Add mock GPS simulator and configurable location sources

miniprogram/engine/sensor/mockLocationSource.ts

@@ -0,0 +1,51 @@
+import { type LocationSample, type LocationSource, type LocationSourceCallbacks } from './locationSource'
+
+export class MockLocationSource implements LocationSource {
+  callbacks: LocationSourceCallbacks
+  active: boolean
+  lastSample: LocationSample | null
+
+  constructor(callbacks: LocationSourceCallbacks) {
+    this.callbacks = callbacks
+    this.active = false
+    this.lastSample = null
+  }
+
+  get mode(): 'mock' {
+    return 'mock'
+  }
+
+  start(): void {
+    if (this.active) {
+      this.callbacks.onStatus('模拟定位进行中')
+      return
+    }
+
+    this.active = true
+    this.callbacks.onStatus('模拟定位已启动，等待外部输入')
+  }
+
+  stop(): void {
+    if (!this.active) {
+      this.callbacks.onStatus('模拟定位未启动')
+      return
+    }
+
+    this.active = false
+    this.callbacks.onStatus('模拟定位已停止')
+  }
+
+  destroy(): void {
+    this.active = false
+    this.lastSample = null
+  }
+
+  pushSample(sample: LocationSample): void {
+    this.lastSample = sample
+    if (!this.active) {
+      return
+    }
+
+    this.callbacks.onLocation(sample)
+  }
+}