1 files changed, 75 insertions, 0 deletions
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..2b08cbe
--- /dev/null
+++ b/index.js
@@ -0,0 +1,75 @@
+var multipliers = require('./lib/multipliers.js');
+var digits = require('./lib/digits.js');
+var utils = require('./lib/utils.js');
+var BigNum = require('bignumber.js');
+
+function parseTriple(str, useAnd, hasBigger) {
+  var hundredsDigit = 0;
+  var tensDigit = 0;
+  var onesDigit = 0;
+  var bottomPair = 0;
+  if (str.length === 3) {
+    hundredsDigit = utils.atoi(str[0]);
+    tensDigit = utils.atoi(str[1]);
+    onesDigit = utils.atoi(str[2]);
+    bottomPair = utils.atoi(str.substring(1, 3));
+  } else if (str.length === 2) {
+    tensDigit = utils.atoi(str[0]);
+    onesDigit = utils.atoi(str[1]);
+    bottomPair = utils.atoi(str);
+  } else if (str.length === 1) {
+    onesDigit = utils.atoi(str[0]);
+    bottomPair = onesDigit;
+  }
+  var parts = [];
+  if (hundredsDigit > 0 && digits.hasOwnProperty(hundredsDigit)) {
+    parts.push(digits[hundredsDigit]);
+    parts.push('hundred');
+  }
+	if (hundredsDigit > 0) {
+		hasBigger = true;
+	}
+  if (hasBigger && bottomPair > 0 && useAnd) {
+    parts.push('and');
+  }
+  if (bottomPair > 0 && digits.hasOwnProperty(bottomPair)) {
+    parts.push(digits[bottomPair]);
+  } else {
+    if (tensDigit > 0 && digits.hasOwnProperty(tensDigit * 10)) {
+      parts.push(digits[tensDigit * 10]);
+    }
+    if (onesDigit > 0 && digits.hasOwnProperty(onesDigit)) {
+      parts.push(digits[onesDigit]);
+    }
+  }
+  return parts;
+};
+
+function numToAlpha(input, useAnd) {
+	var bn = new BigNum(input).toString(10);
+  var parts = [];
+  var numString = bn;
+  if (bn[0] === '-') {
+    parts.push('negative');
+    numString = bn.substring(1, bn.length);
+  }
+  if (numString === '0') {
+    parts.push('zero');
+  } else {
+    var chunks = utils.chunkify(numString);
+    chunks.forEach(function(chunk, idx) {
+      var mult = chunks.length - idx - 1;
+      var useAndForChunk = useAnd && mult === 0;
+			var triple = parseTriple(chunk, useAndForChunk, chunks.length > 1);
+			if (triple.length > 0) {
+				Array.prototype.push.apply(parts, triple);
+				if (multipliers.hasOwnProperty(mult)) {
+					parts.push(multipliers[mult]);
+				}
+			}
+    });
+  }
+  return parts.join(' ');
+};
+
+module.exports = numToAlpha;