Validate for unsubscribe link only for MSS sending method [MAILPOET-1050]

lib/Config/Menu.php

@@ -541,7 +541,8 @@ class Menu {
       'shortcodes' => ShortcodesHelper::getShortcodes(),
       'settings' => Setting::getAll(),
       'current_wp_user' => Subscriber::getCurrentWPUser(),
-      'sub_menu' => self::MAIN_PAGE_SLUG
+      'sub_menu' => self::MAIN_PAGE_SLUG,
+      'mss_active' => Bridge::isMPSendingServiceEnabled()
     );
     wp_enqueue_media();
     wp_enqueue_script('tinymce-wplink', includes_url('js/tinymce/plugins/wplink/plugin.js'));

views/newsletter/editor.html

@@ -1200,7 +1200,7 @@
         height: '768px'
       },
       validation: {
-        validateUnsubscribeLinkPresent: true, // TODO: Add validation based on whether Mailpoet MTA is used or not
+        validateUnsubscribeLinkPresent: <%= mss_active ? 'true' : 'false' %>,
       },
       urls: {
         send: '<%= admin_url('admin.php?page=mailpoet-newsletters#/send/' ~ (params('id') | intval)) %>',