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miniprogram/pages/walking/walking.js
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226
miniprogram/pages/walking/walking.js
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// pages/walking/walking — 2/2b 遛狗中（进行/暂停同页）
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// 计时基于时间戳差值（切后台不丢，R5）；GPS 距离可选累计、按 stride 换算狗步（R3/R6）
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const { call } = require('../../utils/cloud.js');
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const store = require('../../utils/store.js');
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const { formatDuration } = require('../../utils/format.js');
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const { BASE_STRIDE, dogStepsFromMeters } = require('../../utils/dogStep.js');
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// 两点球面距离（米）
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function haversine(lat1, lon1, lat2, lon2) {
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const R = 6371000;
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const toRad = (d) => (d * Math.PI) / 180;
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const dLat = toRad(lat2 - lat1);
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const dLon = toRad(lon2 - lon1);
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const a = Math.sin(dLat / 2) ** 2 +
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Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) ** 2;
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return 2 * R * Math.asin(Math.sqrt(a));
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}
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Page({
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data: {
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status: 'idle', // idle | selecting | walking | paused
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timeText: '00:00',
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pooped: false,
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dogs: [],
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selectedIds: [],
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selectedMap: {}, // id→true：供 WXML 判断选中（WXML 表达式不能调用 indexOf）
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activeDogNames: '',
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showEndConfirm: false,
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gps: 'off', // off | on | denied
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distanceText: '—',
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stepsText: '—',
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},
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_timer: null,
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_locOn: false,
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_locCb: null,
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_lastPoint: null,
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_stride: 0.35,
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onLoad() {
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const dogs = store.getState().dogs || [];
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this.setData({ dogs });
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const session = store.getWalkSession();
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if (session) { this.resumeFrom(session); return; }
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if (dogs.length === 0) {
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wx.showToast({ title: '先添加一只狗狗', icon: 'none' });
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setTimeout(() => wx.navigateBack(), 1200);
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return;
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}
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if (dogs.length === 1) this.startSession([dogs[0]._id]);
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else {
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const def = store.getState().currentDogId || dogs[0]._id;
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this.setData({ status: 'selecting', selectedIds: [def], selectedMap: this.buildSelectMap([def]) });
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}
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},
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onUnload() { this.clearTimer(); this.stopLocation(); },
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// ===== 多狗选择 =====
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// WXML 表达式不支持方法调用（如 selectedIds.indexOf），用 id→true 映射给视图层判断选中
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buildSelectMap(ids) {
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const map = {};
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ids.forEach((id) => { map[id] = true; });
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return map;
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},
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toggleSelect(e) {
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const id = e.currentTarget.dataset.id;
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const ids = this.data.selectedIds.slice();
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const i = ids.indexOf(id);
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if (i >= 0) ids.splice(i, 1); else ids.push(id);
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this.setData({ selectedIds: ids, selectedMap: this.buildSelectMap(ids) });
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},
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confirmSelect() {
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if (!this.data.selectedIds.length) return wx.showToast({ title: '至少选一只', icon: 'none' });
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this.startSession(this.data.selectedIds);
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},
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// ===== 会话生命周期 =====
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startSession(dogIds) {
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const session = { dogIds, startAt: Date.now(), pausedTotal: 0, pausedAt: null, pooped: false, meters: 0, status: 'walking' };
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store.setWalkSession(session);
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store.set({ currentDogId: dogIds[0] });
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this.setActiveNames(dogIds);
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this.setData({ status: 'walking', pooped: false });
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this.startTimer();
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this.startLocation();
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},
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resumeFrom(session) {
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this.setActiveNames(session.dogIds);
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this.setData({ status: session.status, pooped: session.pooped });
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if (session.status === 'walking') { this.startTimer(); this.startLocation(); }
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else this.renderTime();
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this.refreshGps();
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},
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setActiveNames(dogIds) {
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const map = {};
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(this.data.dogs || []).forEach((d) => { map[d._id] = d.name; });
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this.setData({ activeDogNames: dogIds.map((id) => map[id] || '狗狗').join('、') });
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},
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// ===== 计时（时间戳差值）=====
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elapsedSec() {
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const s = store.getWalkSession();
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if (!s) return 0;
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const end = s.status === 'paused' ? s.pausedAt : Date.now();
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return Math.max(0, Math.floor((end - s.startAt - s.pausedTotal) / 1000));
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},
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renderTime() { this.setData({ timeText: formatDuration(this.elapsedSec()) }); },
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startTimer() { this.clearTimer(); this.renderTime(); this._timer = setInterval(() => this.renderTime(), 1000); },
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clearTimer() { if (this._timer) { clearInterval(this._timer); this._timer = null; } },
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// ===== GPS 距离累计（可选增强，R6）=====
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startLocation() {
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if (this._locOn) return;
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const s = store.getWalkSession();
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const primary = (this.data.dogs || []).find((d) => s && d._id === s.dogIds[0]);
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this._stride = (primary && (primary.stride || BASE_STRIDE[primary.sizeLevel])) || 0.35;
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this._lastPoint = null;
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this._locCb = (res) => this.onLoc(res);
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wx.startLocationUpdate({
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success: () => {
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this._locOn = true;
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wx.onLocationChange(this._locCb);
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this.setData({ gps: 'on' });
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this.refreshGps();
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},
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fail: () => { this.setData({ gps: 'denied' }); }, // 未授权 → 降级，只保留时长
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});
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},
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onLoc(res) {
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const s = store.getWalkSession();
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if (!s || s.status !== 'walking') { this._lastPoint = null; return; } // 暂停不累计
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if (res.accuracy && res.accuracy > 50) return; // 精度差丢弃
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const p = { lat: res.latitude, lon: res.longitude };
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if (this._lastPoint) {
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const seg = haversine(this._lastPoint.lat, this._lastPoint.lon, p.lat, p.lon);
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if (seg >= 2 && seg <= 50) { // 过滤静止抖动(<2m)与跳点(>50m)
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s.meters = (s.meters || 0) + seg;
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store.setWalkSession(s);
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this.refreshGps();
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}
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}
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this._lastPoint = p;
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},
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refreshGps() {
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if (this.data.gps !== 'on') return;
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const s = store.getWalkSession();
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const m = (s && s.meters) || 0;
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this.setData({
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distanceText: (m / 1000).toFixed(2),
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stepsText: String(dogStepsFromMeters(m, this._stride) || 0),
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});
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},
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stopLocation() {
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if (this._locOn) {
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wx.offLocationChange(this._locCb);
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wx.stopLocationUpdate();
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this._locOn = false;
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}
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},
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// ===== 便便打卡 =====
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togglePoop() {
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const s = store.getWalkSession();
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if (!s) return;
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s.pooped = !s.pooped;
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store.setWalkSession(s);
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this.setData({ pooped: s.pooped });
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},
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// ===== 暂停 / 继续 =====
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pause() {
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const s = store.getWalkSession();
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if (!s || s.status !== 'walking') return;
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s.status = 'paused';
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s.pausedAt = Date.now();
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store.setWalkSession(s);
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this.clearTimer();
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this._lastPoint = null;
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this.setData({ status: 'paused' });
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this.renderTime();
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},
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resume() {
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const s = store.getWalkSession();
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if (!s || s.status !== 'paused') return;
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s.pausedTotal += Date.now() - s.pausedAt;
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s.pausedAt = null;
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s.status = 'walking';
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store.setWalkSession(s);
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this.setData({ status: 'walking' });
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this.startTimer();
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},
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// ===== 结束 =====
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askEnd() { this.setData({ showEndConfirm: true }); },
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cancelEnd() { this.setData({ showEndConfirm: false }); },
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async confirmEnd() {
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const s = store.getWalkSession();
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if (!s) return;
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this.clearTimer();
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this.stopLocation();
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const duration = this.elapsedSec();
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const endAt = Date.now();
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const distanceMeters = this.data.gps === 'on' ? Math.round(s.meters || 0) : null;
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this.setData({ showEndConfirm: false });
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const res = await call('walkSave', {
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action: 'finish',
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dogIds: s.dogIds,
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startAt: s.startAt,
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endAt,
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duration,
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distanceMeters, // 米；未授权定位时为 null（R6）
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pooped: s.pooped,
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}, { loading: true, loadingText: '生成成果卡' });
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if (!res.ok) return;
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store.setWalkSession(null);
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getApp().globalData.lastSummary = res.data;
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wx.redirectTo({ url: '/pages/summary/summary' });
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},
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});
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