fix #485: weather: add wind direction

apps.json

@@ -531,7 +531,7 @@
   { "id": "weather",
     "name": "Weather",
     "icon": "icon.png",
-    "version":"0.04",
+    "version":"0.05",
     "description": "Show Gadgetbridge weather report",
     "readme": "readme.md",
     "tags": "widget,outdoors",

apps/weather/ChangeLog

@@ -1,3 +1,4 @@
 0.02: Make minor adjustments to widget, and discard stale weather data after a configurable period.
 0.03: Fix flickering last updated time.
 0.04: Adjust "weather unknown" message according to Bluetooth connection.
+0.05: Add wind direction.

apps/weather/app.js

@@ -30,10 +30,14 @@
     g.setFont("6x8", 1);
     g.setFontAlign(-1, 0, 0);
     g.drawString("Humidity", 135, 130);
-    g.drawString("Wind", 135, 142);
     g.setFontAlign(1, 0, 0);
     g.drawString(w.hum+"%", 225, 130);
-    g.drawString(locale.speed(w.wind), 225, 142);
+    if ('wind' in w) {
+      g.setFontAlign(-1, 0, 0);
+      g.drawString("Wind", 135, 142);
+      g.setFontAlign(1, 0, 0);
+      g.drawString(locale.speed(w.wind)+' '+w.wrose.toUpperCase(), 225, 142);
+    }
 
     g.setFont("6x8", 2).setFontAlign(0, 0, 0);
     g.drawString(w.loc, 120, 170);

apps/weather/lib.js

@@ -22,6 +22,20 @@ function scheduleExpiry(json) {
   }
 }
 
+/**
+ * Convert numeric direction into human-readable label
+ *
+ * @param {number} deg - Direction in degrees
+ * @return {string|null} - Nearest compass point
+ */
+function compassRose(deg) {
+  if (typeof deg === 'undefined') return null;
+  while (deg<0 || deg>360) {
+    deg = (deg+360)%360;
+  }
+  return ['n','ne','e','se','s','sw','w','nw','n'][Math.floor((deg+22.5)/45)];
+}
+
 function setCurrentWeather(json) {
   scheduleExpiry(json);
   exports.current = json.weather;
@@ -30,6 +44,9 @@ function setCurrentWeather(json) {
 function update(weatherEvent) {
   let weather = Object.assign({}, weatherEvent);
   weather.time = Date.now();
+  if ('wdir' in weather) {
+    weather.wrose = compassRose(weather.wdir);
+  }
   delete weather.t;
 
   let json = storage.readJSON('weather.json')||{};