1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
const EventEmitter = require('events')
function getTimeStrings({curHour, curMin, curSec, lenHour, lenMin, lenSec}) {
// Multiplication casts to numbers; addition prioritizes strings.
// Thanks, JavaScript!
const curSecTotal = (3600 * curHour) + (60 * curMin) + (1 * curSec)
const lenSecTotal = (3600 * lenHour) + (60 * lenMin) + (1 * lenSec)
const percentVal = (100 / lenSecTotal) * curSecTotal
const percentDone = (
(Math.trunc(percentVal * 100) / 100).toFixed(2) + '%'
)
const leftSecTotal = lenSecTotal - curSecTotal
let leftHour = Math.floor(leftSecTotal / 3600)
let leftMin = Math.floor((leftSecTotal - leftHour * 3600) / 60)
let leftSec = Math.floor(leftSecTotal - leftHour * 3600 - leftMin * 60)
const pad = val => val.toString().padStart(2, '0')
curMin = pad(curMin)
curSec = pad(curSec)
lenMin = pad(lenMin)
lenSec = pad(lenSec)
leftMin = pad(leftMin)
leftSec = pad(leftSec)
// We don't want to display hour counters if the total length is less
// than an hour.
let timeDone, timeLeft, duration
if (parseInt(lenHour) > 0) {
timeDone = `${curHour}:${curMin}:${curSec}`
timeLeft = `${leftHour}:${leftMin}:${leftSec}`
duration = `${lenHour}:${lenMin}:${lenSec}`
} else {
timeDone = `${curMin}:${curSec}`
timeLeft = `${leftMin}:${leftSec}`
duration = `${lenMin}:${lenSec}`
}
return {percentDone, timeDone, timeLeft, duration, curSecTotal, lenSecTotal}
}
class Player extends EventEmitter {
constructor() {
super()
this.disablePlaybackStatus = false
}
playFile(file) {}
seekAhead(secs) {}
seekBack(secs) {}
volUp(amount) {}
volDown(amount) {}
togglePause() {}
async kill() {}
printStatusLine(data) {
// Quick sanity check - we don't want to print the status line if it's
// disabled! Hopefully printStatusLine won't be called in that case, but
// if it is, we should be careful.
if (!this.disablePlaybackStatus) {
this.emit('printStatusLine', data)
}
}
}
module.exports.WebPlayer = class extends Player {
constructor() {
super()
const secToMore = time => ({
hour: Math.floor(time / 3600),
min: Math.floor((time % 3600) / 60),
sec: Math.floor(time % 60)
})
setInterval(() => {
if (!this.audioEl) return
const { hour: curHour, min: curMin, sec: curSec } = secToMore(this.audioEl.currentTime)
const { hour: lenHour, min: lenMin, sec: lenSec } = secToMore(this.audioEl.duration)
this.printStatusLine(getTimeStrings({
curHour, curMin, curSec,
lenHour, lenMin, lenSec
}))
}, 50)
}
playFile(file) {
this.audioEl = document.createElement('audio')
this.audioEl.src = file
this.audioEl.play()
return Promise.race([
new Promise(resolve => this.stopPromise = resolve),
new Promise(resolve => {
const handleEnded = () => {
this.audioEl.removeEventListener('ended', handleEnded)
resolve()
}
this.audioEl.addEventListener('ended', handleEnded)
})
])
}
seekAhead(secs) {
if (!this.audioEl) return
this.audioEl.currentTime += secs
}
seekBack(secs) {
if (!this.audioEl) return
this.audioEl.currentTime -= secs
}
togglePause() {
if (!this.audioEl) return
if (this.audioEl.paused) {
this.audioEl.play()
} else {
this.audioEl.pause()
}
}
kill() {
if (!this.audioEl) return
this.audioEl.currentTime = 0
this.audioEl.pause()
if (this.stopPromise) {
this.stopPromise()
}
delete this.audioEl
}
}
module.exports.getPlayer = async function() {
return new module.exports.WebPlayer()
}
|
