Add support for regular expressions.

src/RuleMatcher.js

@@ -4,17 +4,18 @@ var RuleMatcher = function(rules){
     this.rules = rules;
 
     this.redirectOnMatch = function(request){
-        var rule = _.find(rules, function(rule){ 
-            return rule.isActive 
-            && request.url.indexOf(rule.from) > -1 
-            && request.requestId !== lastRequestId; 
+        var rule = _.find(rules, function(rule){
+            var match = new RegExp(rule.from);
+            return rule.isActive && match.test(request.url)  &&
+                request.requestId !== lastRequestId;
         });
 
         if(rule){
             lastRequestId = request.requestId;
+            var match = new RegExp(rule.from);
             return {
-                redirectUrl : request.url.replace(rule.from, rule.to)
+                redirectUrl : request.url.replace(match, rule.to)
             };
         }
     };
-};
+};

src/RulesController.js

@@ -42,4 +42,4 @@ angular.module('switcheroo')
 	$scope.$watch('rules', function(oldValue, newValue){
 		rulesService.set(newValue);
 	}, true);
-}]);
+}]);

tests/spec/RuleMatcher.spec.js

@@ -32,6 +32,16 @@ describe("RuleMatcher", function() {
     expect(sut.redirectOnMatch(request)).toEqual({ redirectUrl: 'http://bard.com' });
   });
 
+  it('given request url should redirect to rule with regexp matching', function(){
+    sut = new RuleMatcher([
+      givenRule('fo+', 'bar', true),
+    ]);
+
+    var request = givenRequest(1, 'http://food.com');
+
+    expect(sut.redirectOnMatch(request)).toEqual({ redirectUrl: 'http://bard.com' });
+  });
+
   it('given request url should redirect to first matching active rule', function(){
     sut = new RuleMatcher([
       givenRule('foo', 'bar', false),