discourse/app/assets/javascripts/discourse/controllers/bulk-notification-level.js.es6

import computed from 'ember-addons/ember-computed-decorators';
import { topicLevels } from 'discourse/lib/notification-levels';

// Support for changing the notification level of various topics
export default Ember.Controller.extend({
  needs: ['topic-bulk-actions'],
  notificationLevelId: null,

  @computed
  notificationLevels() {
    return topicLevels.map(level => {
      return {
        id: level.id.toString(),
        name: I18n.t(`topic.notifications.${level.key}.title`),
        description: I18n.t(`topic.notifications.${level.key}.description`)
      };
    });
  },

  disabled: Em.computed.empty("notificationLevelId"),

  actions: {
    changeNotificationLevel() {
      this.get('controllers.topic-bulk-actions').performAndRefresh({
        type: 'change_notification_level',
        notification_level_id: this.get('notificationLevelId')
      });
    }
  }
});