grandfather-clock: initial code commit

apps/grandfather-clock/widget.js

@@ -1,5 +1,67 @@
 (() => {
 
+    // todo: all of these configurable through app settings menu.
+    const twelve_hour = true;
+    const swap_meridian = false;
+    const hour_attention_buzz_ms = 1000;
+    const hour_count_buzz_ms = 250;
+    const fraction_count_buzz_ms = 250;
+    const fractions_of_hour = 4; // 4 = 15min intervals
+    const wait_ms = 500;
+    const meridian_buzz_ms = 100;
+    const meridian_buzz_wait_ms = 50;
 
+    let date;
+    let fractionMs = 3600000 / fractions_of_hour
 
+    let chime = function () {
+        date = new Date();
+        let hourFrac = Math.floor(date.getMinutes() / (60 / fractions_of_hour));
+
+        if (hourFrac == 0) { // if it's an o'clock hour
+            let chimeHour = (twelve_hour ? date.getHours() % 12 : date.getHours());
+            if (chimeHour == 0) (twelve_hour ? chimeHour += 12 : chimeHour += 24);
+
+            Bangle.buzz(hour_attention_buzz_ms).then(() => { // initial buzz
+                setTimeout(hourChime, wait_ms, chimeHour); // wait a period before doing the first chime
+            });
+        } else { // if it's a fraction of an hour
+            fractionChime(hourFrac);
+        }
+
+        queueNextChime();
+    };
+
+    let hourChime = function (hoursLeftToChime) {
+        hoursLeftToChime--;
+        Bangle.buzz(hour_count_buzz_ms).then(() => { // recursive. buzz and wait to do the next buzz.
+            if (hoursLeftToChime > 0) {
+                setTimeout(hourChime, wait_ms, hoursLeftToChime);
+            } else if (twelve_hour) { // once finished with the hour count
+                setTimeout(meridianChime, wait_ms, (date.getHours() >= 12)); // if in twelve hour mode, queue up the meridian chime.
+            }
+        });
+    };
+
+    let fractionChime = function (fractionsLeftToChime) {
+        fractionsLeftToChime--;
+        Bangle.buzz(fraction_count_buzz_ms).then(() => { // recursive. buzz and wait to do the next buzz.
+            if (fractionsLeftToChime > 0) setTimeout(fractionChime, wait_ms, fractionsLeftToChime);
+        });
+    };
+
+    let meridianChime = function (meridian) {
+        if ((swap_meridian ? !meridian : meridian)) { // default: if PM
+                Bangle.buzz(meridian_buzz_ms).then(setTimeout(Bangle.buzz, meridian_buzz_wait_ms, meridian_buzz_ms)); // buzz once, wait, buzz again.
+        } else { // default: if AM
+                Bangle.buzz(meridian_buzz_ms); // buzz once.
+        }
+    };
+
+    let queueNextChime = function () {
+        let msUntilNextFraction = fractionMs - (Date.now() % fractionMs);
+        setTimeout(chime, msUntilNextFraction);
+    };
+
+    queueNextChime();
 })()