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1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16import worker from '@ohos.worker'
17
18import { Log } from '../utils/Log'
19import { Constants } from '../utils/Constants'
20import { EventBus } from './eventbus/EventBus'
21import { EventBusManager } from './eventbus/EventBusManager'
22
23export interface Message {
24  type: string,
25  data: any
26}
27
28export class AsyncManager {
29  private static TAG = '[AsyncManager]:'
30  private workerName: string
31  private workerUri: string
32  protected mWorker: any
33  private appEventBus: EventBus = EventBusManager.getWorkerInstance().getEventBus()
34  private _appEventBus: EventBus = EventBusManager.getCameraInstance().getEventBus()
35
36  constructor() {
37    // todo 此处暂时只考虑了一个worker，后续改造支持多个worker创建
38    this.workerName = 'AsyncManager'
39    this.workerUri = 'workers/CameraWorker.js'
40    this.initWorker()
41  }
42
43  public static getInstance(): AsyncManager {
44    if (!AppStorage.Has(Constants.APP_KEY_ASYNC_MANAGER)) {
45      AppStorage.SetOrCreate(Constants.APP_KEY_ASYNC_MANAGER, new AsyncManager())
46      Log.info(`${this.TAG} build new AsyncManager.`)
47    }
48    return AppStorage.Get(Constants.APP_KEY_ASYNC_MANAGER)
49  }
50
51  //todo 预留实现，待能力稳定后开放
52  //  private initWorker(): void {
53  //    this.mWorker = new worker.Worker(this.workerUri, {type: 'classic', name: this.workerName})
54  //    Log.info(`${AsyncManager.TAG} build the worker.`)
55  //    this.mWorker.onmessage = (...args) => {
56  //      Log.info(`${AsyncManager.TAG} mWorker.onmessage`)
57  //      this.onMessage(args[0].data)
58  //    }
59  //    this.mWorker.onmessageerror = this.onmessageerror.bind(this)
60  //    this.mWorker.onerror = this.onerror.bind(this)
61  //    this.mWorker.onexit = this.onexit.bind(this)
62  //  }
63
64  private initWorker(): void {
65    this._appEventBus.on('WORKER_TO_MAIN', (...args) => {
66      Log.info(`${AsyncManager.TAG} mWorker.onmessage`)
67      this.onMessage(args[0])
68    })
69  }
70
71  //todo 预留实现，待能力稳定后开放
72  //  // 向worker线程发送消息
73  //  public postMessage(msg: any): AsyncManager {
74  //    this.mWorker.postMessage(msg)
75  //    return this
76  //  }
77
78  // 向worker线程发送消息
79  public postMessage(msg: Message): void {
80    Log.info(`${AsyncManager.TAG} postMessage`)
81    this.appEventBus.emit('MAIN_TO_WORKER', [msg])
82  }
83
84  // 接收worker线程返回的UiData
85  public onMessage(msg: Message): void {
86    Log.info(`${AsyncManager.TAG} onMessage uidata: ${JSON.stringify(msg.data)}`)
87  }
88
89  public onmessageerror(msg: Message): void {
90
91  }
92
93  public onerror(msg: Message): void {
94
95  }
96
97  public onexit(msg: Message): void {
98
99  }
100}