energylink/public/app/core/components/user_picker.ts

import coreModule from 'app/core/core_module';
import appEvents from 'app/core/app_events';
import _ from 'lodash';

const template = `
<div class="dropdown">
  <metric-segment segment="ctrl.userSegment"
    get-options="ctrl.debouncedSearchUsers($query)"
    on-change="ctrl.onChange()"></metric-segment>
  </div>
`;
export class UserPickerCtrl {
  userSegment: any;
  userLogin: string;
  userId: number;
  debouncedSearchUsers: any;

  /** @ngInject */
  constructor(private backendSrv, private $scope, $sce, private uiSegmentSrv) {
    this.debouncedSearchUsers = _.debounce(this.searchUsers, 500, {'leading': true, 'trailing': false});
    this.resetUserSegment();
  }

  resetUserSegment() {
    this.userId = null;
    const userSegment = this.uiSegmentSrv.newSegment({
      value: 'Choose',
      selectMode: true,
      fake: true,
      cssClass: 'gf-size-auto'
    });

    if (!this.userSegment) {
      this.userSegment = userSegment;
    } else {
      this.userSegment.value = userSegment.value;
      this.userSegment.html = userSegment.html;
      this.userSegment.value = userSegment.value;
    }
  }

  searchUsers(query: string) {
    return Promise.resolve(this.backendSrv.get('/api/users/search?perpage=10&page=1&query=' + query).then(result => {
      return _.map(result.users, this.userKey.bind(this));
    }));
  }

  onChange() {
    this.userLogin = this.userSegment.value.split(' - ')[0];

    this.backendSrv.get('/api/users/search?perpage=10&page=1&query=' + this.userLogin)
      .then(result => {
        if (!result) {
          return;
        }

        result.users.forEach(u => {
          if (u.login === this.userLogin) {
            this.userId = u.id;
          }
        });
    });
  }

  userIdChanged(newVal) {
    if (!newVal) {
      this.resetUserSegment();
    }
  }

  private userKey(user: User) {
    return this.uiSegmentSrv.newSegment(user.login + ' - ' + user.email);
  }

}

export interface User {
  id: number;
  name: string;
  login: string;
  email: string;
}

export function userPicker() {
  return {
    restrict: 'E',
    template: template,
    controller: UserPickerCtrl,
    bindToController: true,
    controllerAs: 'ctrl',
    scope: {
      userId: '=',
    },
    link: function(scope, elem, attrs, ctrl) {
      scope.$watch("ctrl.userId", (newVal, oldVal) => {
        ctrl.userIdChanged(newVal);
      });
    }
  };
}

coreModule.directive('userPicker', userPicker);