Merge "Fixing dry-run logic in updateCollation.php"
[lhc/web/wiklou.git] / includes / page / WikiPage.php
index bded84d..e1d9f99 100644 (file)
@@ -90,6 +90,14 @@ class WikiPage implements Page, IDBAccessObject {
                $this->mTitle = $title;
        }
 
+       /**
+        * Makes sure that the mTitle object is cloned
+        * to the newly cloned WikiPage.
+        */
+       public function __clone() {
+               $this->mTitle = clone $this->mTitle;
+       }
+
        /**
         * Create a WikiPage object of the appropriate class for the given title.
         *
@@ -496,13 +504,13 @@ class WikiPage implements Page, IDBAccessObject {
 
        /**
         * Loads page_touched and returns a value indicating if it should be used
-        * @return bool True if not a redirect
+        * @return bool True if this page exists and is not a redirect
         */
        public function checkTouched() {
                if ( !$this->mDataLoaded ) {
                        $this->loadPageData();
                }
-               return !$this->mIsRedirect;
+               return ( $this->mId && !$this->mIsRedirect );
        }
 
        /**
@@ -887,9 +895,13 @@ class WikiPage implements Page, IDBAccessObject {
                // Update the DB post-send if the page has not cached since now
                $that = $this;
                $latest = $this->getLatest();
-               DeferredUpdates::addCallableUpdate( function() use ( $that, $retval, $latest ) {
-                       $that->insertRedirectEntry( $retval, $latest );
-               } );
+               DeferredUpdates::addCallableUpdate(
+                       function () use ( $that, $retval, $latest ) {
+                               $that->insertRedirectEntry( $retval, $latest );
+                       },
+                       DeferredUpdates::POSTSEND,
+                       wfGetDB( DB_MASTER )
+               );
 
                return $retval;
        }
@@ -1048,9 +1060,9 @@ class WikiPage implements Page, IDBAccessObject {
         * @param bool          $forceParse Force reindexing, regardless of cache settings
         * @return bool|ParserOutput ParserOutput or false if the revision was not found
         */
-       public function getParserOutput( ParserOptions $parserOptions, $oldid = null,
-                                        $forceParse = false ) {
-
+       public function getParserOutput(
+               ParserOptions $parserOptions, $oldid = null, $forceParse = false
+       ) {
                $useParserCache =
                        ( !$forceParse ) && $this->shouldCheckParserCache( $parserOptions, $oldid );
                wfDebug( __METHOD__ .
@@ -1144,7 +1156,9 @@ class WikiPage implements Page, IDBAccessObject {
         * @param IDatabase $dbw
         * @param int|null $pageId Custom page ID that will be used for the insert statement
         *
-        * @return bool|int The newly created page_id key; false if the title already existed
+        * @return bool|int The newly created page_id key; false if the row was not
+        *   inserted, e.g. because the title already existed or because the specified
+        *   page ID is already in use.
         */
        public function insertOn( $dbw, $pageId = null ) {
                $pageIdForInsert = $pageId ?: $dbw->nextSequenceValue( 'page_page_id_seq' );
@@ -1756,7 +1770,6 @@ class WikiPage implements Page, IDBAccessObject {
                        $revisionId = $revision->insertOn( $dbw );
                        // Update page_latest and friends to reflect the new revision
                        if ( !$this->updateRevisionOn( $dbw, $revision, null, $meta['oldIsRedirect'] ) ) {
-                               $dbw->rollback( __METHOD__ ); // sanity; this should never happen
                                throw new MWException( "Failed to update page row to use new revision." );
                        }
 
@@ -1906,7 +1919,6 @@ class WikiPage implements Page, IDBAccessObject {
                $revisionId = $revision->insertOn( $dbw );
                // Update the page record with revision data
                if ( !$this->updateRevisionOn( $dbw, $revision, 0 ) ) {
-                       $dbw->rollback( __METHOD__ ); // sanity; this should never happen
                        throw new MWException( "Failed to update page row to use new revision." );
                }
 
@@ -2861,13 +2873,24 @@ class WikiPage implements Page, IDBAccessObject {
                        return $status;
                }
 
+               // Given the lock above, we can be confident in the title and page ID values
+               $namespace = $this->getTitle()->getNamespace();
+               $dbKey = $this->getTitle()->getDBkey();
+
                // At this point we are now comitted to returning an OK
                // status unless some DB query error or other exception comes up.
                // This way callers don't have to call rollback() if $status is bad
                // unless they actually try to catch exceptions (which is rare).
 
                // we need to remember the old content so we can use it to generate all deletion updates.
-               $content = $this->getContent( Revision::RAW );
+               try {
+                       $content = $this->getContent( Revision::RAW );
+               } catch ( Exception $ex ) {
+                       wfLogWarning( __METHOD__ . ': failed to load content during deletion! '
+                               . $ex->getMessage() );
+
+                       $content = null;
+               }
 
                // Bitfields to further suppress the content
                if ( $suppress ) {
@@ -2881,57 +2904,58 @@ class WikiPage implements Page, IDBAccessObject {
                        $bitfield = 'rev_deleted';
                }
 
-               /**
-                * 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.
-                */
-
-               $row = [
-                       '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_parent_id'  => 'rev_parent_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,
-                       'ar_sha1'       => 'rev_sha1',
-               ];
+               // 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.
+               // In the future, we may keep revisions and mark them with
+               // the rev_deleted field, which is reserved for this purpose.
 
-               if ( $wgContentHandlerUseDB ) {
-                       $row['ar_content_model'] = 'rev_content_model';
-                       $row['ar_content_format'] = 'rev_content_format';
-               }
-
-               // Copy all the page revisions into the archive table
-               $dbw->insertSelect(
-                       'archive',
-                       [ 'page', 'revision' ],
-                       $row,
-                       [
-                               'page_id' => $id,
-                               'page_id = rev_page'
-                       ],
-                       __METHOD__
+               // Get all of the page revisions
+               $res = $dbw->select(
+                       'revision',
+                       Revision::selectFields(),
+                       [ 'rev_page' => $id ],
+                       __METHOD__,
+                       'FOR UPDATE'
                );
+               // Build their equivalent archive rows
+               $rowsInsert = [];
+               foreach ( $res as $row ) {
+                       $rowInsert = [
+                               'ar_namespace'  => $namespace,
+                               'ar_title'      => $dbKey,
+                               'ar_comment'    => $row->rev_comment,
+                               'ar_user'       => $row->rev_user,
+                               'ar_user_text'  => $row->rev_user_text,
+                               'ar_timestamp'  => $row->rev_timestamp,
+                               'ar_minor_edit' => $row->rev_minor_edit,
+                               'ar_rev_id'     => $row->rev_id,
+                               'ar_parent_id'  => $row->rev_parent_id,
+                               'ar_text_id'    => $row->rev_text_id,
+                               'ar_text'       => '',
+                               'ar_flags'      => '',
+                               'ar_len'        => $row->rev_len,
+                               'ar_page_id'    => $id,
+                               'ar_deleted'    => $bitfield,
+                               'ar_sha1'       => $row->rev_sha1,
+                       ];
+                       if ( $wgContentHandlerUseDB ) {
+                               $rowInsert['ar_content_model'] = $row->rev_content_model;
+                               $rowInsert['ar_content_format'] = $row->rev_content_format;
+                       }
+                       $rowsInsert[] = $rowInsert;
+               }
+               // Copy them into the archive table
+               $dbw->insert( 'archive', $rowsInsert, __METHOD__ );
                // Save this so we can pass it to the ArticleDeleteComplete hook.
                $archivedRevisionCount = $dbw->affectedRows();
 
+               // Clone the title and wikiPage, so we have the information we need when
+               // we log and run the ArticleDeleteComplete hook.
+               $logTitle = clone $this->mTitle;
+               $wikiPageBeforeDelete = clone $this;
+
                // Now that it's safely backed up, delete it
                $dbw->delete( 'page', [ 'page_id' => $id ], __METHOD__ );
 
@@ -2939,9 +2963,6 @@ class WikiPage implements Page, IDBAccessObject {
                        $dbw->delete( 'revision', [ 'rev_page' => $id ], __METHOD__ );
                }
 
-               // Clone the title, so we have the information we need when we log
-               $logTitle = clone $this->mTitle;
-
                // Log the deletion, if the page was suppressed, put it in the suppression log instead
                $logtype = $suppress ? 'suppress' : 'delete';
 
@@ -2960,8 +2981,15 @@ class WikiPage implements Page, IDBAccessObject {
 
                $this->doDeleteUpdates( $id, $content );
 
-               Hooks::run( 'ArticleDeleteComplete',
-                       [ &$this, &$user, $reason, $id, $content, $logEntry, $archivedRevisionCount ] );
+               Hooks::run( 'ArticleDeleteComplete', [
+                       &$wikiPageBeforeDelete,
+                       &$user,
+                       $reason,
+                       $id,
+                       $content,
+                       $logEntry,
+                       $archivedRevisionCount
+               ] );
                $status->value = $logid;
 
                // Show log excerpt on 404 pages rather than just a link
@@ -3003,8 +3031,16 @@ class WikiPage implements Page, IDBAccessObject {
         *   may already return null when the page proper was deleted.
         */
        public function doDeleteUpdates( $id, Content $content = null ) {
+               try {
+                       $countable = $this->isCountable();
+               } catch ( Exception $ex ) {
+                       // fallback for deleting broken pages for which we cannot load the content for
+                       // some reason. Note that doDeleteArticleReal() already logged this problem.
+                       $countable = false;
+               }
+
                // Update site status
-               DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, - (int)$this->isCountable(), -1 ) );
+               DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, - (int)$countable, -1 ) );
 
                // Delete pagelinks, update secondary indexes, etc
                $updates = $this->getDeletionUpdates( $content );
@@ -3620,7 +3656,14 @@ class WikiPage implements Page, IDBAccessObject {
                if ( !$content ) {
                        // load content object, which may be used to determine the necessary updates.
                        // XXX: the content may not be needed to determine the updates.
-                       $content = $this->getContent( Revision::RAW );
+                       try {
+                               $content = $this->getContent( Revision::RAW );
+                       } catch ( Exception $ex ) {
+                               // If we can't load the content, something is wrong. Perhaps that's why
+                               // the user is trying to delete the page, so let's not fail in that case.
+                               // Note that doDeleteArticleReal() will already have logged an issue with
+                               // loading the content.
+                       }
                }
 
                if ( !$content ) {