Add new widget alarmeta

This widget displays the time to the next Alarm or Timer in hours and minutes.

apps/alarmeta/metadata.json

@@ -0,0 +1,15 @@
+{
+  "id": "alarmeta",
+  "name": "Alarm & Timer ETA",
+  "shortName": "Alarm ETA",
+  "version": "0.01",
+  "description": "A widget that displays the time to the next Alarm or Timer in hours and minutes, maximum 24h",
+  "icon": "widget.png",
+  "type": "widget",
+  "tags": "widget",
+  "supports": ["BANGLEJS","BANGLEJS2"],
+  "screenshots" : [ { "url":"screenshot.png" } ],
+  "storage": [
+    {"name":"alarmeta.wid.js","url":"widget.js"}
+  ]
+}

apps/alarmeta/widget.js

@@ -0,0 +1,37 @@
+(() => {
+  const alarms = require("Storage").readJSON("sched.json",1) || [];
+
+  function draw() {
+    const times = alarms.map(alarm => require("sched").getTimeToAlarm(alarm)).filter(a => a !== undefined);
+    const next = Math.min.apply(null, times);
+    if (next > 0 && next < 86400000) {
+      const hours = Math.floor((next % 86400000) / 3600000).toString();
+      const minutes = Math.floor(((next % 86400000) % 3600000) / 60000).toString();
+
+      g.reset(); // reset the graphics context to defaults (color/font/etc)
+      g.setFontAlign(0,0); // center fonts
+      g.clearRect(this.x, this.y, this.x+this.width-1, this.y+23);
+
+      // Use 'locale' module to get a shortened month name
+      // in the correct language
+      var text = hours.padStart(2, '0') + ":" + minutes.padStart(2, '0');
+      g.setFont("6x8:1x2");
+      g.drawString(text, this.x+this.width/2, this.y+12);
+      if (this.width === 0) {
+          this.width = 6*5+2;
+          Bangle.drawWidgets(); // width changed, re-layout
+      }
+    }
+  }
+
+  setInterval(function() {
+    WIDGETS["alarmeta"].draw(WIDGETS["alarmeta"]);
+  }, 30000); // update every half minute
+
+  // add your widget
+  WIDGETS["alarmeta"]={
+    area:"tl",
+    width: 0, // hide by default = assume no timer
+    draw:draw
+  };
+})();