ProtectedTagEdit class for edit protected tags

app/assets/javascripts/protected_tags/protected_tag_edit.js

+/* eslint-disable no-new, arrow-parens, no-param-reassign, comma-dangle, max-len */
+/* global Flash */
+
+(global => {
+  global.gl = global.gl || {};
+
+  gl.ProtectedTagEdit = class {
+    constructor(options) {
+      this.$wrap = options.$wrap;
+      this.$allowedToPushDropdown = this.$wrap.find('.js-allowed-to-push');
+
+      this.buildDropdowns();
+    }
+
+    buildDropdowns() {
+      // Allowed to push dropdown
+      new gl.ProtectedTagAccessDropdown({
+        $dropdown: this.$allowedToPushDropdown,
+        data: gon.push_access_levels,
+        onSelect: this.onSelect.bind(this)
+      });
+    }
+
+    onSelect() {
+      const $allowedToPushInput = this.$wrap.find(`input[name="${this.$allowedToPushDropdown.data('fieldName')}"]`);
+
+      // Do not update if one dropdown has not selected any option
+      if (!$allowedToPushInput.length) return;
+
+      this.$allowedToPushDropdown.disable();
+
+      $.ajax({
+        type: 'POST',
+        url: this.$wrap.data('url'),
+        dataType: 'json',
+        data: {
+          _method: 'PATCH',
+          protected_tag: {
+            push_access_levels_attributes: [{
+              id: this.$allowedToPushDropdown.data('access-level-id'),
+              access_level: $allowedToPushInput.val()
+            }]
+          }
+        },
+        error() {
+          $.scrollTo(0);
+          new Flash('Failed to update tag!');
+        }
+      }).always(() => {
+        this.$allowedToPushDropdown.enable();
+      });
+    }
+  };
+})(window);