FileDeleteForm.php

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<?php
class FileDeleteForm {

    private $title = null;

    private $file = null;

    private $oldfile = null;
    private $oldimage = '';

    public function __construct( $file ) {
        $this->title = $file->getTitle();
        $this->file = $file;
    }

    public function execute() {
        global $wgOut, $wgRequest, $wgUser, $wgUploadMaintenance;

        $permissionErrors = $this->title->getUserPermissionsErrors( 'delete', $wgUser );
        if ( count( $permissionErrors ) ) {
            throw new PermissionsError( 'delete', $permissionErrors );
        }

        if ( wfReadOnly() ) {
            throw new ReadOnlyError;
        }

        if ( $wgUploadMaintenance ) {
            throw new ErrorPageError( 'filedelete-maintenance-title', 'filedelete-maintenance' );
        }

        $this->setHeaders();

        $this->oldimage = $wgRequest->getText( 'oldimage', false );
        $token = $wgRequest->getText( 'wpEditToken' );
        # Flag to hide all contents of the archived revisions
        $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );

        if ( $this->oldimage ) {
            $this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName(
                $this->title,
                $this->oldimage
            );
        }

        if ( !self::haveDeletableFile( $this->file, $this->oldfile, $this->oldimage ) ) {
            $wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
            $wgOut->addReturnTo( $this->title );
            return;
        }

        // Perform the deletion if appropriate
        if ( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
            $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
            $deleteReason = $wgRequest->getText( 'wpReason' );

            if ( $deleteReasonList == 'other' ) {
                $reason = $deleteReason;
            } elseif ( $deleteReason != '' ) {
                // Entry from drop down menu + additional comment
                $reason = $deleteReasonList . wfMessage( 'colon-separator' )
                    ->inContentLanguage()->text() . $deleteReason;
            } else {
                $reason = $deleteReasonList;
            }

            $status = self::doDelete(
                $this->title,
                $this->file,
                $this->oldimage,
                $reason,
                $suppress,
                $wgUser
            );

            if ( !$status->isGood() ) {
                $wgOut->addHTML( '<h2>' . $this->prepareMessage( 'filedeleteerror-short' ) . "</h2>\n" );
                $wgOut->addWikiText( '<div class="error">' .
                    $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' )
                    . '</div>' );
            }
            if ( $status->ok ) {
                $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
                $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() );

                WatchAction::doWatchOrUnwatch( $wgRequest->getCheck( 'wpWatch' ), $this->title, $wgUser );
            }
            return;
        }

        $this->showForm();
        $this->showLogEntries();
    }

    public static function doDelete( &$title, &$file, &$oldimage, $reason,
        $suppress, User $user = null
    ) {
        if ( $user === null ) {
            global $wgUser;
            $user = $wgUser;
        }

        if ( $oldimage ) {
            $page = null;
            $status = $file->deleteOld( $oldimage, $reason, $suppress, $user );
            if ( $status->ok ) {
                // Need to do a log item
                $logComment = wfMessage( 'deletedrevision', $oldimage )->inContentLanguage()->text();
                if ( trim( $reason ) != '' ) {
                    $logComment .= wfMessage( 'colon-separator' )
                        ->inContentLanguage()->text() . $reason;
                }

                $logtype = $suppress ? 'suppress' : 'delete';

                $logEntry = new ManualLogEntry( $logtype, 'delete' );
                $logEntry->setPerformer( $user );
                $logEntry->setTarget( $title );
                $logEntry->setComment( $logComment );
                $logid = $logEntry->insert();
                $logEntry->publish( $logid );

                $status->value = $logid;
            }
        } else {
            $status = Status::newFatal( 'cannotdelete',
                wfEscapeWikiText( $title->getPrefixedText() )
            );
            $page = WikiPage::factory( $title );
            $dbw = wfGetDB( DB_MASTER );
            try {
                $dbw->startAtomic( __METHOD__ );
                // delete the associated article first
                $error = '';
                $deleteStatus = $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user );
                // doDeleteArticleReal() returns a non-fatal error status if the page
                // or revision is missing, so check for isOK() rather than isGood()
                if ( $deleteStatus->isOK() ) {
                    $status = $file->delete( $reason, $suppress, $user );
                    if ( $status->isOK() ) {
                        $status->value = $deleteStatus->value; // log id
                        $dbw->endAtomic( __METHOD__ );
                    } else {
                        // Page deleted but file still there? rollback page delete
                        $dbw->rollback( __METHOD__ );
                    }
                } else {
                    // Done; nothing changed
                    $dbw->endAtomic( __METHOD__ );
                }
            } catch ( Exception $e ) {
                // Rollback before returning to prevent UI from displaying
                // incorrect "View or restore N deleted edits?"
                $dbw->rollback( __METHOD__ );
                throw $e;
            }
        }

        if ( $status->isOK() ) {
            Hooks::run( 'FileDeleteComplete', [ &$file, &$oldimage, &$page, &$user, &$reason ] );
        }

        return $status;
    }

    private function showForm() {
        global $wgOut, $wgUser, $wgRequest;

        if ( $wgUser->isAllowed( 'suppressrevision' ) ) {
            $suppress = "<tr id=\"wpDeleteSuppressRow\">
                    <td></td>
                    <td class='mw-input'><strong>" .
                        Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
                            'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '3' ] ) .
                    "</strong></td>
                </tr>";
        } else {
            $suppress = '';
        }

        $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $wgUser->isWatched( $this->title );
        $form = Xml::openElement( 'form', [ 'method' => 'post', 'action' => $this->getAction(),
            'id' => 'mw-img-deleteconfirm' ] ) .
            Xml::openElement( 'fieldset' ) .
            Xml::element( 'legend', null, wfMessage( 'filedelete-legend' )->text() ) .
            Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
            $this->prepareMessage( 'filedelete-intro' ) .
            Xml::openElement( 'table', [ 'id' => 'mw-img-deleteconfirm-table' ] ) .
            "<tr>
                <td class='mw-label'>" .
                    Xml::label( wfMessage( 'filedelete-comment' )->text(), 'wpDeleteReasonList' ) .
                "</td>
                <td class='mw-input'>" .
                    Xml::listDropDown(
                        'wpDeleteReasonList',
                        wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->text(),
                        wfMessage( 'filedelete-reason-otherlist' )->inContentLanguage()->text(),
                        '',
                        'wpReasonDropDown',
                        1
                    ) .
                "</td>
            </tr>
            <tr>
                <td class='mw-label'>" .
                    Xml::label( wfMessage( 'filedelete-otherreason' )->text(), 'wpReason' ) .
                "</td>
                <td class='mw-input'>" .
                    Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
                        [ 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ] ) .
                "</td>
            </tr>
            {$suppress}";
        if ( $wgUser->isLoggedIn() ) {
            $form .= "
            <tr>
                <td></td>
                <td class='mw-input'>" .
                    Xml::checkLabel( wfMessage( 'watchthis' )->text(),
                        'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] ) .
                "</td>
            </tr>";
        }
        $form .= "
            <tr>
                <td></td>
                <td class='mw-submit'>" .
                    Xml::submitButton(
                        wfMessage( 'filedelete-submit' )->text(),
                        [
                            'name' => 'mw-filedelete-submit',
                            'id' => 'mw-filedelete-submit',
                            'tabindex' => '4'
                        ]
                    ) .
                "</td>
            </tr>" .
            Xml::closeElement( 'table' ) .
            Xml::closeElement( 'fieldset' ) .
            Xml::closeElement( 'form' );

            if ( $wgUser->isAllowed( 'editinterface' ) ) {
                $title = wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->getTitle();
                $link = Linker::linkKnown(
                    $title,
                    wfMessage( 'filedelete-edit-reasonlist' )->escaped(),
                    [],
                    [ 'action' => 'edit' ]
                );
                $form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
            }

        $wgOut->addHTML( $form );
    }

    private function showLogEntries() {
        global $wgOut;
        $deleteLogPage = new LogPage( 'delete' );
        $wgOut->addHTML( '<h2>' . $deleteLogPage->getName()->escaped() . "</h2>\n" );
        LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
    }

    private function prepareMessage( $message ) {
        global $wgLang;
        if ( $this->oldimage ) {
            # Message keys used:
            # 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
            return wfMessage(
                "{$message}-old",
                wfEscapeWikiText( $this->title->getText() ),
                $wgLang->date( $this->getTimestamp(), true ),
                $wgLang->time( $this->getTimestamp(), true ),
                wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) )->parseAsBlock();
        } else {
            return wfMessage(
                $message,
                wfEscapeWikiText( $this->title->getText() )
            )->parseAsBlock();
        }
    }

    private function setHeaders() {
        global $wgOut;
        $wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
        $wgOut->setRobotPolicy( 'noindex,nofollow' );
        $wgOut->addBacklinkSubtitle( $this->title );
    }

    public static function isValidOldSpec( $oldimage ) {
        return strlen( $oldimage ) >= 16
            && strpos( $oldimage, '/' ) === false
            && strpos( $oldimage, '\\' ) === false;
    }

    public static function haveDeletableFile( &$file, &$oldfile, $oldimage ) {
        return $oldimage
            ? $oldfile && $oldfile->exists() && $oldfile->isLocal()
            : $file && $file->exists() && $file->isLocal();
    }

    private function getAction() {
        $q = [];
        $q['action'] = 'delete';

        if ( $this->oldimage ) {
            $q['oldimage'] = $this->oldimage;
        }

        return $this->title->getLocalURL( $q );
    }

    private function getTimestamp() {
        return $this->oldfile->getTimestamp();
    }
}