Added NATO Alphabet app files

apps/nato/appsManifestEntry.txt

@@ -0,0 +1,13 @@
+  { "id": "nato",
+    "name": "NATO Alphabet",
+    "shortName" : "NATOAlphabet",
+    "icon": "nato.png",
+    "version":"0.01",
+    "type": "app",
+    "description": "Learn the NATO Phonetic alphabet plus some numbers.",
+    "tags": "app,learn,visual",
+    "storage": [
+      {"name":"nato.app.js","url":"nato.js"},
+      {"name":"nato.img","url":"nato-icon.js","evaluate":true}
+    ],
+  },

apps/nato/nato-icon.js

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+require("heatshrink").decompress(atob("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"))

apps/nato/nato.js

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+/**
+  * Teach a user the NATO Phonetic Alphabet + numbers
+*/
+
+/**
+ * Constants
+*/
+const FONT_NAME = 'Vector12';
+const FONT_SIZE = 80;
+const SCREEN_PIXELS = 240;
+const UNIT = 100;
+const NATO_MAP = {
+  A: 'ALFA',
+  B: 'BRAVO',
+  C: 'CHARLIE',
+  D: 'DELTA',
+  E: 'ECHO',
+  F: 'FOXTROT',
+  G: 'GOLF',
+  H: 'HOTEL',
+  I: 'INDIA',
+  J: 'JULIETT',
+  K: 'KILO',
+  L: 'LIMA',
+  M: 'MIKE',
+  N: 'NOVEMBER',
+  O: 'OSCAR',
+  P: 'PAPA',
+  Q: 'QUEBEC',
+  R: 'ROMEO',
+  S: 'SIERRA',
+  T: 'TANGO',
+  U: 'UNIFORM',
+  V: 'VICTOR',
+  W: 'WHISKEY',
+  X: 'X-RAY',
+  Y: 'YANKEE',
+  Z: 'ZULU',
+  '0': 'ZE-RO',
+  '1': 'WUN',
+  '2': 'TOO',
+  '3': 'TREE',
+  '4': 'FOW-ER',
+  '5': 'FIFE',
+  '6': 'SIX',
+  '7': 'SEV-EN',
+  '8': 'AIT',
+  '9': 'NIN-ER',
+};
+
+/**
+ * Set the local state
+*/
+let INDEX = 0;
+let showLetter = true;
+
+/**
+ * Utility functions for writing text, changing state
+*/
+const writeText = (txt) => {
+  g.clear();
+  g.setFont(FONT_NAME, FONT_SIZE);
+
+  var width = g.stringWidth(txt);
+
+  var fontFix = FONT_SIZE;
+  while(width > SCREEN_PIXELS-10){
+    fontFix--;
+    g.setFont(FONT_NAME, fontFix);
+    width = g.stringWidth(txt);
+  }
+  g.drawString(txt, (SCREEN_PIXELS / 2) - (width / 2), SCREEN_PIXELS / 2);
+};
+const writeLetter = () => {
+  writeText(Object.keys(NATO_MAP)[INDEX]);
+};
+const writeCode = () => {
+  writeText(NATO_MAP[Object.keys(NATO_MAP)[INDEX]]);
+};
+const toggle = () => {
+  showLetter = !showLetter;
+  if(showLetter){
+    writeLetter();
+  }else {
+    writeCode();
+  }
+};
+
+/**
+ * Bootstrapping
+*/
+g.clear();
+g.setFont(FONT_NAME, FONT_SIZE);
+g.setColor(0, 1, 0);
+g.setFontAlign(-1, 0, 0);
+
+
+const step = (positive) => () => {
+  if (positive) {
+    INDEX = INDEX + 1;
+    if (INDEX > Object.keys(NATO_MAP).length - 1) INDEX = 0;
+  } else {
+    INDEX = INDEX - 1;
+    if (INDEX < 0) INDEX = Object.keys(NATO_MAP).length - 1;
+  }
+  showLetter = true;
+  writeLetter();
+};
+
+writeLetter();
+
+// Press the middle button to see the NATO Phonetic wording
+setWatch(toggle, BTN2, { repeat: true });
+// Allow user to switch between letters
+setWatch(step(true), BTN1, { repeat: true });
+setWatch(step(false), BTN3, { repeat: true });