farsi-numbers - new plugin to fix sorting issue on columns containing Farsi numbers

sorting/farsi-numbers.js

@@ -0,0 +1,50 @@
+/**
+ * Sorts a column containing Farsi numbers. Farsi numbers can easily be 
+ * mapped 1:1 to latin numbers - ۱ = 1, ۲ = 2, ۱۲ = 12 and so on.
+ *
+ *
+ *  @name Farsi numbers
+ *  @summary Sorts columns containing UTF8 Farsi numbers
+ *  @author [Behrooz Janfada](behrooz dot janfada at gmail com)
+ *
+ *  @example
+ *    $('#example').DataTable( {
+ *       columnDefs: [
+ *         { type: 'farsi-numbers', targets: 0 }
+ *       ]
+ *    } );
+ */
+
+jQuery.extend( jQuery.fn.dataTableExt.oSort, {
+	"farsi-numbers-pre" : function(a) {
+		function farsiToLatin(farsi) {
+			switch(farsi) {
+				case "۰": return 0; break;
+				case "۱": return 1; break;
+				case "۲": return 2; break;
+				case "۳": return 3; break;
+				case "۴": return 4; break;
+				case "۵": return 5; break;
+				case "۶": return 6; break;
+				case "۷": return 7; break;
+				case "۸": return 8; break;
+				case "۹": return 9; break;        
+				default : return 0; break;
+			}        
+		}
+		var latin = '', i = 0;
+		for (i; i<a.length; i++) {
+			latin += farsiToLatin(a.charAt(i))
+		}
+		return parseInt(latin)
+	},
+
+	"farsi-numbers-asc": function(a, b) {
+		return ((a < b) ? -1 : ((a > b) ? 1 : 0))
+	},
+
+	"farsi-numbers-desc": function(a, b) {
+		return ((a < b) ? 1 : ((a > b) ? -1 : 0))
+	}
+
+} );