1 files changed, 164 insertions, 0 deletions
diff --git a/www/wiki/includes/actions/RollbackAction.php b/www/wiki/includes/actions/RollbackAction.php
new file mode 100644
index 00000000..9d336e46
--- /dev/null
+++ b/www/wiki/includes/actions/RollbackAction.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ * Edit rollback user interface
+ *
+ * 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
+ *
+ * @file
+ * @ingroup Actions
+ */
+
+/**
+ * User interface for the rollback action
+ *
+ * @ingroup Actions
+ */
+class RollbackAction extends FormlessAction {
+
+	public function getName() {
+		return 'rollback';
+	}
+
+	public function getRestriction() {
+		return 'rollback';
+	}
+
+	/**
+	 * Temporarily unused message keys due to T88044/T136375:
+	 * - confirm-rollback-top
+	 * - confirm-rollback-button
+	 * - rollbackfailed
+	 * - rollback-missingparam
+	 * - rollback-success-notify
+	 */
+
+	/**
+	 * @throws ErrorPageError
+	 */
+	public function onView() {
+		// TODO: use $this->useTransactionalTimeLimit(); when POST only
+		wfTransactionalTimeLimit();
+
+		$request = $this->getRequest();
+		$user = $this->getUser();
+		$from = $request->getVal( 'from' );
+		$rev = $this->page->getRevision();
+		if ( $from === null ) {
+			throw new ErrorPageError( 'rollbackfailed', 'rollback-missingparam' );
+		}
+		if ( !$rev ) {
+			throw new ErrorPageError( 'rollbackfailed', 'rollback-missingrevision' );
+		}
+		if ( $from !== $rev->getUserText() ) {
+			throw new ErrorPageError( 'rollbackfailed', 'alreadyrolled', [
+				$this->getTitle()->getPrefixedText(),
+				$from,
+				$rev->getUserText()
+			] );
+		}
+
+		$data = null;
+		$errors = $this->page->doRollback(
+			$from,
+			$request->getText( 'summary' ),
+			$request->getVal( 'token' ),
+			$request->getBool( 'bot' ),
+			$data,
+			$this->getUser()
+		);
+
+		if ( in_array( [ 'actionthrottledtext' ], $errors ) ) {
+			throw new ThrottledError;
+		}
+
+		if ( isset( $errors[0][0] ) &&
+			( $errors[0][0] == 'alreadyrolled' || $errors[0][0] == 'cantrollback' )
+		) {
+			$this->getOutput()->setPageTitle( $this->msg( 'rollbackfailed' ) );
+			$errArray = $errors[0];
+			$errMsg = array_shift( $errArray );
+			$this->getOutput()->addWikiMsgArray( $errMsg, $errArray );
+
+			if ( isset( $data['current'] ) ) {
+				/** @var Revision $current */
+				$current = $data['current'];
+
+				if ( $current->getComment() != '' ) {
+					$this->getOutput()->addHTML( $this->msg( 'editcomment' )->rawParams(
+						Linker::formatComment( $current->getComment() ) )->parse() );
+				}
+			}
+
+			return;
+		}
+
+		# NOTE: Permission errors already handled by Action::checkExecute.
+		if ( $errors == [ [ 'readonlytext' ] ] ) {
+			throw new ReadOnlyError;
+		}
+
+		# XXX: Would be nice if ErrorPageError could take multiple errors, and/or a status object.
+		#      Right now, we only show the first error
+		foreach ( $errors as $error ) {
+			throw new ErrorPageError( 'rollbackfailed', $error[0], array_slice( $error, 1 ) );
+		}
+
+		/** @var Revision $current */
+		$current = $data['current'];
+		$target = $data['target'];
+		$newId = $data['newid'];
+		$this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
+		$this->getOutput()->setRobotPolicy( 'noindex,nofollow' );
+
+		$old = Linker::revUserTools( $current );
+		$new = Linker::revUserTools( $target );
+		$this->getOutput()->addHTML(
+			$this->msg( 'rollback-success' )
+				->rawParams( $old, $new )
+				->params( $current->getUserText( Revision::FOR_THIS_USER, $user ) )
+				->params( $target->getUserText( Revision::FOR_THIS_USER, $user ) )
+				->parseAsBlock()
+		);
+
+		if ( $user->getBoolOption( 'watchrollback' ) ) {
+			$user->addWatch( $this->page->getTitle(), User::IGNORE_USER_RIGHTS );
+		}
+
+		$this->getOutput()->returnToMain( false, $this->getTitle() );
+
+		if ( !$request->getBool( 'hidediff', false ) &&
+			!$this->getUser()->getBoolOption( 'norollbackdiff' )
+		) {
+			$contentHandler = $current->getContentHandler();
+			$de = $contentHandler->createDifferenceEngine(
+				$this->getContext(),
+				$current->getId(),
+				$newId,
+				false,
+				true
+			);
+			$de->showDiff( '', '' );
+		}
+		return;
+	}
+
+	protected function getDescription() {
+		return '';
+	}
+
+	public function doesWrites() {
+		return true;
+	}
+}