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+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup RevisionDelete
+ */
+
+/**
+ * List for revision table items
+ *
+ * This will check both the 'revision' table for live revisions and the
+ * 'archive' table for traditionally-deleted revisions that have an
+ * ar_rev_id saved.
+ *
+ * See RevDelRevisionItem and RevDelArchivedRevisionItem for items.
+ */
+class RevDelRevisionList extends RevDelList {
+ /** @var int */
+ public $currentRevId;
+
+ public function getType() {
+ return 'revision';
+ }
+
+ public static function getRelationType() {
+ return 'rev_id';
+ }
+
+ public static function getRestriction() {
+ return 'deleterevision';
+ }
+
+ public static function getRevdelConstant() {
+ return Revision::DELETED_TEXT;
+ }
+
+ public static function suggestTarget( $target, array $ids ) {
+ $rev = Revision::newFromId( $ids[0] );
+ return $rev ? $rev->getTitle() : $target;
+ }
+
+ /**
+ * @param DatabaseBase $db
+ * @return mixed
+ */
+ public function doQuery( $db ) {
+ $ids = array_map( 'intval', $this->ids );
+ $live = $db->select(
+ array( 'revision', 'page', 'user' ),
+ array_merge( Revision::selectFields(), Revision::selectUserFields() ),
+ array(
+ 'rev_page' => $this->title->getArticleID(),
+ 'rev_id' => $ids,
+ ),
+ __METHOD__,
+ array( 'ORDER BY' => 'rev_id DESC' ),
+ array(
+ 'page' => Revision::pageJoinCond(),
+ 'user' => Revision::userJoinCond() )
+ );
+
+ if ( $live->numRows() >= count( $ids ) ) {
+ // All requested revisions are live, keeps things simple!
+ return $live;
+ }
+
+ // Check if any requested revisions are available fully deleted.
+ $archived = $db->select( array( 'archive' ), Revision::selectArchiveFields(),
+ array(
+ 'ar_rev_id' => $ids
+ ),
+ __METHOD__,
+ array( 'ORDER BY' => 'ar_rev_id DESC' )
+ );
+
+ if ( $archived->numRows() == 0 ) {
+ return $live;
+ } elseif ( $live->numRows() == 0 ) {
+ return $archived;
+ } else {
+ // Combine the two! Whee
+ $rows = array();
+ foreach ( $live as $row ) {
+ $rows[$row->rev_id] = $row;
+ }
+ foreach ( $archived as $row ) {
+ $rows[$row->ar_rev_id] = $row;
+ }
+ krsort( $rows );
+ return new FakeResultWrapper( array_values( $rows ) );
+ }
+ }
+
+ public function newItem( $row ) {
+ if ( isset( $row->rev_id ) ) {
+ return new RevDelRevisionItem( $this, $row );
+ } elseif ( isset( $row->ar_rev_id ) ) {
+ return new RevDelArchivedRevisionItem( $this, $row );
+ } else {
+ // This shouldn't happen. :)
+ throw new MWException( 'Invalid row type in RevDelRevisionList' );
+ }
+ }
+
+ public function getCurrent() {
+ if ( is_null( $this->currentRevId ) ) {
+ $dbw = wfGetDB( DB_MASTER );
+ $this->currentRevId = $dbw->selectField(
+ 'page', 'page_latest', $this->title->pageCond(), __METHOD__ );
+ }
+ return $this->currentRevId;
+ }
+
+ public function getSuppressBit() {
+ return Revision::DELETED_RESTRICTED;
+ }
+
+ public function doPreCommitUpdates() {
+ $this->title->invalidateCache();
+ return Status::newGood();
+ }
+
+ public function doPostCommitUpdates() {
+ $this->title->purgeSquid();
+ // Extensions that require referencing previous revisions may need this
+ wfRunHooks( 'ArticleRevisionVisibilitySet', array( &$this->title ) );
+ return Status::newGood();
+ }
+}