From 8f416baead93a48e5799e44b8bd2e2c4859f4e04 Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Fri, 14 Sep 2007 13:18:58 +0200
Subject: auf Version 1.11 aktualisiert; Login-Bug behoben

---
 includes/FileRevertForm.php | 165 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 includes/FileRevertForm.php

(limited to 'includes/FileRevertForm.php')

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;
+	}
+	
+}
\ No newline at end of file
-- 
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