backup: snapshot before optimization

2026-06-04 16:25:43 +08:00
commit ff2700c067
47 changed files with 3332 additions and 0 deletions
@@ -0,0 +1,92 @@
+function Timer(options) {
+  options = options || {}
+  this.onTick = options.onTick || function () {}
+  this.onComplete = options.onComplete || function () {}
+
+  this._duration = 0
+  this._remaining = 0
+  this._elapsed = 0
+  this._startTime = 0
+  this._pausedTime = 0
+  this._intervalId = null
+  this._running = false
+  this._paused = false
+  this._completed = false
+}
+
+Timer.prototype.start = function (duration) {
+  this._duration = duration
+  this._remaining = duration
+  this._elapsed = 0
+  this._completed = false
+  this._running = true
+  this._paused = false
+  this._startTime = Date.now()
+  this._tick()
+  var self = this
+  this._intervalId = setInterval(function () { self._tick() }, 1000)
+}
+
+Timer.prototype.pause = function () {
+  if (!this._running || this._paused) return
+  this._paused = true
+  this._pausedTime = Date.now()
+  clearInterval(this._intervalId)
+  this._intervalId = null
+}
+
+Timer.prototype.resume = function () {
+  if (!this._running || !this._paused) return
+  this._startTime += Date.now() - this._pausedTime
+  this._paused = false
+  this._tick()
+  var self = this
+  this._intervalId = setInterval(function () { self._tick() }, 1000)
+}
+
+Timer.prototype.stop = function () {
+  this._running = false
+  this._paused = false
+  clearInterval(this._intervalId)
+  this._intervalId = null
+  return this._elapsed
+}
+
+Timer.prototype._tick = function () {
+  if (!this._running || this._paused) return
+  this._elapsed = Math.floor((Date.now() - this._startTime) / 1000)
+  this._remaining = Math.max(0, this._duration - this._elapsed)
+
+  this.onTick({
+    remaining: this._remaining,
+    elapsed: this._elapsed,
+    duration: this._duration
+  })
+
+  if (this._remaining <= 0 && !this._completed) {
+    this._completed = true
+    this.onComplete({ elapsed: this._elapsed, duration: this._duration })
+  }
+}
+
+Object.defineProperty(Timer.prototype, 'isRunning', {
+  get: function () { return this._running && !this._paused }
+})
+
+Object.defineProperty(Timer.prototype, 'isPaused', {
+  get: function () { return this._paused }
+})
+
+Object.defineProperty(Timer.prototype, 'isCompleted', {
+  get: function () { return this._completed }
+})
+
+Object.defineProperty(Timer.prototype, 'remaining', {
+  get: function () { return this._remaining }
+})
+
+Object.defineProperty(Timer.prototype, 'elapsed', {
+  get: function () { return this._elapsed }
+})
+
+module.exports = Timer