<?php
-
-/*
- * Created on Sep 7, 2006
+/**
*
- * API for MediaWiki 1.8+
*
- * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
+ * Created on Sep 7, 2006
+ *
+ * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
*
* 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
*
* 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
*/
-if (!defined('MEDIAWIKI')) {
- // Eclipse helper - will be ignored in production
- require_once ('ApiBase.php');
-}
+use Wikimedia\Rdbms\IDatabase;
+use Wikimedia\Rdbms\ResultWrapper;
/**
* This is a base class for all Query modules.
- * It provides some common functionality such as constructing various SQL queries.
- *
- * @addtogroup API
+ * It provides some common functionality such as constructing various SQL
+ * queries.
+ *
+ * @ingroup API
*/
abstract class ApiQueryBase extends ApiBase {
- private $mQueryModule, $mDb, $tables, $where, $fields, $options;
+ private $mQueryModule, $mDb, $tables, $where, $fields, $options, $join_conds;
- public function __construct($query, $moduleName, $paramPrefix = '') {
- parent :: __construct($query->getMain(), $moduleName, $paramPrefix);
- $this->mQueryModule = $query;
+ /**
+ * @param ApiQuery $queryModule
+ * @param string $moduleName
+ * @param string $paramPrefix
+ */
+ public function __construct( ApiQuery $queryModule, $moduleName, $paramPrefix = '' ) {
+ parent::__construct( $queryModule->getMain(), $moduleName, $paramPrefix );
+ $this->mQueryModule = $queryModule;
$this->mDb = null;
$this->resetQueryParams();
}
+ /************************************************************************//**
+ * @name Methods to implement
+ * @{
+ */
+
+ /**
+ * Get the cache mode for the data generated by this module. Override
+ * this in the module subclass. For possible return values and other
+ * details about cache modes, see ApiMain::setCacheMode()
+ *
+ * Public caching will only be allowed if *all* the modules that supply
+ * data for a given request return a cache mode of public.
+ *
+ * @param array $params
+ * @return string
+ */
+ public function getCacheMode( $params ) {
+ return 'private';
+ }
+
+ /**
+ * Override this method to request extra fields from the pageSet
+ * using $pageSet->requestField('fieldName')
+ *
+ * Note this only makes sense for 'prop' modules, as 'list' and 'meta'
+ * modules should not be using the pageset.
+ *
+ * @param ApiPageSet $pageSet
+ */
+ public function requestExtraData( $pageSet ) {
+ }
+
+ /**@}*/
+
+ /************************************************************************//**
+ * @name Data access
+ * @{
+ */
+
+ /**
+ * Get the main Query module
+ * @return ApiQuery
+ */
+ public function getQuery() {
+ return $this->mQueryModule;
+ }
+
+ /** @inheritDoc */
+ public function getParent() {
+ return $this->getQuery();
+ }
+
+ /**
+ * Get the Query database connection (read-only)
+ * @return IDatabase
+ */
+ protected function getDB() {
+ if ( is_null( $this->mDb ) ) {
+ $this->mDb = $this->getQuery()->getDB();
+ }
+
+ return $this->mDb;
+ }
+
+ /**
+ * Selects the query database connection with the given name.
+ * See ApiQuery::getNamedDB() for more information
+ * @param string $name Name to assign to the database connection
+ * @param int $db One of the DB_* constants
+ * @param string|string[] $groups Query groups
+ * @return IDatabase
+ */
+ public function selectNamedDB( $name, $db, $groups ) {
+ $this->mDb = $this->getQuery()->getNamedDB( $name, $db, $groups );
+ return $this->mDb;
+ }
+
+ /**
+ * Get the PageSet object to work on
+ * @return ApiPageSet
+ */
+ protected function getPageSet() {
+ return $this->getQuery()->getPageSet();
+ }
+
+ /**@}*/
+
+ /************************************************************************//**
+ * @name Querying
+ * @{
+ */
+
+ /**
+ * Blank the internal arrays with query parameters
+ */
protected function resetQueryParams() {
- $this->tables = array ();
- $this->where = array ();
- $this->fields = array ();
- $this->options = array ();
+ $this->tables = [];
+ $this->where = [];
+ $this->fields = [];
+ $this->options = [];
+ $this->join_conds = [];
}
- protected function addTables($tables, $alias = null) {
- if (is_array($tables)) {
- if (!is_null($alias))
- ApiBase :: dieDebug(__METHOD__, 'Multiple table aliases not supported');
- $this->tables = array_merge($this->tables, $tables);
+ /**
+ * Add a set of tables to the internal array
+ * @param string|string[] $tables Table name or array of table names
+ * @param string|null $alias Table alias, or null for no alias. Cannot be
+ * used with multiple tables
+ */
+ protected function addTables( $tables, $alias = null ) {
+ if ( is_array( $tables ) ) {
+ if ( !is_null( $alias ) ) {
+ ApiBase::dieDebug( __METHOD__, 'Multiple table aliases not supported' );
+ }
+ $this->tables = array_merge( $this->tables, $tables );
} else {
- if (!is_null($alias))
- $tables = $this->getDB()->tableName($tables) . ' ' . $alias;
- $this->tables[] = $tables;
+ if ( !is_null( $alias ) ) {
+ $this->tables[$alias] = $tables;
+ } else {
+ $this->tables[] = $tables;
+ }
+ }
+ }
+
+ /**
+ * Add a set of JOIN conditions to the internal array
+ *
+ * JOIN conditions are formatted as [ tablename => [ jointype, conditions ] ]
+ * e.g. [ 'page' => [ 'LEFT JOIN', 'page_id=rev_page' ] ].
+ * Conditions may be a string or an addWhere()-style array.
+ * @param array $join_conds JOIN conditions
+ */
+ protected function addJoinConds( $join_conds ) {
+ if ( !is_array( $join_conds ) ) {
+ ApiBase::dieDebug( __METHOD__, 'Join conditions have to be arrays' );
}
+ $this->join_conds = array_merge( $this->join_conds, $join_conds );
}
- protected function addFields($value) {
- if (is_array($value))
- $this->fields = array_merge($this->fields, $value);
- else
+ /**
+ * Add a set of fields to select to the internal array
+ * @param array|string $value Field name or array of field names
+ */
+ protected function addFields( $value ) {
+ if ( is_array( $value ) ) {
+ $this->fields = array_merge( $this->fields, $value );
+ } else {
$this->fields[] = $value;
+ }
}
- protected function addFieldsIf($value, $condition) {
- if ($condition) {
- $this->addFields($value);
+ /**
+ * Same as addFields(), but add the fields only if a condition is met
+ * @param array|string $value See addFields()
+ * @param bool $condition If false, do nothing
+ * @return bool $condition
+ */
+ protected function addFieldsIf( $value, $condition ) {
+ if ( $condition ) {
+ $this->addFields( $value );
+
return true;
}
+
return false;
}
- protected function addWhere($value) {
- if (is_array($value))
- $this->where = array_merge($this->where, $value);
- else
+ /**
+ * Add a set of WHERE clauses to the internal array.
+ * Clauses can be formatted as 'foo=bar' or [ 'foo' => 'bar' ],
+ * the latter only works if the value is a constant (i.e. not another field)
+ *
+ * If $value is an empty array, this function does nothing.
+ *
+ * For example, [ 'foo=bar', 'baz' => 3, 'bla' => 'foo' ] translates
+ * to "foo=bar AND baz='3' AND bla='foo'"
+ * @param string|array $value
+ */
+ protected function addWhere( $value ) {
+ if ( is_array( $value ) ) {
+ // Sanity check: don't insert empty arrays,
+ // Database::makeList() chokes on them
+ if ( count( $value ) ) {
+ $this->where = array_merge( $this->where, $value );
+ }
+ } else {
$this->where[] = $value;
+ }
}
- protected function addWhereIf($value, $condition) {
- if ($condition) {
- $this->addWhere($value);
+ /**
+ * Same as addWhere(), but add the WHERE clauses only if a condition is met
+ * @param string|array $value
+ * @param bool $condition If false, do nothing
+ * @return bool $condition
+ */
+ protected function addWhereIf( $value, $condition ) {
+ if ( $condition ) {
+ $this->addWhere( $value );
+
return true;
}
+
return false;
}
- protected function addWhereFld($field, $value) {
- if (!is_null($value))
+ /**
+ * Equivalent to addWhere(array($field => $value))
+ * @param string $field Field name
+ * @param string|string[] $value Value; ignored if null or empty array;
+ */
+ protected function addWhereFld( $field, $value ) {
+ // Use count() to its full documented capabilities to simultaneously
+ // test for null, empty array or empty countable object
+ if ( count( $value ) ) {
$this->where[$field] = $value;
+ }
}
- protected function addWhereRange($field, $dir, $start, $end) {
- $isDirNewer = ($dir === 'newer');
- $after = ($isDirNewer ? '>=' : '<=');
- $before = ($isDirNewer ? '<=' : '>=');
+ /**
+ * Add a WHERE clause corresponding to a range, and an ORDER BY
+ * clause to sort in the right direction
+ * @param string $field Field name
+ * @param string $dir If 'newer', sort in ascending order, otherwise
+ * sort in descending order
+ * @param string $start Value to start the list at. If $dir == 'newer'
+ * this is the lower boundary, otherwise it's the upper boundary
+ * @param string $end Value to end the list at. If $dir == 'newer' this
+ * is the upper boundary, otherwise it's the lower boundary
+ * @param bool $sort If false, don't add an ORDER BY clause
+ */
+ protected function addWhereRange( $field, $dir, $start, $end, $sort = true ) {
+ $isDirNewer = ( $dir === 'newer' );
+ $after = ( $isDirNewer ? '>=' : '<=' );
+ $before = ( $isDirNewer ? '<=' : '>=' );
$db = $this->getDB();
- if (!is_null($start))
- $this->addWhere($field . $after . $db->addQuotes($start));
+ if ( !is_null( $start ) ) {
+ $this->addWhere( $field . $after . $db->addQuotes( $start ) );
+ }
+
+ if ( !is_null( $end ) ) {
+ $this->addWhere( $field . $before . $db->addQuotes( $end ) );
+ }
- if (!is_null($end))
- $this->addWhere($field . $before . $db->addQuotes($end));
+ if ( $sort ) {
+ $order = $field . ( $isDirNewer ? '' : ' DESC' );
+ // Append ORDER BY
+ $optionOrderBy = isset( $this->options['ORDER BY'] )
+ ? (array)$this->options['ORDER BY']
+ : [];
+ $optionOrderBy[] = $order;
+ $this->addOption( 'ORDER BY', $optionOrderBy );
+ }
+ }
- $this->addOption('ORDER BY', $field . ($isDirNewer ? '' : ' DESC'));
+ /**
+ * Add a WHERE clause corresponding to a range, similar to addWhereRange,
+ * but converts $start and $end to database timestamps.
+ * @see addWhereRange
+ * @param string $field
+ * @param string $dir
+ * @param string $start
+ * @param string $end
+ * @param bool $sort
+ */
+ protected function addTimestampWhereRange( $field, $dir, $start, $end, $sort = true ) {
+ $db = $this->getDB();
+ $this->addWhereRange( $field, $dir,
+ $db->timestampOrNull( $start ), $db->timestampOrNull( $end ), $sort );
}
- protected function addOption($name, $value = null) {
- if (is_null($value))
+ /**
+ * Add an option such as LIMIT or USE INDEX. If an option was set
+ * before, the old value will be overwritten
+ * @param string $name Option name
+ * @param string|string[] $value Option value
+ */
+ protected function addOption( $name, $value = null ) {
+ if ( is_null( $value ) ) {
$this->options[] = $name;
- else
+ } else {
$this->options[$name] = $value;
+ }
}
- protected function select($method) {
+ /**
+ * Execute a SELECT query based on the values in the internal arrays
+ * @param string $method Function the query should be attributed to.
+ * You should usually use __METHOD__ here
+ * @param array $extraQuery Query data to add but not store in the object
+ * Format is [
+ * 'tables' => ...,
+ * 'fields' => ...,
+ * 'where' => ...,
+ * 'options' => ...,
+ * 'join_conds' => ...
+ * ]
+ * @param array|null &$hookData If set, the ApiQueryBaseBeforeQuery and
+ * ApiQueryBaseAfterQuery hooks will be called, and the
+ * ApiQueryBaseProcessRow hook will be expected.
+ * @return ResultWrapper
+ */
+ protected function select( $method, $extraQuery = [], array &$hookData = null ) {
+ $tables = array_merge(
+ $this->tables,
+ isset( $extraQuery['tables'] ) ? (array)$extraQuery['tables'] : []
+ );
+ $fields = array_merge(
+ $this->fields,
+ isset( $extraQuery['fields'] ) ? (array)$extraQuery['fields'] : []
+ );
+ $where = array_merge(
+ $this->where,
+ isset( $extraQuery['where'] ) ? (array)$extraQuery['where'] : []
+ );
+ $options = array_merge(
+ $this->options,
+ isset( $extraQuery['options'] ) ? (array)$extraQuery['options'] : []
+ );
+ $join_conds = array_merge(
+ $this->join_conds,
+ isset( $extraQuery['join_conds'] ) ? (array)$extraQuery['join_conds'] : []
+ );
+
+ if ( $hookData !== null ) {
+ Hooks::run( 'ApiQueryBaseBeforeQuery',
+ [ $this, &$tables, &$fields, &$where, &$options, &$join_conds, &$hookData ]
+ );
+ }
- // getDB has its own profileDBIn/Out calls
- $db = $this->getDB();
+ $res = $this->getDB()->select( $tables, $fields, $where, $method, $options, $join_conds );
- $this->profileDBIn();
- $res = $db->select($this->tables, $this->fields, $this->where, $method, $this->options);
- $this->profileDBOut();
+ if ( $hookData !== null ) {
+ Hooks::run( 'ApiQueryBaseAfterQuery', [ $this, $res, &$hookData ] );
+ }
return $res;
}
- public static function addTitleInfo(&$arr, $title, $prefix='') {
- $arr[$prefix . 'ns'] = intval($title->getNamespace());
- $arr[$prefix . 'title'] = $title->getPrefixedText();
- }
-
/**
- * Override this method to request extra fields from the pageSet
- * using $pageSet->requestField('fieldName')
+ * Call the ApiQueryBaseProcessRow hook
+ *
+ * Generally, a module that passed $hookData to self::select() will call
+ * this just before calling ApiResult::addValue(), and treat a false return
+ * here in the same way it treats a false return from addValue().
+ *
+ * @since 1.28
+ * @param object $row Database row
+ * @param array &$data Data to be added to the result
+ * @param array &$hookData Hook data from ApiQueryBase::select()
+ * @return bool Return false if row processing should end with continuation
*/
- public function requestExtraData($pageSet) {
+ protected function processRow( $row, array &$data, array &$hookData ) {
+ return Hooks::run( 'ApiQueryBaseProcessRow', [ $this, $row, &$data, &$hookData ] );
}
/**
- * Get the main Query module
+ * @param string $query
+ * @param string $protocol
+ * @return null|string
*/
- public function getQuery() {
- return $this->mQueryModule;
+ public function prepareUrlQuerySearchString( $query = null, $protocol = null ) {
+ $db = $this->getDB();
+ if ( !is_null( $query ) || $query != '' ) {
+ if ( is_null( $protocol ) ) {
+ $protocol = 'http://';
+ }
+
+ $likeQuery = LinkFilter::makeLikeArray( $query, $protocol );
+ if ( !$likeQuery ) {
+ $this->dieWithError( 'apierror-badquery' );
+ }
+
+ $likeQuery = LinkFilter::keepOneWildcard( $likeQuery );
+
+ return 'el_index ' . $db->buildLike( $likeQuery );
+ } elseif ( !is_null( $protocol ) ) {
+ return 'el_index ' . $db->buildLike( "$protocol", $db->anyString() );
+ }
+
+ return null;
}
/**
- * Add sub-element under the page element with the given pageId.
+ * Filters hidden users (where the user doesn't have the right to view them)
+ * Also adds relevant block information
+ *
+ * @param bool $showBlockInfo
+ * @return void
*/
- protected function addPageSubItems($pageId, $data) {
- $result = $this->getResult();
- $result->setIndexedTagName($data, $this->getModulePrefix());
- $result->addValue(array ('query', 'pages', intval($pageId)),
- $this->getModuleName(),
- $data);
+ public function showHiddenUsersAddBlockInfo( $showBlockInfo ) {
+ $this->addTables( 'ipblocks' );
+ $this->addJoinConds( [
+ 'ipblocks' => [ 'LEFT JOIN', 'ipb_user=user_id' ],
+ ] );
+
+ $this->addFields( 'ipb_deleted' );
+
+ if ( $showBlockInfo ) {
+ $this->addFields( [
+ 'ipb_id',
+ 'ipb_by',
+ 'ipb_by_text',
+ 'ipb_expiry',
+ 'ipb_timestamp'
+ ] );
+ $commentQuery = CommentStore::newKey( 'ipb_reason' )->getJoin();
+ $this->addTables( $commentQuery['tables'] );
+ $this->addFields( $commentQuery['fields'] );
+ $this->addJoinConds( $commentQuery['joins'] );
+ }
+
+ // Don't show hidden names
+ if ( !$this->getUser()->isAllowed( 'hideuser' ) ) {
+ $this->addWhere( 'ipb_deleted = 0 OR ipb_deleted IS NULL' );
+ }
}
- protected function setContinueEnumParameter($paramName, $paramValue) {
-
- $paramName = $this->encodeParamName($paramName);
- $msg = array( $paramName => $paramValue );
+ /**@}*/
-// This is an alternative continue format as a part of the URL string
-// ApiResult :: setContent($msg, $paramName . '=' . urlencode($paramValue));
-
- $this->getResult()->addValue('query-continue', $this->getModuleName(), $msg);
- }
+ /************************************************************************//**
+ * @name Utility methods
+ * @{
+ */
/**
- * Get the Query database connection (readonly)
+ * Add information (title and namespace) about a Title object to a
+ * result array
+ * @param array &$arr Result array à la ApiResult
+ * @param Title $title
+ * @param string $prefix Module prefix
*/
- protected function getDB() {
- if (is_null($this->mDb))
- $this->mDb = $this->getQuery()->getDB();
- return $this->mDb;
+ public static function addTitleInfo( &$arr, $title, $prefix = '' ) {
+ $arr[$prefix . 'ns'] = intval( $title->getNamespace() );
+ $arr[$prefix . 'title'] = $title->getPrefixedText();
}
/**
- * Selects the query database connection with the given name.
- * If no such connection has been requested before, it will be created.
- * Subsequent calls with the same $name will return the same connection
- * as the first, regardless of $db or $groups new values.
+ * Add a sub-element under the page element with the given page ID
+ * @param int $pageId Page ID
+ * @param array $data Data array à la ApiResult
+ * @return bool Whether the element fit in the result
*/
- public function selectNamedDB($name, $db, $groups) {
- $this->mDb = $this->getQuery()->getNamedDB($name, $db, $groups);
+ protected function addPageSubItems( $pageId, $data ) {
+ $result = $this->getResult();
+ ApiResult::setIndexedTagName( $data, $this->getModulePrefix() );
+
+ return $result->addValue( [ 'query', 'pages', intval( $pageId ) ],
+ $this->getModuleName(),
+ $data );
}
/**
- * Get the PageSet object to work on
- * @return ApiPageSet data
+ * Same as addPageSubItems(), but one element of $data at a time
+ * @param int $pageId Page ID
+ * @param array $item Data array à la ApiResult
+ * @param string $elemname XML element name. If null, getModuleName()
+ * is used
+ * @return bool Whether the element fit in the result
*/
- protected function getPageSet() {
- return $this->getQuery()->getPageSet();
+ protected function addPageSubItem( $pageId, $item, $elemname = null ) {
+ if ( is_null( $elemname ) ) {
+ $elemname = $this->getModulePrefix();
+ }
+ $result = $this->getResult();
+ $fit = $result->addValue( [ 'query', 'pages', $pageId,
+ $this->getModuleName() ], null, $item );
+ if ( !$fit ) {
+ return false;
+ }
+ $result->addIndexedTagName( [ 'query', 'pages', $pageId,
+ $this->getModuleName() ], $elemname );
+
+ return true;
}
/**
- * This is a very simplistic utility function
- * to convert a non-namespaced title string to a db key.
- * It will replace all ' ' with '_'
+ * Set a query-continue value
+ * @param string $paramName Parameter name
+ * @param string|array $paramValue Parameter value
*/
- public static function titleToKey($title) {
- return str_replace(' ', '_', $title);
+ protected function setContinueEnumParameter( $paramName, $paramValue ) {
+ $this->getContinuationManager()->addContinueParam( $this, $paramName, $paramValue );
}
- public static function keyToTitle($key) {
- return str_replace('_', ' ', $key);
- }
-
- public function getTokenFlag($tokenArr, $action) {
- if (in_array($action, $tokenArr)) {
- global $wgUser;
- if ($wgUser->isAllowed($action))
- return true;
- else
- $this->dieUsage("Action '$action' is not allowed for the current user", 'permissiondenied');
+ /**
+ * Convert an input title or title prefix into a dbkey.
+ *
+ * $namespace should always be specified in order to handle per-namespace
+ * capitalization settings.
+ *
+ * @param string $titlePart Title part
+ * @param int $namespace Namespace of the title
+ * @return string DBkey (no namespace prefix)
+ */
+ public function titlePartToKey( $titlePart, $namespace = NS_MAIN ) {
+ $t = Title::makeTitleSafe( $namespace, $titlePart . 'x' );
+ if ( !$t || $t->hasFragment() ) {
+ // Invalid title (e.g. bad chars) or contained a '#'.
+ $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $titlePart ) ] );
+ }
+ if ( $namespace != $t->getNamespace() || $t->isExternal() ) {
+ // This can happen in two cases. First, if you call titlePartToKey with a title part
+ // that looks like a namespace, but with $defaultNamespace = NS_MAIN. It would be very
+ // difficult to handle such a case. Such cases cannot exist and are therefore treated
+ // as invalid user input. The second case is when somebody specifies a title interwiki
+ // prefix.
+ $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $titlePart ) ] );
}
- return false;
- }
-
- public static function getBaseVersion() {
- return __CLASS__ . ': $Id: ApiQueryBase.php 24533 2007-08-01 22:46:22Z yurik $';
- }
-}
-/**
- * @addtogroup API
- */
-abstract class ApiQueryGeneratorBase extends ApiQueryBase {
+ return substr( $t->getDBkey(), 0, -1 );
+ }
- private $mIsGenerator;
+ /**
+ * Convert an input title or title prefix into a namespace constant and dbkey.
+ *
+ * @since 1.26
+ * @param string $titlePart Title part
+ * @param int $defaultNamespace Default namespace if none is given
+ * @return array (int, string) Namespace number and DBkey
+ */
+ public function prefixedTitlePartToKey( $titlePart, $defaultNamespace = NS_MAIN ) {
+ $t = Title::newFromText( $titlePart . 'x', $defaultNamespace );
+ if ( !$t || $t->hasFragment() || $t->isExternal() ) {
+ // Invalid title (e.g. bad chars) or contained a '#'.
+ $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $titlePart ) ] );
+ }
- public function __construct($query, $moduleName, $paramPrefix = '') {
- parent :: __construct($query, $moduleName, $paramPrefix);
- $this->mIsGenerator = false;
+ return [ $t->getNamespace(), substr( $t->getDBkey(), 0, -1 ) ];
}
- public function setGeneratorMode() {
- $this->mIsGenerator = true;
+ /**
+ * @param string $hash
+ * @return bool
+ */
+ public function validateSha1Hash( $hash ) {
+ return (bool)preg_match( '/^[a-f0-9]{40}$/', $hash );
}
/**
- * Overrides base class to prepend 'g' to every generator parameter
+ * @param string $hash
+ * @return bool
*/
- public function encodeParamName($paramName) {
- if ($this->mIsGenerator)
- return 'g' . parent :: encodeParamName($paramName);
- else
- return parent :: encodeParamName($paramName);
+ public function validateSha1Base36Hash( $hash ) {
+ return (bool)preg_match( '/^[a-z0-9]{31}$/', $hash );
}
/**
- * Execute this module as a generator
- * @param $resultPageSet PageSet: All output should be appended to this object
+ * Check whether the current user has permission to view revision-deleted
+ * fields.
+ * @return bool
*/
- public abstract function executeGenerator($resultPageSet);
-}
+ public function userCanSeeRevDel() {
+ return $this->getUser()->isAllowedAny(
+ 'deletedhistory',
+ 'deletedtext',
+ 'suppressrevision',
+ 'viewsuppressed'
+ );
+ }
+ /**@}*/
+}
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