1 files changed, 62 insertions, 1 deletions
diff --git a/framework/Web/Javascripts/extended/string.js b/framework/Web/Javascripts/extended/string.js
index fe586cfb..9b4c501b 100644
--- a/framework/Web/Javascripts/extended/string.js
+++ b/framework/Web/Javascripts/extended/string.js
@@ -57,6 +57,67 @@ Object.extend(String.prototype, {
 				Logger.error("Missing function", this);
 			return Prototype.emptyFunction;
 		}
-	}
+	},
+
+	/** 
+	 * Convert a string into integer, returns null if not integer.
+	 * @return {integer|null} null if string does not represent an integer.
+	 */
+	toInteger : function()
+	{
+		var exp = /^\s*[-\+]?\d+\s*$/;
+		if (this.match(exp) == null)
+			return null;
+		var num = parseInt(this, 10);
+		return (isNaN(num) ? null : num);
+	},
 
+	/** 
+	 * Convert a string into a double/float value. <b>Internationalization 
+	 * is not supported</b>
+	 * @param {string} the decimal character
+	 * @return {float|null} null if string does not represent a float value
+	 */
+	toDouble : function(decimalchar)
+	{
+		decimalchar = decimalchar || ".";
+		var exp = new RegExp("^\\s*([-\\+])?(\\d+)?(\\" + decimalchar + "(\\d+))?\\s*$");
+		var m = this.match(exp);
+		if (m == null)	
+			return null;
+		var cleanInput = m[1] + (m[2].length>0 ? m[2] : "0") + "." + m[4];
+		var num = parseFloat(cleanInput);
+		return (isNaN(num) ? null : num);
+	},
+
+	/**
+	 * Convert strings that represent a currency value (e.g. a float with grouping 
+	 * characters) to float. E.g. "10,000.50" will become "10000.50". The number 
+	 * of dicimal digits, grouping and decimal characters can be specified.
+	 * <i>The currency input format is <b>very</b> strict, null will be returned if
+	 * the pattern does not match</i>.
+	 * @param {string} the grouping character, default is ","
+	 * @param {int} number of decimal digits
+	 * @param {string} the decimal character, default is "."
+	 * @type {float|null} the currency value as float.
+	 */
+	toCurrency : function(groupchar, digits, decimalchar)
+	{
+		groupchar = groupchar || ",";
+		decimalchar = decimalchar || ".";
+		digits = typeof(digits) == "undefined" ? 2 : digits;
+
+		var exp = new RegExp("^\\s*([-\\+])?(((\\d+)\\" + groupchar + ")*)(\\d+)"
+			+ ((digits > 0) ? "(\\" + decimalchar + "(\\d{1," + digits + "}))?" : "")
+			+ "\\s*$");
+		var m = this.match(exp);
+		if (m == null)
+			return null;
+		var intermed = m[2] + m[5] ;
+		var cleanInput = m[1] + intermed.replace(
+				new RegExp("(\\" + groupchar + ")", "g"), "") 
+								+ ((digits > 0) ? "." + m[7] : "");
+		var num = parseFloat(cleanInput);
+		return (isNaN(num) ? null : num);
+	}
 });