SpecialChangeContentModel.php

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<?php
 
use MediaWiki\Content\IContentHandlerFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\SlotRecord;
 
class SpecialChangeContentModel extends FormSpecialPage {
 
    private $contentHandlerFactory;
 
    public function __construct( ?IContentHandlerFactory $contentHandlerFactory = null ) {
        parent::__construct( 'ChangeContentModel', 'editcontentmodel' );
 
        if ( !$contentHandlerFactory ) {
            wfDeprecated( __METHOD__ . ' without $contentHandlerFactory parameter', '1.35' );
            $contentHandlerFactory = MediaWikiServices::getInstance()->getContentHandlerFactory();
        }
        $this->contentHandlerFactory = $contentHandlerFactory;
    }
 
    public function doesWrites() {
        return true;
    }
 
    private $title;
 
    private $oldRevision;
 
    protected function setParameter( $par ) {
        $par = $this->getRequest()->getVal( 'pagetitle', $par );
        $title = Title::newFromText( $par );
        if ( $title ) {
            $this->title = $title;
            $this->par = $title->getPrefixedText();
        } else {
            $this->par = '';
        }
    }
 
    protected function postText() {
        $text = '';
        if ( $this->title ) {
            $contentModelLogPage = new LogPage( 'contentmodel' );
            $text = Xml::element( 'h2', null, $contentModelLogPage->getName()->text() );
            $out = '';
            LogEventsList::showLogExtract( $out, 'contentmodel', $this->title );
            $text .= $out;
        }
        return $text;
    }
 
    protected function getDisplayFormat() {
        return 'ooui';
    }
 
    protected function alterForm( HTMLForm $form ) {
        $this->addHelpLink( 'Help:ChangeContentModel' );
 
        if ( $this->title ) {
            $form->setFormIdentifier( 'modelform' );
        } else {
            $form->setFormIdentifier( 'titleform' );
        }
 
        // T120576
        $form->setSubmitTextMsg( 'changecontentmodel-submit' );
 
        if ( $this->title ) {
            $this->getOutput()->addBacklinkSubtitle( $this->title );
        }
    }
 
    public function validateTitle( $title ) {
        // Already validated by HTMLForm, but if not, throw
        // an exception instead of a fatal
        $titleObj = Title::newFromTextThrow( $title );
 
        $this->oldRevision = MediaWikiServices::getInstance()
            ->getRevisionLookup()
            ->getRevisionByTitle( $titleObj ) ?: false;
 
        if ( $this->oldRevision ) {
            $oldContent = $this->oldRevision->getContent( SlotRecord::MAIN );
            if ( !$oldContent->getContentHandler()->supportsDirectEditing() ) {
                return $this->msg( 'changecontentmodel-nodirectediting' )
                    ->params( ContentHandler::getLocalizedName( $oldContent->getModel() ) )
                    ->escaped();
            }
        }
 
        return true;
    }
 
    protected function getFormFields() {
        $fields = [
            'pagetitle' => [
                'type' => 'title',
                'creatable' => true,
                'name' => 'pagetitle',
                'default' => $this->par,
                'label-message' => 'changecontentmodel-title-label',
                'validation-callback' => [ $this, 'validateTitle' ],
            ],
        ];
        if ( $this->title ) {
            $spamChecker = MediaWikiServices::getInstance()->getSpamChecker();
 
            $options = $this->getOptionsForTitle( $this->title );
            if ( empty( $options ) ) {
                throw new ErrorPageError(
                    'changecontentmodel-emptymodels-title',
                    'changecontentmodel-emptymodels-text',
                    [ $this->title->getPrefixedText() ]
                );
            }
            $fields['pagetitle']['readonly'] = true;
            $fields += [
                'currentmodel' => [
                    'type' => 'text',
                    'name' => 'currentcontentmodel',
                    'default' => $this->title->getContentModel(),
                    'label-message' => 'changecontentmodel-current-label',
                    'readonly' => true
                ],
                'model' => [
                    'type' => 'select',
                    'name' => 'model',
                    'options' => $options,
                    'label-message' => 'changecontentmodel-model-label'
                ],
                'reason' => [
                    'type' => 'text',
                    'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
                    'name' => 'reason',
                    'validation-callback' => function ( $reason ) use ( $spamChecker ) {
                        if ( $reason === null || $reason === '' ) {
                            // Null on form display, or no reason given
                            return true;
                        }
 
                        $match = $spamChecker->checkSummary( $reason );
 
                        if ( $match ) {
                            return $this->msg( 'spamprotectionmatch', $match )->parse();
                        }
 
                        return true;
                    },
                    'label-message' => 'changecontentmodel-reason-label',
                ],
            ];
        }
 
        return $fields;
    }
 
    private function getOptionsForTitle( Title $title = null ) {
        $models = $this->contentHandlerFactory->getContentModels();
        $options = [];
        foreach ( $models as $model ) {
            $handler = $this->contentHandlerFactory->getContentHandler( $model );
            if ( !$handler->supportsDirectEditing() ) {
                continue;
            }
            if ( $title ) {
                if ( $title->getContentModel() === $model ) {
                    continue;
                }
                if ( !$handler->canBeUsedOn( $title ) ) {
                    continue;
                }
            }
            $options[ContentHandler::getLocalizedName( $model )] = $model;
        }
 
        return $options;
    }
 
    public function onSubmit( array $data ) {
        $user = $this->getUser();
        $this->title = Title::newFromText( $data['pagetitle'] );
        $page = WikiPage::factory( $this->title );
 
        $changer = MediaWikiServices::getInstance()
            ->getContentModelChangeFactory()
            ->newContentModelChange(
                $user,
                $page,
                $data['model']
            );
 
        $errors = $changer->checkPermissions();
        if ( $errors ) {
            $out = $this->getOutput();
            $wikitext = $out->formatPermissionsErrorMessage( $errors );
            // Hack to get our wikitext parsed
            return Status::newFatal( new RawMessage( '$1', [ $wikitext ] ) );
        }
 
        // Can also throw a ThrottledError, don't catch it
        $status = $changer->doContentModelChange(
            $this->getContext(),
            $data['reason'],
            true
        );
 
        return $status;
    }
 
    public function onSuccess() {
        $out = $this->getOutput();
        $out->setPageTitle( $this->msg( 'changecontentmodel-success-title' ) );
        $out->addWikiMsg( 'changecontentmodel-success-text', $this->title );
    }
 
    public function prefixSearchSubpages( $search, $limit, $offset ) {
        return $this->prefixSearchString( $search, $limit, $offset );
    }
 
    protected function getGroupName() {
        return 'pagetools';
    }
}