feat: app-plus uni.createInnerAudioContext

feat: app-plus uni.createInnerAudioContext

src/core/service/api/context/audio.js

+import {
+  onMethod,
+  invokeMethod
+} from '../../platform'
+
+const eventNames = [
+  'canplay',
+  'play',
+  'pause',
+  'stop',
+  'ended',
+  'timeupdate',
+  'error',
+  'waiting',
+  'seeking',
+  'seeked'
+]
+
+const props = [
+  {
+    name: 'src',
+    cache: true
+  },
+  {
+    name: 'startTime',
+    default: 0,
+    cache: true
+  },
+  {
+    name: 'autoplay',
+    default: false,
+    cache: true
+  },
+  {
+    name: 'loop',
+    default: false,
+    cache: true
+  },
+  {
+    name: 'obeyMuteSwitch',
+    default: true,
+    readonly: true,
+    cache: true
+  },
+  {
+    name: 'duration',
+    readonly: true
+  },
+  {
+    name: 'currentTime',
+    readonly: true
+  },
+  {
+    name: 'paused',
+    readonly: true
+  },
+  {
+    name: 'buffered',
+    readonly: true
+  },
+  {
+    name: 'volume'
+  }
+]
+
+class InnerAudioContext {
+  constructor (id) {
+    this.id = id
+    this._callbacks = {}
+    this._options = {}
+    eventNames.forEach(name => {
+      this._callbacks[name] = []
+    })
+    props.forEach(item => {
+      const name = item.name
+      const data = {
+        get () {
+          const result = item.cache ? this._options : invokeMethod('getAudioState', {
+            audioId: this.id
+          })
+          const value = name in result ? result[name] : item.default
+          return typeof value === 'number' && name !== 'volume' ? value / 1e3 : value
+        }
+      }
+      if (!item.readonly) {
+        data.set = function (value) {
+          this._options[name] = value
+          invokeMethod('setAudioState', Object.assign({}, this._options, {
+            audioId: this.id
+          }))
+        }
+      }
+      Object.defineProperty(this, name, data)
+    })
+  }
+  play () {
+    this._operate('play')
+  }
+  pause () {
+    this._operate('pause')
+  }
+  stop () {
+    this._operate('stop')
+  }
+  seek (position) {
+    this._operate('play', {
+      currentTime: position
+    })
+  }
+  destroy () {
+    invokeMethod('destroyAudioInstance', {
+      audioId: this.id
+    })
+    delete innerAudioContexts[this.id]
+  }
+  _operate (type, options) {
+    invokeMethod('operateAudio', Object.assign({}, options, {
+      audioId: this.id,
+      operationType: type
+    }))
+  }
+}
+
+eventNames.forEach(item => {
+  const name = item[0].toUpperCase() + item.substr(1)
+  InnerAudioContext.prototype[`on${name}`] = function (callback) {
+    this._callbacks[item].push(callback)
+  }
+  InnerAudioContext.prototype[`off${name}`] = function (callback) {
+    const callbacks = this._callbacks[item]
+    const index = callbacks.indexOf(callback)
+    if (index >= 0) {
+      callbacks.splice(index, 1)
+    }
+  }
+})
+
+onMethod('onAudioStateChange', ({
+  state,
+  audioId,
+  errMsg,
+  errCode
+}) => {
+  const audio = innerAudioContexts[audioId]
+  audio && audio._callbacks[state].forEach(callback => {
+    if (typeof callback === 'function') {
+      callback(state === 'error' ? {
+        errMsg,
+        errCode
+      } : {})
+    }
+  })
+})
+
+const innerAudioContexts = Object.create(null)
+
+export function createInnerAudioContext () {
+  const {
+    audioId
+  } = invokeMethod('createAudioInstance')
+  const innerAudioContext = new InnerAudioContext(audioId)
+  innerAudioContexts[audioId] = innerAudioContext
+  return innerAudioContext
+}