfirmToEdit, $wgBlockDisablesLogin; + // Account creation blocks handled at userlogin. + // Unblocking handled in SpecialUnblock + if ( $rigor === 'quick' || in_array( $action, [ 'createaccount', 'unblock' ] ) ) { + return $errors; + } + + // Optimize for a very common case + if ( $action === 'read' && !$wgBlockDisablesLogin ) { + return $errors; + } + + if ( $wgEmailConfirmToEdit + && !$user->isEmailConfirmed() + && $action === 'edit' + ) { + $errors[] = [ 'confirmedittext' ]; + } + + $useSlave = ( $rigor !== 'secure' ); + if ( ( $action == 'edit' || $action == 'create' ) + && !$user->isBlockedFrom( $this, $useSlave ) + ) { + // Don't block the user from editing their own talk page unless they've been + // explicitly blocked from that too. + } elseif ( $user->isBlocked() && $user->getBlock()->prevents( $action ) !== false ) { + // @todo FIXME: Pass the relevant context into this function. + $errors[] = $user->getBlock()->getPermissionsError( RequestContext::getMain() ); + } + + return $errors; + } + + /** + * Check that the user is allowed to read this page. + * + * @param string $action The action to check + * @param User $user User to check + * @param array $errors List of current errors + * @param string $rigor Same format as Title::getUserPermissionsErrors() + * @param bool $short Short circuit on first error + * + * @return array List of errors + */ + private function checkReadPermissions( $action, $user, $errors, $rigor, $short ) { + global $wgWhitelistRead, $wgWhitelistReadRegexp; + + $whitelisted = false; + if ( User::isEveryoneAllowed( 'read' ) ) { + # Shortcut for public wikis, allows skipping quite a bit of code + $whitelisted = true; + } elseif ( $user->isAllowed( 'read' ) ) { + # If the user is allowed to read pages, he is allowed to read all pages + $whitelisted = true; + } elseif ( $this->isSpecial( 'Userlogin' ) + || $this->isSpecial( 'PasswordReset' ) + || $this->isSpecial( 'Userlogout' ) + ) { + # Always grant access to the login page. + # Even anons need to be able to log in. + $whitelisted = true; + } elseif ( is_array( $wgWhitelistRead ) && count( $wgWhitelistRead ) ) { + # Time to check the whitelist + # Only do these checks is there's something to check against + $name = $this->getPrefixedText(); + $dbName = $this->getPrefixedDBkey(); + + // Check for explicit whitelisting with and without underscores + if ( in_array( $name, $wgWhitelistRead, true ) || in_array( $dbName, $wgWhitelistRead, true ) ) { + $whitelisted = true; + } elseif ( $this->getNamespace() == NS_MAIN ) { + # Old settings might have the title prefixed with + # a colon for main-namespace pages + if ( in_array( ':' . $name, $wgWhitelistRead ) ) { + $whitelisted = true; + } + } elseif ( $this->isSpecialPage() ) { + # If it's a special page, ditch the subpage bit and check again + $name = $this->getDBkey(); + list( $name, /* $subpage */ ) = SpecialPageFactory::resolveAlias( $name ); + if ( $name ) { + $pure = SpecialPage::getTitleFor( $name )->getPrefixedText(); + if ( in_array( $pure, $wgWhitelistRead, true ) ) { + $whitelisted = true; + } + } + } + } + + if ( !$whitelisted && is_array( $wgWhitelistReadRegexp ) && !empty( $wgWhitelistReadRegexp ) ) { + $name = $this->getPrefixedText(); + // Check for regex whitelisting + foreach ( $wgWhitelistReadRegexp as $listItem ) { + if ( preg_match( $listItem, $name ) ) { + $whitelisted = true; + break; + } } } - return $errors; + + if ( !$whitelisted ) { + # If the title is not whitelisted, give extensions a chance to do so... + Hooks::run( 'TitleReadWhitelist', [ $this, $user, &$whitelisted ] ); + if ( !$whitelisted ) { + $errors[] = $this->missingPermissionError( $action, $short ); + } + } + + return $errors; + } + + /** + * Get a description array when the user doesn't have the right to perform + * $action (i.e. when User::isAllowed() returns false) + * + * @param string $action The action to check + * @param bool $short Short circuit on first error + * @return array Array containing an error message key and any parameters + */ + private function missingPermissionError( $action, $short ) { + // We avoid expensive display logic for quickUserCan's and such + if ( $short ) { + return [ 'badaccess-group0' ]; + } + + return User::newFatalPermissionDeniedStatus( $action )->getErrorsArray()[0]; + } + + /** + * Can $user perform $action on this page? This is an internal function, + * with multiple levels of checks depending on performance needs; see $rigor below. + * It does not check wfReadOnly(). + * + * @param string $action Action that permission needs to be checked for + * @param User $user User to check + * @param string $rigor One of (quick,full,secure) + * - quick : does cheap permission checks from replica DBs (usable for GUI creation) + * - full : does cheap and expensive checks possibly from a replica DB + * - secure : does cheap and expensive checks, using the master as needed + * @param bool $short Set this to true to stop after the first permission error. + * @return array Array of arrays of the arguments to wfMessage to explain permissions problems. + */ + protected function getUserPermissionsErrorsInternal( + $action, $user, $rigor = 'secure', $short = false + ) { + if ( $rigor === true ) { + $rigor = 'secure'; // b/c + } elseif ( $rigor === false ) { + $rigor = 'quick'; // b/c + } elseif ( !in_array( $rigor, [ 'quick', 'full', 'secure' ] ) ) { + throw new Exception( "Invalid rigor parameter '$rigor'." ); + } + + # Read has special handling + if ( $action == 'read' ) { + $checks = [ + 'checkPermissionHooks', + 'checkReadPermissions', + 'checkUserBlock', // for wgBlockDisablesLogin + ]; + # Don't call checkSpecialsAndNSPermissions or checkCSSandJSPermissions + # here as it will lead to duplicate error messages. This is okay to do + # since anywhere that checks for create will also check for edit, and + # those checks are called for edit. + } elseif ( $action == 'create' ) { + $checks = [ + 'checkQuickPermissions', + 'checkPermissionHooks', + 'checkPageRestrictions', + 'checkCascadingSourcesRestrictions', + 'checkActionPermissions', + 'checkUserBlock' + ]; + } else { + $checks = [ + 'checkQuickPermissions', + 'checkPermissionHooks', + 'checkSpecialsAndNSPermissions', + 'checkCSSandJSPermissions', + 'checkPageRestrictions', + 'checkCascadingSourcesRestrictions', + 'checkActionPermissions', + 'checkUserBlock' + ]; + } + + $errors = []; + while ( count( $checks ) > 0 && + !( $short && count( $errors ) > 0 ) ) { + $method = array_shift( $checks ); + $errors = $this->$method( $action, $user, $errors, $rigor, $short ); + } + + return $errors; + } + + /** + * Get a filtered list of all restriction types supported by this wiki. + * @param bool $exists True to get all restriction types that apply to + * titles that do exist, False for all restriction types that apply to + * titles that do not exist + * @return array + */ + public static function getFilteredRestrictionTypes( $exists = true ) { + global $wgRestrictionTypes; + $types = $wgRestrictionTypes; + if ( $exists ) { + # Remove the create restriction for existing titles + $types = array_diff( $types, [ 'create' ] ); + } else { + # Only the create and upload restrictions apply to non-existing titles + $types = array_intersect( $types, [ 'create', 'upload' ] ); + } + return $types; } /** - * Check that the user isn't blocked from editting. - * - * @param $action String the action to check - * @param $user User user to check - * @param $errors Array list of current errors - * @param $doExpensiveQueries Boolean whether or not to perform expensive queries - * @param $short Boolean short circuit on first error + * Returns restriction types for the current Title * - * @return Array list of errors + * @return array Applicable restriction types */ - private function checkUserBlock( $action, $user, $errors, $doExpensiveQueries, $short ) { - if( $short && count( $errors ) > 0 ) { - return $errors; + public function getRestrictionTypes() { + if ( $this->isSpecialPage() ) { + return []; } - global $wgContLang, $wgLang, $wgEmailConfirmToEdit; + $types = self::getFilteredRestrictionTypes( $this->exists() ); - if ( $wgEmailConfirmToEdit && !$user->isEmailConfirmed() && $action != 'createaccount' ) { - $errors[] = array( 'confirmedittext' ); + if ( $this->getNamespace() != NS_FILE ) { + # Remove the upload restriction for non-file titles + $types = array_diff( $types, [ 'upload' ] ); } - // Edit blocks should not affect reading. Account creation blocks handled at userlogin. - if ( $action != 'read' && $action != 'createaccount' && $user->isBlockedFrom( $this ) ) { - $block = $user->mBlock; - - // This is from OutputPage::blockedPage - // Copied at r23888 by werdna - - $id = $user->blockedBy(); - $reason = $user->blockedFor(); - if ( $reason == '' ) { - $reason = wfMsg( 'blockednoreason' ); - } - $ip = wfGetIP(); - - if ( is_numeric( $id ) ) { - $name = User::whoIs( $id ); - } else { - $name = $id; - } - - $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]"; - $blockid = $block->mId; - $blockExpiry = $user->mBlock->mExpiry; - $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $user->mBlock->mTimestamp ), true ); - if ( $blockExpiry == 'infinity' ) { - // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite' - $scBlockExpiryOptions = wfMsg( 'ipboptions' ); - - foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) { - if ( !strpos( $option, ':' ) ) - continue; - - list( $show, $value ) = explode( ':', $option ); - - if ( $value == 'infinite' || $value == 'indefinite' ) { - $blockExpiry = $show; - break; - } - } - } else { - $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true ); - } + Hooks::run( 'TitleGetRestrictionTypes', [ $this, &$types ] ); - $intended = $user->mBlock->mAddress; + wfDebug( __METHOD__ . ': applicable restrictions to [[' . + $this->getPrefixedText() . ']] are {' . implode( ',', $types ) . "}\n" ); - $errors[] = array( ( $block->mAuto ? 'autoblockedtext' : 'blockedtext' ), $link, $reason, $ip, $name, - $blockid, $blockExpiry, $intended, $blockTimestamp ); - } - - return $errors; + return $types; } /** - * Can $user perform $action on this page? This is an internal function, - * which checks ONLY that previously checked by userCan (i.e. it leaves out - * checks on wfReadOnly() and blocks) - * - * @param $action \type{\string} action that permission needs to be checked for - * @param $user \type{User} user to check - * @param $doExpensiveQueries \type{\bool} Set this to false to avoid doing unnecessary queries. - * @param $short \type{\bool} Set this to true to stop after the first permission error. - * @return \type{\array} Array of arrays of the arguments to wfMsg to explain permissions problems. - */ - protected function getUserPermissionsErrorsInternal( $action, $user, $doExpensiveQueries = true, $short = false ) { - wfProfileIn( __METHOD__ ); - - $errors = array(); - $checks = array( - 'checkQuickPermissions', - 'checkPermissionHooks', - 'checkSpecialsAndNSPermissions', - 'checkCSSandJSPermissions', - 'checkPageRestrictions', - 'checkCascadingSourcesRestrictions', - 'checkActionPermissions', - 'checkUserBlock' - ); - - while( count( $checks ) > 0 && - !( $short && count( $errors ) > 0 ) ) { - $method = array_shift( $checks ); - $errors = $this->$method( $action, $user, $errors, $doExpensiveQueries, $short ); + * Is this title subject to title protection? + * Title protection is the one applied against creation of such title. + * + * @return array|bool An associative array representing any existent title + * protection, or false if there's none. + */ + public function getTitleProtection() { + $protection = $this->getTitleProtectionInternal(); + if ( $protection ) { + if ( $protection['permission'] == 'sysop' ) { + $protection['permission'] = 'editprotected'; // B/C + } + if ( $protection['permission'] == 'autoconfirmed' ) { + $protection['permission'] = 'editsemiprotected'; // B/C + } } - - wfProfileOut( __METHOD__ ); - return $errors; + return $protection; } /** - * Is this title subject to title protection? - * Title protection is the one applied against creation of such title. + * Fetch title protection settings * - * @return \type{\mixed} An associative array representing any existent title - * protection, or false if there's none. + * To work correctly, $this->loadRestrictions() needs to have access to the + * actual protections in the database without munging 'sysop' => + * 'editprotected' and 'autoconfirmed' => 'editsemiprotected'. Other + * callers probably want $this->getTitleProtection() instead. + * + * @return array|bool */ - private function getTitleProtection() { + protected function getTitleProtectionInternal() { // Can't protect pages in special namespaces if ( $this->getNamespace() < 0 ) { return false; @@ -1640,81 +2728,37 @@ class Title { return false; } - if ( !isset( $this->mTitleProtection ) ) { - $dbr = wfGetDB( DB_SLAVE ); - $res = $dbr->select( 'protected_titles', '*', - array( 'pt_namespace' => $this->getNamespace(), 'pt_title' => $this->getDBkey() ), - __METHOD__ ); + if ( $this->mTitleProtection === null ) { + $dbr = wfGetDB( DB_REPLICA ); + $commentStore = new CommentStore( 'pt_reason' ); + $commentQuery = $commentStore->getJoin(); + $res = $dbr->select( + [ 'protected_titles' ] + $commentQuery['tables'], + [ + 'user' => 'pt_user', + 'expiry' => 'pt_expiry', + 'permission' => 'pt_create_perm' + ] + $commentQuery['fields'], + [ 'pt_namespace' => $this->getNamespace(), 'pt_title' => $this->getDBkey() ], + __METHOD__, + [], + $commentQuery['joins'] + ); // fetchRow returns false if there are no rows. - $this->mTitleProtection = $dbr->fetchRow( $res ); - } - return $this->mTitleProtection; - } - - /** - * Update the title protection status - * - * @param $create_perm \type{\string} Permission required for creation - * @param $reason \type{\string} Reason for protection - * @param $expiry \type{\string} Expiry timestamp - * @return boolean true - */ - public function updateTitleProtection( $create_perm, $reason, $expiry ) { - global $wgUser, $wgContLang; - - if ( $create_perm == implode( ',', $this->getRestrictions( 'create' ) ) - && $expiry == $this->mRestrictionsExpiry['create'] ) { - // No change - return true; - } - - list ( $namespace, $title ) = array( $this->getNamespace(), $this->getDBkey() ); - - $dbw = wfGetDB( DB_MASTER ); - - $encodedExpiry = Block::encodeExpiry( $expiry, $dbw ); - - $expiry_description = ''; - if ( $encodedExpiry != 'infinity' ) { - $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ), - $wgContLang->date( $expiry ) , $wgContLang->time( $expiry ) ) . ')'; - } else { - $expiry_description .= ' (' . wfMsgForContent( 'protect-expiry-indefinite' ) . ')'; - } - - # Update protection table - if ( $create_perm != '' ) { - $this->mTitleProtection = array( - 'pt_namespace' => $namespace, - 'pt_title' => $title, - 'pt_create_perm' => $create_perm, - 'pt_timestamp' => Block::encodeExpiry( wfTimestampNow(), $dbw ), - 'pt_expiry' => $encodedExpiry, - 'pt_user' => $wgUser->getId(), - 'pt_reason' => $reason, - ); - $dbw->replace( 'protected_titles', array( array( 'pt_namespace', 'pt_title' ) ), - $this->mTitleProtection, __METHOD__ ); - } else { - $dbw->delete( 'protected_titles', array( 'pt_namespace' => $namespace, - 'pt_title' => $title ), __METHOD__ ); - $this->mTitleProtection = false; - } - - # Update the protection log - if ( $dbw->affectedRows() ) { - $log = new LogPage( 'protect' ); - - if ( $create_perm ) { - $params = array( "[create=$create_perm] $expiry_description", '' ); - $log->addEntry( ( isset( $this->mRestrictions['create'] ) && $this->mRestrictions['create'] ) ? 'modify' : 'protect', $this, trim( $reason ), $params ); + $row = $dbr->fetchRow( $res ); + if ( $row ) { + $this->mTitleProtection = [ + 'user' => $row['user'], + 'expiry' => $dbr->decodeExpiry( $row['expiry'] ), + 'permission' => $row['permission'], + 'reason' => $commentStore->getComment( $row )->text, + ]; } else { - $log->addEntry( 'unprotect', $this, $reason ); + $this->mTitleProtection = false; } } - - return true; + return $this->mTitleProtection; } /** @@ -1725,384 +2769,196 @@ class Title { $dbw->delete( 'protected_titles', - array( 'pt_namespace' => $this->getNamespace(), 'pt_title' => $this->getDBkey() ), + [ 'pt_namespace' => $this->getNamespace(), 'pt_title' => $this->getDBkey() ], __METHOD__ ); $this->mTitleProtection = false; } /** - * Would anybody with sufficient privileges be able to move this page? - * Some pages just aren't movable. + * Is this page "semi-protected" - the *only* protection levels are listed + * in $wgSemiprotectedRestrictionLevels? * - * @return \type{\bool} TRUE or FALSE + * @param string $action Action to check (default: edit) + * @return bool */ - public function isMovable() { - return MWNamespace::isMovable( $this->getNamespace() ) && $this->getInterwiki() == ''; - } - - /** - * Can $wgUser read this page? - * - * @return \type{\bool} - * @todo fold these checks into userCan() - */ - public function userCanRead() { - global $wgUser, $wgGroupPermissions; - - static $useShortcut = null; - - # Initialize the $useShortcut boolean, to determine if we can skip quite a bit of code below - if ( is_null( $useShortcut ) ) { - global $wgRevokePermissions; - $useShortcut = true; - if ( empty( $wgGroupPermissions['*']['read'] ) ) { - # Not a public wiki, so no shortcut - $useShortcut = false; - } elseif ( !empty( $wgRevokePermissions ) ) { - /* - * Iterate through each group with permissions being revoked (key not included since we don't care - * what the group name is), then check if the read permission is being revoked. If it is, then - * we don't use the shortcut below since the user might not be able to read, even though anon - * reading is allowed. - */ - foreach ( $wgRevokePermissions as $perms ) { - if ( !empty( $perms['read'] ) ) { - # We might be removing the read right from the user, so no shortcut - $useShortcut = false; - break; - } - } - } - } + public function isSemiProtected( $action = 'edit' ) { + global $wgSemiprotectedRestrictionLevels; - $result = null; - wfRunHooks( 'userCan', array( &$this, &$wgUser, 'read', &$result ) ); - if ( $result !== null ) { - return $result; + $restrictions = $this->getRestrictions( $action ); + $semi = $wgSemiprotectedRestrictionLevels; + if ( !$restrictions || !$semi ) { + // Not protected, or all protection is full protection + return false; } - # Shortcut for public wikis, allows skipping quite a bit of code - if ( $useShortcut ) { - return true; + // Remap autoconfirmed to editsemiprotected for BC + foreach ( array_keys( $semi, 'autoconfirmed' ) as $key ) { + $semi[$key] = 'editsemiprotected'; } - - if ( $wgUser->isAllowed( 'read' ) ) { - return true; - } else { - global $wgWhitelistRead; - - /** - * Always grant access to the login page. - * Even anons need to be able to log in. - */ - if ( $this->isSpecial( 'Userlogin' ) || $this->isSpecial( 'Resetpass' ) ) { - return true; - } - - /** - * Bail out if there isn't whitelist - */ - if ( !is_array( $wgWhitelistRead ) ) { - return false; - } - - /** - * Check for explicit whitelisting - */ - $name = $this->getPrefixedText(); - $dbName = $this->getPrefixedDBKey(); - // Check with and without underscores - if ( in_array( $name, $wgWhitelistRead, true ) || in_array( $dbName, $wgWhitelistRead, true ) ) - return true; - - /** - * Old settings might have the title prefixed with - * a colon for main-namespace pages - */ - if ( $this->getNamespace() == NS_MAIN ) { - if ( in_array( ':' . $name, $wgWhitelistRead ) ) { - return true; - } - } - - /** - * If it's a special page, ditch the subpage bit - * and check again - */ - if ( $this->getNamespace() == NS_SPECIAL ) { - $name = $this->getDBkey(); - list( $name, /* $subpage */ ) = SpecialPage::resolveAliasWithSubpage( $name ); - if ( $name === false ) { - # Invalid special page, but we show standard login required message - return false; - } - - $pure = SpecialPage::getTitleFor( $name )->getPrefixedText(); - if ( in_array( $pure, $wgWhitelistRead, true ) ) { - return true; - } - } - + foreach ( array_keys( $restrictions, 'autoconfirmed' ) as $key ) { + $restrictions[$key] = 'editsemiprotected'; } - return false; - } - - /** - * Is this a talk page of some sort? - * - * @return \type{\bool} - */ - public function isTalkPage() { - return MWNamespace::isTalk( $this->getNamespace() ); - } - /** - * Is this a subpage? - * - * @return \type{\bool} - */ - public function isSubpage() { - return MWNamespace::hasSubpages( $this->mNamespace ) - ? strpos( $this->getText(), '/' ) !== false - : false; + return !array_diff( $restrictions, $semi ); } /** - * Does this have subpages? (Warning, usually requires an extra DB query.) + * Does the title correspond to a protected article? * - * @return \type{\bool} + * @param string $action The action the page is protected from, + * by default checks all actions. + * @return bool */ - public function hasSubpages() { - if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) { - # Duh - return false; - } - - # We dynamically add a member variable for the purpose of this method - # alone to cache the result. There's no point in having it hanging - # around uninitialized in every Title object; therefore we only add it - # if needed and don't declare it statically. - if ( isset( $this->mHasSubpages ) ) { - return $this->mHasSubpages; - } + public function isProtected( $action = '' ) { + global $wgRestrictionLevels; - $subpages = $this->getSubpages( 1 ); - if ( $subpages instanceof TitleArray ) { - return $this->mHasSubpages = (bool)$subpages->count(); - } - return $this->mHasSubpages = false; - } + $restrictionTypes = $this->getRestrictionTypes(); - /** - * Get all subpages of this page. - * - * @param $limit Maximum number of subpages to fetch; -1 for no limit - * @return mixed TitleArray, or empty array if this page's namespace - * doesn't allow subpages - */ - public function getSubpages( $limit = -1 ) { - if ( !MWNamespace::hasSubpages( $this->getNamespace() ) ) { - return array(); + # Special pages have inherent protection + if ( $this->isSpecialPage() ) { + return true; } - $dbr = wfGetDB( DB_SLAVE ); - $conds['page_namespace'] = $this->getNamespace(); - $conds[] = 'page_title ' . $dbr->buildLike( $this->getDBkey() . '/', $dbr->anyString() ); - $options = array(); - if ( $limit > -1 ) { - $options['LIMIT'] = $limit; + # Check regular protection levels + foreach ( $restrictionTypes as $type ) { + if ( $action == $type || $action == '' ) { + $r = $this->getRestrictions( $type ); + foreach ( $wgRestrictionLevels as $level ) { + if ( in_array( $level, $r ) && $level != '' ) { + return true; + } + } + } } - return $this->mSubpages = TitleArray::newFromResult( - $dbr->select( 'page', - array( 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' ), - $conds, - __METHOD__, - $options - ) - ); - } - - /** - * Could this page contain custom CSS or JavaScript, based - * on the title? - * - * @return \type{\bool} - */ - public function isCssOrJsPage() { - return $this->mNamespace == NS_MEDIAWIKI - && preg_match( '!\.(?:css|js)$!u', $this->mTextform ) > 0; - } - - /** - * Is this a .css or .js subpage of a user page? - * @return \type{\bool} - */ - public function isCssJsSubpage() { - return ( NS_USER == $this->mNamespace and preg_match( "/\\/.*\\.(?:css|js)$/", $this->mTextform ) ); - } - /** - * Is this a *valid* .css or .js subpage of a user page? - * - * @return \type{\bool} - * @deprecated - */ - public function isValidCssJsSubpage() { - return $this->isCssJsSubpage(); - } - - /** - * Trim down a .css or .js subpage title to get the corresponding skin name - * - * @return string containing skin name from .css or .js subpage title - */ - public function getSkinFromCssJsSubpage() { - $subpage = explode( '/', $this->mTextform ); - $subpage = $subpage[ count( $subpage ) - 1 ]; - return( str_replace( array( '.css', '.js' ), array( '', '' ), $subpage ) ); - } - - /** - * Is this a .css subpage of a user page? - * - * @return \type{\bool} - */ - public function isCssSubpage() { - return ( NS_USER == $this->mNamespace && preg_match( "/\\/.*\\.css$/", $this->mTextform ) ); + return false; } /** - * Is this a .js subpage of a user page? + * Determines if $user is unable to edit this page because it has been protected + * by $wgNamespaceProtection. * - * @return \type{\bool} + * @param User $user User object to check permissions + * @return bool */ - public function isJsSubpage() { - return ( NS_USER == $this->mNamespace && preg_match( "/\\/.*\\.js$/", $this->mTextform ) ); - } + public function isNamespaceProtected( User $user ) { + global $wgNamespaceProtection; - /** - * Protect css subpages of user pages: can $wgUser edit - * this page? - * - * @return \type{\bool} - * @todo XXX: this might be better using restrictions - */ - public function userCanEditCssSubpage() { - global $wgUser; - return ( ( $wgUser->isAllowed( 'editusercssjs' ) && $wgUser->isAllowed( 'editusercss' ) ) - || preg_match( '/^' . preg_quote( $wgUser->getName(), '/' ) . '\//', $this->mTextform ) ); + if ( isset( $wgNamespaceProtection[$this->mNamespace] ) ) { + foreach ( (array)$wgNamespaceProtection[$this->mNamespace] as $right ) { + if ( $right != '' && !$user->isAllowed( $right ) ) { + return true; + } + } + } + return false; } /** - * Protect js subpages of user pages: can $wgUser edit - * this page? + * Cascading protection: Return true if cascading restrictions apply to this page, false if not. * - * @return \type{\bool} - * @todo XXX: this might be better using restrictions + * @return bool If the page is subject to cascading restrictions. */ - public function userCanEditJsSubpage() { - global $wgUser; - return ( ( $wgUser->isAllowed( 'editusercssjs' ) && $wgUser->isAllowed( 'edituserjs' ) ) - || preg_match( '/^' . preg_quote( $wgUser->getName(), '/' ) . '\//', $this->mTextform ) ); + public function isCascadeProtected() { + list( $sources, /* $restrictions */ ) = $this->getCascadeProtectionSources( false ); + return ( $sources > 0 ); } /** - * Cascading protection: Return true if cascading restrictions apply to this page, false if not. + * Determines whether cascading protection sources have already been loaded from + * the database. * - * @return \type{\bool} If the page is subject to cascading restrictions. + * @param bool $getPages True to check if the pages are loaded, or false to check + * if the status is loaded. + * @return bool Whether or not the specified information has been loaded + * @since 1.23 */ - public function isCascadeProtected() { - list( $sources, /* $restrictions */ ) = $this->getCascadeProtectionSources( false ); - return ( $sources > 0 ); + public function areCascadeProtectionSourcesLoaded( $getPages = true ) { + return $getPages ? $this->mCascadeSources !== null : $this->mHasCascadingRestrictions !== null; } /** * Cascading protection: Get the source of any cascading restrictions on this page. * - * @param $getPages \type{\bool} Whether or not to retrieve the actual pages - * that the restrictions have come from. - * @return \type{\arrayof{mixed title array, restriction array}} Array of the Title - * objects of the pages from which cascading restrictions have come, - * false for none, or true if such restrictions exist, but $getPages was not set. - * The restriction array is an array of each type, each of which contains a - * array of unique groups. + * @param bool $getPages Whether or not to retrieve the actual pages + * that the restrictions have come from and the actual restrictions + * themselves. + * @return array Two elements: First is an array of Title objects of the + * pages from which cascading restrictions have come, false for + * none, or true if such restrictions exist but $getPages was not + * set. Second is an array like that returned by + * Title::getAllRestrictions(), or an empty array if $getPages is + * false. */ public function getCascadeProtectionSources( $getPages = true ) { - $pagerestrictions = array(); + $pagerestrictions = []; - if ( isset( $this->mCascadeSources ) && $getPages ) { - return array( $this->mCascadeSources, $this->mCascadingRestrictions ); - } else if ( isset( $this->mHasCascadingRestrictions ) && !$getPages ) { - return array( $this->mHasCascadingRestrictions, $pagerestrictions ); + if ( $this->mCascadeSources !== null && $getPages ) { + return [ $this->mCascadeSources, $this->mCascadingRestrictions ]; + } elseif ( $this->mHasCascadingRestrictions !== null && !$getPages ) { + return [ $this->mHasCascadingRestrictions, $pagerestrictions ]; } - wfProfileIn( __METHOD__ ); - - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); if ( $this->getNamespace() == NS_FILE ) { - $tables = array( 'imagelinks', 'page_restrictions' ); - $where_clauses = array( + $tables = [ 'imagelinks', 'page_restrictions' ]; + $where_clauses = [ 'il_to' => $this->getDBkey(), 'il_from=pr_page', 'pr_cascade' => 1 - ); + ]; } else { - $tables = array( 'templatelinks', 'page_restrictions' ); - $where_clauses = array( + $tables = [ 'templatelinks', 'page_restrictions' ]; + $where_clauses = [ 'tl_namespace' => $this->getNamespace(), 'tl_title' => $this->getDBkey(), 'tl_from=pr_page', 'pr_cascade' => 1 - ); + ]; } if ( $getPages ) { - $cols = array( 'pr_page', 'page_namespace', 'page_title', - 'pr_expiry', 'pr_type', 'pr_level' ); + $cols = [ 'pr_page', 'page_namespace', 'page_title', + 'pr_expiry', 'pr_type', 'pr_level' ]; $where_clauses[] = 'page_id=pr_page'; $tables[] = 'page'; } else { - $cols = array( 'pr_expiry' ); + $cols = [ 'pr_expiry' ]; } $res = $dbr->select( $tables, $cols, $where_clauses, __METHOD__ ); - $sources = $getPages ? array() : false; + $sources = $getPages ? [] : false; $now = wfTimestampNow(); - $purgeExpired = false; foreach ( $res as $row ) { - $expiry = Block::decodeExpiry( $row->pr_expiry ); + $expiry = $dbr->decodeExpiry( $row->pr_expiry ); if ( $expiry > $now ) { if ( $getPages ) { $page_id = $row->pr_page; $page_ns = $row->page_namespace; $page_title = $row->page_title; - $sources[$page_id] = Title::makeTitle( $page_ns, $page_title ); + $sources[$page_id] = self::makeTitle( $page_ns, $page_title ); # Add groups needed for each restriction type if its not already there # Make sure this restriction type still exists if ( !isset( $pagerestrictions[$row->pr_type] ) ) { - $pagerestrictions[$row->pr_type] = array(); + $pagerestrictions[$row->pr_type] = []; } - if ( isset( $pagerestrictions[$row->pr_type] ) && - !in_array( $row->pr_level, $pagerestrictions[$row->pr_type] ) ) { + if ( + isset( $pagerestrictions[$row->pr_type] ) + && !in_array( $row->pr_level, $pagerestrictions[$row->pr_type] ) + ) { $pagerestrictions[$row->pr_type][] = $row->pr_level; } } else { $sources = true; } - } else { - // Trigger lazy purge of expired restrictions from the db - $purgeExpired = true; } } - if ( $purgeExpired ) { - Title::purgeExpiredRestrictions(); - } if ( $getPages ) { $this->mCascadeSources = $sources; @@ -2110,39 +2966,78 @@ class Title { } else { $this->mHasCascadingRestrictions = $sources; } - - wfProfileOut( __METHOD__ ); - return array( $sources, $pagerestrictions ); + + return [ $sources, $pagerestrictions ]; + } + + /** + * Accessor for mRestrictionsLoaded + * + * @return bool Whether or not the page's restrictions have already been + * loaded from the database + * @since 1.23 + */ + public function areRestrictionsLoaded() { + return $this->mRestrictionsLoaded; + } + + /** + * Accessor/initialisation for mRestrictions + * + * @param string $action Action that permission needs to be checked for + * @return array Restriction levels needed to take the action. All levels are + * required. Note that restriction levels are normally user rights, but 'sysop' + * and 'autoconfirmed' are also allowed for backwards compatibility. These should + * be mapped to 'editprotected' and 'editsemiprotected' respectively. + */ + public function getRestrictions( $action ) { + if ( !$this->mRestrictionsLoaded ) { + $this->loadRestrictions(); + } + return isset( $this->mRestrictions[$action] ) + ? $this->mRestrictions[$action] + : []; } /** - * Returns cascading restrictions for the current article + * Accessor/initialisation for mRestrictions * - * @return Boolean + * @return array Keys are actions, values are arrays as returned by + * Title::getRestrictions() + * @since 1.23 */ - function areRestrictionsCascading() { + public function getAllRestrictions() { if ( !$this->mRestrictionsLoaded ) { $this->loadRestrictions(); } - - return $this->mCascadeRestriction; + return $this->mRestrictions; } /** - * Loads a string into mRestrictions array + * Get the expiry time for the restriction against a given action * - * @param $res \type{Resource} restrictions as an SQL result. - * @param $oldFashionedRestrictions string comma-separated list of page - * restrictions from page table (pre 1.10) + * @param string $action + * @return string|bool 14-char timestamp, or 'infinity' if the page is protected forever + * or not protected at all, or false if the action is not recognised. */ - private function loadRestrictionsFromResultWrapper( $res, $oldFashionedRestrictions = null ) { - $rows = array(); + public function getRestrictionExpiry( $action ) { + if ( !$this->mRestrictionsLoaded ) { + $this->loadRestrictions(); + } + return isset( $this->mRestrictionsExpiry[$action] ) ? $this->mRestrictionsExpiry[$action] : false; + } - foreach ( $res as $row ) { - $rows[] = $row; + /** + * Returns cascading restrictions for the current article + * + * @return bool + */ + function areRestrictionsCascading() { + if ( !$this->mRestrictionsLoaded ) { + $this->loadRestrictions(); } - $this->loadRestrictionsFromRows( $rows, $oldFashionedRestrictions ); + return $this->mCascadeRestriction; } /** @@ -2150,62 +3045,60 @@ class Title { * and page_restrictions table for this existing page. * Public for usage by LiquidThreads. * - * @param $rows array of db result objects - * @param $oldFashionedRestrictions string comma-separated list of page - * restrictions from page table (pre 1.10) + * @param array $rows Array of db result objects + * @param string $oldFashionedRestrictions Comma-separated list of page + * restrictions from page table (pre 1.10) */ public function loadRestrictionsFromRows( $rows, $oldFashionedRestrictions = null ) { - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); $restrictionTypes = $this->getRestrictionTypes(); foreach ( $restrictionTypes as $type ) { - $this->mRestrictions[$type] = array(); - $this->mRestrictionsExpiry[$type] = Block::decodeExpiry( '' ); + $this->mRestrictions[$type] = []; + $this->mRestrictionsExpiry[$type] = 'infinity'; } $this->mCascadeRestriction = false; # Backwards-compatibility: also load the restrictions from the page record (old format). - - if ( $oldFashionedRestrictions === null ) { - $oldFashionedRestrictions = $dbr->selectField( 'page', 'page_restrictions', - array( 'page_id' => $this->getArticleId() ), __METHOD__ ); + if ( $oldFashionedRestrictions !== null ) { + $this->mOldRestrictions = $oldFashionedRestrictions; } - if ( $oldFashionedRestrictions != '' ) { + if ( $this->mOldRestrictions === false ) { + $this->mOldRestrictions = $dbr->selectField( 'page', 'page_restrictions', + [ 'page_id' => $this->getArticleID() ], __METHOD__ ); + } - foreach ( explode( ':', trim( $oldFashionedRestrictions ) ) as $restrict ) { + if ( $this->mOldRestrictions != '' ) { + foreach ( explode( ':', trim( $this->mOldRestrictions ) ) as $restrict ) { $temp = explode( '=', trim( $restrict ) ); if ( count( $temp ) == 1 ) { // old old format should be treated as edit/move restriction $this->mRestrictions['edit'] = explode( ',', trim( $temp[0] ) ); $this->mRestrictions['move'] = explode( ',', trim( $temp[0] ) ); } else { - $this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) ); + $restriction = trim( $temp[1] ); + if ( $restriction != '' ) { // some old entries are empty + $this->mRestrictions[$temp[0]] = explode( ',', $restriction ); + } } } - - $this->mOldRestrictions = true; - } if ( count( $rows ) ) { # Current system - load second to make them override. $now = wfTimestampNow(); - $purgeExpired = false; + # Cycle through all the restrictions. foreach ( $rows as $row ) { - # Cycle through all the restrictions. - // Don't take care of restrictions types that aren't allowed - - if ( !in_array( $row->pr_type, $restrictionTypes ) ) + if ( !in_array( $row->pr_type, $restrictionTypes ) ) { continue; + } - // This code should be refactored, now that it's being used more generally, - // But I don't really see any harm in leaving it in Block for now -werdna - $expiry = Block::decodeExpiry( $row->pr_expiry ); + $expiry = $dbr->decodeExpiry( $row->pr_expiry ); // Only apply the restrictions if they haven't expired! if ( !$expiry || $expiry > $now ) { @@ -2213,15 +3106,8 @@ class Title { $this->mRestrictions[$row->pr_type] = explode( ',', trim( $row->pr_level ) ); $this->mCascadeRestriction |= $row->pr_cascade; - } else { - // Trigger a lazy purge of expired restrictions - $purgeExpired = true; } } - - if ( $purgeExpired ) { - Title::purgeExpiredRestrictions(); - } } $this->mRestrictionsLoaded = true; @@ -2230,104 +3116,183 @@ class Title { /** * Load restrictions from the page_restrictions table * - * @param $oldFashionedRestrictions string comma-separated list of page - * restrictions from page table (pre 1.10) + * @param string $oldFashionedRestrictions Comma-separated list of page + * restrictions from page table (pre 1.10) */ public function loadRestrictions( $oldFashionedRestrictions = null ) { - if ( !$this->mRestrictionsLoaded ) { - if ( $this->exists() ) { - $dbr = wfGetDB( DB_SLAVE ); + if ( $this->mRestrictionsLoaded ) { + return; + } - $res = $dbr->select( 'page_restrictions', '*', - array( 'pr_page' => $this->getArticleId() ), __METHOD__ ); + $id = $this->getArticleID(); + if ( $id ) { + $cache = ObjectCache::getMainWANInstance(); + $rows = $cache->getWithSetCallback( + // Page protections always leave a new null revision + $cache->makeKey( 'page-restrictions', $id, $this->getLatestRevID() ), + $cache::TTL_DAY, + function ( $curValue, &$ttl, array &$setOpts ) { + $dbr = wfGetDB( DB_REPLICA ); + + $setOpts += Database::getCacheSetOptions( $dbr ); + + return iterator_to_array( + $dbr->select( + 'page_restrictions', + [ 'pr_type', 'pr_expiry', 'pr_level', 'pr_cascade' ], + [ 'pr_page' => $this->getArticleID() ], + __METHOD__ + ) + ); + } + ); - $this->loadRestrictionsFromResultWrapper( $res, $oldFashionedRestrictions ); - } else { - $title_protection = $this->getTitleProtection(); - - if ( $title_protection ) { - $now = wfTimestampNow(); - $expiry = Block::decodeExpiry( $title_protection['pt_expiry'] ); - - if ( !$expiry || $expiry > $now ) { - // Apply the restrictions - $this->mRestrictionsExpiry['create'] = $expiry; - $this->mRestrictions['create'] = explode( ',', trim( $title_protection['pt_create_perm'] ) ); - } else { // Get rid of the old restrictions - Title::purgeExpiredRestrictions(); - $this->mTitleProtection = false; - } - } else { - $this->mRestrictionsExpiry['create'] = Block::decodeExpiry( '' ); + $this->loadRestrictionsFromRows( $rows, $oldFashionedRestrictions ); + } else { + $title_protection = $this->getTitleProtectionInternal(); + + if ( $title_protection ) { + $now = wfTimestampNow(); + $expiry = wfGetDB( DB_REPLICA )->decodeExpiry( $title_protection['expiry'] ); + + if ( !$expiry || $expiry > $now ) { + // Apply the restrictions + $this->mRestrictionsExpiry['create'] = $expiry; + $this->mRestrictions['create'] = + explode( ',', trim( $title_protection['permission'] ) ); + } else { // Get rid of the old restrictions + $this->mTitleProtection = false; } - $this->mRestrictionsLoaded = true; + } else { + $this->mRestrictionsExpiry['create'] = 'infinity'; } + $this->mRestrictionsLoaded = true; } } + /** + * Flush the protection cache in this object and force reload from the database. + * This is used when updating protection from WikiPage::doUpdateRestrictions(). + */ + public function flushRestrictions() { + $this->mRestrictionsLoaded = false; + $this->mTitleProtection = null; + } + /** * Purge expired restrictions from the page_restrictions table + * + * This will purge no more than $wgUpdateRowsPerQuery page_restrictions rows */ static function purgeExpiredRestrictions() { - $dbw = wfGetDB( DB_MASTER ); - $dbw->delete( - 'page_restrictions', - array( 'pr_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), - __METHOD__ - ); + if ( wfReadOnly() ) { + return; + } - $dbw->delete( - 'protected_titles', - array( 'pt_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), - __METHOD__ - ); + DeferredUpdates::addUpdate( new AtomicSectionUpdate( + wfGetDB( DB_MASTER ), + __METHOD__, + function ( IDatabase $dbw, $fname ) { + $config = MediaWikiServices::getInstance()->getMainConfig(); + $ids = $dbw->selectFieldValues( + 'page_restrictions', + 'pr_id', + [ 'pr_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ], + $fname, + [ 'LIMIT' => $config->get( 'UpdateRowsPerQuery' ) ] // T135470 + ); + if ( $ids ) { + $dbw->delete( 'page_restrictions', [ 'pr_id' => $ids ], $fname ); + } + } + ) ); + + DeferredUpdates::addUpdate( new AtomicSectionUpdate( + wfGetDB( DB_MASTER ), + __METHOD__, + function ( IDatabase $dbw, $fname ) { + $dbw->delete( + 'protected_titles', + [ 'pt_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ], + $fname + ); + } + ) ); } /** - * Accessor/initialisation for mRestrictions + * Does this have subpages? (Warning, usually requires an extra DB query.) * - * @param $action \type{\string} action that permission needs to be checked for - * @return \type{\arrayof{\string}} the array of groups allowed to edit this article + * @return bool */ - public function getRestrictions( $action ) { - if ( !$this->mRestrictionsLoaded ) { - $this->loadRestrictions(); + public function hasSubpages() { + if ( !MWNamespace::hasSubpages( $this->mNamespace ) ) { + # Duh + return false; } - return isset( $this->mRestrictions[$action] ) - ? $this->mRestrictions[$action] - : array(); + + # We dynamically add a member variable for the purpose of this method + # alone to cache the result. There's no point in having it hanging + # around uninitialized in every Title object; therefore we only add it + # if needed and don't declare it statically. + if ( $this->mHasSubpages === null ) { + $this->mHasSubpages = false; + $subpages = $this->getSubpages( 1 ); + if ( $subpages instanceof TitleArray ) { + $this->mHasSubpages = (bool)$subpages->count(); + } + } + + return $this->mHasSubpages; } /** - * Get the expiry time for the restriction against a given action + * Get all subpages of this page. * - * @return 14-char timestamp, or 'infinity' if the page is protected forever - * or not protected at all, or false if the action is not recognised. + * @param int $limit Maximum number of subpages to fetch; -1 for no limit + * @return TitleArray|array TitleArray, or empty array if this page's namespace + * doesn't allow subpages */ - public function getRestrictionExpiry( $action ) { - if ( !$this->mRestrictionsLoaded ) { - $this->loadRestrictions(); + public function getSubpages( $limit = -1 ) { + if ( !MWNamespace::hasSubpages( $this->getNamespace() ) ) { + return []; } - return isset( $this->mRestrictionsExpiry[$action] ) ? $this->mRestrictionsExpiry[$action] : false; + + $dbr = wfGetDB( DB_REPLICA ); + $conds['page_namespace'] = $this->getNamespace(); + $conds[] = 'page_title ' . $dbr->buildLike( $this->getDBkey() . '/', $dbr->anyString() ); + $options = []; + if ( $limit > -1 ) { + $options['LIMIT'] = $limit; + } + return TitleArray::newFromResult( + $dbr->select( 'page', + [ 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' ], + $conds, + __METHOD__, + $options + ) + ); } /** * Is there a version of this page in the deletion archive? * - * @return \type{\int} the number of archived revisions + * @return int The number of archived revisions */ public function isDeleted() { if ( $this->getNamespace() < 0 ) { $n = 0; } else { - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); + $n = $dbr->selectField( 'archive', 'COUNT(*)', - array( 'ar_namespace' => $this->getNamespace(), 'ar_title' => $this->getDBkey() ), + [ 'ar_namespace' => $this->getNamespace(), 'ar_title' => $this->getDBkey() ], __METHOD__ ); if ( $this->getNamespace() == NS_FILE ) { $n += $dbr->selectField( 'filearchive', 'COUNT(*)', - array( 'fa_name' => $this->getDBkey() ), + [ 'fa_name' => $this->getDBkey() ], __METHOD__ ); } @@ -2338,20 +3303,20 @@ class Title { /** * Is there a version of this page in the deletion archive? * - * @return Boolean + * @return bool */ public function isDeletedQuick() { if ( $this->getNamespace() < 0 ) { return false; } - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); $deleted = (bool)$dbr->selectField( 'archive', '1', - array( 'ar_namespace' => $this->getNamespace(), 'ar_title' => $this->getDBkey() ), + [ 'ar_namespace' => $this->getNamespace(), 'ar_title' => $this->getDBkey() ], __METHOD__ ); if ( !$deleted && $this->getNamespace() == NS_FILE ) { $deleted = (bool)$dbr->selectField( 'filearchive', '1', - array( 'fa_name' => $this->getDBkey() ), + [ 'fa_name' => $this->getDBkey() ], __METHOD__ ); } @@ -2362,13 +3327,14 @@ class Title { * Get the article ID for this Title from the link cache, * adding it if necessary * - * @param $flags \type{\int} a bit field; may be Title::GAID_FOR_UPDATE to select + * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select * for update - * @return \type{\int} the ID + * @return int The ID */ public function getArticleID( $flags = 0 ) { if ( $this->getNamespace() < 0 ) { - return $this->mArticleID = 0; + $this->mArticleID = 0; + return $this->mArticleID; } $linkCache = LinkCache::singleton(); if ( $flags & self::GAID_FOR_UPDATE ) { @@ -2388,19 +3354,33 @@ class Title { * Is this an article that is a redirect page? * Uses link cache, adding it if necessary * - * @param $flags \type{\int} a bit field; may be Title::GAID_FOR_UPDATE to select for update - * @return \type{\bool} + * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update + * @return bool */ public function isRedirect( $flags = 0 ) { if ( !is_null( $this->mRedirect ) ) { return $this->mRedirect; } - # Calling getArticleID() loads the field from cache as needed if ( !$this->getArticleID( $flags ) ) { - return $this->mRedirect = false; + $this->mRedirect = false; + return $this->mRedirect; } + $linkCache = LinkCache::singleton(); - $this->mRedirect = (bool)$linkCache->getGoodLinkFieldObj( $this, 'redirect' ); + $linkCache->addLinkObj( $this ); # in case we already had an article ID + $cached = $linkCache->getGoodLinkFieldObj( $this, 'redirect' ); + if ( $cached === null ) { + # Trust LinkCache's state over our own + # LinkCache is telling us that the page doesn't exist, despite there being cached + # data relating to an existing page in $this->mArticleID. Updaters should clear + # LinkCache as appropriate, or use $flags = Title::GAID_FOR_UPDATE. If that flag is + # set, then LinkCache will definitely be up to date here, since getArticleID() forces + # LinkCache to refresh its data from the master. + $this->mRedirect = false; + return $this->mRedirect; + } + + $this->mRedirect = (bool)$cached; return $this->mRedirect; } @@ -2409,19 +3389,27 @@ class Title { * What is the length of this page? * Uses link cache, adding it if necessary * - * @param $flags \type{\int} a bit field; may be Title::GAID_FOR_UPDATE to select for update - * @return \type{\bool} + * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update + * @return int */ public function getLength( $flags = 0 ) { if ( $this->mLength != -1 ) { return $this->mLength; } - # Calling getArticleID() loads the field from cache as needed if ( !$this->getArticleID( $flags ) ) { - return $this->mLength = 0; + $this->mLength = 0; + return $this->mLength; } $linkCache = LinkCache::singleton(); - $this->mLength = intval( $linkCache->getGoodLinkFieldObj( $this, 'length' ) ); + $linkCache->addLinkObj( $this ); # in case we already had an article ID + $cached = $linkCache->getGoodLinkFieldObj( $this, 'length' ); + if ( $cached === null ) { + # Trust LinkCache's state over our own, as for isRedirect() + $this->mLength = 0; + return $this->mLength; + } + + $this->mLength = intval( $cached ); return $this->mLength; } @@ -2429,19 +3417,27 @@ class Title { /** * What is the page_latest field for this page? * - * @param $flags \type{\int} a bit field; may be Title::GAID_FOR_UPDATE to select for update - * @return \type{\int} or 0 if the page doesn't exist + * @param int $flags A bit field; may be Title::GAID_FOR_UPDATE to select for update + * @return int Int or 0 if the page doesn't exist */ public function getLatestRevID( $flags = 0 ) { - if ( $this->mLatestID !== false ) { + if ( !( $flags & self::GAID_FOR_UPDATE ) && $this->mLatestID !== false ) { return intval( $this->mLatestID ); } - # Calling getArticleID() loads the field from cache as needed if ( !$this->getArticleID( $flags ) ) { - return $this->mLatestID = 0; + $this->mLatestID = 0; + return $this->mLatestID; } $linkCache = LinkCache::singleton(); - $this->mLatestID = intval( $linkCache->getGoodLinkFieldObj( $this, 'revision' ) ); + $linkCache->addLinkObj( $this ); # in case we already had an article ID + $cached = $linkCache->getGoodLinkFieldObj( $this, 'revision' ); + if ( $cached === null ) { + # Trust LinkCache's state over our own, as for isRedirect() + $this->mLatestID = 0; + return $this->mLatestID; + } + + $this->mLatestID = intval( $cached ); return $this->mLatestID; } @@ -2450,15 +3446,15 @@ class Title { * This clears some fields in this object, and clears any associated * keys in the "bad links" section of the link cache. * - * - This is called from Article::insertNewArticle() to allow + * - This is called from WikiPage::doEditContent() and WikiPage::insertOn() to allow * loading of the new page_id. It's also called from - * Article::doDeleteArticle() + * WikiPage::doDeleteArticleReal() * - * @param $newid \type{\int} the new Article ID + * @param int $newid The new Article ID */ public function resetArticleID( $newid ) { $linkCache = LinkCache::singleton(); - $linkCache->clearBadLink( $this->getPrefixedDBkey() ); + $linkCache->clearLink( $this ); if ( $newid === false ) { $this->mArticleID = -1; @@ -2466,84 +3462,32 @@ class Title { $this->mArticleID = intval( $newid ); } $this->mRestrictionsLoaded = false; - $this->mRestrictions = array(); + $this->mRestrictions = []; + $this->mOldRestrictions = false; $this->mRedirect = null; $this->mLength = -1; $this->mLatestID = false; + $this->mContentModel = false; + $this->mEstimateRevisions = null; + $this->mPageLanguage = false; + $this->mDbPageLanguage = false; + $this->mIsBigDeletion = null; } - /** - * Updates page_touched for this page; called from LinksUpdate.php - * - * @return \type{\bool} true if the update succeded - */ - public function invalidateCache() { - if ( wfReadOnly() ) { - return; - } - $dbw = wfGetDB( DB_MASTER ); - $success = $dbw->update( - 'page', - array( 'page_touched' => $dbw->timestamp() ), - $this->pageCond(), - __METHOD__ - ); - HTMLFileCache::clearFileCache( $this ); - return $success; - } - - /** - * Prefix some arbitrary text with the namespace or interwiki prefix - * of this object - * - * @param $name \type{\string} the text - * @return \type{\string} the prefixed text - * @private - */ - /* private */ function prefix( $name ) { - $p = ''; - if ( $this->mInterwiki != '' ) { - $p = $this->mInterwiki . ':'; - } - if ( 0 != $this->mNamespace ) { - $p .= $this->getNsText() . ':'; - } - return $p . $name; - } - - /** - * Returns a simple regex that will match on characters and sequences invalid in titles. - * Note that this doesn't pick up many things that could be wrong with titles, but that - * replacing this regex with something valid will make many titles valid. - * - * @return string regex string - */ - static function getTitleInvalidRegex() { - static $rxTc = false; - if ( !$rxTc ) { - # Matching titles will be held as illegal. - $rxTc = '/' . - # Any character not allowed is forbidden... - '[^' . Title::legalChars() . ']' . - # URL percent encoding sequences interfere with the ability - # to round-trip titles -- you can't link to them consistently. - '|%[0-9A-Fa-f]{2}' . - # XML/HTML character references produce similar issues. - '|&[A-Za-z0-9\x80-\xff]+;' . - '|&#[0-9]+;' . - '|&#x[0-9A-Fa-f]+;' . - '/S'; - } + public static function clearCaches() { + $linkCache = LinkCache::singleton(); + $linkCache->clear(); - return $rxTc; + $titleCache = self::getTitleCache(); + $titleCache->clear(); } /** * Capitalize a text string for a title if it belongs to a namespace that capitalizes * - * @param $text string containing title to capitalize - * @param $ns int namespace index, defaults to NS_MAIN - * @return String containing capitalized title + * @param string $text Containing title to capitalize + * @param int $ns Namespace index, defaults to NS_MAIN + * @return string Containing capitalized title */ public static function capitalize( $text, $ns = NS_MAIN ) { global $wgContLang; @@ -2564,917 +3508,420 @@ class Title { * namespace prefixes, sets the other forms, and canonicalizes * everything. * - * @return \type{\bool} true on success + * @throws MalformedTitleException On invalid titles + * @return bool True on success */ private function secureAndSplit() { - global $wgContLang, $wgLocalInterwiki; - # Initialisation - $rxTc = self::getTitleInvalidRegex(); - - $this->mInterwiki = $this->mFragment = ''; + $this->mInterwiki = ''; + $this->mFragment = ''; $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN $dbkey = $this->mDbkeyform; - # Strip Unicode bidi override characters. - # Sometimes they slip into cut-n-pasted page titles, where the - # override chars get included in list displays. - $dbkey = preg_replace( '/\xE2\x80[\x8E\x8F\xAA-\xAE]/S', '', $dbkey ); - - # Clean up whitespace - # Note: use of the /u option on preg_replace here will cause - # input with invalid UTF-8 sequences to be nullified out in PHP 5.2.x, - # conveniently disabling them. - # - $dbkey = preg_replace( '/[ _\xA0\x{1680}\x{180E}\x{2000}-\x{200A}\x{2028}\x{2029}\x{202F}\x{205F}\x{3000}]+/u', '_', $dbkey ); - $dbkey = trim( $dbkey, '_' ); - - if ( $dbkey == '' ) { - return false; - } - - if ( false !== strpos( $dbkey, UTF8_REPLACEMENT ) ) { - # Contained illegal UTF-8 sequences or forbidden Unicode chars. - return false; - } - - $this->mDbkeyform = $dbkey; - - # Initial colon indicates main namespace rather than specified default - # but should not create invalid {ns,title} pairs such as {0,Project:Foo} - if ( ':' == $dbkey { 0 } ) { - $this->mNamespace = NS_MAIN; - $dbkey = substr( $dbkey, 1 ); # remove the colon but continue processing - $dbkey = trim( $dbkey, '_' ); # remove any subsequent whitespace - } - - # Namespace or interwiki prefix - $firstPass = true; - $prefixRegexp = "/^(.+?)_*:_*(.*)$/S"; - do { - $m = array(); - if ( preg_match( $prefixRegexp, $dbkey, $m ) ) { - $p = $m[1]; - if ( ( $ns = $wgContLang->getNsIndex( $p ) ) !== false ) { - # Ordinary namespace - $dbkey = $m[2]; - $this->mNamespace = $ns; - # For Talk:X pages, check if X has a "namespace" prefix - if ( $ns == NS_TALK && preg_match( $prefixRegexp, $dbkey, $x ) ) { - if ( $wgContLang->getNsIndex( $x[1] ) ) { - return false; # Disallow Talk:File:x type titles... - } else if ( Interwiki::isValidInterwiki( $x[1] ) ) { - return false; # Disallow Talk:Interwiki:x type titles... - } - } - } elseif ( Interwiki::isValidInterwiki( $p ) ) { - if ( !$firstPass ) { - # Can't make a local interwiki link to an interwiki link. - # That's just crazy! - return false; - } + // @note: splitTitleString() is a temporary hack to allow MediaWikiTitleCodec to share + // the parsing code with Title, while avoiding massive refactoring. + // @todo: get rid of secureAndSplit, refactor parsing code. + // @note: getTitleParser() returns a TitleParser implementation which does not have a + // splitTitleString method, but the only implementation (MediaWikiTitleCodec) does + $titleCodec = MediaWikiServices::getInstance()->getTitleParser(); + // MalformedTitleException can be thrown here + $parts = $titleCodec->splitTitleString( $dbkey, $this->getDefaultNamespace() ); - # Interwiki link - $dbkey = $m[2]; - $this->mInterwiki = $wgContLang->lc( $p ); - - # Redundant interwiki prefix to the local wiki - if ( $wgLocalInterwiki !== false - && 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) - { - if ( $dbkey == '' ) { - # Can't have an empty self-link - return false; - } - $this->mInterwiki = ''; - $firstPass = false; - # Do another namespace split... - continue; - } + # Fill fields + $this->setFragment( '#' . $parts['fragment'] ); + $this->mInterwiki = $parts['interwiki']; + $this->mLocalInterwiki = $parts['local_interwiki']; + $this->mNamespace = $parts['namespace']; + $this->mUserCaseDBKey = $parts['user_case_dbkey']; - # If there's an initial colon after the interwiki, that also - # resets the default namespace - if ( $dbkey !== '' && $dbkey[0] == ':' ) { - $this->mNamespace = NS_MAIN; - $dbkey = substr( $dbkey, 1 ); - } - } - # If there's no recognized interwiki or namespace, - # then let the colon expression be part of the title. - } - break; - } while ( true ); + $this->mDbkeyform = $parts['dbkey']; + $this->mUrlform = wfUrlencode( $this->mDbkeyform ); + $this->mTextform = strtr( $this->mDbkeyform, '_', ' ' ); # We already know that some pages won't be in the database! - # - if ( $this->mInterwiki != '' || NS_SPECIAL == $this->mNamespace ) { + if ( $this->isExternal() || $this->isSpecialPage() ) { $this->mArticleID = 0; } - $fragment = strstr( $dbkey, '#' ); - if ( false !== $fragment ) { - $this->setFragment( preg_replace( '/^#_*/', '#', $fragment ) ); - $dbkey = substr( $dbkey, 0, strlen( $dbkey ) - strlen( $fragment ) ); - # remove whitespace again: prevents "Foo_bar_#" - # becoming "Foo_bar_" - $dbkey = preg_replace( '/_*$/', '', $dbkey ); - } - - # Reject illegal characters. - # - if ( preg_match( $rxTc, $dbkey ) ) { - return false; - } - - /** - * Pages with "/./" or "/../" appearing in the URLs will often be un- - * reachable due to the way web browsers deal with 'relative' URLs. - * Also, they conflict with subpage syntax. Forbid them explicitly. - */ - if ( strpos( $dbkey, '.' ) !== false && - ( $dbkey === '.' || $dbkey === '..' || - strpos( $dbkey, './' ) === 0 || - strpos( $dbkey, '../' ) === 0 || - strpos( $dbkey, '/./' ) !== false || - strpos( $dbkey, '/../' ) !== false || - substr( $dbkey, -2 ) == '/.' || - substr( $dbkey, -3 ) == '/..' ) ) - { - return false; - } - - /** - * Magic tilde sequences? Nu-uh! - */ - if ( strpos( $dbkey, '~~~' ) !== false ) { - return false; - } - - /** - * Limit the size of titles to 255 bytes. - * This is typically the size of the underlying database field. - * We make an exception for special pages, which don't need to be stored - * in the database, and may edge over 255 bytes due to subpage syntax - * for long titles, e.g. [[Special:Block/Long name]] - */ - if ( ( $this->mNamespace != NS_SPECIAL && strlen( $dbkey ) > 255 ) || - strlen( $dbkey ) > 512 ) - { - return false; - } - - /** - * Normally, all wiki links are forced to have - * an initial capital letter so [[foo]] and [[Foo]] - * point to the same place. - * - * Don't force it for interwikis, since the other - * site might be case-sensitive. - */ - $this->mUserCaseDBKey = $dbkey; - if ( $this->mInterwiki == '' ) { - $dbkey = self::capitalize( $dbkey, $this->mNamespace ); - } - - /** - * Can't make a link to a namespace alone... - * "empty" local links can only be self-links - * with a fragment identifier. - */ - if ( $dbkey == '' && - $this->mInterwiki == '' && - $this->mNamespace != NS_MAIN ) { - return false; - } - // Allow IPv6 usernames to start with '::' by canonicalizing IPv6 titles. - // IP names are not allowed for accounts, and can only be referring to - // edits from the IP. Given '::' abbreviations and caps/lowercaps, - // there are numerous ways to present the same IP. Having sp:contribs scan - // them all is silly and having some show the edits and others not is - // inconsistent. Same for talk/userpages. Keep them normalized instead. - $dbkey = ( $this->mNamespace == NS_USER || $this->mNamespace == NS_USER_TALK ) ? - IP::sanitizeIP( $dbkey ) : $dbkey; - // Any remaining initial :s are illegal. - if ( $dbkey !== '' && ':' == $dbkey { 0 } ) { - return false; - } - - # Fill fields - $this->mDbkeyform = $dbkey; - $this->mUrlform = wfUrlencode( $dbkey ); - - $this->mTextform = str_replace( '_', ' ', $dbkey ); return true; } /** - * Set the fragment for this title. Removes the first character from the - * specified fragment before setting, so it assumes you're passing it with - * an initial "#". + * Get an array of Title objects linking to this Title + * Also stores the IDs in the link cache. * - * Deprecated for public use, use Title::makeTitle() with fragment parameter. - * Still in active use privately. + * WARNING: do not use this function on arbitrary user-supplied titles! + * On heavily-used templates it will max out the memory. * - * @param $fragment \type{\string} text + * @param array $options May be FOR UPDATE + * @param string $table Table name + * @param string $prefix Fields prefix + * @return Title[] Array of Title objects linking here */ - public function setFragment( $fragment ) { - $this->mFragment = str_replace( '_', ' ', substr( $fragment, 1 ) ); - } + public function getLinksTo( $options = [], $table = 'pagelinks', $prefix = 'pl' ) { + if ( count( $options ) > 0 ) { + $db = wfGetDB( DB_MASTER ); + } else { + $db = wfGetDB( DB_REPLICA ); + } - /** - * Get a Title object associated with the talk page of this article - * - * @return Title the object for the talk page - */ - public function getTalkPage() { - return Title::makeTitle( MWNamespace::getTalk( $this->getNamespace() ), $this->getDBkey() ); + $res = $db->select( + [ 'page', $table ], + self::getSelectFields(), + [ + "{$prefix}_from=page_id", + "{$prefix}_namespace" => $this->getNamespace(), + "{$prefix}_title" => $this->getDBkey() ], + __METHOD__, + $options + ); + + $retVal = []; + if ( $res->numRows() ) { + $linkCache = LinkCache::singleton(); + foreach ( $res as $row ) { + $titleObj = self::makeTitle( $row->page_namespace, $row->page_title ); + if ( $titleObj ) { + $linkCache->addGoodLinkObjFromRow( $titleObj, $row ); + $retVal[] = $titleObj; + } + } + } + return $retVal; } /** - * Get a title object associated with the subject page of this - * talk page + * Get an array of Title objects using this Title as a template + * Also stores the IDs in the link cache. + * + * WARNING: do not use this function on arbitrary user-supplied titles! + * On heavily-used templates it will max out the memory. * - * @return Title the object for the subject page + * @param array $options Query option to Database::select() + * @return Title[] Array of Title the Title objects linking here */ - public function getSubjectPage() { - // Is this the same title? - $subjectNS = MWNamespace::getSubject( $this->getNamespace() ); - if ( $this->getNamespace() == $subjectNS ) { - return $this; - } - return Title::makeTitle( $subjectNS, $this->getDBkey() ); + public function getTemplateLinksTo( $options = [] ) { + return $this->getLinksTo( $options, 'templatelinks', 'tl' ); } /** - * Get an array of Title objects linking to this Title + * Get an array of Title objects linked from this Title * Also stores the IDs in the link cache. * * WARNING: do not use this function on arbitrary user-supplied titles! * On heavily-used templates it will max out the memory. * - * @param $options Array: may be FOR UPDATE - * @param $table String: table name - * @param $prefix String: fields prefix - * @return \type{\arrayof{Title}} the Title objects linking here + * @param array $options Query option to Database::select() + * @param string $table Table name + * @param string $prefix Fields prefix + * @return array Array of Title objects linking here */ - public function getLinksTo( $options = array(), $table = 'pagelinks', $prefix = 'pl' ) { - $linkCache = LinkCache::singleton(); + public function getLinksFrom( $options = [], $table = 'pagelinks', $prefix = 'pl' ) { + $id = $this->getArticleID(); - if ( count( $options ) > 0 ) { - $db = wfGetDB( DB_MASTER ); - } else { - $db = wfGetDB( DB_SLAVE ); + # If the page doesn't exist; there can't be any link from this page + if ( !$id ) { + return []; } + $db = wfGetDB( DB_REPLICA ); + + $blNamespace = "{$prefix}_namespace"; + $blTitle = "{$prefix}_title"; + $res = $db->select( - array( 'page', $table ), - array( 'page_namespace', 'page_title', 'page_id', 'page_len', 'page_is_redirect', 'page_latest' ), - array( - "{$prefix}_from=page_id", - "{$prefix}_namespace" => $this->getNamespace(), - "{$prefix}_title" => $this->getDBkey() ), + [ $table, 'page' ], + array_merge( + [ $blNamespace, $blTitle ], + WikiPage::selectFields() + ), + [ "{$prefix}_from" => $id ], __METHOD__, - $options + $options, + [ 'page' => [ + 'LEFT JOIN', + [ "page_namespace=$blNamespace", "page_title=$blTitle" ] + ] ] ); - $retVal = array(); - if ( $db->numRows( $res ) ) { - foreach ( $res as $row ) { - $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ); - if ( $titleObj ) { - $linkCache->addGoodLinkObj( $row->page_id, $titleObj, $row->page_len, $row->page_is_redirect, $row->page_latest ); - $retVal[] = $titleObj; - } + $retVal = []; + $linkCache = LinkCache::singleton(); + foreach ( $res as $row ) { + if ( $row->page_id ) { + $titleObj = self::newFromRow( $row ); + } else { + $titleObj = self::makeTitle( $row->$blNamespace, $row->$blTitle ); + $linkCache->addBadLinkObj( $titleObj ); } + $retVal[] = $titleObj; } + return $retVal; } /** - * Get an array of Title objects using this Title as a template + * Get an array of Title objects used on this Title as a template * Also stores the IDs in the link cache. * * WARNING: do not use this function on arbitrary user-supplied titles! * On heavily-used templates it will max out the memory. * - * @param $options Array: may be FOR UPDATE - * @return \type{\arrayof{Title}} the Title objects linking here + * @param array $options May be FOR UPDATE + * @return Title[] Array of Title the Title objects used here */ - public function getTemplateLinksTo( $options = array() ) { - return $this->getLinksTo( $options, 'templatelinks', 'tl' ); + public function getTemplateLinksFrom( $options = [] ) { + return $this->getLinksFrom( $options, 'templatelinks', 'tl' ); } /** - * Get an array of Title objects referring to non-existent articles linked from this page + * Get an array of Title objects referring to non-existent articles linked + * from this page. * - * @todo check if needed (used only in SpecialBrokenRedirects.php, and should use redirect table in this case) - * @return \type{\arrayof{Title}} the Title objects + * @todo check if needed (used only in SpecialBrokenRedirects.php, and + * should use redirect table in this case). + * @return Title[] Array of Title the Title objects */ public function getBrokenLinksFrom() { - if ( $this->getArticleId() == 0 ) { + if ( $this->getArticleID() == 0 ) { # All links from article ID 0 are false positives - return array(); + return []; } - $dbr = wfGetDB( DB_SLAVE ); + $dbr = wfGetDB( DB_REPLICA ); $res = $dbr->select( - array( 'page', 'pagelinks' ), - array( 'pl_namespace', 'pl_title' ), - array( - 'pl_from' => $this->getArticleId(), + [ 'page', 'pagelinks' ], + [ 'pl_namespace', 'pl_title' ], + [ + 'pl_from' => $this->getArticleID(), 'page_namespace IS NULL' - ), - __METHOD__, array(), - array( - 'page' => array( + ], + __METHOD__, [], + [ + 'page' => [ 'LEFT JOIN', - array( 'pl_namespace=page_namespace', 'pl_title=page_title' ) - ) - ) + [ 'pl_namespace=page_namespace', 'pl_title=page_title' ] + ] + ] ); - $retVal = array(); + $retVal = []; foreach ( $res as $row ) { - $retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title ); + $retVal[] = self::makeTitle( $row->pl_namespace, $row->pl_title ); } return $retVal; } - /** - * Get a list of URLs to purge from the Squid cache when this + * Get a list of URLs to purge from the CDN cache when this * page changes * - * @return \type{\arrayof{\string}} the URLs + * @return string[] Array of String the URLs */ - public function getSquidURLs() { - global $wgContLang; - - $urls = array( + public function getCdnUrls() { + $urls = [ $this->getInternalURL(), $this->getInternalURL( 'action=history' ) - ); + ]; - // purge variant urls as well - if ( $wgContLang->hasVariants() ) { - $variants = $wgContLang->getVariants(); + $pageLang = $this->getPageLanguage(); + if ( $pageLang->hasVariants() ) { + $variants = $pageLang->getVariants(); foreach ( $variants as $vCode ) { - $urls[] = $this->getInternalURL( '', $vCode ); + $urls[] = $this->getInternalURL( $vCode ); } } + // If we are looking at a css/js user subpage, purge the action=raw. + if ( $this->isJsSubpage() ) { + $urls[] = $this->getInternalURL( 'action=raw&ctype=text/javascript' ); + } elseif ( $this->isCssSubpage() ) { + $urls[] = $this->getInternalURL( 'action=raw&ctype=text/css' ); + } + + Hooks::run( 'TitleSquidURLs', [ $this, &$urls ] ); return $urls; } /** - * Purge all applicable Squid URLs + * @deprecated since 1.27 use getCdnUrls() */ - public function purgeSquid() { - global $wgUseSquid; - if ( $wgUseSquid ) { - $urls = $this->getSquidURLs(); - $u = new SquidUpdate( $urls ); - $u->doUpdate(); - } + public function getSquidURLs() { + return $this->getCdnUrls(); } /** - * Move this page without authentication - * - * @param $nt \type{Title} the new page Title - * @return \type{\mixed} true on success, getUserPermissionsErrors()-like array on failure + * Purge all applicable CDN URLs */ - public function moveNoAuth( &$nt ) { - return $this->moveTo( $nt, false ); + public function purgeSquid() { + DeferredUpdates::addUpdate( + new CdnCacheUpdate( $this->getCdnUrls() ), + DeferredUpdates::PRESEND + ); } /** * Check whether a given move operation would be valid. * Returns true if ok, or a getUserPermissionsErrors()-like array otherwise * - * @param $nt \type{Title} the new title - * @param $auth \type{\bool} indicates whether $wgUser's permissions - * should be checked - * @param $reason \type{\string} is the log summary of the move, used for spam checking - * @return \type{\mixed} True on success, getUserPermissionsErrors()-like array on failure + * @deprecated since 1.25, use MovePage's methods instead + * @param Title &$nt The new title + * @param bool $auth Whether to check user permissions (uses $wgUser) + * @param string $reason Is the log summary of the move, used for spam checking + * @return array|bool True on success, getUserPermissionsErrors()-like array on failure */ public function isValidMoveOperation( &$nt, $auth = true, $reason = '' ) { global $wgUser; - $errors = array(); - if ( !$nt ) { + if ( !( $nt instanceof Title ) ) { // Normally we'd add this to $errors, but we'll get // lots of syntax errors if $nt is not an object - return array( array( 'badtitletext' ) ); - } - if ( $this->equals( $nt ) ) { - $errors[] = array( 'selfmove' ); - } - if ( !$this->isMovable() ) { - $errors[] = array( 'immobile-source-namespace', $this->getNsText() ); - } - if ( $nt->getInterwiki() != '' ) { - $errors[] = array( 'immobile-target-namespace-iw' ); - } - if ( !$nt->isMovable() ) { - $errors[] = array( 'immobile-target-namespace', $nt->getNsText() ); - } - - $oldid = $this->getArticleID(); - $newid = $nt->getArticleID(); - - if ( strlen( $nt->getDBkey() ) < 1 ) { - $errors[] = array( 'articleexists' ); - } - if ( ( $this->getDBkey() == '' ) || - ( !$oldid ) || - ( $nt->getDBkey() == '' ) ) { - $errors[] = array( 'badarticleerror' ); - } - - // Image-specific checks - if ( $this->getNamespace() == NS_FILE ) { - if ( $nt->getNamespace() != NS_FILE ) { - $errors[] = array( 'imagenocrossnamespace' ); - } - $file = wfLocalFile( $this ); - if ( $file->exists() ) { - if ( $nt->getText() != wfStripIllegalFilenameChars( $nt->getText() ) ) { - $errors[] = array( 'imageinvalidfilename' ); - } - if ( !File::checkExtensionCompatibility( $file, $nt->getDBkey() ) ) { - $errors[] = array( 'imagetypemismatch' ); - } - } - $destfile = wfLocalFile( $nt ); - if ( !$wgUser->isAllowed( 'reupload-shared' ) && !$destfile->exists() && wfFindFile( $nt ) ) { - $errors[] = array( 'file-exists-sharedrepo' ); - } - } - - if ( $nt->getNamespace() == NS_FILE && $this->getNamespace() != NS_FILE ) { - $errors[] = array( 'nonfile-cannot-move-to-file' ); + return [ [ 'badtitletext' ] ]; } + $mp = new MovePage( $this, $nt ); + $errors = $mp->isValidMove()->getErrorsArray(); if ( $auth ) { - $errors = wfMergeErrorArrays( $errors, - $this->getUserPermissionsErrors( 'move', $wgUser ), - $this->getUserPermissionsErrors( 'edit', $wgUser ), - $nt->getUserPermissionsErrors( 'move-target', $wgUser ), - $nt->getUserPermissionsErrors( 'edit', $wgUser ) ); + $errors = wfMergeErrorArrays( + $errors, + $mp->checkPermissions( $wgUser, $reason )->getErrorsArray() + ); } - $match = EditPage::matchSummarySpamRegex( $reason ); - if ( $match !== false ) { - // This is kind of lame, won't display nice - $errors[] = array( 'spamprotectiontext' ); - } + return $errors ?: true; + } - $err = null; - if ( !wfRunHooks( 'AbortMove', array( $this, $nt, $wgUser, &$err, $reason ) ) ) { - $errors[] = array( 'hookaborted', $err ); - } + /** + * Check if the requested move target is a valid file move target + * @todo move this to MovePage + * @param Title $nt Target title + * @return array List of errors + */ + protected function validateFileMoveOperation( $nt ) { + global $wgUser; - # The move is allowed only if (1) the target doesn't exist, or - # (2) the target is a redirect to the source, and has no history - # (so we can undo bad moves right after they're done). + $errors = []; - if ( 0 != $newid ) { # Target exists; check for validity - if ( !$this->isValidMoveTarget( $nt ) ) { - $errors[] = array( 'articleexists' ); - } - } else { - $tp = $nt->getTitleProtection(); - $right = ( $tp['pt_create_perm'] == 'sysop' ) ? 'protect' : $tp['pt_create_perm']; - if ( $tp and !$wgUser->isAllowed( $right ) ) { - $errors[] = array( 'cantmove-titleprotected' ); - } - } - if ( empty( $errors ) ) { - return true; + $destFile = wfLocalFile( $nt ); + $destFile->load( File::READ_LATEST ); + if ( !$wgUser->isAllowed( 'reupload-shared' ) + && !$destFile->exists() && wfFindFile( $nt ) + ) { + $errors[] = [ 'file-exists-sharedrepo' ]; } + return $errors; } /** * Move a title to a new location * - * @param $nt \type{Title} the new title - * @param $auth \type{\bool} indicates whether $wgUser's permissions + * @deprecated since 1.25, use the MovePage class instead + * @param Title &$nt The new title + * @param bool $auth Indicates whether $wgUser's permissions * should be checked - * @param $reason \type{\string} The reason for the move - * @param $createRedirect \type{\bool} Whether to create a redirect from the old title to the new title. + * @param string $reason The reason for the move + * @param bool $createRedirect Whether to create a redirect from the old title to the new title. * Ignored if the user doesn't have the suppressredirect right. - * @return \type{\mixed} true on success, getUserPermissionsErrors()-like array on failure + * @param array $changeTags Applied to the entry in the move log and redirect page revision + * @return array|bool True on success, getUserPermissionsErrors()-like array on failure */ - public function moveTo( &$nt, $auth = true, $reason = '', $createRedirect = true ) { + public function moveTo( &$nt, $auth = true, $reason = '', $createRedirect = true, + array $changeTags = [] + ) { + global $wgUser; $err = $this->isValidMoveOperation( $nt, $auth, $reason ); if ( is_array( $err ) ) { + // Auto-block user's IP if the account was "hard" blocked + $wgUser->spreadAnyEditBlock(); return $err; } - - // If it is a file, move it first. It is done before all other moving stuff is done because it's hard to revert - $dbw = wfGetDB( DB_MASTER ); - if ( $this->getNamespace() == NS_FILE ) { - $file = wfLocalFile( $this ); - if ( $file->exists() ) { - $status = $file->move( $nt ); - if ( !$status->isOk() ) { - return $status->getErrorsArray(); - } - } - } - - $dbw->begin(); # If $file was a LocalFile, its transaction would have closed our own. - $pageid = $this->getArticleID( GAID_FOR_UPDATE ); - $protected = $this->isProtected(); - if ( $nt->exists() ) { - $err = $this->moveOverExistingRedirect( $nt, $reason, $createRedirect ); - $pageCountChange = ( $createRedirect ? 0 : -1 ); - } else { # Target didn't exist, do normal move. - $err = $this->moveToNewTitle( $nt, $reason, $createRedirect ); - $pageCountChange = ( $createRedirect ? 1 : 0 ); - } - - if ( is_array( $err ) ) { - # FIXME: What about the File we have already moved? - $dbw->rollback(); - return $err; - } - $redirid = $this->getArticleID(); - - // Refresh the sortkey for this row. Be careful to avoid resetting - // cl_timestamp, which may disturb time-based lists on some sites. - $prefix = $dbw->selectField( - 'categorylinks', - 'cl_sortkey_prefix', - array( 'cl_from' => $pageid ), - __METHOD__ - ); - $dbw->update( 'categorylinks', - array( - 'cl_sortkey' => Collation::singleton()->getSortKey( - $nt->getCategorySortkey( $prefix ) ), - 'cl_timestamp=cl_timestamp' ), - array( 'cl_from' => $pageid ), - __METHOD__ ); - - if ( $protected ) { - # Protect the redirect title as the title used to be... - $dbw->insertSelect( 'page_restrictions', 'page_restrictions', - array( - 'pr_page' => $redirid, - 'pr_type' => 'pr_type', - 'pr_level' => 'pr_level', - 'pr_cascade' => 'pr_cascade', - 'pr_user' => 'pr_user', - 'pr_expiry' => 'pr_expiry' - ), - array( 'pr_page' => $pageid ), - __METHOD__, - array( 'IGNORE' ) - ); - # Update the protection log - $log = new LogPage( 'protect' ); - $comment = wfMsgForContent( 'prot_1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ); - if ( $reason ) { - $comment .= wfMsgForContent( 'colon-separator' ) . $reason; - } - $log->addEntry( 'move_prot', $nt, $comment, array( $this->getPrefixedText() ) ); // FIXME: $params? - } - - # Update watchlists - $oldnamespace = $this->getNamespace() & ~1; - $newnamespace = $nt->getNamespace() & ~1; - $oldtitle = $this->getDBkey(); - $newtitle = $nt->getDBkey(); - - if ( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) { - WatchedItem::duplicateEntries( $this, $nt ); - } - - # Update search engine - $u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() ); - $u->doUpdate(); - $u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' ); - $u->doUpdate(); - - $dbw->commit(); - - # Update site_stats - if ( $this->isContentPage() && !$nt->isContentPage() ) { - # No longer a content page - # Not viewed, edited, removing - $u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange ); - } elseif ( !$this->isContentPage() && $nt->isContentPage() ) { - # Now a content page - # Not viewed, edited, adding - $u = new SiteStatsUpdate( 0, 1, + 1, $pageCountChange ); - } elseif ( $pageCountChange ) { - # Redirect added - $u = new SiteStatsUpdate( 0, 0, 0, 1 ); - } else { - # Nothing special - $u = false; - } - if ( $u ) { - $u->doUpdate(); - } - # Update message cache for interface messages - global $wgMessageCache; - if ( $this->getNamespace() == NS_MEDIAWIKI ) { - # @bug 17860: old article can be deleted, if this the case, - # delete it from message cache - if ( $this->getArticleID() === 0 ) { - $wgMessageCache->replace( $this->getDBkey(), false ); - } else { - $oldarticle = new Article( $this ); - $wgMessageCache->replace( $this->getDBkey(), $oldarticle->getContent() ); - } - } - if ( $nt->getNamespace() == NS_MEDIAWIKI ) { - $newarticle = new Article( $nt ); - $wgMessageCache->replace( $nt->getDBkey(), $newarticle->getContent() ); - } - - global $wgUser; - wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) ); - return true; - } - - /** - * Move page to a title which is at present a redirect to the - * source page - * - * @param $nt \type{Title} the page to move to, which should currently - * be a redirect - * @param $reason \type{\string} The reason for the move - * @param $createRedirect \type{\bool} Whether to leave a redirect at the old title. - * Ignored if the user doesn't have the suppressredirect right - */ - private function moveOverExistingRedirect( &$nt, $reason = '', $createRedirect = true ) { - global $wgUseSquid, $wgUser, $wgContLang; - - $comment = wfMsgForContent( '1movedto2_redir', $this->getPrefixedText(), $nt->getPrefixedText() ); - - if ( $reason ) { - $comment .= wfMsgForContent( 'colon-separator' ) . $reason; - } - # Truncate for whole multibyte characters. +5 bytes for ellipsis - $comment = $wgContLang->truncate( $comment, 250 ); - - $now = wfTimestampNow(); - $newid = $nt->getArticleID(); - $oldid = $this->getArticleID(); - $latest = $this->getLatestRevID(); - - $dbw = wfGetDB( DB_MASTER ); - - $rcts = $dbw->timestamp( $nt->getEarliestRevTime() ); - $newns = $nt->getNamespace(); - $newdbk = $nt->getDBkey(); - - # Delete the old redirect. We don't save it to history since - # by definition if we've got here it's rather uninteresting. - # We have to remove it so that the next step doesn't trigger - # a conflict on the unique namespace+title index... - $dbw->delete( 'page', array( 'page_id' => $newid ), __METHOD__ ); - if ( !$dbw->cascadingDeletes() ) { - $dbw->delete( 'revision', array( 'rev_page' => $newid ), __METHOD__ ); - global $wgUseTrackbacks; - if ( $wgUseTrackbacks ) { - $dbw->delete( 'trackbacks', array( 'tb_page' => $newid ), __METHOD__ ); - } - $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), __METHOD__ ); - $dbw->delete( 'imagelinks', array( 'il_from' => $newid ), __METHOD__ ); - $dbw->delete( 'categorylinks', array( 'cl_from' => $newid ), __METHOD__ ); - $dbw->delete( 'templatelinks', array( 'tl_from' => $newid ), __METHOD__ ); - $dbw->delete( 'externallinks', array( 'el_from' => $newid ), __METHOD__ ); - $dbw->delete( 'langlinks', array( 'll_from' => $newid ), __METHOD__ ); - $dbw->delete( 'redirect', array( 'rd_from' => $newid ), __METHOD__ ); - } - // If the redirect was recently created, it may have an entry in recentchanges still - $dbw->delete( 'recentchanges', - array( 'rc_timestamp' => $rcts, 'rc_namespace' => $newns, 'rc_title' => $newdbk, 'rc_new' => 1 ), - __METHOD__ - ); - - # Save a null revision in the page's history notifying of the move - $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true ); - $nullRevId = $nullRevision->insertOn( $dbw ); - - $article = new Article( $this ); - wfRunHooks( 'NewRevisionFromEditComplete', array( $article, $nullRevision, $latest, $wgUser ) ); - - # Change the name of the target page: - $dbw->update( 'page', - /* SET */ array( - 'page_touched' => $dbw->timestamp( $now ), - 'page_namespace' => $nt->getNamespace(), - 'page_title' => $nt->getDBkey(), - 'page_latest' => $nullRevId, - ), - /* WHERE */ array( 'page_id' => $oldid ), - __METHOD__ - ); - $nt->resetArticleID( $oldid ); - - # Recreate the redirect, this time in the other direction. - if ( $createRedirect || !$wgUser->isAllowed( 'suppressredirect' ) ) { - $mwRedir = MagicWord::get( 'redirect' ); - $redirectText = $mwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n"; - $redirectArticle = new Article( $this ); - $newid = $redirectArticle->insertOn( $dbw ); - $redirectRevision = new Revision( array( - 'page' => $newid, - 'comment' => $comment, - 'text' => $redirectText ) ); - $redirectRevision->insertOn( $dbw ); - $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 ); - - wfRunHooks( 'NewRevisionFromEditComplete', array( $redirectArticle, $redirectRevision, false, $wgUser ) ); - - # Now, we record the link from the redirect to the new title. - # It should have no other outgoing links... - $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), __METHOD__ ); - $dbw->insert( 'pagelinks', - array( - 'pl_from' => $newid, - 'pl_namespace' => $nt->getNamespace(), - 'pl_title' => $nt->getDBkey() ), - __METHOD__ ); - $redirectSuppressed = false; - } else { - $this->resetArticleID( 0 ); - $redirectSuppressed = true; - } - - # Log the move - $log = new LogPage( 'move' ); - $log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText(), 2 => $redirectSuppressed ) ); - - # Purge squid - if ( $wgUseSquid ) { - $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() ); - $u = new SquidUpdate( $urls ); - $u->doUpdate(); - } - - } - - /** - * Move page to non-existing title. - * - * @param $nt \type{Title} the new Title - * @param $reason \type{\string} The reason for the move - * @param $createRedirect \type{\bool} Whether to create a redirect from the old title to the new title - * Ignored if the user doesn't have the suppressredirect right - */ - private function moveToNewTitle( &$nt, $reason = '', $createRedirect = true ) { - global $wgUser, $wgContLang; - - $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ); - if ( $reason ) { - $comment .= wfMsgExt( 'colon-separator', - array( 'escapenoentities', 'content' ) ); - $comment .= $reason; - } - # Truncate for whole multibyte characters. +5 bytes for ellipsis - $comment = $wgContLang->truncate( $comment, 250 ); - - $oldid = $this->getArticleID(); - $latest = $this->getLatestRevId(); - - $dbw = wfGetDB( DB_MASTER ); - $now = $dbw->timestamp(); - - # Save a null revision in the page's history notifying of the move - $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true ); - if ( !is_object( $nullRevision ) ) { - throw new MWException( 'No valid null revision produced in ' . __METHOD__ ); + // Check suppressredirect permission + if ( $auth && !$wgUser->isAllowed( 'suppressredirect' ) ) { + $createRedirect = true; } - $nullRevId = $nullRevision->insertOn( $dbw ); - - $article = new Article( $this ); - wfRunHooks( 'NewRevisionFromEditComplete', array( $article, $nullRevision, $latest, $wgUser ) ); - # Rename page entry - $dbw->update( 'page', - /* SET */ array( - 'page_touched' => $now, - 'page_namespace' => $nt->getNamespace(), - 'page_title' => $nt->getDBkey(), - 'page_latest' => $nullRevId, - ), - /* WHERE */ array( 'page_id' => $oldid ), - __METHOD__ - ); - $nt->resetArticleID( $oldid ); - - if ( $createRedirect || !$wgUser->isAllowed( 'suppressredirect' ) ) { - # Insert redirect - $mwRedir = MagicWord::get( 'redirect' ); - $redirectText = $mwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n"; - $redirectArticle = new Article( $this ); - $newid = $redirectArticle->insertOn( $dbw ); - $redirectRevision = new Revision( array( - 'page' => $newid, - 'comment' => $comment, - 'text' => $redirectText ) ); - $redirectRevision->insertOn( $dbw ); - $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 ); - - wfRunHooks( 'NewRevisionFromEditComplete', array( $redirectArticle, $redirectRevision, false, $wgUser ) ); - - # Record the just-created redirect's linking to the page - $dbw->insert( 'pagelinks', - array( - 'pl_from' => $newid, - 'pl_namespace' => $nt->getNamespace(), - 'pl_title' => $nt->getDBkey() ), - __METHOD__ ); - $redirectSuppressed = false; + $mp = new MovePage( $this, $nt ); + $status = $mp->move( $wgUser, $reason, $createRedirect, $changeTags ); + if ( $status->isOK() ) { + return true; } else { - $this->resetArticleID( 0 ); - $redirectSuppressed = true; + return $status->getErrorsArray(); } - - # Log the move - $log = new LogPage( 'move' ); - $log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText(), 2 => $redirectSuppressed ) ); - - # Purge caches as per article creation - Article::onArticleCreate( $nt ); - - # Purge old title from squid - # The new title, and links to the new title, are purged in Article::onArticleCreate() - $this->purgeSquid(); } /** * Move this page's subpages to be subpages of $nt * - * @param $nt Title Move target - * @param $auth bool Whether $wgUser's permissions should be checked - * @param $reason string The reason for the move - * @param $createRedirect bool Whether to create redirects from the old subpages to the new ones - * Ignored if the user doesn't have the 'suppressredirect' right - * @return mixed array with old page titles as keys, and strings (new page titles) or - * arrays (errors) as values, or an error array with numeric indices if no pages were moved - */ - public function moveSubpages( $nt, $auth = true, $reason = '', $createRedirect = true ) { + * @param Title $nt Move target + * @param bool $auth Whether $wgUser's permissions should be checked + * @param string $reason The reason for the move + * @param bool $createRedirect Whether to create redirects from the old subpages to + * the new ones Ignored if the user doesn't have the 'suppressredirect' right + * @param array $changeTags Applied to the entry in the move log and redirect page revision + * @return array Array with old page titles as keys, and strings (new page titles) or + * getUserPermissionsErrors()-like arrays (errors) as values, or a + * getUserPermissionsErrors()-like error array with numeric indices if + * no pages were moved + */ + public function moveSubpages( $nt, $auth = true, $reason = '', $createRedirect = true, + array $changeTags = [] + ) { global $wgMaximumMovedPages; // Check permissions if ( !$this->userCan( 'move-subpages' ) ) { - return array( 'cant-move-subpages' ); + return [ + [ 'cant-move-subpages' ], + ]; } // Do the source and target namespaces support subpages? if ( !MWNamespace::hasSubpages( $this->getNamespace() ) ) { - return array( 'namespace-nosubpages', - MWNamespace::getCanonicalName( $this->getNamespace() ) ); + return [ + [ 'namespace-nosubpages', MWNamespace::getCanonicalName( $this->getNamespace() ) ], + ]; } if ( !MWNamespace::hasSubpages( $nt->getNamespace() ) ) { - return array( 'namespace-nosubpages', - MWNamespace::getCanonicalName( $nt->getNamespace() ) ); + return [ + [ 'namespace-nosubpages', MWNamespace::getCanonicalName( $nt->getNamespace() ) ], + ]; } $subpages = $this->getSubpages( $wgMaximumMovedPages + 1 ); - $retval = array(); + $retval = []; $count = 0; foreach ( $subpages as $oldSubpage ) { $count++; if ( $count > $wgMaximumMovedPages ) { - $retval[$oldSubpage->getPrefixedTitle()] = - array( 'movepage-max-pages', - $wgMaximumMovedPages ); + $retval[$oldSubpage->getPrefixedText()] = [ + [ 'movepage-max-pages', $wgMaximumMovedPages ], + ]; break; } // We don't know whether this function was called before // or after moving the root page, so check both // $this and $nt - if ( $oldSubpage->getArticleId() == $this->getArticleId() || - $oldSubpage->getArticleID() == $nt->getArticleId() ) - { + if ( $oldSubpage->getArticleID() == $this->getArticleID() + || $oldSubpage->getArticleID() == $nt->getArticleID() + ) { // When moving a page to a subpage of itself, // don't move it twice continue; } $newPageName = preg_replace( '#^' . preg_quote( $this->getDBkey(), '#' ) . '#', - StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # bug 21234 + StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # T23234 $oldSubpage->getDBkey() ); if ( $oldSubpage->isTalkPage() ) { $newNs = $nt->getTalkPage()->getNamespace(); } else { $newNs = $nt->getSubjectPage()->getNamespace(); } - # Bug 14385: we need makeTitleSafe because the new page names may + # T16385: we need makeTitleSafe because the new page names may # be longer than 255 characters. - $newSubpage = Title::makeTitleSafe( $newNs, $newPageName ); + $newSubpage = self::makeTitleSafe( $newNs, $newPageName ); - $success = $oldSubpage->moveTo( $newSubpage, $auth, $reason, $createRedirect ); + $success = $oldSubpage->moveTo( $newSubpage, $auth, $reason, $createRedirect, $changeTags ); if ( $success === true ) { $retval[$oldSubpage->getPrefixedText()] = $newSubpage->getPrefixedText(); } else { @@ -3488,34 +3935,46 @@ class Title { * Checks if this page is just a one-rev redirect. * Adds lock, so don't use just for light purposes. * - * @return \type{\bool} + * @return bool */ public function isSingleRevRedirect() { + global $wgContentHandlerUseDB; + $dbw = wfGetDB( DB_MASTER ); + # Is it a redirect? + $fields = [ 'page_is_redirect', 'page_latest', 'page_id' ]; + if ( $wgContentHandlerUseDB ) { + $fields[] = 'page_content_model'; + } + $row = $dbw->selectRow( 'page', - array( 'page_is_redirect', 'page_latest', 'page_id' ), + $fields, $this->pageCond(), __METHOD__, - array( 'FOR UPDATE' ) + [ 'FOR UPDATE' ] ); # Cache some fields we may want $this->mArticleID = $row ? intval( $row->page_id ) : 0; $this->mRedirect = $row ? (bool)$row->page_is_redirect : false; $this->mLatestID = $row ? intval( $row->page_latest ) : false; + $this->mContentModel = $row && isset( $row->page_content_model ) + ? strval( $row->page_content_model ) + : false; + if ( !$this->mRedirect ) { return false; } # Does the article have a history? - $row = $dbw->selectField( array( 'page', 'revision' ), + $row = $dbw->selectField( [ 'page', 'revision' ], 'rev_id', - array( 'page_namespace' => $this->getNamespace(), + [ 'page_namespace' => $this->getNamespace(), 'page_title' => $this->getDBkey(), 'page_id=rev_page', 'page_latest != rev_id' - ), + ], __METHOD__, - array( 'FOR UPDATE' ) + [ 'FOR UPDATE' ] ); # Return true if there was no history return ( $row === false ); @@ -3525,13 +3984,15 @@ class Title { * Checks if $this can be moved to a given Title * - Selects for update, so don't call it unless you mean business * - * @param $nt \type{Title} the new title to check - * @return \type{\bool} TRUE or FALSE + * @deprecated since 1.25, use MovePage's methods instead + * @param Title $nt The new title to check + * @return bool */ public function isValidMoveTarget( $nt ) { # Is it an existing file? if ( $nt->getNamespace() == NS_FILE ) { $file = wfLocalFile( $nt ); + $file->load( File::READ_LATEST ); if ( $file->exists() ) { wfDebug( __METHOD__ . ": file exists\n" ); return false; @@ -3543,63 +4004,62 @@ class Title { return false; } # Get the article text - $rev = Revision::newFromTitle( $nt ); - $text = $rev->getText(); + $rev = Revision::newFromTitle( $nt, false, Revision::READ_LATEST ); + if ( !is_object( $rev ) ) { + return false; + } + $content = $rev->getContent(); # Does the redirect point to the source? # Or is it a broken self-redirect, usually caused by namespace collisions? - $m = array(); - if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $text, $m ) ) { - $redirTitle = Title::newFromText( $m[1] ); - if ( !is_object( $redirTitle ) || - ( $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() && - $redirTitle->getPrefixedDBkey() != $nt->getPrefixedDBkey() ) ) { + $redirTitle = $content ? $content->getRedirectTarget() : null; + + if ( $redirTitle ) { + if ( $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() && + $redirTitle->getPrefixedDBkey() != $nt->getPrefixedDBkey() ) { wfDebug( __METHOD__ . ": redirect points to other page\n" ); return false; + } else { + return true; } } else { - # Fail safe - wfDebug( __METHOD__ . ": failsafe\n" ); + # Fail safe (not a redirect after all. strange.) + wfDebug( __METHOD__ . ": failsafe: database sais " . $nt->getPrefixedDBkey() . + " is a redirect, but it doesn't contain a valid redirect.\n" ); return false; } - return true; - } - - /** - * Can this title be added to a user's watchlist? - * - * @return \type{\bool} TRUE or FALSE - */ - public function isWatchable() { - return !$this->isExternal() && MWNamespace::isWatchable( $this->getNamespace() ); } /** * Get categories to which this Title belongs and return an array of * categories' names. * - * @return \type{\array} array an array of parents in the form: - * $parent => $currentarticle + * @return array Array of parents in the form: + * $parent => $currentarticle */ public function getParentCategories() { global $wgContLang; - $titlekey = $this->getArticleId(); - $dbr = wfGetDB( DB_SLAVE ); - $categorylinks = $dbr->tableName( 'categorylinks' ); + $data = []; + + $titleKey = $this->getArticleID(); + + if ( $titleKey === 0 ) { + return $data; + } - # NEW SQL - $sql = "SELECT * FROM $categorylinks" - . " WHERE cl_from='$titlekey'" - . " AND cl_from <> '0'" - . " ORDER BY cl_sortkey"; + $dbr = wfGetDB( DB_REPLICA ); - $res = $dbr->query( $sql ); - $data = array(); + $res = $dbr->select( + 'categorylinks', + 'cl_to', + [ 'cl_from' => $titleKey ], + __METHOD__ + ); - if ( $dbr->numRows( $res ) > 0 ) { + if ( $res->numRows() > 0 ) { foreach ( $res as $row ) { - // $data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$row->cl_to); - $data[$wgContLang->getNSText( NS_CATEGORY ) . ':' . $row->cl_to] = $this->getFullText(); + // $data[] = Title::newFromText($wgContLang->getNsText ( NS_CATEGORY ).':'.$row->cl_to); + $data[$wgContLang->getNsText( NS_CATEGORY ) . ':' . $row->cl_to] = $this->getFullText(); } } return $data; @@ -3608,22 +4068,22 @@ class Title { /** * Get a tree of parent categories * - * @param $children \type{\array} an array with the children in the keys, to check for circular refs - * @return \type{\array} Tree of parent categories + * @param array $children Array with the children in the keys, to check for circular refs + * @return array Tree of parent categories */ - public function getParentCategoryTree( $children = array() ) { - $stack = array(); + public function getParentCategoryTree( $children = [] ) { + $stack = []; $parents = $this->getParentCategories(); if ( $parents ) { foreach ( $parents as $parent => $current ) { if ( array_key_exists( $parent, $children ) ) { # Circular reference - $stack[$parent] = array(); + $stack[$parent] = []; } else { - $nt = Title::newFromText( $parent ); + $nt = self::newFromText( $parent ); if ( $nt ) { - $stack[$parent] = $nt->getParentCategoryTree( $children + array( $parent => 1 ) ); + $stack[$parent] = $nt->getParentCategoryTree( $children + [ $parent => 1 ] ); } } } @@ -3632,82 +4092,133 @@ class Title { return $stack; } - /** * Get an associative array for selecting this title from * the "page" table * - * @return \type{\array} Selection array + * @return array Array suitable for the $where parameter of DB::select() */ public function pageCond() { if ( $this->mArticleID > 0 ) { // PK avoids secondary lookups in InnoDB, shouldn't hurt other DBs - return array( 'page_id' => $this->mArticleID ); + return [ 'page_id' => $this->mArticleID ]; + } else { + return [ 'page_namespace' => $this->mNamespace, 'page_title' => $this->mDbkeyform ]; + } + } + + /** + * Get next/previous revision ID relative to another revision ID + * @param int $revId Revision ID. Get the revision that was before this one. + * @param int $flags Title::GAID_FOR_UPDATE + * @param string $dir 'next' or 'prev' + * @return int|bool New revision ID, or false if none exists + */ + private function getRelativeRevisionID( $revId, $flags, $dir ) { + $revId = (int)$revId; + if ( $dir === 'next' ) { + $op = '>'; + $sort = 'ASC'; + } elseif ( $dir === 'prev' ) { + $op = '<'; + $sort = 'DESC'; + } else { + throw new InvalidArgumentException( '$dir must be "next" or "prev"' ); + } + + if ( $flags & self::GAID_FOR_UPDATE ) { + $db = wfGetDB( DB_MASTER ); + } else { + $db = wfGetDB( DB_REPLICA, 'contributions' ); + } + + // Intentionally not caring if the specified revision belongs to this + // page. We only care about the timestamp. + $ts = $db->selectField( 'revision', 'rev_timestamp', [ 'rev_id' => $revId ], __METHOD__ ); + if ( $ts === false ) { + $ts = $db->selectField( 'archive', 'ar_timestamp', [ 'ar_rev_id' => $revId ], __METHOD__ ); + if ( $ts === false ) { + // Or should this throw an InvalidArgumentException or something? + return false; + } + } + $ts = $db->addQuotes( $ts ); + + $revId = $db->selectField( 'revision', 'rev_id', + [ + 'rev_page' => $this->getArticleID( $flags ), + "rev_timestamp $op $ts OR (rev_timestamp = $ts AND rev_id $op $revId)" + ], + __METHOD__, + [ + 'ORDER BY' => "rev_timestamp $sort, rev_id $sort", + 'IGNORE INDEX' => 'rev_timestamp', // Probably needed for T159319 + ] + ); + + if ( $revId === false ) { + return false; } else { - return array( 'page_namespace' => $this->mNamespace, 'page_title' => $this->mDbkeyform ); + return intval( $revId ); } } /** * Get the revision ID of the previous revision * - * @param $revId \type{\int} Revision ID. Get the revision that was before this one. - * @param $flags \type{\int} Title::GAID_FOR_UPDATE - * @return \twotypes{\int,\bool} Old revision ID, or FALSE if none exists + * @param int $revId Revision ID. Get the revision that was before this one. + * @param int $flags Title::GAID_FOR_UPDATE + * @return int|bool Old revision ID, or false if none exists */ public function getPreviousRevisionID( $revId, $flags = 0 ) { - $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE ); - return $db->selectField( 'revision', 'rev_id', - array( - 'rev_page' => $this->getArticleId( $flags ), - 'rev_id < ' . intval( $revId ) - ), - __METHOD__, - array( 'ORDER BY' => 'rev_id DESC' ) - ); + return $this->getRelativeRevisionID( $revId, $flags, 'prev' ); } /** * Get the revision ID of the next revision * - * @param $revId \type{\int} Revision ID. Get the revision that was after this one. - * @param $flags \type{\int} Title::GAID_FOR_UPDATE - * @return \twotypes{\int,\bool} Next revision ID, or FALSE if none exists + * @param int $revId Revision ID. Get the revision that was after this one. + * @param int $flags Title::GAID_FOR_UPDATE + * @return int|bool Next revision ID, or false if none exists */ public function getNextRevisionID( $revId, $flags = 0 ) { - $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE ); - return $db->selectField( 'revision', 'rev_id', - array( - 'rev_page' => $this->getArticleId( $flags ), - 'rev_id > ' . intval( $revId ) - ), - __METHOD__, - array( 'ORDER BY' => 'rev_id' ) - ); + return $this->getRelativeRevisionID( $revId, $flags, 'next' ); } /** * Get the first revision of the page * - * @param $flags \type{\int} Title::GAID_FOR_UPDATE - * @return Revision (or NULL if page doesn't exist) + * @param int $flags Title::GAID_FOR_UPDATE + * @return Revision|null If page doesn't exist */ public function getFirstRevision( $flags = 0 ) { - $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE ); - $pageId = $this->getArticleId( $flags ); - if ( !$pageId ) { - return null; - } - $row = $db->selectRow( 'revision', '*', - array( 'rev_page' => $pageId ), - __METHOD__, - array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 1 ) - ); - if ( !$row ) { - return null; - } else { - return new Revision( $row ); + $pageId = $this->getArticleID( $flags ); + if ( $pageId ) { + $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_REPLICA ); + $row = $db->selectRow( 'revision', Revision::selectFields(), + [ 'rev_page' => $pageId ], + __METHOD__, + [ + 'ORDER BY' => 'rev_timestamp ASC, rev_id ASC', + 'IGNORE INDEX' => 'rev_timestamp', // See T159319 + ] + ); + if ( $row ) { + return new Revision( $row ); + } } + return null; + } + + /** + * Get the oldest revision timestamp of this page + * + * @param int $flags Title::GAID_FOR_UPDATE + * @return string MW timestamp + */ + public function getEarliestRevTime( $flags = 0 ) { + $rev = $this->getFirstRevision( $flags ); + return $rev ? $rev->getTimestamp() : null; } /** @@ -3715,74 +4226,195 @@ class Title { * * @return bool */ - public function isNewPage() { - $dbr = wfGetDB( DB_SLAVE ); - return (bool)$dbr->selectField( 'page', 'page_is_new', $this->pageCond(), __METHOD__ ); + public function isNewPage() { + $dbr = wfGetDB( DB_REPLICA ); + return (bool)$dbr->selectField( 'page', 'page_is_new', $this->pageCond(), __METHOD__ ); + } + + /** + * Check whether the number of revisions of this page surpasses $wgDeleteRevisionsLimit + * + * @return bool + */ + public function isBigDeletion() { + global $wgDeleteRevisionsLimit; + + if ( !$wgDeleteRevisionsLimit ) { + return false; + } + + if ( $this->mIsBigDeletion === null ) { + $dbr = wfGetDB( DB_REPLICA ); + + $revCount = $dbr->selectRowCount( + 'revision', + '1', + [ 'rev_page' => $this->getArticleID() ], + __METHOD__, + [ 'LIMIT' => $wgDeleteRevisionsLimit + 1 ] + ); + + $this->mIsBigDeletion = $revCount > $wgDeleteRevisionsLimit; + } + + return $this->mIsBigDeletion; + } + + /** + * Get the approximate revision count of this page. + * + * @return int + */ + public function estimateRevisionCount() { + if ( !$this->exists() ) { + return 0; + } + + if ( $this->mEstimateRevisions === null ) { + $dbr = wfGetDB( DB_REPLICA ); + $this->mEstimateRevisions = $dbr->estimateRowCount( 'revision', '*', + [ 'rev_page' => $this->getArticleID() ], __METHOD__ ); + } + + return $this->mEstimateRevisions; } /** - * Get the oldest revision timestamp of this page + * Get the number of revisions between the given revision. + * Used for diffs and other things that really need it. * - * @return String: MW timestamp - */ - public function getEarliestRevTime() { - $dbr = wfGetDB( DB_SLAVE ); - if ( $this->exists() ) { - $min = $dbr->selectField( 'revision', - 'MIN(rev_timestamp)', - array( 'rev_page' => $this->getArticleId() ), - __METHOD__ ); - return wfTimestampOrNull( TS_MW, $min ); + * @param int|Revision $old Old revision or rev ID (first before range) + * @param int|Revision $new New revision or rev ID (first after range) + * @param int|null $max Limit of Revisions to count, will be incremented to detect truncations + * @return int Number of revisions between these revisions. + */ + public function countRevisionsBetween( $old, $new, $max = null ) { + if ( !( $old instanceof Revision ) ) { + $old = Revision::newFromTitle( $this, (int)$old ); + } + if ( !( $new instanceof Revision ) ) { + $new = Revision::newFromTitle( $this, (int)$new ); + } + if ( !$old || !$new ) { + return 0; // nothing to compare + } + $dbr = wfGetDB( DB_REPLICA ); + $conds = [ + 'rev_page' => $this->getArticleID(), + 'rev_timestamp > ' . $dbr->addQuotes( $dbr->timestamp( $old->getTimestamp() ) ), + 'rev_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( $new->getTimestamp() ) ) + ]; + if ( $max !== null ) { + return $dbr->selectRowCount( 'revision', '1', + $conds, + __METHOD__, + [ 'LIMIT' => $max + 1 ] // extra to detect truncation + ); + } else { + return (int)$dbr->selectField( 'revision', 'count(*)', $conds, __METHOD__ ); } - return null; } /** - * Get the number of revisions between the given revision IDs. + * Get the authors between the given revisions or revision IDs. * Used for diffs and other things that really need it. * - * @param $old \type{\int} Revision ID. - * @param $new \type{\int} Revision ID. - * @return \type{\int} Number of revisions between these IDs. - */ - public function countRevisionsBetween( $old, $new ) { - $dbr = wfGetDB( DB_SLAVE ); - return (int)$dbr->selectField( 'revision', 'count(*)', - 'rev_page = ' . intval( $this->getArticleId() ) . - ' AND rev_id > ' . intval( $old ) . - ' AND rev_id < ' . intval( $new ), - __METHOD__ + * @since 1.23 + * + * @param int|Revision $old Old revision or rev ID (first before range by default) + * @param int|Revision $new New revision or rev ID (first after range by default) + * @param int $limit Maximum number of authors + * @param string|array $options (Optional): Single option, or an array of options: + * 'include_old' Include $old in the range; $new is excluded. + * 'include_new' Include $new in the range; $old is excluded. + * 'include_both' Include both $old and $new in the range. + * Unknown option values are ignored. + * @return array|null Names of revision authors in the range; null if not both revisions exist + */ + public function getAuthorsBetween( $old, $new, $limit, $options = [] ) { + if ( !( $old instanceof Revision ) ) { + $old = Revision::newFromTitle( $this, (int)$old ); + } + if ( !( $new instanceof Revision ) ) { + $new = Revision::newFromTitle( $this, (int)$new ); + } + // XXX: what if Revision objects are passed in, but they don't refer to this title? + // Add $old->getPage() != $new->getPage() || $old->getPage() != $this->getArticleID() + // in the sanity check below? + if ( !$old || !$new ) { + return null; // nothing to compare + } + $authors = []; + $old_cmp = '>'; + $new_cmp = '<'; + $options = (array)$options; + if ( in_array( 'include_old', $options ) ) { + $old_cmp = '>='; + } + if ( in_array( 'include_new', $options ) ) { + $new_cmp = '<='; + } + if ( in_array( 'include_both', $options ) ) { + $old_cmp = '>='; + $new_cmp = '<='; + } + // No DB query needed if $old and $new are the same or successive revisions: + if ( $old->getId() === $new->getId() ) { + return ( $old_cmp === '>' && $new_cmp === '<' ) ? + [] : + [ $old->getUserText( Revision::RAW ) ]; + } elseif ( $old->getId() === $new->getParentId() ) { + if ( $old_cmp === '>=' && $new_cmp === '<=' ) { + $authors[] = $old->getUserText( Revision::RAW ); + if ( $old->getUserText( Revision::RAW ) != $new->getUserText( Revision::RAW ) ) { + $authors[] = $new->getUserText( Revision::RAW ); + } + } elseif ( $old_cmp === '>=' ) { + $authors[] = $old->getUserText( Revision::RAW ); + } elseif ( $new_cmp === '<=' ) { + $authors[] = $new->getUserText( Revision::RAW ); + } + return $authors; + } + $dbr = wfGetDB( DB_REPLICA ); + $res = $dbr->select( 'revision', 'DISTINCT rev_user_text', + [ + 'rev_page' => $this->getArticleID(), + "rev_timestamp $old_cmp " . $dbr->addQuotes( $dbr->timestamp( $old->getTimestamp() ) ), + "rev_timestamp $new_cmp " . $dbr->addQuotes( $dbr->timestamp( $new->getTimestamp() ) ) + ], __METHOD__, + [ 'LIMIT' => $limit + 1 ] // add one so caller knows it was truncated ); + foreach ( $res as $row ) { + $authors[] = $row->rev_user_text; + } + return $authors; } /** - * Get the number of authors between the given revision IDs. + * Get the number of authors between the given revisions or revision IDs. * Used for diffs and other things that really need it. * - * @param $fromRevId \type{\int} Revision ID (first before range) - * @param $toRevId \type{\int} Revision ID (first after range) - * @param $limit \type{\int} Maximum number of authors - * @param $flags \type{\int} Title::GAID_FOR_UPDATE - * @return \type{\int} - */ - public function countAuthorsBetween( $fromRevId, $toRevId, $limit, $flags = 0 ) { - $db = ( $flags & self::GAID_FOR_UPDATE ) ? wfGetDB( DB_MASTER ) : wfGetDB( DB_SLAVE ); - $res = $db->select( 'revision', 'DISTINCT rev_user_text', - array( - 'rev_page = ' . $this->getArticleID(), - 'rev_id > ' . (int)$fromRevId, - 'rev_id < ' . (int)$toRevId - ), __METHOD__, - array( 'LIMIT' => $limit ) - ); - return (int)$db->numRows( $res ); + * @param int|Revision $old Old revision or rev ID (first before range by default) + * @param int|Revision $new New revision or rev ID (first after range by default) + * @param int $limit Maximum number of authors + * @param string|array $options (Optional): Single option, or an array of options: + * 'include_old' Include $old in the range; $new is excluded. + * 'include_new' Include $new in the range; $old is excluded. + * 'include_both' Include both $old and $new in the range. + * Unknown option values are ignored. + * @return int Number of revision authors in the range; zero if not both revisions exist + */ + public function countAuthorsBetween( $old, $new, $limit, $options = [] ) { + $authors = $this->getAuthorsBetween( $old, $new, $limit, $options ); + return $authors ? count( $authors ) : 0; } /** * Compare with another title. * - * @param $title \type{Title} - * @return \type{\bool} TRUE or FALSE + * @param Title $title + * @return bool */ public function equals( Title $title ) { // Note: === is necessary for proper matching of number-like titles. @@ -3792,25 +4424,15 @@ class Title { } /** - * Callback for usort() to do title sorts by (namespace, title) - * - * @return Integer: result of string comparison, or namespace comparison - */ - public static function compare( $a, $b ) { - if ( $a->getNamespace() == $b->getNamespace() ) { - return strcmp( $a->getText(), $b->getText() ); - } else { - return $a->getNamespace() - $b->getNamespace(); - } - } - - /** - * Return a string representation of this title + * Check if this title is a subpage of another title * - * @return \type{\string} String representation of this title + * @param Title $title + * @return bool */ - public function __toString() { - return $this->getPrefixedText(); + public function isSubpageOf( Title $title ) { + return $this->getInterwiki() === $title->getInterwiki() + && $this->getNamespace() == $title->getNamespace() + && strpos( $this->getDBkey(), $title->getDBkey() . '/' ) === 0; } /** @@ -3820,10 +4442,14 @@ class Title { * If you want to know if a title can be meaningfully viewed, you should * probably call the isKnown() method instead. * - * @return \type{\bool} + * @param int $flags An optional bit field; may be Title::GAID_FOR_UPDATE to check + * from master/for update + * @return bool */ - public function exists() { - return $this->getArticleId() != 0; + public function exists( $flags = 0 ) { + $exists = $this->getArticleID( $flags ) != 0; + Hooks::run( 'TitleExists', [ $this, &$exists ] ); + return $exists; } /** @@ -3840,26 +4466,45 @@ class Title { * existing code, but we might want to add an optional parameter to skip * it and any other expensive checks.) * - * @return \type{\bool} + * @return bool */ public function isAlwaysKnown() { - if ( $this->mInterwiki != '' ) { + $isKnown = null; + + /** + * Allows overriding default behavior for determining if a page exists. + * If $isKnown is kept as null, regular checks happen. If it's + * a boolean, this value is returned by the isKnown method. + * + * @since 1.20 + * + * @param Title $title + * @param bool|null $isKnown + */ + Hooks::run( 'TitleIsAlwaysKnown', [ $this, &$isKnown ] ); + + if ( !is_null( $isKnown ) ) { + return $isKnown; + } + + if ( $this->isExternal() ) { return true; // any interwiki link might be viewable, for all we know } - switch( $this->mNamespace ) { + + switch ( $this->mNamespace ) { case NS_MEDIA: case NS_FILE: - return (bool)wfFindFile( $this ); // file exists, possibly in a foreign repo + // file exists, possibly in a foreign repo + return (bool)wfFindFile( $this ); case NS_SPECIAL: - return SpecialPage::exists( $this->getDBkey() ); // valid special page + // valid special page + return SpecialPageFactory::exists( $this->getDBkey() ); case NS_MAIN: - return $this->mDbkeyform == ''; // selflink, possibly with fragment + // selflink, possibly with fragment + return $this->mDbkeyform == ''; case NS_MEDIAWIKI: - // If the page is form Mediawiki:message/lang, calling wfMsgWeirdKey causes - // the full l10n of that language to be loaded. That takes much memory and - // isn't needed. So we strip the language part away. - list( $basename, /* rest */ ) = explode( '/', $this->mDbkeyform, 2 ); - return (bool)wfMsgWeirdKey( $basename ); // known system message + // known system message + return $this->hasSourceText() !== false; default: return false; } @@ -3870,8 +4515,11 @@ class Title { * viewed? In particular, this function may be used to determine if * links to the title should be rendered as "bluelinks" (as opposed to * "redlinks" to non-existent pages). + * Adding something else to this function will cause inconsistency + * since LinkHolderArray calls isAlwaysKnown() and does its own + * page existence check. * - * @return \type{\bool} + * @return bool */ public function isKnown() { return $this->isAlwaysKnown() || $this->exists(); @@ -3880,7 +4528,7 @@ class Title { /** * Does this page have source text? * - * @return Boolean + * @return bool */ public function hasSourceText() { if ( $this->exists() ) { @@ -3889,50 +4537,106 @@ class Title { if ( $this->mNamespace == NS_MEDIAWIKI ) { // If the page doesn't exist but is a known system message, default - // message content will be displayed, same for language subpages - // Also, if the page is form Mediawiki:message/lang, calling wfMsgWeirdKey - // causes the full l10n of that language to be loaded. That takes much - // memory and isn't needed. So we strip the language part away. - list( $basename, /* rest */ ) = explode( '/', $this->mDbkeyform, 2 ); - return (bool)wfMsgWeirdKey( $basename ); + // message content will be displayed, same for language subpages- + // Use always content language to avoid loading hundreds of languages + // to get the link color. + global $wgContLang; + list( $name, ) = MessageCache::singleton()->figureMessage( + $wgContLang->lcfirst( $this->getText() ) + ); + $message = wfMessage( $name )->inLanguage( $wgContLang )->useDatabase( false ); + return $message->exists(); } return false; } /** - * Is this in a namespace that allows actual pages? + * Get the default message text or false if the message doesn't exist * - * @return \type{\bool} - * @internal note -- uses hardcoded namespace index instead of constants + * @return string|bool */ - public function canExist() { - return $this->mNamespace >= 0 && $this->mNamespace != NS_MEDIA; + public function getDefaultMessageText() { + global $wgContLang; + + if ( $this->getNamespace() != NS_MEDIAWIKI ) { // Just in case + return false; + } + + list( $name, $lang ) = MessageCache::singleton()->figureMessage( + $wgContLang->lcfirst( $this->getText() ) + ); + $message = wfMessage( $name )->inLanguage( $lang )->useDatabase( false ); + + if ( $message->exists() ) { + return $message->plain(); + } else { + return false; + } + } + + /** + * Updates page_touched for this page; called from LinksUpdate.php + * + * @param string $purgeTime [optional] TS_MW timestamp + * @return bool True if the update succeeded + */ + public function invalidateCache( $purgeTime = null ) { + if ( wfReadOnly() ) { + return false; + } elseif ( $this->mArticleID === 0 ) { + return true; // avoid gap locking if we know it's not there + } + + $dbw = wfGetDB( DB_MASTER ); + $dbw->onTransactionPreCommitOrIdle( function () { + ResourceLoaderWikiModule::invalidateModuleCache( $this, null, null, wfWikiID() ); + } ); + + $conds = $this->pageCond(); + DeferredUpdates::addUpdate( + new AutoCommitUpdate( + $dbw, + __METHOD__, + function ( IDatabase $dbw, $fname ) use ( $conds, $purgeTime ) { + $dbTimestamp = $dbw->timestamp( $purgeTime ?: time() ); + $dbw->update( + 'page', + [ 'page_touched' => $dbTimestamp ], + $conds + [ 'page_touched < ' . $dbw->addQuotes( $dbTimestamp ) ], + $fname + ); + MediaWikiServices::getInstance()->getLinkCache()->invalidateTitle( $this ); + } + ), + DeferredUpdates::PRESEND + ); + + return true; } /** - * Update page_touched timestamps and send squid purge messages for - * pages linking to this title. May be sent to the job queue depending + * Update page_touched timestamps and send CDN purge messages for + * pages linking to this title. May be sent to the job queue depending * on the number of links. Typically called on create and delete. */ public function touchLinks() { - $u = new HTMLCacheUpdate( $this, 'pagelinks' ); - $u->doUpdate(); - + DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this, 'pagelinks' ) ); if ( $this->getNamespace() == NS_CATEGORY ) { - $u = new HTMLCacheUpdate( $this, 'categorylinks' ); - $u->doUpdate(); + DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this, 'categorylinks' ) ); } } /** * Get the last touched timestamp * - * @param $db DatabaseBase: optional db - * @return \type{\string} Last touched timestamp + * @param IDatabase $db Optional db + * @return string|false Last-touched timestamp */ public function getTouched( $db = null ) { - $db = isset( $db ) ? $db : wfGetDB( DB_SLAVE ); + if ( $db === null ) { + $db = wfGetDB( DB_REPLICA ); + } $touched = $db->selectField( 'page', 'page_touched', $this->pageCond(), __METHOD__ ); return $touched; } @@ -3940,91 +4644,52 @@ class Title { /** * Get the timestamp when this page was updated since the user last saw it. * - * @param $user User - * @return Mixed: string/null + * @param User $user + * @return string|null */ public function getNotificationTimestamp( $user = null ) { - global $wgUser, $wgShowUpdatedMarker; + global $wgUser; + // Assume current user if none given if ( !$user ) { $user = $wgUser; } // Check cache first $uid = $user->getId(); + if ( !$uid ) { + return false; + } // avoid isset here, as it'll return false for null entries if ( array_key_exists( $uid, $this->mNotificationTimestamp ) ) { return $this->mNotificationTimestamp[$uid]; } - if ( !$uid || !$wgShowUpdatedMarker ) { - return $this->mNotificationTimestamp[$uid] = false; - } // Don't cache too much! if ( count( $this->mNotificationTimestamp ) >= self::CACHE_MAX ) { - $this->mNotificationTimestamp = array(); - } - $dbr = wfGetDB( DB_SLAVE ); - $this->mNotificationTimestamp[$uid] = $dbr->selectField( 'watchlist', - 'wl_notificationtimestamp', - array( 'wl_namespace' => $this->getNamespace(), - 'wl_title' => $this->getDBkey(), - 'wl_user' => $user->getId() - ), - __METHOD__ - ); - return $this->mNotificationTimestamp[$uid]; - } - - /** - * Get the trackback URL for this page - * - * @return \type{\string} Trackback URL - */ - public function trackbackURL() { - global $wgScriptPath, $wgServer, $wgScriptExtension; - - return "$wgServer$wgScriptPath/trackback$wgScriptExtension?article=" - . htmlspecialchars( urlencode( $this->getPrefixedDBkey() ) ); - } + $this->mNotificationTimestamp = []; + } - /** - * Get the trackback RDF for this page - * - * @return \type{\string} Trackback RDF - */ - public function trackbackRDF() { - $url = htmlspecialchars( $this->getFullURL() ); - $title = htmlspecialchars( $this->getText() ); - $tburl = $this->trackbackURL(); + $store = MediaWikiServices::getInstance()->getWatchedItemStore(); + $watchedItem = $store->getWatchedItem( $user, $this ); + if ( $watchedItem ) { + $this->mNotificationTimestamp[$uid] = $watchedItem->getNotificationTimestamp(); + } else { + $this->mNotificationTimestamp[$uid] = false; + } - // Autodiscovery RDF is placed in comments so HTML validator - // won't barf. This is a rather icky workaround, but seems - // frequently used by this kind of RDF thingy. - // - // Spec: http://www.sixapart.com/pronet/docs/trackback_spec - return ""; + return $this->mNotificationTimestamp[$uid]; } /** * Generate strings used for xml 'id' names in monobook tabs * - * @param $prepend string defaults to 'nstab-' - * @return \type{\string} XML 'id' name + * @param string $prepend Defaults to 'nstab-' + * @return string XML 'id' name */ public function getNamespaceKey( $prepend = 'nstab-' ) { global $wgContLang; // Gets the subject namespace if this title $namespace = MWNamespace::getSubject( $this->getNamespace() ); - // Checks if cononical namespace name exists for namespace + // Checks if canonical namespace name exists for namespace if ( MWNamespace::exists( $this->getNamespace() ) ) { // Uses canonical namespace name $namespaceKey = MWNamespace::getCanonicalName( $namespace ); @@ -4045,84 +4710,33 @@ class Title { return $prepend . $namespaceKey; } - /** - * Returns true if this is a special page. - * - * @return boolean - */ - public function isSpecialPage() { - return $this->getNamespace() == NS_SPECIAL; - } - - /** - * Returns true if this title resolves to the named special page - * - * @param $name \type{\string} The special page name - * @return boolean - */ - public function isSpecial( $name ) { - if ( $this->getNamespace() == NS_SPECIAL ) { - list( $thisName, /* $subpage */ ) = SpecialPage::resolveAliasWithSubpage( $this->getDBkey() ); - if ( $name == $thisName ) { - return true; - } - } - return false; - } - - /** - * If the Title refers to a special page alias which is not the local default, - * - * @return \type{Title} A new Title which points to the local default. - * Otherwise, returns $this. - */ - public function fixSpecialName() { - if ( $this->getNamespace() == NS_SPECIAL ) { - $canonicalName = SpecialPage::resolveAlias( $this->mDbkeyform ); - if ( $canonicalName ) { - $localName = SpecialPage::getLocalNameFor( $canonicalName ); - if ( $localName != $this->mDbkeyform ) { - return Title::makeTitle( NS_SPECIAL, $localName ); - } - } - } - return $this; - } - - /** - * Is this Title in a namespace which contains content? - * In other words, is this a content page, for the purposes of calculating - * statistics, etc? - * - * @return Boolean - */ - public function isContentPage() { - return MWNamespace::isContent( $this->getNamespace() ); - } - /** * Get all extant redirects to this Title * - * @param $ns \twotypes{\int,\null} Single namespace to consider; - * NULL to consider all namespaces - * @return \type{\arrayof{Title}} Redirects to this title + * @param int|null $ns Single namespace to consider; null to consider all namespaces + * @return Title[] Array of Title redirects to this title */ public function getRedirectsHere( $ns = null ) { - $redirs = array(); + $redirs = []; - $dbr = wfGetDB( DB_SLAVE ); - $where = array( + $dbr = wfGetDB( DB_REPLICA ); + $where = [ 'rd_namespace' => $this->getNamespace(), 'rd_title' => $this->getDBkey(), 'rd_from = page_id' - ); + ]; + if ( $this->isExternal() ) { + $where['rd_interwiki'] = $this->getInterwiki(); + } else { + $where[] = 'rd_interwiki = ' . $dbr->addQuotes( '' ) . ' OR rd_interwiki IS NULL'; + } if ( !is_null( $ns ) ) { $where['page_namespace'] = $ns; } $res = $dbr->select( - array( 'redirect', 'page' ), - array( 'page_namespace', 'page_title' ), + [ 'redirect', 'page' ], + [ 'page_namespace', 'page_title' ], $where, __METHOD__ ); @@ -4136,20 +4750,22 @@ class Title { /** * Check if this Title is a valid redirect target * - * @return \type{\bool} + * @return bool */ public function isValidRedirectTarget() { global $wgInvalidRedirectTargets; - // invalid redirect targets are stored in a global array, but explicity disallow Userlogout here - if ( $this->isSpecial( 'Userlogout' ) ) { - return false; - } - - foreach ( $wgInvalidRedirectTargets as $target ) { - if ( $this->isSpecial( $target ) ) { + if ( $this->isSpecialPage() ) { + // invalid redirect targets are stored in a global array, but explicitly disallow Userlogout here + if ( $this->isSpecial( 'Userlogout' ) ) { return false; } + + foreach ( $wgInvalidRedirectTargets as $target ) { + if ( $this->isSpecial( $target ) ) { + return false; + } + } } return true; @@ -4158,70 +4774,25 @@ class Title { /** * Get a backlink cache object * - * @return object BacklinkCache + * @return BacklinkCache */ - function getBacklinkCache() { - if ( is_null( $this->mBacklinkCache ) ) { - $this->mBacklinkCache = new BacklinkCache( $this ); - } - return $this->mBacklinkCache; + public function getBacklinkCache() { + return BacklinkCache::get( $this ); } /** - * Whether the magic words __INDEX__ and __NOINDEX__ function for - * this page. + * Whether the magic words __INDEX__ and __NOINDEX__ function for this page. * - * @return Boolean + * @return bool */ public function canUseNoindex() { - global $wgContentNamespaces, $wgExemptFromUserRobotsControl; + global $wgExemptFromUserRobotsControl; $bannedNamespaces = is_null( $wgExemptFromUserRobotsControl ) - ? $wgContentNamespaces + ? MWNamespace::getContentNamespaces() : $wgExemptFromUserRobotsControl; return !in_array( $this->mNamespace, $bannedNamespaces ); - - } - - /** - * Returns restriction types for the current Title - * - * @return array applicable restriction types - */ - public function getRestrictionTypes() { - $types = self::getFilteredRestrictionTypes( $this->exists() ); - - if ( $this->getNamespace() != NS_FILE ) { - # Remove the upload restriction for non-file titles - $types = array_diff( $types, array( 'upload' ) ); - } - - wfRunHooks( 'TitleGetRestrictionTypes', array( $this, &$types ) ); - - wfDebug( __METHOD__ . ': applicable restriction types for ' . - $this->getPrefixedText() . ' are ' . implode( ',', $types ) ); - - return $types; - } - /** - * Get a filtered list of all restriction types supported by this wiki. - * @param bool $exists True to get all restriction types that apply to - * titles that do exist, False for all restriction types that apply to - * titles that do not exist - * @return array - */ - public static function getFilteredRestrictionTypes( $exists = true ) { - global $wgRestrictionTypes; - $types = $wgRestrictionTypes; - if ( $exists ) { - # Remove the create restriction for existing titles - $types = array_diff( $types, array( 'create' ) ); - } else { - # Only the create and upload restrictions apply to non-existing titles - $types = array_intersect( $types, array( 'create', 'upload' ) ); - } - return $types; } /** @@ -4229,13 +4800,19 @@ class Title { * prefix. This will be fed to Collation::getSortKey() to get a * binary sortkey that can be used for actual sorting. * - * @param $prefix string The prefix to be used, specified using + * @param string $prefix The prefix to be used, specified using * {{defaultsort:}} or like [[Category:Foo|prefix]]. Empty for no * prefix. * @return string */ public function getCategorySortkey( $prefix = '' ) { $unprefixed = $this->getText(); + + // Anything that uses this hook should only depend + // on the Title object passed in, and should probably + // tell the users to run updateCollations.php --force + // in order to re-sort existing category relations. + Hooks::run( 'GetDefaultSortkey', [ $this, &$unprefixed ] ); if ( $prefix !== '' ) { # Separate with a line feed, so the unprefixed part is only used as # a tiebreaker when two pages have the exact same prefix. @@ -4246,4 +4823,205 @@ class Title { } return $unprefixed; } + + /** + * Returns the page language code saved in the database, if $wgPageLanguageUseDB is set + * to true in LocalSettings.php, otherwise returns false. If there is no language saved in + * the db, it will return NULL. + * + * @return string|null|bool + */ + private function getDbPageLanguageCode() { + global $wgPageLanguageUseDB; + + // check, if the page language could be saved in the database, and if so and + // the value is not requested already, lookup the page language using LinkCache + if ( $wgPageLanguageUseDB && $this->mDbPageLanguage === false ) { + $linkCache = LinkCache::singleton(); + $linkCache->addLinkObj( $this ); + $this->mDbPageLanguage = $linkCache->getGoodLinkFieldObj( $this, 'lang' ); + } + + return $this->mDbPageLanguage; + } + + /** + * Get the language in which the content of this page is written in + * wikitext. Defaults to $wgContLang, but in certain cases it can be + * e.g. $wgLang (such as special pages, which are in the user language). + * + * @since 1.18 + * @return Language + */ + public function getPageLanguage() { + global $wgLang, $wgLanguageCode; + if ( $this->isSpecialPage() ) { + // special pages are in the user language + return $wgLang; + } + + // Checking if DB language is set + $dbPageLanguage = $this->getDbPageLanguageCode(); + if ( $dbPageLanguage ) { + return wfGetLangObj( $dbPageLanguage ); + } + + if ( !$this->mPageLanguage || $this->mPageLanguage[1] !== $wgLanguageCode ) { + // Note that this may depend on user settings, so the cache should + // be only per-request. + // NOTE: ContentHandler::getPageLanguage() may need to load the + // content to determine the page language! + // Checking $wgLanguageCode hasn't changed for the benefit of unit + // tests. + $contentHandler = ContentHandler::getForTitle( $this ); + $langObj = $contentHandler->getPageLanguage( $this ); + $this->mPageLanguage = [ $langObj->getCode(), $wgLanguageCode ]; + } else { + $langObj = wfGetLangObj( $this->mPageLanguage[0] ); + } + + return $langObj; + } + + /** + * Get the language in which the content of this page is written when + * viewed by user. Defaults to $wgContLang, but in certain cases it can be + * e.g. $wgLang (such as special pages, which are in the user language). + * + * @since 1.20 + * @return Language + */ + public function getPageViewLanguage() { + global $wgLang; + + if ( $this->isSpecialPage() ) { + // If the user chooses a variant, the content is actually + // in a language whose code is the variant code. + $variant = $wgLang->getPreferredVariant(); + if ( $wgLang->getCode() !== $variant ) { + return Language::factory( $variant ); + } + + return $wgLang; + } + + // Checking if DB language is set + $dbPageLanguage = $this->getDbPageLanguageCode(); + if ( $dbPageLanguage ) { + $pageLang = wfGetLangObj( $dbPageLanguage ); + $variant = $pageLang->getPreferredVariant(); + if ( $pageLang->getCode() !== $variant ) { + $pageLang = Language::factory( $variant ); + } + + return $pageLang; + } + + // @note Can't be cached persistently, depends on user settings. + // @note ContentHandler::getPageViewLanguage() may need to load the + // content to determine the page language! + $contentHandler = ContentHandler::getForTitle( $this ); + $pageLang = $contentHandler->getPageViewLanguage( $this ); + return $pageLang; + } + + /** + * Get a list of rendered edit notices for this page. + * + * Array is keyed by the original message key, and values are rendered using parseAsBlock, so + * they will already be wrapped in paragraphs. + * + * @since 1.21 + * @param int $oldid Revision ID that's being edited + * @return array + */ + public function getEditNotices( $oldid = 0 ) { + $notices = []; + + // Optional notice for the entire namespace + $editnotice_ns = 'editnotice-' . $this->getNamespace(); + $msg = wfMessage( $editnotice_ns ); + if ( $msg->exists() ) { + $html = $msg->parseAsBlock(); + // Edit notices may have complex logic, but output nothing (T91715) + if ( trim( $html ) !== '' ) { + $notices[$editnotice_ns] = Html::rawElement( + 'div', + [ 'class' => [ + 'mw-editnotice', + 'mw-editnotice-namespace', + Sanitizer::escapeClass( "mw-$editnotice_ns" ) + ] ], + $html + ); + } + } + + if ( MWNamespace::hasSubpages( $this->getNamespace() ) ) { + // Optional notice for page itself and any parent page + $parts = explode( '/', $this->getDBkey() ); + $editnotice_base = $editnotice_ns; + while ( count( $parts ) > 0 ) { + $editnotice_base .= '-' . array_shift( $parts ); + $msg = wfMessage( $editnotice_base ); + if ( $msg->exists() ) { + $html = $msg->parseAsBlock(); + if ( trim( $html ) !== '' ) { + $notices[$editnotice_base] = Html::rawElement( + 'div', + [ 'class' => [ + 'mw-editnotice', + 'mw-editnotice-base', + Sanitizer::escapeClass( "mw-$editnotice_base" ) + ] ], + $html + ); + } + } + } + } else { + // Even if there are no subpages in namespace, we still don't want "/" in MediaWiki message keys + $editnoticeText = $editnotice_ns . '-' . strtr( $this->getDBkey(), '/', '-' ); + $msg = wfMessage( $editnoticeText ); + if ( $msg->exists() ) { + $html = $msg->parseAsBlock(); + if ( trim( $html ) !== '' ) { + $notices[$editnoticeText] = Html::rawElement( + 'div', + [ 'class' => [ + 'mw-editnotice', + 'mw-editnotice-page', + Sanitizer::escapeClass( "mw-$editnoticeText" ) + ] ], + $html + ); + } + } + } + + Hooks::run( 'TitleGetEditNotices', [ $this, $oldid, &$notices ] ); + return $notices; + } + + /** + * @return array + */ + public function __sleep() { + return [ + 'mNamespace', + 'mDbkeyform', + 'mFragment', + 'mInterwiki', + 'mLocalInterwiki', + 'mUserCaseDBKey', + 'mDefaultNamespace', + ]; + } + + public function __wakeup() { + $this->mArticleID = ( $this->mNamespace >= 0 ) ? -1 : 0; + $this->mUrlform = wfUrlencode( $this->mDbkeyform ); + $this->mTextform = strtr( $this->mDbkeyform, '_', ' ' ); + } + }