applet/dever/package/audio.js

var Audio = {
  //音乐列表
  list: [],
  //音频管理器
  manage: false,
  //当前播放第几首
  current: 0,
  //是否正在播放
  running: false,
  //是否绑定播放进度更新事件
  bindProcess: false,
  //绑定的主事件
  obj:false,
  //最大秒数
  max:0,
  loading:false,

  init: function (obj) {
    if (this.manage) {
      return
    }
    if (obj) {
      this.obj = obj
    }
    
    this.setRunning(false)
    var audio = wx.getStorageSync('audioaudo')
    if (!audio) {
      audio = wx.getBackgroundAudioManager()
      wx.setStorageSync('audio', audio)
    }
    this.manage = audio
    this.manage.stop()
  }

  , add: function (data) {
    this.list.push(data)
  }

  , play: function (index) {
    this.init()
    if (!index) {
      index = 0
    }
    if (this.loading == false) {
      this.current = index
      var data = this.list[index]
      this.setManageAttr(data)
    } else {
      this.manage.play()
    }
    
    this.setRunning(true)
    return this.running
  }

  , pause: function () {
    this.init()
    this.manage.pause()
    this.setRunning(false)
  }

  , stop: function () {
    this.init()
    this.manage.stop()
    this.setRunning(false)
  }

  , setRunning: function (value) {
    this.running = value
    wx.setStorageSync('audoRunning', this.running)
    if (this.obj) {
      this.obj.setData({
        audioRunning: this.running
      })
    }
  }

  , getManage: function () {
    this.init()
    return this.manage
  }

  //跳转播放到多少秒
  , seek: function (value) {
    this.init()
    this.manage.seek(this.duration() * value)
  }

  //根据百分比值，计算总秒数
  , duration: function () {
    this.init()
    return this.manage.duration / 100
  }

  //根据当前秒数，计算当前进度
  , currentTime: function () {
    this.init()
    if (this.manage.currentTime >= this.manage.duration) {
      return 100
    }
    return (this.manage.currentTime / this.manage.duration) * 100
  }

  //播放进度更新
  , process: function () {
    this.init()
    if (!this.obj) {
      return
    }
    var that = this
    this.manage.onTimeUpdate(function () {
      var cur = that.currentTime()
      if (cur >= 100) {
        cur = 0
        that.running = false
      }

      if (that.max <= 0) {
        that.max = that.manage.duration
      }
      
      that.obj.setData({
        audioProcess: cur,
        audioCurTime: that.time(that.manage.currentTime),
        audioTotalTime: that.time(that.max)
      })
    })
    this.bindProcess = true
  }

  , setManageAttr : function (data) {
    this.loading = true
    this.manage.title = data.title
    this.manage.epname = data.epname
    this.manage.singer = data.singer
    this.manage.coverImgUrl = data.coverImgUrl
    this.manage.src = data.src
    this.setOn()
  }

  , time : function(value) {
    var secondTime = parseInt(value);// 秒
    var minuteTime = 0;// 分
    var hourTime = 0;// 小时
    if (secondTime > 60) {//如果秒数大于60，将秒数转换成整数
      //获取分钟，除以60取整数，得到整数分钟
      minuteTime = parseInt(secondTime / 60);
      //获取秒数，秒数取佘，得到整数秒数
      secondTime = parseInt(secondTime % 60);
    }
    if (secondTime < 10) {
      secondTime = '0' + secondTime
    }
    var result = "" + secondTime + "";

    if (minuteTime > 0) {
      if (minuteTime < 10) {
        minuteTime = '0' + minuteTime
      }
      result = "" + minuteTime + ":" + result;
    } else {
      result = "00:" + result;
    }

    return result
  }

  , setOn : function () {
    var that = this
    this.manage.onPause(function () {
      that.setRunning(false)
    })

    this.manage.onStop(function () {
      that.loading = false
      that.setRunning(false)
    })

    this.manage.onPlay(function () {
      that.loading = true
      that.setRunning(true)
    })

    this.manage.onEnded(function () {
      that.loading = false
      that.setRunning(false)
    })
  }
}

module.exports = {
  load: Audio
}