1 files changed, 168 insertions, 0 deletions
diff --git a/www/wiki/includes/actions/RevertAction.php b/www/wiki/includes/actions/RevertAction.php
new file mode 100644
index 00000000..a914c9b2
--- /dev/null
+++ b/www/wiki/includes/actions/RevertAction.php
@@ -0,0 +1,168 @@
+<?php
+/**
+ * File reversion 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
+ * @ingroup Media
+ * @author Alexandre Emsenhuber
+ * @author Rob Church <robchur@gmail.com>
+ */
+
+/**
+ * File reversion user interface
+ *
+ * @ingroup Actions
+ */
+class RevertAction extends FormAction {
+	/**
+	 * @var OldLocalFile
+	 */
+	protected $oldFile;
+
+	public function getName() {
+		return 'revert';
+	}
+
+	public function getRestriction() {
+		return 'upload';
+	}
+
+	protected function checkCanExecute( User $user ) {
+		if ( $this->getTitle()->getNamespace() !== NS_FILE ) {
+			throw new ErrorPageError( $this->msg( 'nosuchaction' ), $this->msg( 'nosuchactiontext' ) );
+		}
+		parent::checkCanExecute( $user );
+
+		$oldimage = $this->getRequest()->getText( 'oldimage' );
+		if ( strlen( $oldimage ) < 16
+			|| strpos( $oldimage, '/' ) !== false
+			|| strpos( $oldimage, '\\' ) !== false
+		) {
+			throw new ErrorPageError( 'internalerror', 'unexpected', [ 'oldimage', $oldimage ] );
+		}
+
+		$this->oldFile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName(
+			$this->getTitle(),
+			$oldimage
+		);
+
+		if ( !$this->oldFile->exists() ) {
+			throw new ErrorPageError( '', 'filerevert-badversion' );
+		}
+	}
+
+	protected function usesOOUI() {
+		return true;
+	}
+
+	protected function alterForm( HTMLForm $form ) {
+		$form->setWrapperLegendMsg( 'filerevert-legend' );
+		$form->setSubmitTextMsg( 'filerevert-submit' );
+		$form->addHiddenField( 'oldimage', $this->getRequest()->getText( 'oldimage' ) );
+		$form->setTokenSalt( [ 'revert', $this->getTitle()->getPrefixedDBkey() ] );
+	}
+
+	protected function getFormFields() {
+		global $wgContLang;
+
+		$timestamp = $this->oldFile->getTimestamp();
+
+		$user = $this->getUser();
+		$lang = $this->getLanguage();
+		$userDate = $lang->userDate( $timestamp, $user );
+		$userTime = $lang->userTime( $timestamp, $user );
+		$siteTs = MWTimestamp::getLocalInstance( $timestamp );
+		$ts = $siteTs->format( 'YmdHis' );
+		$siteDate = $wgContLang->date( $ts, false, false );
+		$siteTime = $wgContLang->time( $ts, false, false );
+		$tzMsg = $siteTs->getTimezoneMessage()->inContentLanguage()->text();
+
+		return [
+			'intro' => [
+				'type' => 'info',
+				'vertical-label' => true,
+				'raw' => true,
+				'default' => $this->msg( 'filerevert-intro',
+					$this->getTitle()->getText(), $userDate, $userTime,
+					wfExpandUrl(
+						$this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ),
+						PROTO_CURRENT
+					) )->parseAsBlock()
+			],
+			'comment' => [
+				'type' => 'text',
+				'label-message' => 'filerevert-comment',
+				'default' => $this->msg( 'filerevert-defaultcomment', $siteDate, $siteTime,
+					$tzMsg )->inContentLanguage()->text()
+			]
+		];
+	}
+
+	public function onSubmit( $data ) {
+		$this->useTransactionalTimeLimit();
+
+		$old = $this->getRequest()->getText( 'oldimage' );
+		$localFile = $this->page->getFile();
+		$oldFile = OldLocalFile::newFromArchiveName( $this->getTitle(), $localFile->getRepo(), $old );
+
+		$source = $localFile->getArchiveVirtualUrl( $old );
+		$comment = $data['comment'];
+
+		if ( $localFile->getSha1() === $oldFile->getSha1() ) {
+			return Status::newFatal( 'filerevert-identical' );
+		}
+
+		// TODO: Preserve file properties from database instead of reloading from file
+		return $localFile->upload(
+			$source,
+			$comment,
+			$comment,
+			0,
+			false,
+			false,
+			$this->getUser()
+		);
+	}
+
+	public function onSuccess() {
+		$timestamp = $this->oldFile->getTimestamp();
+		$user = $this->getUser();
+		$lang = $this->getLanguage();
+		$userDate = $lang->userDate( $timestamp, $user );
+		$userTime = $lang->userTime( $timestamp, $user );
+
+		$this->getOutput()->addWikiMsg( 'filerevert-success', $this->getTitle()->getText(),
+			$userDate, $userTime,
+			wfExpandUrl( $this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ),
+				PROTO_CURRENT
+		) );
+		$this->getOutput()->returnToMain( false, $this->getTitle() );
+	}
+
+	protected function getPageTitle() {
+		return $this->msg( 'filerevert', $this->getTitle()->getText() );
+	}
+
+	protected function getDescription() {
+		return OutputPage::buildBacklinkSubtitle( $this->getTitle() );
+	}
+
+	public function doesWrites() {
+		return true;
+	}
+}