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83 lines
3.0 KiB
83 lines
3.0 KiB
"use strict";
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const EventEmitter = require("events");
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const util_1 = require("util");
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const adbCommander = require("adb-commander");
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const debugAdb = util_1.debuglog('adb');
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class ADBDevicesEmitter extends EventEmitter {
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constructor() {
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super(...arguments);
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this._stopFlag = false;
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this._builtinEvents = ['deviceAdded', 'deviceRemoved'];
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this._snList = [];
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}
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addEventListener(eventType, listener) {
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debugAdb(`addEventListener(): start for ${eventType}`);
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const idx = this._builtinEvents.indexOf(eventType);
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if (idx >= 0) {
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this.on(eventType, listener);
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}
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}
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start() {
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debugAdb(`start(): start`);
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this._stopFlag = false;
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this._execPolling(async (resolve) => {
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debugAdb(`execPolling(): callback start`);
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const { deviceList, err } = await adbCommander.deviceList();
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debugAdb(`execPolling():\nfound deviceList: ${JSON.stringify(deviceList)},\n_snList: ${JSON.stringify(this._snList)}`);
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if (err) {
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console.error(`adb-commander: adb获取手机设备失败`, JSON.stringify(err));
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return resolve(true);
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}
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const deviceListState = this._detectDeviceListChange(deviceList);
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debugAdb(`execPolling():\nnewlyAdded devices: ${JSON.stringify(deviceListState.newlyAdded)}\nremoved devices: ${JSON.stringify(deviceListState.removed)}`);
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deviceListState.newlyAdded.forEach(sn => {
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this.emit('deviceAdded', { sn });
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});
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deviceListState.removed.forEach(sn => {
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this.emit('deviceRemoved', { sn });
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});
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debugAdb(`execPolling(): go to next polling`);
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return resolve(true);
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});
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}
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stop() {
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this._stopFlag = true;
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}
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_detectDeviceListChange(currentList) {
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const result = {
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newlyAdded: [],
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removed: [],
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};
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result.newlyAdded = currentList.filter(item => {
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return this._snList.indexOf(item) < 0;
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});
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result.removed = this._snList.filter(item => {
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return currentList.indexOf(item) < 0;
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});
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this._snList = currentList;
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return result;
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}
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_execPolling(callback) {
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const delay = 5e3;
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const polling = () => {
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new Promise((res, rej) => {
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debugAdb(`execPolling(): promise def start`);
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callback.apply(this, [res, rej]);
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})
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.then(next => {
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next &&
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!this._stopFlag &&
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setTimeout(() => {
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debugAdb(`execPolling(): start polling again`);
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polling();
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}, delay);
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})
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.catch(err => {
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console.error(`adb-commander: 退出轮询: ${err.message}`);
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});
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};
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polling();
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}
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}
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const adbDevicesEmitter = new ADBDevicesEmitter();
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module.exports = adbDevicesEmitter;
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