added feature to hide element based on write_permission attribute

csis_helpers.libraries.yml

@@ -87,3 +87,13 @@ update_step_relations:
     - core/drupal
     - core/drupal.ajax
     - core/drupalSettings
+
+permission_control:
+  js:
+    js/csis_permission_control.js:
+  dependencies:
+    - core/jquery
+    - core/jquery.once
+    - core/drupal
+    - core/drupal.ajax
+    - core/drupalSettings

csis_helpers.module

@@ -72,6 +72,7 @@ function csis_helpers_group_view(array &$build, EntityInterface $entity, EntityV
   // DEPRECATED: use studyInfo/datapackageInfo/resourceInfo instead!
   $build['#attached']['drupalSettings']['csisHelpers']['entityinfo'] = csis_helpers_group_entity_info($entity);
   $build['#attached']['library'][] = 'csis_helpers/entityinfo_helpers';
+  $build['#attached']['library'][] = 'csis_helpers/permission_control';
 
   $build['#attached']['drupalSettings']['csisHelpers']['studyInfo'] = csis_helpers_group_entity_info($entity);
 }

js/csis_permission_control.js

@@ -0,0 +1,27 @@
+(function ($, Drupal, drupalSettings) {
+
+  if (!drupalSettings.csisHelpers) {
+    return;
+  }
+
+  Drupal.behaviors.csis_permission_control = {
+    attach: function (context, settings) {
+      // search for all elements containing that class (will be buttons or links)
+      $('.token-field-check-permissions', context).once('checkPermissions').each(function () {
+        //console.debug('checking permissions');
+
+        // get write permissions for current user based on their role in the group
+        var writePermissions = drupalSettings.csisHelpers.studyInfo.write_permissions
+
+        // if user can't write to this group/node then hide the element
+        // hiding is in this case enough since Drupal itself will also check permissions
+        // when a form is called and block users without necessary permissions
+        if (writePermissions == 0) {
+          $(this).hide();
+        }
+
+      });
+    }
+  };
+})(jQuery, Drupal, drupalSettings);
+