common cleanup

lib/utils.js

@@ -20,6 +20,8 @@
  * @date 2015
  */
 
+var c = require('./const');
+
 /// Finds first index of array element matching pattern
 /// @param array
 /// @param callback pattern
@@ -101,6 +103,32 @@ var filterEvents = function (json) {
     });
 };
 
+/// used to transform value/string to eth string
+/// TODO: use BigNumber.js to parse int
+/// TODO: add tests for it!
+var toEth = function (str) {
+    var val = typeof str === "string" ? str.indexOf('0x') === 0 ? parseInt(str.substr(2), 16) : parseInt(str) : str;
+    var unit = 0;
+    var units = c.ETH_UNITS;
+    while (val > 3000 && unit < units.length - 1)
+    {
+        val /= 1000;
+        unit++;
+    }
+    var s = val.toString().length < val.toFixed(2).length ? val.toString() : val.toFixed(2);
+    var replaceFunction = function($0, $1, $2) {
+        return $1 + ',' + $2;
+    };
+
+    while (true) {
+        var o = s;
+        s = s.replace(/(\d)(\d\d\d[\.\,])/, replaceFunction);
+        if (o === s)
+            break;
+    }
+    return s + ' ' + units[unit];
+};
+
 module.exports = {
     findIndex: findIndex,
     toAscii: toAscii,
@@ -108,6 +136,7 @@ module.exports = {
     extractDisplayName: extractDisplayName,
     extractTypeName: extractTypeName,
     filterFunctions: filterFunctions,
-    filterEvents: filterEvents
+    filterEvents: filterEvents,
+    toEth: toEth
 };