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1/**
2 * @file Describe the file
3 * Copyright (c) 2023 Huawei Device Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17import commonEvent from '@ohos.commonEvent'
18
19import { Subscriber } from '@ohos/common/src/main/ets/subscriber/Subscriber'
20import { Log } from '@ohos/common/src/main/ets/utils/Log';
21
22import { runScheduleNextAlarm } from './AlertsProcessor'
23import { CommonEventConstants } from '../../commonevents/CommonEventConstants';
24
25const TAG = 'AlertsSubscriber';
26
27/**
28 * the Alerts Subscriber
29 *
30 * @since 2022-10-08
31 */
32export class AlertsSubscriber implements Subscriber {
33  // AlertsSubscriber 的单例
34  private static sInstance: AlertsSubscriber;
35
36  // AlertsSubscriber 持有的订阅者
37  private subscriber;
38
39  private constructor() {
40    this.subscriber;
41  }
42
43  /**
44   * 获取 AlertsSubscriber 的单例
45   */
46  public static getInstance() {
47    if (!AlertsSubscriber.sInstance) {
48      Log.log(TAG, 'call getInstance init');
49      AlertsSubscriber.sInstance = new AlertsSubscriber();
50    }
51    return AlertsSubscriber.sInstance;
52  }
53
54  /**
55   * 初始化 AlertsSubscriber 持有的 subscriber
56   */
57  public initSubscriber() {
58    if (this.subscriber === null || this.subscriber === undefined) {
59      AlertsSubscriber.sInstance.subscribe();
60    }
61  }
62
63  /**
64   * 订阅公共事件
65   */
66  subscribe() {
67    // 订阅的公共事件集合
68    var subscribeInfo = {
69      events: [CommonEventConstants.CHECK_NEXT_ALARM, CommonEventConstants.EVENT_REMINDER],
70    }
71
72    // 创建订阅对象
73    commonEvent.createSubscriber(subscribeInfo, (err, subscriber) => {
74      if (err?.code) {
75        Log.error(TAG, `CreateSubscriberCallBack err = ${JSON.stringify(err)}`);
76      } else {
77        this.subscriber = subscriber;
78        Log.info(TAG, "Create subscriber succeed");
79        if (this.subscriber != null) {
80          Log.info(TAG, "subscriber subscribe commonEvent");
81          commonEvent.subscribe(subscriber, (err, data) => {
82            if (err?.code) {
83              Log.error(TAG, `SubscribeCallBack err= ${JSON.stringify(err)}`);
84            } else {
85              Log.info(TAG, `SubscribeCallBack data= ${JSON.stringify(data)}`);
86              // 接到广播后，此处会被回调
87              runScheduleNextAlarm();
88            }
89          })
90        } else {
91          Log.info(TAG, "Need create subscriber");
92        }
93      }
94    })
95  }
96
97  /**
98   * 取消订阅公共事件
99   */
100  unSubscribe() {
101    if (this.subscriber != null) {
102      commonEvent.unsubscribe(this.subscriber, (err) => {
103        if (err?.code) {
104          Log.error(TAG, `UnsubscribeCallBack err= = ${JSON.stringify(err)}`);
105        } else {
106          Log.info(TAG, "Unsubscribe");
107          this.subscriber = null
108          Log.info(TAG, "Unsubscribe succeed");
109        }
110      })
111    }
112  }
113}
114