text: /* global Flash */
  
  import Service from './services/sidebar_service';
  import Store from './stores/sidebar_store';
  
  export default class SidebarMediator {
    constructor(options) {
      if (!SidebarMediator.singleton) {
        this.store = new Store(options);
        this.service = new Service(options.endpoint);
        SidebarMediator.singleton = this;
      }
  
      return SidebarMediator.singleton;
    }
  
    assignYourself() {
      this.store.addAssignee(this.store.currentUser);
    }
  
    saveAssignees(field) {
      const selected = this.store.assignees.map(u => u.id);
  
      // If there are no ids, that means we have to unassign (which is id = 0)
      // And it only accepts an array, hence [0]
      return this.service.update(field, selected.length === 0 ? [0] : selected);
    }
  
    fetch() {
      this.service.get()
        .then((response) => {
          const data = response.json();
          this.store.setAssigneeData(data);
          this.store.setTimeTrackingData(data);
        })
        .catch(() => new Flash('Error occured when fetching sidebar data'));
    }
  }
  