--- /dev/null
+<?php
+/**
+ * Cache of the contents of localisation files.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+use CLDRPluralRuleParser\Evaluator;
+use CLDRPluralRuleParser\Error as CLDRPluralRuleError;
+use MediaWiki\MediaWikiServices;
+
+/**
+ * Class for caching the contents of localisation files, Messages*.php
+ * and *.i18n.php.
+ *
+ * An instance of this class is available using Language::getLocalisationCache().
+ *
+ * The values retrieved from here are merged, containing items from extension
+ * files, core messages files and the language fallback sequence (e.g. zh-cn ->
+ * zh-hans -> en ). Some common errors are corrected, for example namespace
+ * names with spaces instead of underscores, but heavyweight processing, such
+ * as grammatical transformation, is done by the caller.
+ */
+class LocalisationCache {
+ const VERSION = 4;
+
+ /** Configuration associative array */
+ private $conf;
+
+ /**
+ * True if recaching should only be done on an explicit call to recache().
+ * Setting this reduces the overhead of cache freshness checking, which
+ * requires doing a stat() for every extension i18n file.
+ */
+ private $manualRecache = false;
+
+ /**
+ * True to treat all files as expired until they are regenerated by this object.
+ */
+ private $forceRecache = false;
+
+ /**
+ * The cache data. 3-d array, where the first key is the language code,
+ * the second key is the item key e.g. 'messages', and the third key is
+ * an item specific subkey index. Some items are not arrays and so for those
+ * items, there are no subkeys.
+ */
+ protected $data = [];
+
+ /**
+ * The persistent store object. An instance of LCStore.
+ *
+ * @var LCStore
+ */
+ private $store;
+
+ /**
+ * A 2-d associative array, code/key, where presence indicates that the item
+ * is loaded. Value arbitrary.
+ *
+ * For split items, if set, this indicates that all of the subitems have been
+ * loaded.
+ */
+ private $loadedItems = [];
+
+ /**
+ * A 3-d associative array, code/key/subkey, where presence indicates that
+ * the subitem is loaded. Only used for the split items, i.e. messages.
+ */
+ private $loadedSubitems = [];
+
+ /**
+ * An array where presence of a key indicates that that language has been
+ * initialised. Initialisation includes checking for cache expiry and doing
+ * any necessary updates.
+ */
+ private $initialisedLangs = [];
+
+ /**
+ * An array mapping non-existent pseudo-languages to fallback languages. This
+ * is filled by initShallowFallback() when data is requested from a language
+ * that lacks a Messages*.php file.
+ */
+ private $shallowFallbacks = [];
+
+ /**
+ * An array where the keys are codes that have been recached by this instance.
+ */
+ private $recachedLangs = [];
+
+ /**
+ * All item keys
+ */
+ static public $allKeys = [
+ 'fallback', 'namespaceNames', 'bookstoreList',
+ 'magicWords', 'messages', 'rtl', 'capitalizeAllNouns', 'digitTransformTable',
+ 'separatorTransformTable', 'fallback8bitEncoding', 'linkPrefixExtension',
+ 'linkTrail', 'linkPrefixCharset', 'namespaceAliases',
+ 'dateFormats', 'datePreferences', 'datePreferenceMigrationMap',
+ 'defaultDateFormat', 'extraUserToggles', 'specialPageAliases',
+ 'imageFiles', 'preloadedMessages', 'namespaceGenderAliases',
+ 'digitGroupingPattern', 'pluralRules', 'pluralRuleTypes', 'compiledPluralRules',
+ ];
+
+ /**
+ * Keys for items which consist of associative arrays, which may be merged
+ * by a fallback sequence.
+ */
+ static public $mergeableMapKeys = [ 'messages', 'namespaceNames',
+ 'namespaceAliases', 'dateFormats', 'imageFiles', 'preloadedMessages'
+ ];
+
+ /**
+ * Keys for items which are a numbered array.
+ */
+ static public $mergeableListKeys = [ 'extraUserToggles' ];
+
+ /**
+ * Keys for items which contain an array of arrays of equivalent aliases
+ * for each subitem. The aliases may be merged by a fallback sequence.
+ */
+ static public $mergeableAliasListKeys = [ 'specialPageAliases' ];
+
+ /**
+ * Keys for items which contain an associative array, and may be merged if
+ * the primary value contains the special array key "inherit". That array
+ * key is removed after the first merge.
+ */
+ static public $optionalMergeKeys = [ 'bookstoreList' ];
+
+ /**
+ * Keys for items that are formatted like $magicWords
+ */
+ static public $magicWordKeys = [ 'magicWords' ];
+
+ /**
+ * Keys for items where the subitems are stored in the backend separately.
+ */
+ static public $splitKeys = [ 'messages' ];
+
+ /**
+ * Keys which are loaded automatically by initLanguage()
+ */
+ static public $preloadedKeys = [ 'dateFormats', 'namespaceNames' ];
+
+ /**
+ * Associative array of cached plural rules. The key is the language code,
+ * the value is an array of plural rules for that language.
+ */
+ private $pluralRules = null;
+
+ /**
+ * Associative array of cached plural rule types. The key is the language
+ * code, the value is an array of plural rule types for that language. For
+ * example, $pluralRuleTypes['ar'] = ['zero', 'one', 'two', 'few', 'many'].
+ * The index for each rule type matches the index for the rule in
+ * $pluralRules, thus allowing correlation between the two. The reason we
+ * don't just use the type names as the keys in $pluralRules is because
+ * Language::convertPlural applies the rules based on numeric order (or
+ * explicit numeric parameter), not based on the name of the rule type. For
+ * example, {{plural:count|wordform1|wordform2|wordform3}}, rather than
+ * {{plural:count|one=wordform1|two=wordform2|many=wordform3}}.
+ */
+ private $pluralRuleTypes = null;
+
+ private $mergeableKeys = null;
+
+ /**
+ * For constructor parameters, see the documentation in DefaultSettings.php
+ * for $wgLocalisationCacheConf.
+ *
+ * @param array $conf
+ * @throws MWException
+ */
+ function __construct( $conf ) {
+ global $wgCacheDirectory;
+
+ $this->conf = $conf;
+ $storeConf = [];
+ if ( !empty( $conf['storeClass'] ) ) {
+ $storeClass = $conf['storeClass'];
+ } else {
+ switch ( $conf['store'] ) {
+ case 'files':
+ case 'file':
+ $storeClass = 'LCStoreCDB';
+ break;
+ case 'db':
+ $storeClass = 'LCStoreDB';
+ break;
+ case 'array':
+ $storeClass = 'LCStoreStaticArray';
+ break;
+ case 'detect':
+ if ( !empty( $conf['storeDirectory'] ) ) {
+ $storeClass = 'LCStoreCDB';
+ } elseif ( $wgCacheDirectory ) {
+ $storeConf['directory'] = $wgCacheDirectory;
+ $storeClass = 'LCStoreCDB';
+ } else {
+ $storeClass = 'LCStoreDB';
+ }
+ break;
+ default:
+ throw new MWException(
+ 'Please set $wgLocalisationCacheConf[\'store\'] to something sensible.'
+ );
+ }
+ }
+
+ wfDebugLog( 'caches', static::class . ": using store $storeClass" );
+ if ( !empty( $conf['storeDirectory'] ) ) {
+ $storeConf['directory'] = $conf['storeDirectory'];
+ }
+
+ $this->store = new $storeClass( $storeConf );
+ foreach ( [ 'manualRecache', 'forceRecache' ] as $var ) {
+ if ( isset( $conf[$var] ) ) {
+ $this->$var = $conf[$var];
+ }
+ }
+ }
+
+ /**
+ * Returns true if the given key is mergeable, that is, if it is an associative
+ * array which can be merged through a fallback sequence.
+ * @param string $key
+ * @return bool
+ */
+ public function isMergeableKey( $key ) {
+ if ( $this->mergeableKeys === null ) {
+ $this->mergeableKeys = array_flip( array_merge(
+ self::$mergeableMapKeys,
+ self::$mergeableListKeys,
+ self::$mergeableAliasListKeys,
+ self::$optionalMergeKeys,
+ self::$magicWordKeys
+ ) );
+ }
+
+ return isset( $this->mergeableKeys[$key] );
+ }
+
+ /**
+ * Get a cache item.
+ *
+ * Warning: this may be slow for split items (messages), since it will
+ * need to fetch all of the subitems from the cache individually.
+ * @param string $code
+ * @param string $key
+ * @return mixed
+ */
+ public function getItem( $code, $key ) {
+ if ( !isset( $this->loadedItems[$code][$key] ) ) {
+ $this->loadItem( $code, $key );
+ }
+
+ if ( $key === 'fallback' && isset( $this->shallowFallbacks[$code] ) ) {
+ return $this->shallowFallbacks[$code];
+ }
+
+ return $this->data[$code][$key];
+ }
+
+ /**
+ * Get a subitem, for instance a single message for a given language.
+ * @param string $code
+ * @param string $key
+ * @param string $subkey
+ * @return mixed|null
+ */
+ public function getSubitem( $code, $key, $subkey ) {
+ if ( !isset( $this->loadedSubitems[$code][$key][$subkey] ) &&
+ !isset( $this->loadedItems[$code][$key] )
+ ) {
+ $this->loadSubitem( $code, $key, $subkey );
+ }
+
+ if ( isset( $this->data[$code][$key][$subkey] ) ) {
+ return $this->data[$code][$key][$subkey];
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * Get the list of subitem keys for a given item.
+ *
+ * This is faster than array_keys($lc->getItem(...)) for the items listed in
+ * self::$splitKeys.
+ *
+ * Will return null if the item is not found, or false if the item is not an
+ * array.
+ * @param string $code
+ * @param string $key
+ * @return bool|null|string|string[]
+ */
+ public function getSubitemList( $code, $key ) {
+ if ( in_array( $key, self::$splitKeys ) ) {
+ return $this->getSubitem( $code, 'list', $key );
+ } else {
+ $item = $this->getItem( $code, $key );
+ if ( is_array( $item ) ) {
+ return array_keys( $item );
+ } else {
+ return false;
+ }
+ }
+ }
+
+ /**
+ * Load an item into the cache.
+ * @param string $code
+ * @param string $key
+ */
+ protected function loadItem( $code, $key ) {
+ if ( !isset( $this->initialisedLangs[$code] ) ) {
+ $this->initLanguage( $code );
+ }
+
+ // Check to see if initLanguage() loaded it for us
+ if ( isset( $this->loadedItems[$code][$key] ) ) {
+ return;
+ }
+
+ if ( isset( $this->shallowFallbacks[$code] ) ) {
+ $this->loadItem( $this->shallowFallbacks[$code], $key );
+
+ return;
+ }
+
+ if ( in_array( $key, self::$splitKeys ) ) {
+ $subkeyList = $this->getSubitem( $code, 'list', $key );
+ foreach ( $subkeyList as $subkey ) {
+ if ( isset( $this->data[$code][$key][$subkey] ) ) {
+ continue;
+ }
+ $this->data[$code][$key][$subkey] = $this->getSubitem( $code, $key, $subkey );
+ }
+ } else {
+ $this->data[$code][$key] = $this->store->get( $code, $key );
+ }
+
+ $this->loadedItems[$code][$key] = true;
+ }
+
+ /**
+ * Load a subitem into the cache
+ * @param string $code
+ * @param string $key
+ * @param string $subkey
+ */
+ protected function loadSubitem( $code, $key, $subkey ) {
+ if ( !in_array( $key, self::$splitKeys ) ) {
+ $this->loadItem( $code, $key );
+
+ return;
+ }
+
+ if ( !isset( $this->initialisedLangs[$code] ) ) {
+ $this->initLanguage( $code );
+ }
+
+ // Check to see if initLanguage() loaded it for us
+ if ( isset( $this->loadedItems[$code][$key] ) ||
+ isset( $this->loadedSubitems[$code][$key][$subkey] )
+ ) {
+ return;
+ }
+
+ if ( isset( $this->shallowFallbacks[$code] ) ) {
+ $this->loadSubitem( $this->shallowFallbacks[$code], $key, $subkey );
+
+ return;
+ }
+
+ $value = $this->store->get( $code, "$key:$subkey" );
+ $this->data[$code][$key][$subkey] = $value;
+ $this->loadedSubitems[$code][$key][$subkey] = true;
+ }
+
+ /**
+ * Returns true if the cache identified by $code is missing or expired.
+ *
+ * @param string $code
+ *
+ * @return bool
+ */
+ public function isExpired( $code ) {
+ if ( $this->forceRecache && !isset( $this->recachedLangs[$code] ) ) {
+ wfDebug( __METHOD__ . "($code): forced reload\n" );
+
+ return true;
+ }
+
+ $deps = $this->store->get( $code, 'deps' );
+ $keys = $this->store->get( $code, 'list' );
+ $preload = $this->store->get( $code, 'preload' );
+ // Different keys may expire separately for some stores
+ if ( $deps === null || $keys === null || $preload === null ) {
+ wfDebug( __METHOD__ . "($code): cache missing, need to make one\n" );
+
+ return true;
+ }
+
+ foreach ( $deps as $dep ) {
+ // Because we're unserializing stuff from cache, we
+ // could receive objects of classes that don't exist
+ // anymore (e.g. uninstalled extensions)
+ // When this happens, always expire the cache
+ if ( !$dep instanceof CacheDependency || $dep->isExpired() ) {
+ wfDebug( __METHOD__ . "($code): cache for $code expired due to " .
+ get_class( $dep ) . "\n" );
+
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Initialise a language in this object. Rebuild the cache if necessary.
+ * @param string $code
+ * @throws MWException
+ */
+ protected function initLanguage( $code ) {
+ if ( isset( $this->initialisedLangs[$code] ) ) {
+ return;
+ }
+
+ $this->initialisedLangs[$code] = true;
+
+ # If the code is of the wrong form for a Messages*.php file, do a shallow fallback
+ if ( !Language::isValidBuiltInCode( $code ) ) {
+ $this->initShallowFallback( $code, 'en' );
+
+ return;
+ }
+
+ # Recache the data if necessary
+ if ( !$this->manualRecache && $this->isExpired( $code ) ) {
+ if ( Language::isSupportedLanguage( $code ) ) {
+ $this->recache( $code );
+ } elseif ( $code === 'en' ) {
+ throw new MWException( 'MessagesEn.php is missing.' );
+ } else {
+ $this->initShallowFallback( $code, 'en' );
+ }
+
+ return;
+ }
+
+ # Preload some stuff
+ $preload = $this->getItem( $code, 'preload' );
+ if ( $preload === null ) {
+ if ( $this->manualRecache ) {
+ // No Messages*.php file. Do shallow fallback to en.
+ if ( $code === 'en' ) {
+ throw new MWException( 'No localisation cache found for English. ' .
+ 'Please run maintenance/rebuildLocalisationCache.php.' );
+ }
+ $this->initShallowFallback( $code, 'en' );
+
+ return;
+ } else {
+ throw new MWException( 'Invalid or missing localisation cache.' );
+ }
+ }
+ $this->data[$code] = $preload;
+ foreach ( $preload as $key => $item ) {
+ if ( in_array( $key, self::$splitKeys ) ) {
+ foreach ( $item as $subkey => $subitem ) {
+ $this->loadedSubitems[$code][$key][$subkey] = true;
+ }
+ } else {
+ $this->loadedItems[$code][$key] = true;
+ }
+ }
+ }
+
+ /**
+ * Create a fallback from one language to another, without creating a
+ * complete persistent cache.
+ * @param string $primaryCode
+ * @param string $fallbackCode
+ */
+ public function initShallowFallback( $primaryCode, $fallbackCode ) {
+ $this->data[$primaryCode] =& $this->data[$fallbackCode];
+ $this->loadedItems[$primaryCode] =& $this->loadedItems[$fallbackCode];
+ $this->loadedSubitems[$primaryCode] =& $this->loadedSubitems[$fallbackCode];
+ $this->shallowFallbacks[$primaryCode] = $fallbackCode;
+ }
+
+ /**
+ * Read a PHP file containing localisation data.
+ * @param string $_fileName
+ * @param string $_fileType
+ * @throws MWException
+ * @return array
+ */
+ protected function readPHPFile( $_fileName, $_fileType ) {
+ // Disable APC caching
+ MediaWiki\suppressWarnings();
+ $_apcEnabled = ini_set( 'apc.cache_by_default', '0' );
+ MediaWiki\restoreWarnings();
+
+ include $_fileName;
+
+ MediaWiki\suppressWarnings();
+ ini_set( 'apc.cache_by_default', $_apcEnabled );
+ MediaWiki\restoreWarnings();
+
+ if ( $_fileType == 'core' || $_fileType == 'extension' ) {
+ $data = compact( self::$allKeys );
+ } elseif ( $_fileType == 'aliases' ) {
+ $data = compact( 'aliases' );
+ } else {
+ throw new MWException( __METHOD__ . ": Invalid file type: $_fileType" );
+ }
+
+ return $data;
+ }
+
+ /**
+ * Read a JSON file containing localisation messages.
+ * @param string $fileName Name of file to read
+ * @throws MWException If there is a syntax error in the JSON file
+ * @return array Array with a 'messages' key, or empty array if the file doesn't exist
+ */
+ public function readJSONFile( $fileName ) {
+ if ( !is_readable( $fileName ) ) {
+ return [];
+ }
+
+ $json = file_get_contents( $fileName );
+ if ( $json === false ) {
+ return [];
+ }
+
+ $data = FormatJson::decode( $json, true );
+ if ( $data === null ) {
+ throw new MWException( __METHOD__ . ": Invalid JSON file: $fileName" );
+ }
+
+ // Remove keys starting with '@', they're reserved for metadata and non-message data
+ foreach ( $data as $key => $unused ) {
+ if ( $key === '' || $key[0] === '@' ) {
+ unset( $data[$key] );
+ }
+ }
+
+ // The JSON format only supports messages, none of the other variables, so wrap the data
+ return [ 'messages' => $data ];
+ }
+
+ /**
+ * Get the compiled plural rules for a given language from the XML files.
+ * @since 1.20
+ * @param string $code
+ * @return array|null
+ */
+ public function getCompiledPluralRules( $code ) {
+ $rules = $this->getPluralRules( $code );
+ if ( $rules === null ) {
+ return null;
+ }
+ try {
+ $compiledRules = Evaluator::compile( $rules );
+ } catch ( CLDRPluralRuleError $e ) {
+ wfDebugLog( 'l10n', $e->getMessage() );
+
+ return [];
+ }
+
+ return $compiledRules;
+ }
+
+ /**
+ * Get the plural rules for a given language from the XML files.
+ * Cached.
+ * @since 1.20
+ * @param string $code
+ * @return array|null
+ */
+ public function getPluralRules( $code ) {
+ if ( $this->pluralRules === null ) {
+ $this->loadPluralFiles();
+ }
+ if ( !isset( $this->pluralRules[$code] ) ) {
+ return null;
+ } else {
+ return $this->pluralRules[$code];
+ }
+ }
+
+ /**
+ * Get the plural rule types for a given language from the XML files.
+ * Cached.
+ * @since 1.22
+ * @param string $code
+ * @return array|null
+ */
+ public function getPluralRuleTypes( $code ) {
+ if ( $this->pluralRuleTypes === null ) {
+ $this->loadPluralFiles();
+ }
+ if ( !isset( $this->pluralRuleTypes[$code] ) ) {
+ return null;
+ } else {
+ return $this->pluralRuleTypes[$code];
+ }
+ }
+
+ /**
+ * Load the plural XML files.
+ */
+ protected function loadPluralFiles() {
+ global $IP;
+ $cldrPlural = "$IP/languages/data/plurals.xml";
+ $mwPlural = "$IP/languages/data/plurals-mediawiki.xml";
+ // Load CLDR plural rules
+ $this->loadPluralFile( $cldrPlural );
+ if ( file_exists( $mwPlural ) ) {
+ // Override or extend
+ $this->loadPluralFile( $mwPlural );
+ }
+ }
+
+ /**
+ * Load a plural XML file with the given filename, compile the relevant
+ * rules, and save the compiled rules in a process-local cache.
+ *
+ * @param string $fileName
+ * @throws MWException
+ */
+ protected function loadPluralFile( $fileName ) {
+ // Use file_get_contents instead of DOMDocument::load (T58439)
+ $xml = file_get_contents( $fileName );
+ if ( !$xml ) {
+ throw new MWException( "Unable to read plurals file $fileName" );
+ }
+ $doc = new DOMDocument;
+ $doc->loadXML( $xml );
+ $rulesets = $doc->getElementsByTagName( "pluralRules" );
+ foreach ( $rulesets as $ruleset ) {
+ $codes = $ruleset->getAttribute( 'locales' );
+ $rules = [];
+ $ruleTypes = [];
+ $ruleElements = $ruleset->getElementsByTagName( "pluralRule" );
+ foreach ( $ruleElements as $elt ) {
+ $ruleType = $elt->getAttribute( 'count' );
+ if ( $ruleType === 'other' ) {
+ // Don't record "other" rules, which have an empty condition
+ continue;
+ }
+ $rules[] = $elt->nodeValue;
+ $ruleTypes[] = $ruleType;
+ }
+ foreach ( explode( ' ', $codes ) as $code ) {
+ $this->pluralRules[$code] = $rules;
+ $this->pluralRuleTypes[$code] = $ruleTypes;
+ }
+ }
+ }
+
+ /**
+ * Read the data from the source files for a given language, and register
+ * the relevant dependencies in the $deps array. If the localisation
+ * exists, the data array is returned, otherwise false is returned.
+ *
+ * @param string $code
+ * @param array &$deps
+ * @return array
+ */
+ protected function readSourceFilesAndRegisterDeps( $code, &$deps ) {
+ global $IP;
+
+ // This reads in the PHP i18n file with non-messages l10n data
+ $fileName = Language::getMessagesFileName( $code );
+ if ( !file_exists( $fileName ) ) {
+ $data = [];
+ } else {
+ $deps[] = new FileDependency( $fileName );
+ $data = $this->readPHPFile( $fileName, 'core' );
+ }
+
+ # Load CLDR plural rules for JavaScript
+ $data['pluralRules'] = $this->getPluralRules( $code );
+ # And for PHP
+ $data['compiledPluralRules'] = $this->getCompiledPluralRules( $code );
+ # Load plural rule types
+ $data['pluralRuleTypes'] = $this->getPluralRuleTypes( $code );
+
+ $deps['plurals'] = new FileDependency( "$IP/languages/data/plurals.xml" );
+ $deps['plurals-mw'] = new FileDependency( "$IP/languages/data/plurals-mediawiki.xml" );
+
+ return $data;
+ }
+
+ /**
+ * Merge two localisation values, a primary and a fallback, overwriting the
+ * primary value in place.
+ * @param string $key
+ * @param mixed &$value
+ * @param mixed $fallbackValue
+ */
+ protected function mergeItem( $key, &$value, $fallbackValue ) {
+ if ( !is_null( $value ) ) {
+ if ( !is_null( $fallbackValue ) ) {
+ if ( in_array( $key, self::$mergeableMapKeys ) ) {
+ $value = $value + $fallbackValue;
+ } elseif ( in_array( $key, self::$mergeableListKeys ) ) {
+ $value = array_unique( array_merge( $fallbackValue, $value ) );
+ } elseif ( in_array( $key, self::$mergeableAliasListKeys ) ) {
+ $value = array_merge_recursive( $value, $fallbackValue );
+ } elseif ( in_array( $key, self::$optionalMergeKeys ) ) {
+ if ( !empty( $value['inherit'] ) ) {
+ $value = array_merge( $fallbackValue, $value );
+ }
+
+ if ( isset( $value['inherit'] ) ) {
+ unset( $value['inherit'] );
+ }
+ } elseif ( in_array( $key, self::$magicWordKeys ) ) {
+ $this->mergeMagicWords( $value, $fallbackValue );
+ }
+ }
+ } else {
+ $value = $fallbackValue;
+ }
+ }
+
+ /**
+ * @param mixed &$value
+ * @param mixed $fallbackValue
+ */
+ protected function mergeMagicWords( &$value, $fallbackValue ) {
+ foreach ( $fallbackValue as $magicName => $fallbackInfo ) {
+ if ( !isset( $value[$magicName] ) ) {
+ $value[$magicName] = $fallbackInfo;
+ } else {
+ $oldSynonyms = array_slice( $fallbackInfo, 1 );
+ $newSynonyms = array_slice( $value[$magicName], 1 );
+ $synonyms = array_values( array_unique( array_merge(
+ $newSynonyms, $oldSynonyms ) ) );
+ $value[$magicName] = array_merge( [ $fallbackInfo[0] ], $synonyms );
+ }
+ }
+ }
+
+ /**
+ * Given an array mapping language code to localisation value, such as is
+ * found in extension *.i18n.php files, iterate through a fallback sequence
+ * to merge the given data with an existing primary value.
+ *
+ * Returns true if any data from the extension array was used, false
+ * otherwise.
+ * @param array $codeSequence
+ * @param string $key
+ * @param mixed &$value
+ * @param mixed $fallbackValue
+ * @return bool
+ */
+ protected function mergeExtensionItem( $codeSequence, $key, &$value, $fallbackValue ) {
+ $used = false;
+ foreach ( $codeSequence as $code ) {
+ if ( isset( $fallbackValue[$code] ) ) {
+ $this->mergeItem( $key, $value, $fallbackValue[$code] );
+ $used = true;
+ }
+ }
+
+ return $used;
+ }
+
+ /**
+ * Gets the combined list of messages dirs from
+ * core and extensions
+ *
+ * @since 1.25
+ * @return array
+ */
+ public function getMessagesDirs() {
+ global $IP;
+
+ $config = MediaWikiServices::getInstance()->getMainConfig();
+ $messagesDirs = $config->get( 'MessagesDirs' );
+ return [
+ 'core' => "$IP/languages/i18n",
+ 'api' => "$IP/includes/api/i18n",
+ 'oojs-ui' => "$IP/resources/lib/oojs-ui/i18n",
+ ] + $messagesDirs;
+ }
+
+ /**
+ * Load localisation data for a given language for both core and extensions
+ * and save it to the persistent cache store and the process cache
+ * @param string $code
+ * @throws MWException
+ */
+ public function recache( $code ) {
+ global $wgExtensionMessagesFiles;
+
+ if ( !$code ) {
+ throw new MWException( "Invalid language code requested" );
+ }
+ $this->recachedLangs[$code] = true;
+
+ # Initial values
+ $initialData = array_fill_keys( self::$allKeys, null );
+ $coreData = $initialData;
+ $deps = [];
+
+ # Load the primary localisation from the source file
+ $data = $this->readSourceFilesAndRegisterDeps( $code, $deps );
+ if ( $data === false ) {
+ wfDebug( __METHOD__ . ": no localisation file for $code, using fallback to en\n" );
+ $coreData['fallback'] = 'en';
+ } else {
+ wfDebug( __METHOD__ . ": got localisation for $code from source\n" );
+
+ # Merge primary localisation
+ foreach ( $data as $key => $value ) {
+ $this->mergeItem( $key, $coreData[$key], $value );
+ }
+ }
+
+ # Fill in the fallback if it's not there already
+ if ( is_null( $coreData['fallback'] ) ) {
+ $coreData['fallback'] = $code === 'en' ? false : 'en';
+ }
+ if ( $coreData['fallback'] === false ) {
+ $coreData['fallbackSequence'] = [];
+ } else {
+ $coreData['fallbackSequence'] = array_map( 'trim', explode( ',', $coreData['fallback'] ) );
+ $len = count( $coreData['fallbackSequence'] );
+
+ # Ensure that the sequence ends at en
+ if ( $coreData['fallbackSequence'][$len - 1] !== 'en' ) {
+ $coreData['fallbackSequence'][] = 'en';
+ }
+ }
+
+ $codeSequence = array_merge( [ $code ], $coreData['fallbackSequence'] );
+ $messageDirs = $this->getMessagesDirs();
+
+ # Load non-JSON localisation data for extensions
+ $extensionData = array_fill_keys( $codeSequence, $initialData );
+ foreach ( $wgExtensionMessagesFiles as $extension => $fileName ) {
+ if ( isset( $messageDirs[$extension] ) ) {
+ # This extension has JSON message data; skip the PHP shim
+ continue;
+ }
+
+ $data = $this->readPHPFile( $fileName, 'extension' );
+ $used = false;
+
+ foreach ( $data as $key => $item ) {
+ foreach ( $codeSequence as $csCode ) {
+ if ( isset( $item[$csCode] ) ) {
+ $this->mergeItem( $key, $extensionData[$csCode][$key], $item[$csCode] );
+ $used = true;
+ }
+ }
+ }
+
+ if ( $used ) {
+ $deps[] = new FileDependency( $fileName );
+ }
+ }
+
+ # Load the localisation data for each fallback, then merge it into the full array
+ $allData = $initialData;
+ foreach ( $codeSequence as $csCode ) {
+ $csData = $initialData;
+
+ # Load core messages and the extension localisations.
+ foreach ( $messageDirs as $dirs ) {
+ foreach ( (array)$dirs as $dir ) {
+ $fileName = "$dir/$csCode.json";
+ $data = $this->readJSONFile( $fileName );
+
+ foreach ( $data as $key => $item ) {
+ $this->mergeItem( $key, $csData[$key], $item );
+ }
+
+ $deps[] = new FileDependency( $fileName );
+ }
+ }
+
+ # Merge non-JSON extension data
+ if ( isset( $extensionData[$csCode] ) ) {
+ foreach ( $extensionData[$csCode] as $key => $item ) {
+ $this->mergeItem( $key, $csData[$key], $item );
+ }
+ }
+
+ if ( $csCode === $code ) {
+ # Merge core data into extension data
+ foreach ( $coreData as $key => $item ) {
+ $this->mergeItem( $key, $csData[$key], $item );
+ }
+ } else {
+ # Load the secondary localisation from the source file to
+ # avoid infinite cycles on cyclic fallbacks
+ $fbData = $this->readSourceFilesAndRegisterDeps( $csCode, $deps );
+ if ( $fbData !== false ) {
+ # Only merge the keys that make sense to merge
+ foreach ( self::$allKeys as $key ) {
+ if ( !isset( $fbData[$key] ) ) {
+ continue;
+ }
+
+ if ( is_null( $coreData[$key] ) || $this->isMergeableKey( $key ) ) {
+ $this->mergeItem( $key, $csData[$key], $fbData[$key] );
+ }
+ }
+ }
+ }
+
+ # Allow extensions an opportunity to adjust the data for this
+ # fallback
+ Hooks::run( 'LocalisationCacheRecacheFallback', [ $this, $csCode, &$csData ] );
+
+ # Merge the data for this fallback into the final array
+ if ( $csCode === $code ) {
+ $allData = $csData;
+ } else {
+ foreach ( self::$allKeys as $key ) {
+ if ( !isset( $csData[$key] ) ) {
+ continue;
+ }
+
+ if ( is_null( $allData[$key] ) || $this->isMergeableKey( $key ) ) {
+ $this->mergeItem( $key, $allData[$key], $csData[$key] );
+ }
+ }
+ }
+ }
+
+ # Add cache dependencies for any referenced globals
+ $deps['wgExtensionMessagesFiles'] = new GlobalDependency( 'wgExtensionMessagesFiles' );
+ // The 'MessagesDirs' config setting is used in LocalisationCache::getMessagesDirs().
+ // We use the key 'wgMessagesDirs' for historical reasons.
+ $deps['wgMessagesDirs'] = new MainConfigDependency( 'MessagesDirs' );
+ $deps['version'] = new ConstantDependency( 'LocalisationCache::VERSION' );
+
+ # Add dependencies to the cache entry
+ $allData['deps'] = $deps;
+
+ # Replace spaces with underscores in namespace names
+ $allData['namespaceNames'] = str_replace( ' ', '_', $allData['namespaceNames'] );
+
+ # And do the same for special page aliases. $page is an array.
+ foreach ( $allData['specialPageAliases'] as &$page ) {
+ $page = str_replace( ' ', '_', $page );
+ }
+ # Decouple the reference to prevent accidental damage
+ unset( $page );
+
+ # If there were no plural rules, return an empty array
+ if ( $allData['pluralRules'] === null ) {
+ $allData['pluralRules'] = [];
+ }
+ if ( $allData['compiledPluralRules'] === null ) {
+ $allData['compiledPluralRules'] = [];
+ }
+ # If there were no plural rule types, return an empty array
+ if ( $allData['pluralRuleTypes'] === null ) {
+ $allData['pluralRuleTypes'] = [];
+ }
+
+ # Set the list keys
+ $allData['list'] = [];
+ foreach ( self::$splitKeys as $key ) {
+ $allData['list'][$key] = array_keys( $allData[$key] );
+ }
+ # Run hooks
+ $purgeBlobs = true;
+ Hooks::run( 'LocalisationCacheRecache', [ $this, $code, &$allData, &$purgeBlobs ] );
+
+ if ( is_null( $allData['namespaceNames'] ) ) {
+ throw new MWException( __METHOD__ . ': Localisation data failed sanity check! ' .
+ 'Check that your languages/messages/MessagesEn.php file is intact.' );
+ }
+
+ # Set the preload key
+ $allData['preload'] = $this->buildPreload( $allData );
+
+ # Save to the process cache and register the items loaded
+ $this->data[$code] = $allData;
+ foreach ( $allData as $key => $item ) {
+ $this->loadedItems[$code][$key] = true;
+ }
+
+ # Save to the persistent cache
+ $this->store->startWrite( $code );
+ foreach ( $allData as $key => $value ) {
+ if ( in_array( $key, self::$splitKeys ) ) {
+ foreach ( $value as $subkey => $subvalue ) {
+ $this->store->set( "$key:$subkey", $subvalue );
+ }
+ } else {
+ $this->store->set( $key, $value );
+ }
+ }
+ $this->store->finishWrite();
+
+ # Clear out the MessageBlobStore
+ # HACK: If using a null (i.e. disabled) storage backend, we
+ # can't write to the MessageBlobStore either
+ if ( $purgeBlobs && !$this->store instanceof LCStoreNull ) {
+ $blobStore = new MessageBlobStore();
+ $blobStore->clear();
+ }
+ }
+
+ /**
+ * Build the preload item from the given pre-cache data.
+ *
+ * The preload item will be loaded automatically, improving performance
+ * for the commonly-requested items it contains.
+ * @param array $data
+ * @return array
+ */
+ protected function buildPreload( $data ) {
+ $preload = [ 'messages' => [] ];
+ foreach ( self::$preloadedKeys as $key ) {
+ $preload[$key] = $data[$key];
+ }
+
+ foreach ( $data['preloadedMessages'] as $subkey ) {
+ if ( isset( $data['messages'][$subkey] ) ) {
+ $subitem = $data['messages'][$subkey];
+ } else {
+ $subitem = null;
+ }
+ $preload['messages'][$subkey] = $subitem;
+ }
+
+ return $preload;
+ }
+
+ /**
+ * Unload the data for a given language from the object cache.
+ * Reduces memory usage.
+ * @param string $code
+ */
+ public function unload( $code ) {
+ unset( $this->data[$code] );
+ unset( $this->loadedItems[$code] );
+ unset( $this->loadedSubitems[$code] );
+ unset( $this->initialisedLangs[$code] );
+ unset( $this->shallowFallbacks[$code] );
+
+ foreach ( $this->shallowFallbacks as $shallowCode => $fbCode ) {
+ if ( $fbCode === $code ) {
+ $this->unload( $shallowCode );
+ }
+ }
+ }
+
+ /**
+ * Unload all data
+ */
+ public function unloadAll() {
+ foreach ( $this->initialisedLangs as $lang => $unused ) {
+ $this->unload( $lang );
+ }
+ }
+
+ /**
+ * Disable the storage backend
+ */
+ public function disableBackend() {
+ $this->store = new LCStoreNull;
+ $this->manualRecache = false;
+ }
+
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff