From ca32f08966f1b51fcb19460f0996bb0c4048e6fe Mon Sep 17 00:00:00 2001 From: Pierre Schmitz Date: Sat, 3 Dec 2011 13:29:22 +0100 Subject: Update to MediaWiki 1.18.0 * also update ArchLinux skin to chagnes in MonoBook * Use only css to hide our menu bar when printing --- includes/WikiPage.php | 2677 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2677 insertions(+) create mode 100644 includes/WikiPage.php (limited to 'includes/WikiPage.php') diff --git a/includes/WikiPage.php b/includes/WikiPage.php new file mode 100644 index 00000000..9a0d9714 --- /dev/null +++ b/includes/WikiPage.php @@ -0,0 +1,2677 @@ +mTitle = $title; + } + + /** + * Create a WikiPage object of the appropriate class for the given title. + * + * @param $title Title + * @return WikiPage object of the appropriate type + */ + public static function factory( Title $title ) { + $ns = $title->getNamespace(); + + if ( $ns == NS_MEDIA ) { + throw new MWException( "NS_MEDIA is a virtual namespace; use NS_FILE." ); + } elseif ( $ns < 0 ) { + throw new MWException( "Invalid or virtual namespace $ns given." ); + } + + switch ( $ns ) { + case NS_FILE: + $page = new WikiFilePage( $title ); + break; + case NS_CATEGORY: + $page = new WikiCategoryPage( $title ); + break; + default: + $page = new WikiPage( $title ); + } + + return $page; + } + + /** + * Constructor from a page id + * + * Always override this for all subclasses (until we use PHP with LSB) + * + * @param $id Int article ID to load + * + * @return WikiPage + */ + public static function newFromID( $id ) { + $t = Title::newFromID( $id ); + # @todo FIXME: Doesn't inherit right + return $t == null ? null : new self( $t ); + # return $t == null ? null : new static( $t ); // PHP 5.3 + } + + /** + * Returns overrides for action handlers. + * Classes listed here will be used instead of the default one when + * (and only when) $wgActions[$action] === true. This allows subclasses + * to override the default behavior. + * + * @return Array + */ + public function getActionOverrides() { + return array(); + } + + /** + * If this page is a redirect, get its target + * + * The target will be fetched from the redirect table if possible. + * If this page doesn't have an entry there, call insertRedirect() + * @return Title|mixed object, or null if this page is not a redirect + */ + public function getRedirectTarget() { + if ( !$this->mTitle->isRedirect() ) { + return null; + } + + if ( $this->mRedirectTarget !== null ) { + return $this->mRedirectTarget; + } + + # Query the redirect table + $dbr = wfGetDB( DB_SLAVE ); + $row = $dbr->selectRow( 'redirect', + array( 'rd_namespace', 'rd_title', 'rd_fragment', 'rd_interwiki' ), + array( 'rd_from' => $this->getId() ), + __METHOD__ + ); + + // rd_fragment and rd_interwiki were added later, populate them if empty + if ( $row && !is_null( $row->rd_fragment ) && !is_null( $row->rd_interwiki ) ) { + return $this->mRedirectTarget = Title::makeTitle( + $row->rd_namespace, $row->rd_title, + $row->rd_fragment, $row->rd_interwiki ); + } + + # This page doesn't have an entry in the redirect table + return $this->mRedirectTarget = $this->insertRedirect(); + } + + /** + * Insert an entry for this page into the redirect table. + * + * Don't call this function directly unless you know what you're doing. + * @return Title object or null if not a redirect + */ + public function insertRedirect() { + // recurse through to only get the final target + $retval = Title::newFromRedirectRecurse( $this->getRawText() ); + if ( !$retval ) { + return null; + } + $this->insertRedirectEntry( $retval ); + return $retval; + } + + /** + * Insert or update the redirect table entry for this page to indicate + * it redirects to $rt . + * @param $rt Title redirect target + */ + public function insertRedirectEntry( $rt ) { + $dbw = wfGetDB( DB_MASTER ); + $dbw->replace( 'redirect', array( 'rd_from' ), + array( + 'rd_from' => $this->getId(), + 'rd_namespace' => $rt->getNamespace(), + 'rd_title' => $rt->getDBkey(), + 'rd_fragment' => $rt->getFragment(), + 'rd_interwiki' => $rt->getInterwiki(), + ), + __METHOD__ + ); + } + + /** + * Get the Title object or URL this page redirects to + * + * @return mixed false, Title of in-wiki target, or string with URL + */ + public function followRedirect() { + return $this->getRedirectURL( $this->getRedirectTarget() ); + } + + /** + * Get the Title object or URL to use for a redirect. We use Title + * objects for same-wiki, non-special redirects and URLs for everything + * else. + * @param $rt Title Redirect target + * @return mixed false, Title object of local target, or string with URL + */ + public function getRedirectURL( $rt ) { + if ( $rt ) { + if ( $rt->getInterwiki() != '' ) { + if ( $rt->isLocal() ) { + // Offsite wikis need an HTTP redirect. + // + // This can be hard to reverse and may produce loops, + // so they may be disabled in the site configuration. + $source = $this->mTitle->getFullURL( 'redirect=no' ); + return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ); + } + } else { + if ( $rt->getNamespace() == NS_SPECIAL ) { + // Gotta handle redirects to special pages differently: + // Fill the HTTP response "Location" header and ignore + // the rest of the page we're on. + // + // This can be hard to reverse, so they may be disabled. + if ( $rt->isSpecial( 'Userlogout' ) ) { + // rolleyes + } else { + return $rt->getFullURL(); + } + } + + return $rt; + } + } + + // No or invalid redirect + return false; + } + + /** + * Get the title object of the article + * @return Title object of this page + */ + public function getTitle() { + return $this->mTitle; + } + + /** + * Clear the object + */ + public function clear() { + $this->mDataLoaded = false; + + $this->mCounter = -1; # Not loaded + $this->mRedirectTarget = null; # Title object if set + $this->mLastRevision = null; # Latest revision + $this->mTimestamp = ''; + $this->mTouched = '19700101000000'; + $this->mIsRedirect = false; + $this->mLatest = false; + $this->mPreparedEdit = false; + } + + /** + * Get the text that needs to be saved in order to undo all revisions + * between $undo and $undoafter. Revisions must belong to the same page, + * must exist and must not be deleted + * @param $undo Revision + * @param $undoafter Revision Must be an earlier revision than $undo + * @return mixed string on success, false on failure + */ + public function getUndoText( Revision $undo, Revision $undoafter = null ) { + $cur_text = $this->getRawText(); + if ( $cur_text === false ) { + return false; // no page + } + $undo_text = $undo->getText(); + $undoafter_text = $undoafter->getText(); + + if ( $cur_text == $undo_text ) { + # No use doing a merge if it's just a straight revert. + return $undoafter_text; + } + + $undone_text = ''; + + if ( !wfMerge( $undo_text, $undoafter_text, $cur_text, $undone_text ) ) { + return false; + } + + return $undone_text; + } + + /** + * Return the list of revision fields that should be selected to create + * a new page. + * + * @return array + */ + public static function selectFields() { + return array( + 'page_id', + 'page_namespace', + 'page_title', + 'page_restrictions', + 'page_counter', + 'page_is_redirect', + 'page_is_new', + 'page_random', + 'page_touched', + 'page_latest', + 'page_len', + ); + } + + /** + * Fetch a page record with the given conditions + * @param $dbr DatabaseBase object + * @param $conditions Array + * @return mixed Database result resource, or false on failure + */ + protected function pageData( $dbr, $conditions ) { + $fields = self::selectFields(); + + wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) ); + + $row = $dbr->selectRow( 'page', $fields, $conditions, __METHOD__ ); + + wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) ); + + return $row; + } + + /** + * Fetch a page record matching the Title object's namespace and title + * using a sanitized title string + * + * @param $dbr DatabaseBase object + * @param $title Title object + * @return mixed Database result resource, or false on failure + */ + public function pageDataFromTitle( $dbr, $title ) { + return $this->pageData( $dbr, array( + 'page_namespace' => $title->getNamespace(), + 'page_title' => $title->getDBkey() ) ); + } + + /** + * Fetch a page record matching the requested ID + * + * @param $dbr DatabaseBase + * @param $id Integer + * @return mixed Database result resource, or false on failure + */ + public function pageDataFromId( $dbr, $id ) { + return $this->pageData( $dbr, array( 'page_id' => $id ) ); + } + + /** + * Set the general counter, title etc data loaded from + * some source. + * + * @param $data Object|String One of the following: + * A DB query result object or... + * "fromdb" to get from a slave DB or... + * "fromdbmaster" to get from the master DB + * @return void + */ + public function loadPageData( $data = 'fromdb' ) { + if ( $data === 'fromdbmaster' ) { + $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle ); + } elseif ( $data === 'fromdb' ) { // slave + $data = $this->pageDataFromTitle( wfGetDB( DB_SLAVE ), $this->mTitle ); + # Use a "last rev inserted" timestamp key to dimish the issue of slave lag. + # Note that DB also stores the master position in the session and checks it. + $touched = $this->getCachedLastEditTime(); + if ( $touched ) { // key set + if ( !$data || $touched > wfTimestamp( TS_MW, $data->page_touched ) ) { + $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle ); + } + } + } + + $lc = LinkCache::singleton(); + + if ( $data ) { + $lc->addGoodLinkObj( $data->page_id, $this->mTitle, + $data->page_len, $data->page_is_redirect, $data->page_latest ); + + $this->mTitle->loadFromRow( $data ); + + # Old-fashioned restrictions + $this->mTitle->loadRestrictions( $data->page_restrictions ); + + $this->mCounter = intval( $data->page_counter ); + $this->mTouched = wfTimestamp( TS_MW, $data->page_touched ); + $this->mIsRedirect = intval( $data->page_is_redirect ); + $this->mLatest = intval( $data->page_latest ); + } else { + $lc->addBadLinkObj( $this->mTitle ); + + $this->mTitle->loadFromRow( false ); + } + + $this->mDataLoaded = true; + } + + /** + * @return int Page ID + */ + public function getId() { + return $this->mTitle->getArticleID(); + } + + /** + * @return bool Whether or not the page exists in the database + */ + public function exists() { + return $this->getId() > 0; + } + + /** + * Check if this page is something we're going to be showing + * some sort of sensible content for. If we return false, page + * views (plain action=view) will return an HTTP 404 response, + * so spiders and robots can know they're following a bad link. + * + * @return bool + */ + public function hasViewableContent() { + return $this->exists() || $this->mTitle->isAlwaysKnown(); + } + + /** + * @return int The view count for the page + */ + public function getCount() { + if ( -1 == $this->mCounter ) { + $id = $this->getId(); + + if ( $id == 0 ) { + $this->mCounter = 0; + } else { + $dbr = wfGetDB( DB_SLAVE ); + $this->mCounter = $dbr->selectField( 'page', + 'page_counter', + array( 'page_id' => $id ), + __METHOD__ + ); + } + } + + return $this->mCounter; + } + + /** + * Determine whether a page would be suitable for being counted as an + * article in the site_stats table based on the title & its content + * + * @param $editInfo Object or false: object returned by prepareTextForEdit(), + * if false, the current database state will be used + * @return Boolean + */ + public function isCountable( $editInfo = false ) { + global $wgArticleCountMethod; + + if ( !$this->mTitle->isContentPage() ) { + return false; + } + + $text = $editInfo ? $editInfo->pst : false; + + if ( $this->isRedirect( $text ) ) { + return false; + } + + switch ( $wgArticleCountMethod ) { + case 'any': + return true; + case 'comma': + if ( $text === false ) { + $text = $this->getRawText(); + } + return strpos( $text, ',' ) !== false; + case 'link': + if ( $editInfo ) { + // ParserOutput::getLinks() is a 2D array of page links, so + // to be really correct we would need to recurse in the array + // but the main array should only have items in it if there are + // links. + return (bool)count( $editInfo->output->getLinks() ); + } else { + return (bool)wfGetDB( DB_SLAVE )->selectField( 'pagelinks', 1, + array( 'pl_from' => $this->getId() ), __METHOD__ ); + } + } + } + + /** + * Tests if the article text represents a redirect + * + * @param $text mixed string containing article contents, or boolean + * @return bool + */ + public function isRedirect( $text = false ) { + if ( $text === false ) { + if ( !$this->mDataLoaded ) { + $this->loadPageData(); + } + + return (bool)$this->mIsRedirect; + } else { + return Title::newFromRedirect( $text ) !== null; + } + } + + /** + * Loads everything except the text + * This isn't necessary for all uses, so it's only done if needed. + */ + protected function loadLastEdit() { + if ( $this->mLastRevision !== null ) { + return; // already loaded + } + + $latest = $this->getLatest(); + if ( !$latest ) { + return; // page doesn't exist or is missing page_latest info + } + + $revision = Revision::newFromPageId( $this->getId(), $latest ); + if ( $revision ) { // sanity + $this->setLastEdit( $revision ); + } + } + + /** + * Set the latest revision + */ + protected function setLastEdit( Revision $revision ) { + $this->mLastRevision = $revision; + $this->mTimestamp = $revision->getTimestamp(); + } + + /** + * Get the latest revision + * @return Revision|null + */ + public function getRevision() { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision; + } + return null; + } + + /** + * Get the text of the current revision. No side-effects... + * + * @param $audience Integer: one of: + * Revision::FOR_PUBLIC to be displayed to all users + * Revision::FOR_THIS_USER to be displayed to $wgUser + * Revision::RAW get the text regardless of permissions + * @return String|false The text of the current revision + */ + public function getText( $audience = Revision::FOR_PUBLIC ) { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->getText( $audience ); + } + return false; + } + + /** + * Get the text of the current revision. No side-effects... + * + * @return String|false The text of the current revision + */ + public function getRawText() { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->getRawText(); + } + return false; + } + + /** + * @return string MW timestamp of last article revision + */ + public function getTimestamp() { + // Check if the field has been filled by WikiPage::setTimestamp() + if ( !$this->mTimestamp ) { + $this->loadLastEdit(); + } + return wfTimestamp( TS_MW, $this->mTimestamp ); + } + + /** + * Set the page timestamp (use only to avoid DB queries) + * @param $ts string MW timestamp of last article revision + * @return void + */ + public function setTimestamp( $ts ) { + $this->mTimestamp = wfTimestamp( TS_MW, $ts ); + } + + /** + * @param $audience Integer: one of: + * Revision::FOR_PUBLIC to be displayed to all users + * Revision::FOR_THIS_USER to be displayed to $wgUser + * Revision::RAW get the text regardless of permissions + * @return int user ID for the user that made the last article revision + */ + public function getUser( $audience = Revision::FOR_PUBLIC ) { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->getUser( $audience ); + } else { + return -1; + } + } + + /** + * @param $audience Integer: one of: + * Revision::FOR_PUBLIC to be displayed to all users + * Revision::FOR_THIS_USER to be displayed to $wgUser + * Revision::RAW get the text regardless of permissions + * @return string username of the user that made the last article revision + */ + public function getUserText( $audience = Revision::FOR_PUBLIC ) { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->getUserText( $audience ); + } else { + return ''; + } + } + + /** + * @param $audience Integer: one of: + * Revision::FOR_PUBLIC to be displayed to all users + * Revision::FOR_THIS_USER to be displayed to $wgUser + * Revision::RAW get the text regardless of permissions + * @return string Comment stored for the last article revision + */ + public function getComment( $audience = Revision::FOR_PUBLIC ) { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->getComment( $audience ); + } else { + return ''; + } + } + + /** + * Returns true if last revision was marked as "minor edit" + * + * @return boolean Minor edit indicator for the last article revision. + */ + public function getMinorEdit() { + $this->loadLastEdit(); + if ( $this->mLastRevision ) { + return $this->mLastRevision->isMinor(); + } else { + return false; + } + } + + /** + * Get a list of users who have edited this article, not including the user who made + * the most recent revision, which you can get from $article->getUser() if you want it + * @return UserArrayFromResult + */ + public function getContributors() { + # @todo FIXME: This is expensive; cache this info somewhere. + + $dbr = wfGetDB( DB_SLAVE ); + + if ( $dbr->implicitGroupby() ) { + $realNameField = 'user_real_name'; + } else { + $realNameField = 'FIRST(user_real_name) AS user_real_name'; + } + + $tables = array( 'revision', 'user' ); + + $fields = array( + 'rev_user as user_id', + 'rev_user_text AS user_name', + $realNameField, + 'MAX(rev_timestamp) AS timestamp', + ); + + $conds = array( 'rev_page' => $this->getId() ); + + // The user who made the top revision gets credited as "this page was last edited by + // John, based on contributions by Tom, Dick and Harry", so don't include them twice. + $user = $this->getUser(); + if ( $user ) { + $conds[] = "rev_user != $user"; + } else { + $conds[] = "rev_user_text != {$dbr->addQuotes( $this->getUserText() )}"; + } + + $conds[] = "{$dbr->bitAnd( 'rev_deleted', Revision::DELETED_USER )} = 0"; // username hidden? + + $jconds = array( + 'user' => array( 'LEFT JOIN', 'rev_user = user_id' ), + ); + + $options = array( + 'GROUP BY' => array( 'rev_user', 'rev_user_text' ), + 'ORDER BY' => 'timestamp DESC', + ); + + $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $options, $jconds ); + return new UserArrayFromResult( $res ); + } + + /** + * Should the parser cache be used? + * + * @param $user User The relevant user + * @return boolean + */ + public function isParserCacheUsed( User $user, $oldid ) { + global $wgEnableParserCache; + + return $wgEnableParserCache + && $user->getStubThreshold() == 0 + && $this->exists() + && empty( $oldid ) + && !$this->mTitle->isCssOrJsPage() + && !$this->mTitle->isCssJsSubpage(); + } + + /** + * Perform the actions of a page purging + */ + public function doPurge() { + global $wgUseSquid; + + if( !wfRunHooks( 'ArticlePurge', array( &$this ) ) ){ + return false; + } + + // Invalidate the cache + $this->mTitle->invalidateCache(); + $this->clear(); + + if ( $wgUseSquid ) { + // Commit the transaction before the purge is sent + $dbw = wfGetDB( DB_MASTER ); + $dbw->commit(); + + // Send purge + $update = SquidUpdate::newSimplePurge( $this->mTitle ); + $update->doUpdate(); + } + + if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) { + if ( $this->getId() == 0 ) { + $text = false; + } else { + $text = $this->getRawText(); + } + + MessageCache::singleton()->replace( $this->mTitle->getDBkey(), $text ); + } + } + + /** + * Insert a new empty page record for this article. + * This *must* be followed up by creating a revision + * and running $this->updateRevisionOn( ... ); + * or else the record will be left in a funky state. + * Best if all done inside a transaction. + * + * @param $dbw DatabaseBase + * @return int The newly created page_id key, or false if the title already existed + * @private + */ + public function insertOn( $dbw ) { + wfProfileIn( __METHOD__ ); + + $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' ); + $dbw->insert( 'page', array( + 'page_id' => $page_id, + 'page_namespace' => $this->mTitle->getNamespace(), + 'page_title' => $this->mTitle->getDBkey(), + 'page_counter' => 0, + 'page_restrictions' => '', + 'page_is_redirect' => 0, # Will set this shortly... + 'page_is_new' => 1, + 'page_random' => wfRandom(), + 'page_touched' => $dbw->timestamp(), + 'page_latest' => 0, # Fill this in shortly... + 'page_len' => 0, # Fill this in shortly... + ), __METHOD__, 'IGNORE' ); + + $affected = $dbw->affectedRows(); + + if ( $affected ) { + $newid = $dbw->insertId(); + $this->mTitle->resetArticleID( $newid ); + } + wfProfileOut( __METHOD__ ); + + return $affected ? $newid : false; + } + + /** + * Update the page record to point to a newly saved revision. + * + * @param $dbw DatabaseBase: object + * @param $revision Revision: For ID number, and text used to set + length and redirect status fields + * @param $lastRevision Integer: if given, will not overwrite the page field + * when different from the currently set value. + * Giving 0 indicates the new page flag should be set + * on. + * @param $lastRevIsRedirect Boolean: if given, will optimize adding and + * removing rows in redirect table. + * @return bool true on success, false on failure + * @private + */ + public function updateRevisionOn( $dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) { + wfProfileIn( __METHOD__ ); + + $text = $revision->getText(); + $rt = Title::newFromRedirectRecurse( $text ); + + $conditions = array( 'page_id' => $this->getId() ); + + if ( !is_null( $lastRevision ) ) { + # An extra check against threads stepping on each other + $conditions['page_latest'] = $lastRevision; + } + + $now = wfTimestampNow(); + $dbw->update( 'page', + array( /* SET */ + 'page_latest' => $revision->getId(), + 'page_touched' => $dbw->timestamp( $now ), + 'page_is_new' => ( $lastRevision === 0 ) ? 1 : 0, + 'page_is_redirect' => $rt !== null ? 1 : 0, + 'page_len' => strlen( $text ), + ), + $conditions, + __METHOD__ ); + + $result = $dbw->affectedRows() != 0; + if ( $result ) { + $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect ); + $this->setCachedLastEditTime( $now ); + } + + wfProfileOut( __METHOD__ ); + return $result; + } + + /** + * Get the cached timestamp for the last time the page changed. + * This is only used to help handle slave lag by comparing to page_touched. + * @return string MW timestamp + */ + protected function getCachedLastEditTime() { + global $wgMemc; + $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) ); + return $wgMemc->get( $key ); + } + + /** + * Set the cached timestamp for the last time the page changed. + * This is only used to help handle slave lag by comparing to page_touched. + * @param $timestamp string + * @return void + */ + public function setCachedLastEditTime( $timestamp ) { + global $wgMemc; + $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) ); + $wgMemc->set( $key, wfTimestamp( TS_MW, $timestamp ), 60*15 ); + } + + /** + * Add row to the redirect table if this is a redirect, remove otherwise. + * + * @param $dbw DatabaseBase + * @param $redirectTitle Title object pointing to the redirect target, + * or NULL if this is not a redirect + * @param $lastRevIsRedirect If given, will optimize adding and + * removing rows in redirect table. + * @return bool true on success, false on failure + * @private + */ + public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) { + // Always update redirects (target link might have changed) + // Update/Insert if we don't know if the last revision was a redirect or not + // Delete if changing from redirect to non-redirect + $isRedirect = !is_null( $redirectTitle ); + + if ( !$isRedirect && !is_null( $lastRevIsRedirect ) && $lastRevIsRedirect === $isRedirect ) { + return true; + } + + wfProfileIn( __METHOD__ ); + if ( $isRedirect ) { + $this->insertRedirectEntry( $redirectTitle ); + } else { + // This is not a redirect, remove row from redirect table + $where = array( 'rd_from' => $this->getId() ); + $dbw->delete( 'redirect', $where, __METHOD__ ); + } + + if ( $this->getTitle()->getNamespace() == NS_FILE ) { + RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() ); + } + wfProfileOut( __METHOD__ ); + + return ( $dbw->affectedRows() != 0 ); + } + + /** + * If the given revision is newer than the currently set page_latest, + * update the page record. Otherwise, do nothing. + * + * @param $dbw Database object + * @param $revision Revision object + * @return mixed + */ + public function updateIfNewerOn( $dbw, $revision ) { + wfProfileIn( __METHOD__ ); + + $row = $dbw->selectRow( + array( 'revision', 'page' ), + array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ), + array( + 'page_id' => $this->getId(), + 'page_latest=rev_id' ), + __METHOD__ ); + + if ( $row ) { + if ( wfTimestamp( TS_MW, $row->rev_timestamp ) >= $revision->getTimestamp() ) { + wfProfileOut( __METHOD__ ); + return false; + } + $prev = $row->rev_id; + $lastRevIsRedirect = (bool)$row->page_is_redirect; + } else { + # No or missing previous revision; mark the page as new + $prev = 0; + $lastRevIsRedirect = null; + } + + $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect ); + + wfProfileOut( __METHOD__ ); + return $ret; + } + + /** + * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...) + * @param $text String: new text of the section + * @param $summary String: new section's subject, only if $section is 'new' + * @param $edittime String: revision timestamp or null to use the current revision + * @return string Complete article text, or null if error + */ + public function replaceSection( $section, $text, $summary = '', $edittime = null ) { + wfProfileIn( __METHOD__ ); + + if ( strval( $section ) == '' ) { + // Whole-page edit; let the whole text through + } else { + if ( is_null( $edittime ) ) { + $rev = Revision::newFromTitle( $this->mTitle ); + } else { + $dbw = wfGetDB( DB_MASTER ); + $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime ); + } + + if ( !$rev ) { + wfDebug( "WikiPage::replaceSection asked for bogus section (page: " . + $this->getId() . "; section: $section; edittime: $edittime)\n" ); + wfProfileOut( __METHOD__ ); + return null; + } + + $oldtext = $rev->getText(); + + if ( $section == 'new' ) { + # Inserting a new section + $subject = $summary ? wfMsgForContent( 'newsectionheaderdefaultlevel', $summary ) . "\n\n" : ''; + $text = strlen( trim( $oldtext ) ) > 0 + ? "{$oldtext}\n\n{$subject}{$text}" + : "{$subject}{$text}"; + } else { + # Replacing an existing section; roll out the big guns + global $wgParser; + + $text = $wgParser->replaceSection( $oldtext, $section, $text ); + } + } + + wfProfileOut( __METHOD__ ); + return $text; + } + + /** + * Check flags and add EDIT_NEW or EDIT_UPDATE to them as needed. + * @param $flags Int + * @return Int updated $flags + */ + function checkFlags( $flags ) { + if ( !( $flags & EDIT_NEW ) && !( $flags & EDIT_UPDATE ) ) { + if ( $this->mTitle->getArticleID() ) { + $flags |= EDIT_UPDATE; + } else { + $flags |= EDIT_NEW; + } + } + + return $flags; + } + + /** + * Change an existing article or create a new article. Updates RC and all necessary caches, + * optionally via the deferred update array. + * + * @param $text String: new text + * @param $summary String: edit summary + * @param $flags Integer bitfield: + * EDIT_NEW + * Article is known or assumed to be non-existent, create a new one + * EDIT_UPDATE + * Article is known or assumed to be pre-existing, update it + * EDIT_MINOR + * Mark this edit minor, if the user is allowed to do so + * EDIT_SUPPRESS_RC + * Do not log the change in recentchanges + * EDIT_FORCE_BOT + * Mark the edit a "bot" edit regardless of user rights + * EDIT_DEFER_UPDATES + * Defer some of the updates until the end of index.php + * EDIT_AUTOSUMMARY + * Fill in blank summaries with generated text where possible + * + * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected. + * If EDIT_UPDATE is specified and the article doesn't exist, the function will an + * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an + * edit-already-exists error will be returned. These two conditions are also possible with + * auto-detection due to MediaWiki's performance-optimised locking strategy. + * + * @param $baseRevId the revision ID this edit was based off, if any + * @param $user User the user doing the edit + * + * @return Status object. Possible errors: + * edit-hook-aborted: The ArticleSave hook aborted the edit but didn't set the fatal flag of $status + * edit-gone-missing: In update mode, but the article didn't exist + * edit-conflict: In update mode, the article changed unexpectedly + * edit-no-change: Warning that the text was the same as before + * edit-already-exists: In creation mode, but the article already exists + * + * Extensions may define additional errors. + * + * $return->value will contain an associative array with members as follows: + * new: Boolean indicating if the function attempted to create a new article + * revision: The revision object for the inserted revision, or null + * + * Compatibility note: this function previously returned a boolean value indicating success/failure + */ + public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) { + global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries; + + # Low-level sanity check + if ( $this->mTitle->getText() === '' ) { + throw new MWException( 'Something is trying to edit an article with an empty title' ); + } + + wfProfileIn( __METHOD__ ); + + $user = is_null( $user ) ? $wgUser : $user; + $status = Status::newGood( array() ); + + # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already + $this->loadPageData( 'fromdbmaster' ); + + $flags = $this->checkFlags( $flags ); + + if ( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary, + $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) ) + { + wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" ); + + if ( $status->isOK() ) { + $status->fatal( 'edit-hook-aborted' ); + } + + wfProfileOut( __METHOD__ ); + return $status; + } + + # Silently ignore EDIT_MINOR if not allowed + $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed( 'minoredit' ); + $bot = $flags & EDIT_FORCE_BOT; + + $oldtext = $this->getRawText(); // current revision + $oldsize = strlen( $oldtext ); + $oldcountable = $this->isCountable(); + + # Provide autosummaries if one is not provided and autosummaries are enabled. + if ( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) { + $summary = self::getAutosummary( $oldtext, $text, $flags ); + } + + $editInfo = $this->prepareTextForEdit( $text, null, $user ); + $text = $editInfo->pst; + $newsize = strlen( $text ); + + $dbw = wfGetDB( DB_MASTER ); + $now = wfTimestampNow(); + $this->mTimestamp = $now; + + if ( $flags & EDIT_UPDATE ) { + # Update article, but only if changed. + $status->value['new'] = false; + + # Make sure the revision is either completely inserted or not inserted at all + if ( !$wgDBtransactions ) { + $userAbort = ignore_user_abort( true ); + } + + $revision = new Revision( array( + 'page' => $this->getId(), + 'comment' => $summary, + 'minor_edit' => $isminor, + 'text' => $text, + 'parent_id' => $this->mLatest, + 'user' => $user->getId(), + 'user_text' => $user->getName(), + 'timestamp' => $now + ) ); + + $changed = ( strcmp( $text, $oldtext ) != 0 ); + + if ( $changed ) { + if ( !$this->mLatest ) { + # Article gone missing + wfDebug( __METHOD__ . ": EDIT_UPDATE specified but article doesn't exist\n" ); + $status->fatal( 'edit-gone-missing' ); + + wfProfileOut( __METHOD__ ); + return $status; + } + + $dbw->begin(); + $revisionId = $revision->insertOn( $dbw ); + + # Update page + # + # Note that we use $this->mLatest instead of fetching a value from the master DB + # during the course of this function. This makes sure that EditPage can detect + # edit conflicts reliably, either by $ok here, or by $article->getTimestamp() + # before this function is called. A previous function used a separate query, this + # creates a window where concurrent edits can cause an ignored edit conflict. + $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest ); + + if ( !$ok ) { + /* Belated edit conflict! Run away!! */ + $status->fatal( 'edit-conflict' ); + + # Delete the invalid revision if the DB is not transactional + if ( !$wgDBtransactions ) { + $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ ); + } + + $revisionId = 0; + $dbw->rollback(); + } else { + global $wgUseRCPatrol; + wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId, $user ) ); + # Update recentchanges + if ( !( $flags & EDIT_SUPPRESS_RC ) ) { + # Mark as patrolled if the user can do so + $patrolled = $wgUseRCPatrol && !count( + $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) ); + # Add RC row to the DB + $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary, + $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize, + $revisionId, $patrolled + ); + + # Log auto-patrolled edits + if ( $patrolled ) { + PatrolLog::record( $rc, true ); + } + } + $user->incEditCount(); + $dbw->commit(); + } + } + + if ( !$wgDBtransactions ) { + ignore_user_abort( $userAbort ); + } + + // Now that ignore_user_abort is restored, we can respond to fatal errors + if ( !$status->isOK() ) { + wfProfileOut( __METHOD__ ); + return $status; + } + + # Update links tables, site stats, etc. + $this->doEditUpdates( $revision, $user, array( 'changed' => $changed, + 'oldcountable' => $oldcountable ) ); + + if ( !$changed ) { + $status->warning( 'edit-no-change' ); + $revision = null; + // Keep the same revision ID, but do some updates on it + $revisionId = $this->getLatest(); + // Update page_touched, this is usually implicit in the page update + // Other cache updates are done in onArticleEdit() + $this->mTitle->invalidateCache(); + } + } else { + # Create new article + $status->value['new'] = true; + + $dbw->begin(); + + # Add the page record; stake our claim on this title! + # This will return false if the article already exists + $newid = $this->insertOn( $dbw ); + + if ( $newid === false ) { + $dbw->rollback(); + $status->fatal( 'edit-already-exists' ); + + wfProfileOut( __METHOD__ ); + return $status; + } + + # Save the revision text... + $revision = new Revision( array( + 'page' => $newid, + 'comment' => $summary, + 'minor_edit' => $isminor, + 'text' => $text, + 'user' => $user->getId(), + 'user_text' => $user->getName(), + 'timestamp' => $now + ) ); + $revisionId = $revision->insertOn( $dbw ); + + $this->mTitle->resetArticleID( $newid ); + # Update the LinkCache. Resetting the Title ArticleID means it will rely on having that already cached + # @todo FIXME? + LinkCache::singleton()->addGoodLinkObj( $newid, $this->mTitle, strlen( $text ), (bool)Title::newFromRedirect( $text ), $revisionId ); + + # Update the page record with revision data + $this->updateRevisionOn( $dbw, $revision, 0 ); + + wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) ); + + # Update recentchanges + if ( !( $flags & EDIT_SUPPRESS_RC ) ) { + global $wgUseRCPatrol, $wgUseNPPatrol; + + # Mark as patrolled if the user can do so + $patrolled = ( $wgUseRCPatrol || $wgUseNPPatrol ) && !count( + $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) ); + # Add RC row to the DB + $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot, + '', strlen( $text ), $revisionId, $patrolled ); + + # Log auto-patrolled edits + if ( $patrolled ) { + PatrolLog::record( $rc, true ); + } + } + $user->incEditCount(); + $dbw->commit(); + + # Update links, etc. + $this->doEditUpdates( $revision, $user, array( 'created' => true ) ); + + wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary, + $flags & EDIT_MINOR, null, null, &$flags, $revision ) ); + } + + # Do updates right now unless deferral was requested + if ( !( $flags & EDIT_DEFER_UPDATES ) ) { + wfDoUpdates(); + } + + // Return the new revision (or null) to the caller + $status->value['revision'] = $revision; + + wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary, + $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status, $baseRevId ) ); + + # Promote user to any groups they meet the criteria for + $user->addAutopromoteOnceGroups( 'onEdit' ); + + wfProfileOut( __METHOD__ ); + return $status; + } + + /** + * Update the article's restriction field, and leave a log entry. + * + * @param $limit Array: set of restriction keys + * @param $reason String + * @param &$cascade Integer. Set to false if cascading protection isn't allowed. + * @param $expiry Array: per restriction type expiration + * @param $user User The user updating the restrictions + * @return bool true on success + */ + public function updateRestrictions( + $limit = array(), $reason = '', &$cascade = 0, $expiry = array(), User $user = null + ) { + global $wgUser, $wgContLang; + $user = is_null( $user ) ? $wgUser : $user; + + $restrictionTypes = $this->mTitle->getRestrictionTypes(); + + $id = $this->mTitle->getArticleID(); + + if ( $id <= 0 ) { + wfDebug( "updateRestrictions failed: article id $id <= 0\n" ); + return false; + } + + if ( wfReadOnly() ) { + wfDebug( "updateRestrictions failed: read-only\n" ); + return false; + } + + if ( count( $this->mTitle->getUserPermissionsErrors( 'protect', $user ) ) ) { + wfDebug( "updateRestrictions failed: insufficient permissions\n" ); + return false; + } + + if ( !$cascade ) { + $cascade = false; + } + + // Take this opportunity to purge out expired restrictions + Title::purgeExpiredRestrictions(); + + # @todo FIXME: Same limitations as described in ProtectionForm.php (line 37); + # we expect a single selection, but the schema allows otherwise. + $current = array(); + $updated = self::flattenRestrictions( $limit ); + $changed = false; + + foreach ( $restrictionTypes as $action ) { + if ( isset( $expiry[$action] ) ) { + # Get current restrictions on $action + $aLimits = $this->mTitle->getRestrictions( $action ); + $current[$action] = implode( '', $aLimits ); + # Are any actual restrictions being dealt with here? + $aRChanged = count( $aLimits ) || !empty( $limit[$action] ); + + # If something changed, we need to log it. Checking $aRChanged + # assures that "unprotecting" a page that is not protected does + # not log just because the expiry was "changed". + if ( $aRChanged && + $this->mTitle->getRestrictionExpiry( $action ) != $expiry[$action] ) + { + $changed = true; + } + } + } + + $current = self::flattenRestrictions( $current ); + + $changed = ( $changed || $current != $updated ); + $changed = $changed || ( $updated && $this->mTitle->areRestrictionsCascading() != $cascade ); + $protect = ( $updated != '' ); + + # If nothing's changed, do nothing + if ( $changed ) { + if ( wfRunHooks( 'ArticleProtect', array( &$this, &$user, $limit, $reason ) ) ) { + $dbw = wfGetDB( DB_MASTER ); + + # Prepare a null revision to be added to the history + $modified = $current != '' && $protect; + + if ( $protect ) { + $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle'; + } else { + $comment_type = 'unprotectedarticle'; + } + + $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) ); + + # Only restrictions with the 'protect' right can cascade... + # Otherwise, people who cannot normally protect can "protect" pages via transclusion + $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' ); + + # The schema allows multiple restrictions + if ( !in_array( 'protect', $editrestriction ) && !in_array( 'sysop', $editrestriction ) ) { + $cascade = false; + } + + $cascade_description = ''; + + if ( $cascade ) { + $cascade_description = ' [' . wfMsgForContent( 'protect-summary-cascade' ) . ']'; + } + + if ( $reason ) { + $comment .= ": $reason"; + } + + $editComment = $comment; + $encodedExpiry = array(); + $protect_description = ''; + foreach ( $limit as $action => $restrictions ) { + if ( !isset( $expiry[$action] ) ) + $expiry[$action] = $dbw->getInfinity(); + + $encodedExpiry[$action] = $dbw->encodeExpiry( $expiry[$action] ); + if ( $restrictions != '' ) { + $protect_description .= "[$action=$restrictions] ("; + if ( $encodedExpiry[$action] != 'infinity' ) { + $protect_description .= wfMsgForContent( 'protect-expiring', + $wgContLang->timeanddate( $expiry[$action], false, false ) , + $wgContLang->date( $expiry[$action], false, false ) , + $wgContLang->time( $expiry[$action], false, false ) ); + } else { + $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' ); + } + + $protect_description .= ') '; + } + } + $protect_description = trim( $protect_description ); + + if ( $protect_description && $protect ) { + $editComment .= " ($protect_description)"; + } + + if ( $cascade ) { + $editComment .= "$cascade_description"; + } + + # Update restrictions table + foreach ( $limit as $action => $restrictions ) { + if ( $restrictions != '' ) { + $dbw->replace( 'page_restrictions', array( array( 'pr_page', 'pr_type' ) ), + array( 'pr_page' => $id, + 'pr_type' => $action, + 'pr_level' => $restrictions, + 'pr_cascade' => ( $cascade && $action == 'edit' ) ? 1 : 0, + 'pr_expiry' => $encodedExpiry[$action] + ), + __METHOD__ + ); + } else { + $dbw->delete( 'page_restrictions', array( 'pr_page' => $id, + 'pr_type' => $action ), __METHOD__ ); + } + } + + # Insert a null revision + $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true ); + $nullRevId = $nullRevision->insertOn( $dbw ); + + $latest = $this->getLatest(); + # Update page record + $dbw->update( 'page', + array( /* SET */ + 'page_touched' => $dbw->timestamp(), + 'page_restrictions' => '', + 'page_latest' => $nullRevId + ), array( /* WHERE */ + 'page_id' => $id + ), __METHOD__ + ); + + wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $nullRevision, $latest, $user ) ); + wfRunHooks( 'ArticleProtectComplete', array( &$this, &$user, $limit, $reason ) ); + + # Update the protection log + $log = new LogPage( 'protect' ); + if ( $protect ) { + $params = array( $protect_description, $cascade ? 'cascade' : '' ); + $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason ), $params ); + } else { + $log->addEntry( 'unprotect', $this->mTitle, $reason ); + } + } # End hook + } # End "changed" check + + return true; + } + + /** + * Take an array of page restrictions and flatten it to a string + * suitable for insertion into the page_restrictions field. + * @param $limit Array + * @return String + */ + protected static function flattenRestrictions( $limit ) { + if ( !is_array( $limit ) ) { + throw new MWException( 'WikiPage::flattenRestrictions given non-array restriction set' ); + } + + $bits = array(); + ksort( $limit ); + + foreach ( $limit as $action => $restrictions ) { + if ( $restrictions != '' ) { + $bits[] = "$action=$restrictions"; + } + } + + return implode( ':', $bits ); + } + + /** + * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions + */ + public function isBigDeletion() { + global $wgDeleteRevisionsLimit; + + if ( $wgDeleteRevisionsLimit ) { + $revCount = $this->estimateRevisionCount(); + + return $revCount > $wgDeleteRevisionsLimit; + } + + return false; + } + + /** + * @return int approximate revision count + */ + public function estimateRevisionCount() { + $dbr = wfGetDB( DB_SLAVE ); + + // For an exact count... + // return $dbr->selectField( 'revision', 'COUNT(*)', + // array( 'rev_page' => $this->getId() ), __METHOD__ ); + return $dbr->estimateRowCount( 'revision', '*', + array( 'rev_page' => $this->getId() ), __METHOD__ ); + } + + /** + * Get the last N authors + * @param $num Integer: number of revisions to get + * @param $revLatest String: the latest rev_id, selected from the master (optional) + * @return array Array of authors, duplicates not removed + */ + public function getLastNAuthors( $num, $revLatest = 0 ) { + wfProfileIn( __METHOD__ ); + // First try the slave + // If that doesn't have the latest revision, try the master + $continue = 2; + $db = wfGetDB( DB_SLAVE ); + + do { + $res = $db->select( array( 'page', 'revision' ), + array( 'rev_id', 'rev_user_text' ), + array( + 'page_namespace' => $this->mTitle->getNamespace(), + 'page_title' => $this->mTitle->getDBkey(), + 'rev_page = page_id' + ), __METHOD__, + array( + 'ORDER BY' => 'rev_timestamp DESC', + 'LIMIT' => $num + ) + ); + + if ( !$res ) { + wfProfileOut( __METHOD__ ); + return array(); + } + + $row = $db->fetchObject( $res ); + + if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) { + $db = wfGetDB( DB_MASTER ); + $continue--; + } else { + $continue = 0; + } + } while ( $continue ); + + $authors = array( $row->rev_user_text ); + + foreach ( $res as $row ) { + $authors[] = $row->rev_user_text; + } + + wfProfileOut( __METHOD__ ); + return $authors; + } + + /** + * Back-end article deletion + * Deletes the article with database consistency, writes logs, purges caches + * + * @param $reason string delete reason for deletion log + * @param suppress bitfield + * Revision::DELETED_TEXT + * Revision::DELETED_COMMENT + * Revision::DELETED_USER + * Revision::DELETED_RESTRICTED + * @param $id int article ID + * @param $commit boolean defaults to true, triggers transaction end + * @param &$errors Array of errors to append to + * @param $user User The relevant user + * @return boolean true if successful + */ + public function doDeleteArticle( + $reason, $suppress = false, $id = 0, $commit = true, &$error = '', User $user = null + ) { + global $wgDeferredUpdateList, $wgUseTrackbacks, $wgUser; + $user = is_null( $user ) ? $wgUser : $user; + + wfDebug( __METHOD__ . "\n" ); + + if ( ! wfRunHooks( 'ArticleDelete', array( &$this, &$user, &$reason, &$error ) ) ) { + return false; + } + $dbw = wfGetDB( DB_MASTER ); + $t = $this->mTitle->getDBkey(); + $id = $id ? $id : $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE ); + + if ( $t === '' || $id == 0 ) { + return false; + } + + $u = new SiteStatsUpdate( 0, 1, - (int)$this->isCountable(), -1 ); + array_push( $wgDeferredUpdateList, $u ); + + // Bitfields to further suppress the content + if ( $suppress ) { + $bitfield = 0; + // This should be 15... + $bitfield |= Revision::DELETED_TEXT; + $bitfield |= Revision::DELETED_COMMENT; + $bitfield |= Revision::DELETED_USER; + $bitfield |= Revision::DELETED_RESTRICTED; + } else { + $bitfield = 'rev_deleted'; + } + + $dbw->begin(); + // For now, shunt the revision data into the archive table. + // Text is *not* removed from the text table; bulk storage + // is left intact to avoid breaking block-compression or + // immutable storage schemes. + // + // For backwards compatibility, note that some older archive + // table entries will have ar_text and ar_flags fields still. + // + // In the future, we may keep revisions and mark them with + // the rev_deleted field, which is reserved for this purpose. + $dbw->insertSelect( 'archive', array( 'page', 'revision' ), + array( + 'ar_namespace' => 'page_namespace', + 'ar_title' => 'page_title', + 'ar_comment' => 'rev_comment', + 'ar_user' => 'rev_user', + 'ar_user_text' => 'rev_user_text', + 'ar_timestamp' => 'rev_timestamp', + 'ar_minor_edit' => 'rev_minor_edit', + 'ar_rev_id' => 'rev_id', + 'ar_text_id' => 'rev_text_id', + 'ar_text' => '\'\'', // Be explicit to appease + 'ar_flags' => '\'\'', // MySQL's "strict mode"... + 'ar_len' => 'rev_len', + 'ar_page_id' => 'page_id', + 'ar_deleted' => $bitfield + ), array( + 'page_id' => $id, + 'page_id = rev_page' + ), __METHOD__ + ); + + # Delete restrictions for it + $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ ); + + # Now that it's safely backed up, delete it + $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__ ); + $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy + + if ( !$ok ) { + $dbw->rollback(); + return false; + } + + # Fix category table counts + $cats = array(); + $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ ); + + foreach ( $res as $row ) { + $cats [] = $row->cl_to; + } + + $this->updateCategoryCounts( array(), $cats ); + + # If using cascading deletes, we can skip some explicit deletes + if ( !$dbw->cascadingDeletes() ) { + $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ ); + + if ( $wgUseTrackbacks ) + $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ ); + + # Delete outgoing links + $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) ); + $dbw->delete( 'imagelinks', array( 'il_from' => $id ) ); + $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) ); + $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) ); + $dbw->delete( 'externallinks', array( 'el_from' => $id ) ); + $dbw->delete( 'langlinks', array( 'll_from' => $id ) ); + $dbw->delete( 'iwlinks', array( 'iwl_from' => $id ) ); + $dbw->delete( 'redirect', array( 'rd_from' => $id ) ); + } + + # If using cleanup triggers, we can skip some manual deletes + if ( !$dbw->cleanupTriggers() ) { + # Clean up recentchanges entries... + $dbw->delete( 'recentchanges', + array( 'rc_type != ' . RC_LOG, + 'rc_namespace' => $this->mTitle->getNamespace(), + 'rc_title' => $this->mTitle->getDBkey() ), + __METHOD__ ); + $dbw->delete( 'recentchanges', + array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ), + __METHOD__ ); + } + + # Clear caches + self::onArticleDelete( $this->mTitle ); + + # Clear the cached article id so the interface doesn't act like we exist + $this->mTitle->resetArticleID( 0 ); + + # Log the deletion, if the page was suppressed, log it at Oversight instead + $logtype = $suppress ? 'suppress' : 'delete'; + $log = new LogPage( $logtype ); + + # Make sure logging got through + $log->addEntry( 'delete', $this->mTitle, $reason, array() ); + + if ( $commit ) { + $dbw->commit(); + } + + wfRunHooks( 'ArticleDeleteComplete', array( &$this, &$user, $reason, $id ) ); + return true; + } + + /** + * Roll back the most recent consecutive set of edits to a page + * from the same user; fails if there are no eligible edits to + * roll back to, e.g. user is the sole contributor. This function + * performs permissions checks on $user, then calls commitRollback() + * to do the dirty work + * + * @param $fromP String: Name of the user whose edits to rollback. + * @param $summary String: Custom summary. Set to default summary if empty. + * @param $token String: Rollback token. + * @param $bot Boolean: If true, mark all reverted edits as bot. + * + * @param $resultDetails Array: contains result-specific array of additional values + * 'alreadyrolled' : 'current' (rev) + * success : 'summary' (str), 'current' (rev), 'target' (rev) + * + * @param $user User The user performing the rollback + * @return array of errors, each error formatted as + * array(messagekey, param1, param2, ...). + * On success, the array is empty. This array can also be passed to + * OutputPage::showPermissionsErrorPage(). + */ + public function doRollback( + $fromP, $summary, $token, $bot, &$resultDetails, User $user + ) { + $resultDetails = null; + + # Check permissions + $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user ); + $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $user ); + $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) ); + + if ( !$user->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) ) { + $errors[] = array( 'sessionfailure' ); + } + + if ( $user->pingLimiter( 'rollback' ) || $user->pingLimiter() ) { + $errors[] = array( 'actionthrottledtext' ); + } + + # If there were errors, bail out now + if ( !empty( $errors ) ) { + return $errors; + } + + return $this->commitRollback( $fromP, $summary, $bot, $resultDetails, $user ); + } + + /** + * Backend implementation of doRollback(), please refer there for parameter + * and return value documentation + * + * NOTE: This function does NOT check ANY permissions, it just commits the + * rollback to the DB Therefore, you should only call this function direct- + * ly if you want to use custom permissions checks. If you don't, use + * doRollback() instead. + * @param $fromP String: Name of the user whose edits to rollback. + * @param $summary String: Custom summary. Set to default summary if empty. + * @param $bot Boolean: If true, mark all reverted edits as bot. + * + * @param $resultDetails Array: contains result-specific array of additional values + * @param $guser User The user performing the rollback + */ + public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser ) { + global $wgUseRCPatrol, $wgContLang; + + $dbw = wfGetDB( DB_MASTER ); + + if ( wfReadOnly() ) { + return array( array( 'readonlytext' ) ); + } + + # Get the last editor + $current = Revision::newFromTitle( $this->mTitle ); + if ( is_null( $current ) ) { + # Something wrong... no page? + return array( array( 'notanarticle' ) ); + } + + $from = str_replace( '_', ' ', $fromP ); + # User name given should match up with the top revision. + # If the user was deleted then $from should be empty. + if ( $from != $current->getUserText() ) { + $resultDetails = array( 'current' => $current ); + return array( array( 'alreadyrolled', + htmlspecialchars( $this->mTitle->getPrefixedText() ), + htmlspecialchars( $fromP ), + htmlspecialchars( $current->getUserText() ) + ) ); + } + + # Get the last edit not by this guy... + # Note: these may not be public values + $user = intval( $current->getRawUser() ); + $user_text = $dbw->addQuotes( $current->getRawUserText() ); + $s = $dbw->selectRow( 'revision', + array( 'rev_id', 'rev_timestamp', 'rev_deleted' ), + array( 'rev_page' => $current->getPage(), + "rev_user != {$user} OR rev_user_text != {$user_text}" + ), __METHOD__, + array( 'USE INDEX' => 'page_timestamp', + 'ORDER BY' => 'rev_timestamp DESC' ) + ); + if ( $s === false ) { + # No one else ever edited this page + return array( array( 'cantrollback' ) ); + } elseif ( $s->rev_deleted & Revision::DELETED_TEXT || $s->rev_deleted & Revision::DELETED_USER ) { + # Only admins can see this text + return array( array( 'notvisiblerev' ) ); + } + + $set = array(); + if ( $bot && $guser->isAllowed( 'markbotedits' ) ) { + # Mark all reverted edits as bot + $set['rc_bot'] = 1; + } + + if ( $wgUseRCPatrol ) { + # Mark all reverted edits as patrolled + $set['rc_patrolled'] = 1; + } + + if ( count( $set ) ) { + $dbw->update( 'recentchanges', $set, + array( /* WHERE */ + 'rc_cur_id' => $current->getPage(), + 'rc_user_text' => $current->getUserText(), + "rc_timestamp > '{$s->rev_timestamp}'", + ), __METHOD__ + ); + } + + # Generate the edit summary if necessary + $target = Revision::newFromId( $s->rev_id ); + if ( empty( $summary ) ) { + if ( $from == '' ) { // no public user name + $summary = wfMsgForContent( 'revertpage-nouser' ); + } else { + $summary = wfMsgForContent( 'revertpage' ); + } + } + + # Allow the custom summary to use the same args as the default message + $args = array( + $target->getUserText(), $from, $s->rev_id, + $wgContLang->timeanddate( wfTimestamp( TS_MW, $s->rev_timestamp ) ), + $current->getId(), $wgContLang->timeanddate( $current->getTimestamp() ) + ); + $summary = wfMsgReplaceArgs( $summary, $args ); + + # Save + $flags = EDIT_UPDATE; + + if ( $guser->isAllowed( 'minoredit' ) ) { + $flags |= EDIT_MINOR; + } + + if ( $bot && ( $guser->isAllowedAny( 'markbotedits', 'bot' ) ) ) { + $flags |= EDIT_FORCE_BOT; + } + + # Actually store the edit + $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() ); + if ( !empty( $status->value['revision'] ) ) { + $revId = $status->value['revision']->getId(); + } else { + $revId = false; + } + + wfRunHooks( 'ArticleRollbackComplete', array( $this, $guser, $target, $current ) ); + + $resultDetails = array( + 'summary' => $summary, + 'current' => $current, + 'target' => $target, + 'newid' => $revId + ); + + return array(); + } + + /** + * Do standard deferred updates after page view + * @param $user User The relevant user + */ + public function doViewUpdates( User $user ) { + global $wgDeferredUpdateList, $wgDisableCounters; + if ( wfReadOnly() ) { + return; + } + + # Don't update page view counters on views from bot users (bug 14044) + if ( !$wgDisableCounters && !$user->isAllowed( 'bot' ) && $this->getId() ) { + $wgDeferredUpdateList[] = new ViewCountUpdate( $this->getId() ); + $wgDeferredUpdateList[] = new SiteStatsUpdate( 1, 0, 0 ); + } + + # Update newtalk / watchlist notification status + $user->clearNotification( $this->mTitle ); + } + + /** + * Prepare text which is about to be saved. + * Returns a stdclass with source, pst and output members + */ + public function prepareTextForEdit( $text, $revid = null, User $user = null ) { + global $wgParser, $wgUser; + $user = is_null( $user ) ? $wgUser : $user; + // @TODO fixme: check $user->getId() here??? + if ( $this->mPreparedEdit + && $this->mPreparedEdit->newText == $text + && $this->mPreparedEdit->revid == $revid + ) { + // Already prepared + return $this->mPreparedEdit; + } + + $popts = ParserOptions::newFromUser( $user ); + wfRunHooks( 'ArticlePrepareTextForEdit', array( $this, $popts ) ); + + $edit = (object)array(); + $edit->revid = $revid; + $edit->newText = $text; + $edit->pst = $this->preSaveTransform( $text, $user, $popts ); + $edit->popts = $this->getParserOptions( true ); + $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $edit->popts, true, true, $revid ); + $edit->oldText = $this->getRawText(); + + $this->mPreparedEdit = $edit; + + return $edit; + } + + /** + * Do standard deferred updates after page edit. + * Update links tables, site stats, search index and message cache. + * Purges pages that include this page if the text was changed here. + * Every 100th edit, prune the recent changes table. + * + * @private + * @param $revision Revision object + * @param $user User object that did the revision + * @param $options Array of options, following indexes are used: + * - changed: boolean, whether the revision changed the content (default true) + * - created: boolean, whether the revision created the page (default false) + * - oldcountable: boolean or null (default null): + * - boolean: whether the page was counted as an article before that + * revision, only used in changed is true and created is false + * - null: don't change the article count + */ + public function doEditUpdates( Revision $revision, User $user, array $options = array() ) { + global $wgDeferredUpdateList, $wgEnableParserCache; + + wfProfileIn( __METHOD__ ); + + $options += array( 'changed' => true, 'created' => false, 'oldcountable' => null ); + $text = $revision->getText(); + + # Parse the text + # Be careful not to double-PST: $text is usually already PST-ed once + if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) { + wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" ); + $editInfo = $this->prepareTextForEdit( $text, $revision->getId(), $user ); + } else { + wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" ); + $editInfo = $this->mPreparedEdit; + } + + # Save it to the parser cache + if ( $wgEnableParserCache ) { + $parserCache = ParserCache::singleton(); + $parserCache->save( $editInfo->output, $this, $editInfo->popts ); + } + + # Update the links tables + $u = new LinksUpdate( $this->mTitle, $editInfo->output ); + $u->doUpdate(); + + wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $options['changed'] ) ); + + if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) { + if ( 0 == mt_rand( 0, 99 ) ) { + // Flush old entries from the `recentchanges` table; we do this on + // random requests so as to avoid an increase in writes for no good reason + global $wgRCMaxAge; + + $dbw = wfGetDB( DB_MASTER ); + $cutoff = $dbw->timestamp( time() - $wgRCMaxAge ); + $dbw->delete( + 'recentchanges', + array( "rc_timestamp < '$cutoff'" ), + __METHOD__ + ); + } + } + + $id = $this->getId(); + $title = $this->mTitle->getPrefixedDBkey(); + $shortTitle = $this->mTitle->getDBkey(); + + if ( 0 == $id ) { + wfProfileOut( __METHOD__ ); + return; + } + + if ( !$options['changed'] ) { + $good = 0; + $total = 0; + } elseif ( $options['created'] ) { + $good = (int)$this->isCountable( $editInfo ); + $total = 1; + } elseif ( $options['oldcountable'] !== null ) { + $good = (int)$this->isCountable( $editInfo ) - (int)$options['oldcountable']; + $total = 0; + } else { + $good = 0; + $total = 0; + } + + $wgDeferredUpdateList[] = new SiteStatsUpdate( 0, 1, $good, $total ); + $wgDeferredUpdateList[] = new SearchUpdate( $id, $title, $text ); + + # If this is another user's talk page, update newtalk. + # Don't do this if $options['changed'] = false (null-edits) nor if + # it's a minor edit and the user doesn't want notifications for those. + if ( $options['changed'] + && $this->mTitle->getNamespace() == NS_USER_TALK + && $shortTitle != $user->getTitleKey() + && !( $revision->isMinor() && $user->isAllowed( 'nominornewtalk' ) ) + ) { + if ( wfRunHooks( 'ArticleEditUpdateNewTalk', array( &$this ) ) ) { + $other = User::newFromName( $shortTitle, false ); + if ( !$other ) { + wfDebug( __METHOD__ . ": invalid username\n" ); + } elseif ( User::isIP( $shortTitle ) ) { + // An anonymous user + $other->setNewtalk( true ); + } elseif ( $other->isLoggedIn() ) { + $other->setNewtalk( true ); + } else { + wfDebug( __METHOD__ . ": don't need to notify a nonexistent user\n" ); + } + } + } + + if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) { + MessageCache::singleton()->replace( $shortTitle, $text ); + } + + if( $options['created'] ) { + self::onArticleCreate( $this->mTitle ); + } else { + self::onArticleEdit( $this->mTitle ); + } + + wfProfileOut( __METHOD__ ); + } + + /** + * Perform article updates on a special page creation. + * + * @param $rev Revision object + * + * @todo This is a shitty interface function. Kill it and replace the + * other shitty functions like doEditUpdates and such so it's not needed + * anymore. + * @deprecated since 1.18, use doEditUpdates() + */ + public function createUpdates( $rev ) { + global $wgUser; + $this->doEditUpdates( $rev, $wgUser, array( 'created' => true ) ); + } + + /** + * This function is called right before saving the wikitext, + * so we can do things like signatures and links-in-context. + * + * @param $text String article contents + * @param $user User object: user doing the edit + * @param $popts ParserOptions object: parser options, default options for + * the user loaded if null given + * @return string article contents with altered wikitext markup (signatures + * converted, {{subst:}}, templates, etc.) + */ + public function preSaveTransform( $text, User $user = null, ParserOptions $popts = null ) { + global $wgParser, $wgUser; + $user = is_null( $user ) ? $wgUser : $user; + + if ( $popts === null ) { + $popts = ParserOptions::newFromUser( $user ); + } + + return $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts ); + } + + /** + * Loads page_touched and returns a value indicating if it should be used + * @return boolean true if not a redirect + */ + public function checkTouched() { + if ( !$this->mDataLoaded ) { + $this->loadPageData(); + } + return !$this->mIsRedirect; + } + + /** + * Get the page_touched field + * @return string containing GMT timestamp + */ + public function getTouched() { + if ( !$this->mDataLoaded ) { + $this->loadPageData(); + } + return $this->mTouched; + } + + /** + * Get the page_latest field + * @return integer rev_id of current revision + */ + public function getLatest() { + if ( !$this->mDataLoaded ) { + $this->loadPageData(); + } + return (int)$this->mLatest; + } + + /** + * Edit an article without doing all that other stuff + * The article must already exist; link tables etc + * are not updated, caches are not flushed. + * + * @param $text String: text submitted + * @param $user User The relevant user + * @param $comment String: comment submitted + * @param $minor Boolean: whereas it's a minor modification + */ + public function doQuickEdit( $text, User $user, $comment = '', $minor = 0 ) { + wfProfileIn( __METHOD__ ); + + $dbw = wfGetDB( DB_MASTER ); + $revision = new Revision( array( + 'page' => $this->getId(), + 'text' => $text, + 'comment' => $comment, + 'minor_edit' => $minor ? 1 : 0, + ) ); + $revision->insertOn( $dbw ); + $this->updateRevisionOn( $dbw, $revision ); + + wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) ); + + wfProfileOut( __METHOD__ ); + } + + /** + * The onArticle*() functions are supposed to be a kind of hooks + * which should be called whenever any of the specified actions + * are done. + * + * This is a good place to put code to clear caches, for instance. + * + * This is called on page move and undelete, as well as edit + * + * @param $title Title object + */ + public static function onArticleCreate( $title ) { + # Update existence markers on article/talk tabs... + if ( $title->isTalkPage() ) { + $other = $title->getSubjectPage(); + } else { + $other = $title->getTalkPage(); + } + + $other->invalidateCache(); + $other->purgeSquid(); + + $title->touchLinks(); + $title->purgeSquid(); + $title->deleteTitleProtection(); + } + + /** + * Clears caches when article is deleted + * + * @param $title Title + */ + public static function onArticleDelete( $title ) { + # Update existence markers on article/talk tabs... + if ( $title->isTalkPage() ) { + $other = $title->getSubjectPage(); + } else { + $other = $title->getTalkPage(); + } + + $other->invalidateCache(); + $other->purgeSquid(); + + $title->touchLinks(); + $title->purgeSquid(); + + # File cache + HTMLFileCache::clearFileCache( $title ); + + # Messages + if ( $title->getNamespace() == NS_MEDIAWIKI ) { + MessageCache::singleton()->replace( $title->getDBkey(), false ); + } + + # Images + if ( $title->getNamespace() == NS_FILE ) { + $update = new HTMLCacheUpdate( $title, 'imagelinks' ); + $update->doUpdate(); + } + + # User talk pages + if ( $title->getNamespace() == NS_USER_TALK ) { + $user = User::newFromName( $title->getText(), false ); + $user->setNewtalk( false ); + } + + # Image redirects + RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $title ); + } + + /** + * Purge caches on page update etc + * + * @param $title Title object + * @todo: verify that $title is always a Title object (and never false or null), add Title hint to parameter $title + */ + public static function onArticleEdit( $title ) { + global $wgDeferredUpdateList; + + // Invalidate caches of articles which include this page + $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' ); + + // Invalidate the caches of all pages which redirect here + $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' ); + + # Purge squid for this page only + $title->purgeSquid(); + + # Clear file cache for this page only + HTMLFileCache::clearFileCache( $title ); + } + + /**#@-*/ + + /** + * Return a list of templates used by this article. + * Uses the templatelinks table + * + * @return Array of Title objects + */ + public function getUsedTemplates() { + $result = array(); + $id = $this->mTitle->getArticleID(); + + if ( $id == 0 ) { + return array(); + } + + $dbr = wfGetDB( DB_SLAVE ); + $res = $dbr->select( array( 'templatelinks' ), + array( 'tl_namespace', 'tl_title' ), + array( 'tl_from' => $id ), + __METHOD__ ); + + if ( $res !== false ) { + foreach ( $res as $row ) { + $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title ); + } + } + + return $result; + } + + /** + * Returns a list of hidden categories this page is a member of. + * Uses the page_props and categorylinks tables. + * + * @return Array of Title objects + */ + public function getHiddenCategories() { + $result = array(); + $id = $this->mTitle->getArticleID(); + + if ( $id == 0 ) { + return array(); + } + + $dbr = wfGetDB( DB_SLAVE ); + $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ), + array( 'cl_to' ), + array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat', + 'page_namespace' => NS_CATEGORY, 'page_title=cl_to' ), + __METHOD__ ); + + if ( $res !== false ) { + foreach ( $res as $row ) { + $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to ); + } + } + + return $result; + } + + /** + * Return an applicable autosummary if one exists for the given edit. + * @param $oldtext String: the previous text of the page. + * @param $newtext String: The submitted text of the page. + * @param $flags Int bitmask: a bitmask of flags submitted for the edit. + * @return string An appropriate autosummary, or an empty string. + */ + public static function getAutosummary( $oldtext, $newtext, $flags ) { + global $wgContLang; + + # Decide what kind of autosummary is needed. + + # Redirect autosummaries + $ot = Title::newFromRedirect( $oldtext ); + $rt = Title::newFromRedirect( $newtext ); + + if ( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) { + $truncatedtext = $wgContLang->truncate( + str_replace( "\n", ' ', $newtext ), + max( 0, 250 + - strlen( wfMsgForContent( 'autoredircomment' ) ) + - strlen( $rt->getFullText() ) + ) ); + return wfMsgForContent( 'autoredircomment', $rt->getFullText(), $truncatedtext ); + } + + # New page autosummaries + if ( $flags & EDIT_NEW && strlen( $newtext ) ) { + # If they're making a new article, give its text, truncated, in the summary. + + $truncatedtext = $wgContLang->truncate( + str_replace( "\n", ' ', $newtext ), + max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ) ); + + return wfMsgForContent( 'autosumm-new', $truncatedtext ); + } + + # Blanking autosummaries + if ( $oldtext != '' && $newtext == '' ) { + return wfMsgForContent( 'autosumm-blank' ); + } elseif ( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500 ) { + # Removing more than 90% of the article + + $truncatedtext = $wgContLang->truncate( + $newtext, + max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ) ); + + return wfMsgForContent( 'autosumm-replace', $truncatedtext ); + } + + # If we reach this point, there's no applicable autosummary for our case, so our + # autosummary is empty. + return ''; + } + + /** + * Auto-generates a deletion reason + * + * @param &$hasHistory Boolean: whether the page has a history + * @return mixed String containing deletion reason or empty string, or boolean false + * if no revision occurred + */ + public function getAutoDeleteReason( &$hasHistory ) { + global $wgContLang; + + $dbw = wfGetDB( DB_MASTER ); + // Get the last revision + $rev = Revision::newFromTitle( $this->getTitle() ); + + if ( is_null( $rev ) ) { + return false; + } + + // Get the article's contents + $contents = $rev->getText(); + $blank = false; + + // If the page is blank, use the text from the previous revision, + // which can only be blank if there's a move/import/protect dummy revision involved + if ( $contents == '' ) { + $prev = $rev->getPrevious(); + + if ( $prev ) { + $contents = $prev->getText(); + $blank = true; + } + } + + // Find out if there was only one contributor + // Only scan the last 20 revisions + $res = $dbw->select( 'revision', 'rev_user_text', + array( 'rev_page' => $this->getID(), $dbw->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' ), + __METHOD__, + array( 'LIMIT' => 20 ) + ); + + if ( $res === false ) { + // This page has no revisions, which is very weird + return false; + } + + $hasHistory = ( $res->numRows() > 1 ); + $row = $dbw->fetchObject( $res ); + + if ( $row ) { // $row is false if the only contributor is hidden + $onlyAuthor = $row->rev_user_text; + // Try to find a second contributor + foreach ( $res as $row ) { + if ( $row->rev_user_text != $onlyAuthor ) { // Bug 22999 + $onlyAuthor = false; + break; + } + } + } else { + $onlyAuthor = false; + } + + // Generate the summary with a '$1' placeholder + if ( $blank ) { + // The current revision is blank and the one before is also + // blank. It's just not our lucky day + $reason = wfMsgForContent( 'exbeforeblank', '$1' ); + } else { + if ( $onlyAuthor ) { + $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor ); + } else { + $reason = wfMsgForContent( 'excontent', '$1' ); + } + } + + if ( $reason == '-' ) { + // Allow these UI messages to be blanked out cleanly + return ''; + } + + // Replace newlines with spaces to prevent uglyness + $contents = preg_replace( "/[\n\r]/", ' ', $contents ); + // Calculate the maximum amount of chars to get + // Max content length = max comment length - length of the comment (excl. $1) + $maxLength = 255 - ( strlen( $reason ) - 2 ); + $contents = $wgContLang->truncate( $contents, $maxLength ); + // Remove possible unfinished links + $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents ); + // Now replace the '$1' placeholder + $reason = str_replace( '$1', $contents, $reason ); + + return $reason; + } + + /** + * Get parser options suitable for rendering the primary article wikitext + * @param $canonical boolean Determines that the generated options must not depend on user preferences (see bug 14404) + * @return mixed ParserOptions object or boolean false + */ + public function getParserOptions( $canonical = false ) { + global $wgUser, $wgLanguageCode; + + if ( !$this->mParserOptions || $canonical ) { + $user = !$canonical ? $wgUser : new User; + $parserOptions = new ParserOptions( $user ); + $parserOptions->setTidy( true ); + $parserOptions->enableLimitReport(); + + if ( $canonical ) { + $parserOptions->setUserLang( $wgLanguageCode ); # Must be set explicitely + return $parserOptions; + } + $this->mParserOptions = $parserOptions; + } + // Clone to allow modifications of the return value without affecting cache + return clone $this->mParserOptions; + } + + /** + * Get parser options suitable for rendering the primary article wikitext + * @param User $user + * @return ParserOptions + */ + public function makeParserOptions( User $user ) { + $options = ParserOptions::newFromUser( $user ); + $options->enableLimitReport(); // show inclusion/loop reports + $options->setTidy( true ); // fix bad HTML + return $options; + } + + /** + * Update all the appropriate counts in the category table, given that + * we've added the categories $added and deleted the categories $deleted. + * + * @param $added array The names of categories that were added + * @param $deleted array The names of categories that were deleted + */ + public function updateCategoryCounts( $added, $deleted ) { + $ns = $this->mTitle->getNamespace(); + $dbw = wfGetDB( DB_MASTER ); + + # First make sure the rows exist. If one of the "deleted" ones didn't + # exist, we might legitimately not create it, but it's simpler to just + # create it and then give it a negative value, since the value is bogus + # anyway. + # + # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE. + $insertCats = array_merge( $added, $deleted ); + if ( !$insertCats ) { + # Okay, nothing to do + return; + } + + $insertRows = array(); + + foreach ( $insertCats as $cat ) { + $insertRows[] = array( + 'cat_id' => $dbw->nextSequenceValue( 'category_cat_id_seq' ), + 'cat_title' => $cat + ); + } + $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' ); + + $addFields = array( 'cat_pages = cat_pages + 1' ); + $removeFields = array( 'cat_pages = cat_pages - 1' ); + + if ( $ns == NS_CATEGORY ) { + $addFields[] = 'cat_subcats = cat_subcats + 1'; + $removeFields[] = 'cat_subcats = cat_subcats - 1'; + } elseif ( $ns == NS_FILE ) { + $addFields[] = 'cat_files = cat_files + 1'; + $removeFields[] = 'cat_files = cat_files - 1'; + } + + if ( $added ) { + $dbw->update( + 'category', + $addFields, + array( 'cat_title' => $added ), + __METHOD__ + ); + } + + if ( $deleted ) { + $dbw->update( + 'category', + $removeFields, + array( 'cat_title' => $deleted ), + __METHOD__ + ); + } + } + + /** + * Updates cascading protections + * + * @param $parserOutput ParserOutput object for the current version + **/ + public function doCascadeProtectionUpdates( ParserOutput $parserOutput ) { + if ( wfReadOnly() || !$this->mTitle->areRestrictionsCascading() ) { + return; + } + + // templatelinks table may have become out of sync, + // especially if using variable-based transclusions. + // For paranoia, check if things have changed and if + // so apply updates to the database. This will ensure + // that cascaded protections apply as soon as the changes + // are visible. + + # Get templates from templatelinks + $id = $this->mTitle->getArticleID(); + + $tlTemplates = array(); + + $dbr = wfGetDB( DB_SLAVE ); + $res = $dbr->select( array( 'templatelinks' ), + array( 'tl_namespace', 'tl_title' ), + array( 'tl_from' => $id ), + __METHOD__ + ); + + foreach ( $res as $row ) { + $tlTemplates["{$row->tl_namespace}:{$row->tl_title}"] = true; + } + + # Get templates from parser output. + $poTemplates = array(); + foreach ( $parserOutput->getTemplates() as $ns => $templates ) { + foreach ( $templates as $dbk => $id ) { + $poTemplates["$ns:$dbk"] = true; + } + } + + # Get the diff + $templates_diff = array_diff_key( $poTemplates, $tlTemplates ); + + if ( count( $templates_diff ) > 0 ) { + # Whee, link updates time. + $u = new LinksUpdate( $this->mTitle, $parserOutput, false ); + $u->doUpdate(); + } + } + + /* + * @deprecated since 1.18 + */ + public function quickEdit( $text, $comment = '', $minor = 0 ) { + global $wgUser; + return $this->doQuickEdit( $text, $wgUser, $comment, $minor ); + } + + /* + * @deprecated since 1.18 + */ + public function viewUpdates() { + global $wgUser; + return $this->doViewUpdates( $wgUser ); + } + + /* + * @deprecated since 1.18 + */ + public function useParserCache( $oldid ) { + global $wgUser; + return $this->isParserCacheUsed( $wgUser, $oldid ); + } +} -- cgit v1.2.2