Refine sensor integration strategy

miniprogram/engine/sensor/deviceMotionController.ts

@@ -0,0 +1,77 @@
+export interface DeviceMotionControllerCallbacks {
+  onSample: (alpha: number | null, beta: number | null, gamma: number | null) => void
+  onError: (message: string) => void
+}
+
+export class DeviceMotionController {
+  callbacks: DeviceMotionControllerCallbacks
+  listening: boolean
+  starting: boolean
+  motionCallback: ((result: WechatMiniprogram.OnDeviceMotionChangeCallbackResult) => void) | null
+
+  constructor(callbacks: DeviceMotionControllerCallbacks) {
+    this.callbacks = callbacks
+    this.listening = false
+    this.starting = false
+    this.motionCallback = null
+  }
+
+  start(): void {
+    if (this.listening || this.starting) {
+      return
+    }
+
+    if (typeof wx.startDeviceMotionListening !== 'function' || typeof wx.onDeviceMotionChange !== 'function') {
+      this.callbacks.onError('当前环境不支持设备方向监听')
+      return
+    }
+
+    const callback = (result: WechatMiniprogram.OnDeviceMotionChangeCallbackResult) => {
+      const alpha = typeof result.alpha === 'number' && !Number.isNaN(result.alpha) ? result.alpha : null
+      const beta = typeof result.beta === 'number' && !Number.isNaN(result.beta) ? result.beta : null
+      const gamma = typeof result.gamma === 'number' && !Number.isNaN(result.gamma) ? result.gamma : null
+      this.callbacks.onSample(alpha, beta, gamma)
+    }
+
+    this.motionCallback = callback
+    wx.onDeviceMotionChange(callback)
+    this.starting = true
+    wx.startDeviceMotionListening({
+      interval: 'game',
+      success: () => {
+        this.starting = false
+        this.listening = true
+      },
+      fail: (res) => {
+        this.starting = false
+        this.detachCallback()
+        this.callbacks.onError(res && res.errMsg ? res.errMsg : 'startDeviceMotionListening failed')
+      },
+    })
+  }
+
+  stop(): void {
+    this.detachCallback()
+    wx.stopDeviceMotionListening({
+      complete: () => {},
+    })
+    this.starting = false
+    this.listening = false
+  }
+
+  destroy(): void {
+    this.stop()
+  }
+
+  private detachCallback(): void {
+    if (!this.motionCallback) {
+      return
+    }
+
+    if (typeof wx.offDeviceMotionChange === 'function') {
+      wx.offDeviceMotionChange(this.motionCallback)
+    }
+
+    this.motionCallback = null
+  }
+}