diff options
Diffstat (limited to 'includes/FileRevertForm.php')
| -rw-r--r-- | includes/FileRevertForm.php | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/includes/FileRevertForm.php b/includes/FileRevertForm.php new file mode 100644 index 00000000..55f21fff --- /dev/null +++ b/includes/FileRevertForm.php @@ -0,0 +1,165 @@ +<?php + +/** + * File reversion user interface + * + * @addtogroup Media + * @author Rob Church <robchur@gmail.com> + */ +class FileRevertForm { + + private $title = null; + private $file = null; + private $oldimage = ''; + private $timestamp = false; + + /** + * Constructor + * + * @param File $file File we're reverting + */ + public function __construct( $file ) { + $this->title = $file->getTitle(); + $this->file = $file; + } + + /** + * Fulfil the request; shows the form or reverts the file, + * pending authentication, confirmation, etc. + */ + public function execute() { + global $wgOut, $wgRequest, $wgUser, $wgLang, $wgServer; + $this->setHeaders(); + + if( wfReadOnly() ) { + $wgOut->readOnlyPage(); + return; + } elseif( !$wgUser->isLoggedIn() ) { + $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' ); + return; + } elseif( !$this->title->userCan( 'edit' ) ) { + // The standard read-only thing doesn't make a whole lot of sense + // here; surely it should show the image or something? -- RC + $article = new Article( $this->title ); + $wgOut->readOnlyPage( $article->getContent(), true ); + return; + } elseif( $wgUser->isBlocked() ) { + $wgOut->blockedPage(); + return; + } + + $this->oldimage = $wgRequest->getText( 'oldimage' ); + $token = $wgRequest->getText( 'wpEditToken' ); + if( !$this->isValidOldSpec() ) { + $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars( $this->oldimage ) ); + return; + } + + if( !$this->haveOldVersion() ) { + $wgOut->addHtml( wfMsgExt( 'filerevert-badversion', 'parse' ) ); + $wgOut->returnToMain( false, $this->title ); + return; + } + + // Perform the reversion if appropriate + if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) { + $source = $this->file->getArchiveVirtualUrl( $this->oldimage ); + $comment = $wgRequest->getText( 'wpComment' ); + // TODO: Preserve file properties from database instead of reloading from file + $status = $this->file->upload( $source, $comment, $comment ); + if( $status->isGood() ) { + $wgOut->addHtml( wfMsgExt( 'filerevert-success', 'parse', $this->title->getText(), + $wgLang->date( $this->getTimestamp(), true ), + $wgLang->time( $this->getTimestamp(), true ), + $wgServer . $this->file->getArchiveUrl( $this->oldimage ) ) ); + $wgOut->returnToMain( false, $this->title ); + } else { + $wgOut->addWikiText( $status->getWikiText() ); + } + return; + } + + // Show the form + $this->showForm(); + } + + /** + * Show the confirmation form + */ + private function showForm() { + global $wgOut, $wgUser, $wgRequest, $wgLang, $wgContLang, $wgServer; + $timestamp = $this->getTimestamp(); + + $form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction() ) ); + $form .= Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->oldimage ) ); + $form .= '<fieldset><legend>' . wfMsgHtml( 'filerevert-legend' ) . '</legend>'; + $form .= wfMsgExt( 'filerevert-intro', 'parse', $this->title->getText(), + $wgLang->date( $timestamp, true ), $wgLang->time( $timestamp, true ), $wgServer . $this->file->getArchiveUrl( $this->oldimage ) ); + $form .= '<p>' . Xml::inputLabel( wfMsg( 'filerevert-comment' ), 'wpComment', 'wpComment', + 60, wfMsgForContent( 'filerevert-defaultcomment', + $wgContLang->date( $timestamp, false, false ), $wgContLang->time( $timestamp, false, false ) ) ) . '</p>'; + $form .= '<p>' . Xml::submitButton( wfMsg( 'filerevert-submit' ) ) . '</p>'; + $form .= '</fieldset>'; + $form .= '</form>'; + + $wgOut->addHtml( $form ); + } + + /** + * Set headers, titles and other bits + */ + private function setHeaders() { + global $wgOut, $wgUser; + $wgOut->setPageTitle( wfMsg( 'filerevert', $this->title->getText() ) ); + $wgOut->setRobotPolicy( 'noindex,nofollow' ); + $wgOut->setSubtitle( wfMsg( 'filerevert-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->title ) ) ); + } + + /** + * Is the provided `oldimage` value valid? + * + * @return bool + */ + private function isValidOldSpec() { + return strlen( $this->oldimage ) >= 16 + && strpos( $this->oldimage, '/' ) === false + && strpos( $this->oldimage, '\\' ) === false; + } + + /** + * Does the provided `oldimage` value correspond + * to an existing, local, old version of this file? + * + * @return bool + */ + private function haveOldVersion() { + $file = wfFindFile( $this->title, $this->oldimage ); + return $file && $file->exists() && $file->isLocal(); + } + + /** + * Prepare the form action + * + * @return string + */ + private function getAction() { + $q = array(); + $q[] = 'action=revert'; + $q[] = 'oldimage=' . urlencode( $this->oldimage ); + return $this->title->getLocalUrl( implode( '&', $q ) ); + } + + /** + * Extract the timestamp of the old version + * + * @return string + */ + private function getTimestamp() { + if( $this->timestamp === false ) { + $file = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage ); + $this->timestamp = $file->getTimestamp(); + } + return $this->timestamp; + } + +}
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