Create primetime.js

apps/primetime/primetime.js

@@ -0,0 +1,89 @@
+const h = g.getHeight();
+const w = g.getWidth();
+
+
+
+// creates a list of prime factors of n and outputs them as a string, if n is prime outputs "Prime Time!"
+function primeFactors(n) {
+  const factors = [];
+  let divisor = 2;
+
+  while (n >= 2) {
+    if (n % divisor == 0) {
+      factors.push(divisor);
+      n = n / divisor;
+    } else {
+      divisor++;
+    }
+  }
+  if (factors.length === 1) {
+    return "Prime Time!";
+  }
+  else
+    return factors.toString();
+}
+
+
+// converts time HR:MIN to integer HRMIN e.g. 15:35 => 1535
+function timeToInt(t) {
+    var arr = t.split(':');
+    var intTime = parseInt(arr[0])*100+parseInt(arr[1]);
+
+    return intTime;
+}
+
+
+
+function draw() {
+  var date = new Date();
+  var timeStr = require("locale").time(date,1);
+  var primeStr = primeFactors(timeToInt(timeStr));
+
+  g.reset();
+  g.setColor(0,0,0);
+  g.fillRect(Bangle.appRect);
+
+  g.setFont("6x8", w/30);
+  g.setFontAlign(0, 0);
+  g.setColor(100,100,100);
+  g.drawString(timeStr, w/2, h/2);
+  g.setFont("6x8", w/60);
+  g.drawString(primStr, w/2, 3*h/4);
+  queueDraw();
+}
+
+// timeout used to update every minute
+var drawTimeout;
+
+// schedule a draw for the next minute
+function queueDraw() {
+  if (drawTimeout) clearTimeout(drawTimeout);
+  drawTimeout = setTimeout(function() {
+    drawTimeout = undefined;
+    draw();
+  }, 60000 - (Date.now() % 60000));
+}
+
+// Stop updates when LCD is off, restart when on
+Bangle.on('lcdPower',on=>{
+  if (on) {
+    draw(); // draw immediately, queue redraw
+  } else { // stop draw timer
+    if (drawTimeout) clearTimeout(drawTimeout);
+    drawTimeout = undefined;
+  }
+});
+
+g.clear();
+
+// Show launcher when middle button pressed
+// Bangle.setUI("clock");
+// use  clockupdown as it tests for issue #1249
+Bangle.setUI("clockupdown", btn=> {
+  draw();
+});
+
+// Load widgets
+Bangle.loadWidgets();
+Bangle.drawWidgets();
+draw();