X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/mediawiki.git/blobdiff_plain/a4b52d2fe555a507c376e78ee624898c55968364..d7967d5e4460e08b6b258307afbca0596b18a3dd:/includes/FileDeleteForm.php

diff --git a/includes/FileDeleteForm.php b/includes/FileDeleteForm.php
new file mode 100644
index 00000000..ee165cd1
--- /dev/null
+++ b/includes/FileDeleteForm.php
@@ -0,0 +1,220 @@
+<?php
+
+/**
+ * File deletion user interface
+ *
+ * @addtogroup Media
+ * @author Rob Church <robchur@gmail.com>
+ */
+class FileDeleteForm {
+
+	private $title = null;
+	private $file = null;
+
+	private $oldfile = null;
+	private $oldimage = '';
+	
+	/**
+	 * Constructor
+	 *
+	 * @param File $file File we're deleting
+	 */
+	public function __construct( $file ) {
+		$this->title = $file->getTitle();
+		$this->file = $file;
+	}
+	
+	/**
+	 * Fulfil the request; shows the form or deletes the file,
+	 * pending authentication, confirmation, etc.
+	 */
+	public function execute() {
+		global $wgOut, $wgRequest, $wgUser;
+		$this->setHeaders();
+
+		if( wfReadOnly() ) {
+			$wgOut->readOnlyPage();
+			return;
+		} elseif( !$wgUser->isLoggedIn() ) {
+			$wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
+			return;
+		} elseif( !$wgUser->isAllowed( 'delete' ) ) {
+			$wgOut->permissionError( 'delete' );
+			return;
+		} elseif( $wgUser->isBlocked() ) {
+			$wgOut->blockedPage();
+			return;
+		}
+		
+		$this->oldimage = $wgRequest->getText( 'oldimage', false );
+		$token = $wgRequest->getText( 'wpEditToken' );
+		if( $this->oldimage && !$this->isValidOldSpec() ) {
+			$wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars( $this->oldimage ) );
+			return;
+		}
+		if( $this->oldimage )
+			$this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage );
+		
+		if( !$this->haveDeletableFile() ) {
+			$wgOut->addHtml( $this->prepareMessage( 'filedelete-nofile' ) );
+			$wgOut->addReturnTo( $this->title );
+			return;
+		}
+		
+		// Perform the deletion if appropriate
+		if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
+			$comment = $wgRequest->getText( 'wpReason' );
+			if( $this->oldimage ) {
+				$status = $this->file->deleteOld( $this->oldimage, $comment );
+				if( $status->ok ) {
+					// Need to do a log item
+					$log = new LogPage( 'delete' );
+					$log->addEntry( 'delete', $this->title, wfMsg( 'deletedrevision' , $this->oldimage ) );
+				}
+			} else {
+				$status = $this->file->delete( $comment );
+				if( $status->ok ) {
+					// Need to delete the associated article
+					$article = new Article( $this->title );
+					$article->doDeleteArticle( $comment );
+				}
+			}
+			if( !$status->isGood() )
+				$wgOut->addWikiText( $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) );
+			if( $status->ok ) {
+				$wgOut->addHtml( $this->prepareMessage( 'filedelete-success' ) );
+				// Return to the main page if we just deleted all versions of the
+				// file, otherwise go back to the description page
+				$wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );
+			}
+			return;
+		}
+		
+		$this->showForm();
+		$this->showLogEntries();
+	}
+	
+	/**
+	 * Show the confirmation form
+	 */
+	private function showForm() {
+		global $wgOut, $wgUser, $wgRequest;
+		
+		$form  = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction() ) );
+		$form .= Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->oldimage ) );
+		$form .= '<fieldset><legend>' . wfMsgHtml( 'filedelete-legend' ) . '</legend>';
+		$form .= $this->prepareMessage( 'filedelete-intro' );
+		
+		$form .= '<p>' . Xml::inputLabel( wfMsg( 'filedelete-comment' ), 'wpReason', 'wpReason',
+			60, $wgRequest->getText( 'wpReason' ) ) . '</p>';
+		$form .= '<p>' . Xml::submitButton( wfMsg( 'filedelete-submit' ) ) . '</p>';
+		$form .= '</fieldset>';
+		$form .= '</form>';
+		
+		$wgOut->addHtml( $form );
+	}
+	
+	/**
+	 * Show deletion log fragments pertaining to the current file
+	 */
+	private function showLogEntries() {
+		global $wgOut;
+		$wgOut->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
+		$reader = new LogViewer(
+			new LogReader(
+				new FauxRequest(
+					array(
+						'type' => 'delete',
+						'page' => $this->title->getPrefixedText(),
+					)
+				)
+			)
+		);
+		$reader->showList( $wgOut );		
+	}
+	
+	/**
+	 * Prepare a message referring to the file being deleted,
+	 * showing an appropriate message depending upon whether
+	 * it's a current file or an old version
+	 *
+	 * @param string $message Message base
+	 * @return string
+	 */
+	private function prepareMessage( $message ) {
+		global $wgLang, $wgServer;
+		if( $this->oldimage ) {
+			return wfMsgExt(
+				"{$message}-old",
+				'parse',
+				$this->title->getText(),
+				$wgLang->date( $this->getTimestamp(), true ),
+				$wgLang->time( $this->getTimestamp(), true ),
+				$wgServer . $this->file->getArchiveUrl( $this->oldimage )
+			);
+		} else {
+			return wfMsgExt(
+				$message,
+				'parse',
+				$this->title->getText()
+			);
+		}
+	}
+	
+	/**
+	 * Set headers, titles and other bits
+	 */
+	private function setHeaders() {
+		global $wgOut, $wgUser;
+		$wgOut->setPageTitle( wfMsg( 'filedelete', $this->title->getText() ) );
+		$wgOut->setRobotPolicy( 'noindex,nofollow' );
+		$wgOut->setSubtitle( wfMsg( 'filedelete-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;
+	}
+	
+	/**
+	 * Could we delete the file specified? If an `oldimage`
+	 * value was provided, does it correspond to an
+	 * existing, local, old version of this file?
+	 *
+	 * @return bool
+	 */
+	private function haveDeletableFile() {
+		return $this->oldimage
+			? $this->oldfile && $this->oldfile->exists() && $this->oldfile->isLocal()
+			: $this->file && $this->file->exists() && $this->file->isLocal();
+	}
+	
+	/**
+	 * Prepare the form action
+	 *
+	 * @return string
+	 */
+	private function getAction() {
+		$q = array();
+		$q[] = 'action=delete';
+		if( $this->oldimage )
+			$q[] = 'oldimage=' . urlencode( $this->oldimage );
+		return $this->title->getLocalUrl( implode( '&', $q ) );
+	}
+	
+	/**
+	 * Extract the timestamp of the old version
+	 *
+	 * @return string
+	 */
+	private function getTimestamp() {
+		return $this->oldfile->getTimestamp();
+	}
+	
+}
\ No newline at end of file