152 lines
4.2 KiB
TypeScript
152 lines
4.2 KiB
TypeScript
export interface LocationUpdate {
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latitude: number
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longitude: number
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accuracy?: number
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speed?: number
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}
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export interface LocationControllerCallbacks {
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onLocation: (update: LocationUpdate) => void
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onStatus: (message: string) => void
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onError: (message: string) => void
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}
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function hasLocationPermission(settings: WechatMiniprogram.AuthSetting): boolean {
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const authSettings = settings as Record<string, boolean | undefined>
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return !!authSettings['scope.userLocation']
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}
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function hasBackgroundLocationPermission(settings: WechatMiniprogram.AuthSetting): boolean {
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const authSettings = settings as Record<string, boolean | undefined>
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return !!authSettings['scope.userLocationBackground']
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}
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export class LocationController {
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callbacks: LocationControllerCallbacks
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listening: boolean
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boundLocationHandler: ((result: WechatMiniprogram.OnLocationChangeCallbackResult) => void) | null
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constructor(callbacks: LocationControllerCallbacks) {
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this.callbacks = callbacks
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this.listening = false
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this.boundLocationHandler = null
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}
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start(): void {
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if (this.listening) {
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this.callbacks.onStatus('后台持续定位进行中')
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return
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}
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wx.getSetting({
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success: (result) => {
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const settings = result.authSetting || {}
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if (hasBackgroundLocationPermission(settings)) {
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this.startBackgroundLocation()
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return
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}
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if (hasLocationPermission(settings)) {
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this.requestBackgroundPermissionInSettings()
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return
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}
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wx.authorize({
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scope: 'scope.userLocation',
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success: () => {
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this.requestBackgroundPermissionInSettings()
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},
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fail: () => {
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this.requestBackgroundPermissionInSettings()
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},
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})
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},
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fail: (error) => {
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const message = error && error.errMsg ? error.errMsg : 'getSetting 失败'
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this.callbacks.onError(`GPS授权检查失败: ${message}`)
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},
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})
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}
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requestBackgroundPermissionInSettings(): void {
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this.callbacks.onStatus('请在授权面板开启后台定位')
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wx.openSetting({
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success: (result) => {
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const settings = result.authSetting || {}
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if (hasBackgroundLocationPermission(settings)) {
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this.startBackgroundLocation()
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return
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}
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this.callbacks.onError('GPS启动失败: 未授予后台定位权限')
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},
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fail: (error) => {
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const message = error && error.errMsg ? error.errMsg : 'openSetting 失败'
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this.callbacks.onError(`GPS启动失败: ${message}`)
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},
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})
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}
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startBackgroundLocation(): void {
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wx.startLocationUpdateBackground({
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success: () => {
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this.bindLocationListener()
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this.listening = true
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this.callbacks.onStatus('后台持续定位已启动')
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},
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fail: (error) => {
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const message = error && error.errMsg ? error.errMsg : 'startLocationUpdateBackground 失败'
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this.callbacks.onError(`GPS启动失败: ${message}`)
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},
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})
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}
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stop(): void {
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if (!this.listening) {
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this.callbacks.onStatus('后台持续定位未启动')
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return
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}
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if (typeof wx.offLocationChange === 'function' && this.boundLocationHandler) {
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wx.offLocationChange(this.boundLocationHandler)
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}
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this.boundLocationHandler = null
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wx.stopLocationUpdate({
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complete: () => {
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this.listening = false
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this.callbacks.onStatus('后台持续定位已停止')
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},
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})
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}
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destroy(): void {
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if (typeof wx.offLocationChange === 'function' && this.boundLocationHandler) {
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wx.offLocationChange(this.boundLocationHandler)
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}
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this.boundLocationHandler = null
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if (this.listening) {
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wx.stopLocationUpdate({ complete: () => {} })
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this.listening = false
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}
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}
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bindLocationListener(): void {
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if (this.boundLocationHandler) {
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return
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}
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this.boundLocationHandler = (result) => {
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this.callbacks.onLocation({
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latitude: result.latitude,
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longitude: result.longitude,
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accuracy: result.accuracy,
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speed: result.speed,
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})
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}
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wx.onLocationChange(this.boundLocationHandler)
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}
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}
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