IssueEntryPublicationMetadataForm::fetch PHP Method

    function fetch($request)
    {
        $context = $request->getContext();
        $templateMgr = TemplateManager::getManager($request);
        $templateMgr->assign(array('submissionId' => $this->getSubmission()->getId(), 'stageId' => $this->getStageId(), 'formParams' => $this->getFormParams(), 'context' => $context));
        $journalSettingsDao = DAORegistry::getDAO('JournalSettingsDAO');
        $templateMgr->assign('issueOptions', $this->getIssueOptions($context));
        $publishedArticle = $this->getPublishedArticle();
        if ($publishedArticle) {
            $templateMgr->assign('publishedArticle', $publishedArticle);
            $issueDao = DAORegistry::getDAO('IssueDAO');
            $issue = $issueDao->getById($publishedArticle->getIssueId());
            if ($issue) {
                $templateMgr->assign('issueAccess', $issue->getAccessStatus());
                $templateMgr->assign('accessOptions', array(ARTICLE_ACCESS_ISSUE_DEFAULT => __('editor.issues.default'), ARTICLE_ACCESS_OPEN => __('editor.issues.open')));
            }
        }
        // include payment information
        // Set up required Payment Related Information
        import('classes.payment.ojs.OJSPaymentManager');
        $paymentManager = new OJSPaymentManager($request);
        $completedPaymentDao = DAORegistry::getDAO('OJSCompletedPaymentDAO');
        $publicationFeeEnabled = $paymentManager->publicationEnabled();
        $templateMgr->assign('publicationFeeEnabled', $publicationFeeEnabled);
        if ($publicationFeeEnabled) {
            $templateMgr->assign('publicationPayment', $completedPaymentDao->getPublicationCompletedPayment($context->getId(), $this->getSubission()->getId()));
        }
        $templateMgr->assign('submission', $this->getSubmission());
        return parent::fetch($request);
    }

 /**
  * Show the publication metadata form.
  * @param $request Request
  * @param $args array
  * @return JSONMessage JSON object
  */
 function publicationMetadata($args, $request)
 {
     import('controllers.tab.issueEntry.form.IssueEntryPublicationMetadataForm');
     $submission = $this->getSubmission();
     $stageId = $this->getStageId();
     $user = $request->getUser();
     $issueEntryPublicationMetadataForm = new IssueEntryPublicationMetadataForm($submission->getId(), $user->getId(), $stageId, array('displayedInContainer' => true));
     $issueEntryPublicationMetadataForm->initData();
     return new JSONMessage(true, $issueEntryPublicationMetadataForm->fetch($request));
 }