src/main/resources/static/gr-messageoftheday-banner.js

/**
 * @license
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
(function() {
  'use strict';

  Polymer({
    is: 'gr-messageoftheday-banner',

    properties: {
      _message: Object,
      _hidden: {
        type: Boolean,
        value: true,
      },
    },

    attached() {
      this.plugin.restApi()
        .get(`/config/server/${this.plugin.getPluginName()}~message`)
        .then(message => {
          if (!message || !message.html) {
            return;
          }
          this._message = message;
          this._isHidden();
          this.$.message.innerHTML = this._message.html;
        });
    },

    _handleDismissMessage() {
      document.cookie =
        `msg-${this._message.id}=1; expires=${this._message.redisplay}`;
      this._hidden = true;
    },

    _isHidden() {
      this._hidden = window.util.getCookie(`msg-${this._message.id}`) === '1';
    },
  });
})();