SpecialLockdb.php

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<?php
class SpecialLockdb extends FormSpecialPage {
    protected $reason = '';

    public function __construct() {
        parent::__construct( 'Lockdb', 'siteadmin' );
    }

    public function doesWrites() {
        return false;
    }

    public function requiresWrite() {
        return false;
    }

    public function checkExecutePermissions( User $user ) {
        parent::checkExecutePermissions( $user );
        # If the lock file isn't writable, we can do sweet bugger all
        if ( !is_writable( dirname( $this->getConfig()->get( 'ReadOnlyFile' ) ) ) ) {
            throw new ErrorPageError( 'lockdb', 'lockfilenotwritable' );
        }
        if ( file_exists( $this->getConfig()->get( 'ReadOnlyFile' ) ) ) {
            throw new ErrorPageError( 'lockdb', 'databaselocked' );
        }
    }

    protected function getFormFields() {
        return [
            'Reason' => [
                'type' => 'textarea',
                'rows' => 4,
                'vertical-label' => true,
                'label-message' => 'enterlockreason',
            ],
            'Confirm' => [
                'type' => 'toggle',
                'label-message' => 'lockconfirm',
            ],
        ];
    }

    protected function alterForm( HTMLForm $form ) {
        $form->setWrapperLegend( false )
            ->setHeaderText( $this->msg( 'lockdbtext' )->parseAsBlock() )
            ->setSubmitTextMsg( 'lockbtn' );
    }

    public function onSubmit( array $data ) {
        global $wgContLang;

        if ( !$data['Confirm'] ) {
            return Status::newFatal( 'locknoconfirm' );
        }

        MediaWiki\suppressWarnings();
        $fp = fopen( $this->getConfig()->get( 'ReadOnlyFile' ), 'w' );
        MediaWiki\restoreWarnings();

        if ( false === $fp ) {
            # This used to show a file not found error, but the likeliest reason for fopen()
            # to fail at this point is insufficient permission to write to the file...good old
            # is_writable() is plain wrong in some cases, it seems...
            return Status::newFatal( 'lockfilenotwritable' );
        }
        fwrite( $fp, $data['Reason'] );
        $timestamp = wfTimestampNow();
        fwrite( $fp, "\n<p>" . $this->msg( 'lockedbyandtime',
            $this->getUser()->getName(),
            $wgContLang->date( $timestamp, false, false ),
            $wgContLang->time( $timestamp, false, false )
        )->inContentLanguage()->text() . "</p>\n" );
        fclose( $fp );

        return Status::newGood();
    }

    public function onSuccess() {
        $out = $this->getOutput();
        $out->addSubtitle( $this->msg( 'lockdbsuccesssub' ) );
        $out->addWikiMsg( 'lockdbsuccesstext' );
    }

    protected function getDisplayFormat() {
        return 'ooui';
    }

    protected function getGroupName() {
        return 'wiki';
    }
}