imagepage.php

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	 * we follow it with an upload history of the image and its usage.
	 */
	function imageHistory()
	{
		global $wgUser, $wgOut, $wgUseExternalEditor;

		$sk = $wgUser->getSkin();

		$line = $this->img->nextHistoryLine();

		if ( $line ) {
			$list =& new ImageHistoryList( $sk );
			$s = $list->beginImageHistoryList() .
				$list->imageHistoryLine( true, wfTimestamp(TS_MW, $line->img_timestamp),
					$this->mTitle->getDBkey(),  $line->img_user,
					$line->img_user_text, $line->img_size, $line->img_description,
					$line->img_width, $line->img_height
				);

			while ( $line = $this->img->nextHistoryLine() ) {
				$s .= $list->imageHistoryLine( false, $line->img_timestamp,
			  		$line->oi_archive_name, $line->img_user,
			  		$line->img_user_text, $line->img_size, $line->img_description,
					$line->img_width, $line->img_height
				);
			}
			$s .= $list->endImageHistoryList();
		} else { $s=''; }
		$wgOut->addHTML( $s );

		# Exist check because we don't want to show this on pages where an image
		# doesn't exist along with the noimage message, that would suck. -忙var
		if( $wgUseExternalEditor && $this->img->exists() ) {
			$this->uploadLinksBox();
		}

	}

	function imageLinks()
	{
		global $wgUser, $wgOut;

		$wgOut->addHTML( '<h2 id="filelinks">' . wfMsg( 'imagelinks' ) . "</h2>\n" );

		$dbr =& wfGetDB( DB_SLAVE );
		$page = $dbr->tableName( 'page' );
		$imagelinks = $dbr->tableName( 'imagelinks' );

		$sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
		  $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
		$sql = $dbr->limitResult($sql, 500, 0);
		$res = $dbr->query( $sql, "ImagePage::imageLinks" );

		if ( 0 == $dbr->numRows( $res ) ) {
			$wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
			return;
		}
		$wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );

		$sk = $wgUser->getSkin();
		while ( $s = $dbr->fetchObject( $res ) ) {
			$name = Title::MakeTitle( $s->page_namespace, $s->page_title );
			$link = $sk->makeKnownLinkObj( $name, "" );
			$wgOut->addHTML( "<li>{$link}</li>\n" );
		}
		$wgOut->addHTML( "</ul>\n" );
	}

	function delete()
	{
		global $wgUser, $wgOut, $wgRequest;

		$confirm = $wgRequest->wasPosted();
		$image = $wgRequest->getVal( 'image' );
		$oldimage = $wgRequest->getVal( 'oldimage' );

		# Only sysops can delete images. Previously ordinary users could delete
		# old revisions, but this is no longer the case.
		if ( !$wgUser->isAllowed('delete') ) {
			$wgOut->sysopRequired();
			return;
		}
		if ( $wgUser->isBlocked() ) {
			return $this->blockedIPpage();
		}
		if ( wfReadOnly() ) {
			$wgOut->readOnlyPage();
			return;
		}

		# Better double-check that it hasn't been deleted yet!
		$wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
		if ( ( !is_null( $image ) )
		  && ( '' == trim( $image ) ) ) {
			$wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
			return;
		}

		$this->img  = new Image( $this->mTitle );

		# Deleting old images doesn't require confirmation
		if ( !is_null( $oldimage ) || $confirm ) {
			if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
				$this->doDelete();
			} else {
				$wgOut->showFatalError( wfMsg( 'sessionfailure' ) );
			}
			return;
		}

		if ( !is_null( $image ) ) {
			$q = '&image=' . urlencode( $image );
		} else if ( !is_null( $oldimage ) ) {
			$q = '&oldimage=' . urlencode( $oldimage );
		} else {
			$q = '';
		}
		return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
	}

	function doDelete()	{
		global $wgOut, $wgRequest, $wgUseSquid;
		global $wgPostCommitUpdateList;

		$fname = 'ImagePage::doDelete';

		$reason = $wgRequest->getVal( 'wpReason' );
		$oldimage = $wgRequest->getVal( 'oldimage' );

		$dbw =& wfGetDB( DB_MASTER );

		if ( !is_null( $oldimage ) ) {
			if ( strlen( $oldimage ) < 16 ) {
				$wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
				return;
			}
			if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
				$wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
				return;
			}
			if ( !$this->doDeleteOldImage( $oldimage ) ) {
				return;
			}
			$deleted = $oldimage;
		} else {
			$ok = $this->img->delete( $reason );
			if( !$ok ) {
				# If the deletion operation actually failed, bug out:
				$wgOut->showFileDeleteError( $this->img->getName() );
				return;
			}
			
			# Image itself is now gone, and database is cleaned.
			# Now we remove the image description page.
	
			$article = new Article( $this->mTitle );
			$article->doDeleteArticle( $reason ); # ignore errors

			$deleted = $this->img->getName();
		}

		$wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
		$wgOut->setRobotpolicy( 'noindex,nofollow' );

		$loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
		$text = wfMsg( 'deletedtext', $deleted, $loglink );

		$wgOut->addWikiText( $text );

		$wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
	}

	/**
	 * @return success
	 */
	function doDeleteOldImage( $oldimage )
	{
		global $wgOut;

		$ok = $this->img->deleteOld( $oldimage, '' );
		if( !$ok ) {
			# If we actually have a file and can't delete it, throw an error.
			# Something went awry...
			$wgOut->showFileDeleteError( "$oldimage" );
		} else {
			# Log the deletion
			$log = new LogPage( 'delete' );
			$log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
		}
		return $ok;
	}

	function revert() {
		global $wgOut, $wgRequest, $wgUser;

		$oldimage = $wgRequest->getText( 'oldimage' );
		if ( strlen( $oldimage ) < 16 ) {
			$wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
			return;
		}
		if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
			$wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
			return;
		}

		if ( wfReadOnly() ) {
			$wgOut->readOnlyPage();
			return;
		}
		if( $wgUser->isAnon() ) {
			$wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
			return;
		}
		if ( ! $this->mTitle->userCanEdit() ) {
			$wgOut->sysopRequired();
			return;
		}
		if ( $wgUser->isBlocked() ) {
			return $this->blockedIPpage();
		}
		if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
			$wgOut->showErrorPage( 'internalerror', 'sessionfailure' );
			return;
		}
		$name = substr( $oldimage, 15 );

		$dest = wfImageDir( $name );
		$archive = wfImageArchiveDir( $name );
		$curfile = "{$dest}/{$name}";

		if ( !is_dir( $dest ) ) wfMkdirParents( $dest );
		if ( !is_dir( $archive ) ) wfMkdirParents( $archive );

		if ( ! is_file( $curfile ) ) {
			$wgOut->showFileNotFoundError( htmlspecialchars( $curfile ) );
			return;
		}
		$oldver = wfTimestampNow() . "!{$name}";

		$dbr =& wfGetDB( DB_SLAVE );
		$size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );

		if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
			$wgOut->showFileRenameError( $curfile, "${archive}/{$oldver}" );
			return;
		}
		if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
			$wgOut->showFileCopyError( "${archive}/{$oldimage}", $curfile );
			return;
		}

		# Record upload and update metadata cache
		$img = Image::newFromName( $name );
		$img->recordUpload( $oldver, wfMsg( "reverted" ) );

		$wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
		$wgOut->setRobotpolicy( 'noindex,nofollow' );
		$wgOut->addHTML( wfMsg( 'imagereverted' ) );

		$descTitle = $img->getTitle();
		$wgOut->returnToMain( false, $descTitle->getPrefixedText() );
	}

	function blockedIPpage() {
		$edit = new EditPage( $this );
		return $edit->blockedIPpage();
	}
	
	/**
	 * Override handling of action=purge
	 */
	function doPurge() {
		$this->img = new Image( $this->mTitle );
		if( $this->img->exists() ) {
			wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
			$update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
			$update->doUpdate();
			$this->img->purgeCache();
		} else {
			wfDebug( "ImagePage::doPurge no image\n" );
		}
		parent::doPurge();
	}

}

/**
 * @todo document
 * @package MediaWiki
 */
class ImageHistoryList {
	function ImageHistoryList( &$skin ) {
		$this->skin =& $skin;
	}

	function beginImageHistoryList() {
		$s = "\n<h2 id=\"filehistory\">" . wfMsg( 'imghistory' ) . "</h2>\n" .
		  "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
		return $s;
	}

	function endImageHistoryList() {
		$s = "</ul>\n";
		return $s;
	}

	function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
		global $wgUser, $wgLang, $wgTitle, $wgContLang;

		$datetime = $wgLang->timeanddate( $timestamp, true );
		$del = wfMsg( 'deleteimg' );
		$delall = wfMsg( 'deleteimgcompletely' );
		$cur = wfMsg( 'cur' );

		if ( $iscur ) {
			$url = Image::imageUrl( $img );
			$rlink = $cur;
			if ( $wgUser->isAllowed('delete') ) {
				$link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
				  '&action=delete' );
				$style = $this->skin->getInternalLinkAttributes( $link, $delall );

				$dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
			} else {
				$dlink = $del;
			}
		} else {
			$url = htmlspecialchars( wfImageArchiveUrl( $img ) );
			if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
				$token = urlencode( $wgUser->editToken( $img ) );
				$rlink = $this->skin->makeKnownLinkObj( $wgTitle,
				           wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
				           urlencode( $img ) . "&wpEditToken=$token" );
				$dlink = $this->skin->makeKnownLinkObj( $wgTitle,
				           $del, 'action=delete&oldimage=' . urlencode( $img ) .
				           "&wpEditToken=$token" );
			} else {
				# Having live active links for non-logged in users
				# means that bots and spiders crawling our site can
				# inadvertently change content. Baaaad idea.
				$rlink = wfMsg( 'revertimg' );
				$dlink = $del;
			}
		}
		
		$userlink = $this->skin->userLink( $user, $usertext ) . $this->skin->userToolLinks( $user, $usertext );
		$nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
			$wgLang->formatNum( $size ) );
		$widthheight = wfMsg( 'widthheight', $width, $height );
		$style = $this->skin->getInternalLinkAttributes( $url, $datetime );

		$s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userlink} . . {$widthheight} ({$nbytes})";

		$s .= $this->skin->commentBlock( $description, $wgTitle );
		$s .= "</li>\n";
		return $s;
	}

}


?>