Added tabata app to control high-intensity interval training

apps.json

@@ -1107,5 +1107,17 @@
       {"name":"openstmap.app.js","url":"app.js"},
       {"name":"openstmap.img","url":"app-icon.js","evaluate":true}
     ]
+  },
+  { "id": "tabata",
+    "name": "Tabata",
+    "shortName": "Tabata - Control High-Intensity Interval Training",
+    "icon": "tabata.png",
+    "version":"0.01",
+    "description": "Control high-intensity interval training (according to tabata: https://en.wikipedia.org/wiki/Tabata_method).",
+    "tags": "workout,health",
+    "storage": [
+      {"name":"tabata.app.js","url":"tabata.js"},
+      {"name":"tabata.img","url":"tabata-icon.js","evaluate":true}
+    ]
   }
 ]

apps/tabata/tabata-icon.js

@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwg96iOZzORgMZAYMQCxsBCwIAGDBsZyIDCCYQyBBAQuLEwWZCYYJBFx8BL4ITDjJILBgcJDYIGEyBCHFYQoGC4Y2BRBAJBC4wrDC4w9BiC6BC6Q6DAYIXpCIcJC/4X/C/4X/C50BjITCjOZD4IXOhOZCYMBAYIwEC52QC7QMDC/4XCzBH/C/4X/C5OQa6INBC4WRyIvQC5IOBC5YTBAYILByAECBAIXLA4IwBAYITBgMZDYIXGHgZICEAWRAYQfEAgIXIFAIIBiERCwYKCCQQOBBIQAvA"));

apps/tabata/tabata.js

@@ -0,0 +1,130 @@
+Bangle.loadWidgets();
+Bangle.drawWidgets();
+
+var settings = require("Storage").readJSON("tabata.json",1)||{};
+settings.pause = settings.pause || 10;
+settings.training = settings.training || 20;
+settings.rounds = settings.rounds || 8;
+
+const MAX_SECONDS = 100;
+
+function debounce(callback, ms) {
+  var timer;
+  return () => {
+    if (timer) clearTimeout(timer);
+    timer = setTimeout(callback, ms);
+  };
+}
+
+function saveSettings() {
+  require("Storage").write("tabata.json",JSON.stringify(settings));
+}
+
+var saveSettingsDebounce = debounce(saveSettings, 250);
+
+function showMainMenu() {
+  const menu = {
+    '': { 'title': 'Tabata Training' },
+    '>> Start >>': ()=> {
+      startTabata();
+    },
+    'Pause sec.': {
+      value: settings.pause,
+      onchange: function(v){
+        if (v<0)v=MAX_SECONDS;
+        if (v>MAX_SECONDS)v=0;
+        settings.pause=v;
+        this.value=v;
+        saveSettingsDebounce();
+      }
+    },
+    'Trainig sec.': {
+      value: settings.training,
+      onchange: function(v){if (v<0)v=MAX_SECONDS;if (v>MAX_SECONDS)v=0;settings.training=v;
+        this.value=v;
+        saveSettingsDebounce();
+      }
+    },
+    'Rounds': {
+      value: settings.rounds,
+      onchange: function(v){if (v<0)v=MAX_SECONDS;if (v>MAX_SECONDS)v=0;settings.rounds=v;this.value=v;
+        saveSettingsDebounce();
+      }
+    },
+    '< Back': () => load()
+  };
+  menu['< Back'] =  ()=>{load();};
+  return E.showMenu(menu);
+}
+
+function startTabata() {
+  g.clear();
+  Bangle.setLCDMode("doublebuffered");
+  g.flip();
+  var pause = settings.pause, 
+    training = settings.training, 
+    round = 1,
+    active = true,
+    clearBtn1, clearBtn2, clearBtn3, timer;
+  Bangle.buzz(1000, 1);
+
+  function exitTraining() {
+    clearTimeout(timer);
+    clearWatch(clearBtn1);
+    clearWatch(clearBtn2);
+    clearWatch(clearBtn2);
+    showMainMenu();
+  }
+
+  clearBtn1 = setWatch(exitTraining, BTN1);
+  clearBtn2 = setWatch(exitTraining, BTN2);
+  clearBtn3 = setWatch(exitTraining, BTN3);
+
+
+  timer = setInterval(function() {
+    if (round > settings.rounds) {
+      exitTraining();
+      return;
+    }
+    
+    if (active) {
+      drawCountDown(round, training, active);
+      training--;
+    } else {
+      drawCountDown(round, pause, active);
+      pause--;
+      if (pause !== 0) {
+        Bangle.buzz(50, 0.2);
+      }
+    }
+
+    if (training === 0) {
+      training = settings.training;
+      active = false;
+      Bangle.buzz(500, 1);
+    }
+    if (pause === 0) {
+      round++;
+      pause = settings.pause;
+      active = true;
+      Bangle.buzz(1000, 1);
+    }
+  }, 1000);
+}
+
+function drawCountDown(round, count, active) {
+  g.clear();
+
+  g.setFontAlign(0,0);
+  g.setFont("6x8", 2);
+  g.drawString("Round " + round + "/" + settings.rounds,120,6); 
+
+  g.setFont("6x8", 6);
+  g.drawString("" + count,120,80);
+
+  g.setFont("6x8",2);
+  g.drawString(active ? "Training" : "Pause", 120,45);
+  g.flip();
+}
+
+showMainMenu();