Update watch face: modular refactor + OWM/Solar/background + codegen tools
- Split render into FieldTable/Fields/Icons/Layout/Settings modules - Add Fenix8V3Background, Owm (weather), Solar modules - Add tools/ generators (gen_fields/gen_icons/gen_themes/gen_preview_svg) - Tune README/manifest/strings/settings
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167
source/Fenix8V3Background.mc
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167
source/Fenix8V3Background.mc
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import Toybox.Lang;
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import Toybox.Application;
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import Toybox.Background;
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import Toybox.Communications;
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import Toybox.System;
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import Toybox.Time;
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import Toybox.Position;
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// ============================================================================
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// OpenWeatherMap —— 后台拉取端
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// ----------------------------------------------------------------------------
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// 表盘进程绝大多数时间没在运行，onUpdate 又必须够快，不可能在绘制路径里发
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// HTTP 请求。Connect IQ 的方案是**后台服务**：系统按定时器唤醒一个独立进程，
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// 在里面发请求，把结果通过 Background.exit() 交回前台，前台再写进 Storage。
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//
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// 每次唤醒发两个请求：
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// 1. 当前天气 /data/2.5/weather
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// 2. 短期预报 /data/2.5/forecast?cnt=16（约 48 小时，够算明日/后日高低温）
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//
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// ⚠️ 预报接口必须带 cnt 限制条数。后台进程的内存预算非常小（约 32KB），
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// 完整的 5 天 / 3 小时预报解析出来能有几十 KB，会直接爆掉。
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//
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// 响应会被**压平成一个扁平字典**再交回去，键名是短名（"temp"/"hi1"…），
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// 与 Owm.get() 的取值一一对应 —— 这样表盘侧永远不用扛一棵 JSON 树。
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// ============================================================================
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(:background)
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class Fenix8V3Background extends System.ServiceDelegate {
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private var mResult as Dictionary = {};
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private var mPending = 0;
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function initialize() {
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ServiceDelegate.initialize();
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}
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// 系统按定时器唤醒后台进程时调用。
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// 注意这里是**独立进程**，内存预算比前台小得多，而且不能碰 UI。
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function onTemporalEvent() as Void {
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if (!Owm.enabled()) {
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Background.exit(null);
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return;
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}
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var lat = Application.Storage.getValue("lastLat");
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var lon = Application.Storage.getValue("lastLon");
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if (lat == null || lon == null) {
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// 表盘一拿到位置就会存进 Storage（见 Fields.Ctx.where）。
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// 在那之前没有坐标可问，直接退出。
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Background.exit(null);
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return;
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}
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mResult = {};
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mPending = 2;
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// 一律用 units=metric 请求，单位换算统一放到 Fields 里按用户设置做，
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// 这样切换单位不用重新联网。
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var common = {"lat" => lat, "lon" => lon,
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"appid" => Owm.key(), "units" => "metric"};
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var opts = {
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:method => Communications.HTTP_REQUEST_METHOD_GET,
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:responseType => Communications.HTTP_RESPONSE_CONTENT_TYPE_JSON
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};
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Communications.makeWebRequest(
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"https://api.openweathermap.org/data/2.5/weather",
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common, opts, method(:onCurrent));
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var fc = {"lat" => lat, "lon" => lon, "appid" => Owm.key(),
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"units" => "metric", "cnt" => 16};
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Communications.makeWebRequest(
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"https://api.openweathermap.org/data/2.5/forecast",
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fc, opts, method(:onForecast));
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}
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// 当前天气的回调。OWM 的 JSON 是嵌套的，逐层取值时每层都要判空 ——
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// 缺字段是常态（比如没下雨就没有 rain 节点）。
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function onCurrent(code as Number, body as Dictionary?) as Void {
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if (code == 200 && body != null) {
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var main = body.get("main") as Dictionary?;
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if (main != null) {
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put("temp", main.get("temp"));
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put("feels", main.get("feels_like"));
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put("tmin", main.get("temp_min"));
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put("tmax", main.get("temp_max"));
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put("pressure", main.get("pressure"));
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put("humidity", main.get("humidity"));
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}
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put("visibility", body.get("visibility"));
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var wind = body.get("wind") as Dictionary?;
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if (wind != null) {
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put("wind", wind.get("speed"));
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put("winddeg", wind.get("deg"));
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put("gust", wind.get("gust"));
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}
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var clouds = body.get("clouds") as Dictionary?;
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if (clouds != null) { put("clouds", clouds.get("all")); }
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var rain = body.get("rain") as Dictionary?;
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if (rain != null) { put("rain", rain.get("1h")); }
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var snow = body.get("snow") as Dictionary?;
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if (snow != null) { put("snow", snow.get("1h")); }
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var wx = body.get("weather") as Array?;
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if (wx != null && wx.size() > 0) {
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var w0 = wx[0] as Dictionary;
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put("short", w0.get("main"));
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put("long", w0.get("description"));
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}
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put("city", body.get("name"));
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put("dt", Time.now().value());
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}
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done();
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}
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// 预报返回的是 3 小时粒度的列表。这里按「距今天几天」把条目分到
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// 明天 / 后天两个桶里，各自取最高最低温；降水概率取明天的最大值。
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function onForecast(code as Number, body as Dictionary?) as Void {
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if (code == 200 && body != null) {
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var list = body.get("list") as Array?;
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if (list != null) {
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var today = dayNumber(Time.now().value());
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var lo1 = null; var hi1 = null; var lo2 = null; var hi2 = null;
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var pop1 = null;
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var arr = list;
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for (var i = 0; i < arr.size(); i++) {
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var e = arr[i] as Dictionary;
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var dt = e.get("dt");
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if (dt == null) { continue; }
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var day = dayNumber(dt as Number) - today;
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var m = e.get("main") as Dictionary?;
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if (m == null) { continue; }
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var tmin = m.get("temp_min");
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var tmax = m.get("temp_max");
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if (day == 1) {
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if (lo1 == null || tmin < lo1) { lo1 = tmin; }
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if (hi1 == null || tmax > hi1) { hi1 = tmax; }
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var pop = e.get("pop");
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if (pop != null && (pop1 == null || pop > pop1)) { pop1 = pop; }
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} else if (day == 2) {
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if (lo2 == null || tmin < lo2) { lo2 = tmin; }
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if (hi2 == null || tmax > hi2) { hi2 = tmax; }
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}
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}
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put("lo1", lo1); put("hi1", hi1);
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put("lo2", lo2); put("hi2", hi2);
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put("pop", pop1);
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}
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}
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done();
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}
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// 距 Unix 纪元的整天数，用来给预报条目分桶。
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function dayNumber(unix as Number) as Number {
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return unix / 86400;
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}
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// 只写入非空值，免得用 null 覆盖字典里已有的内容。
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function put(k as String, v) as Void {
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if (v != null) { mResult.put(k, v); }
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}
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// 两个请求都回来了才算一轮完整数据，谁最后完成谁负责退出服务。
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// 一条都没拿到就传 null，避免用空字典覆盖掉上一次的好数据。
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function done() as Void {
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mPending--;
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if (mPending > 0) { return; }
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if (mResult.size() == 0) {
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Background.exit(null);
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} else {
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Background.exit(mResult);
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}
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}
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}
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