add mouseEnterToggleClass directive

modules/core/client/directives/toggle-class.client.directive.js

@@ -27,4 +27,28 @@
       });
     }
   }
+
+  angular.module('core')
+    .directive('mouseEnterToggleClass', mouseEnterToggleClass);
+
+  function mouseEnterToggleClass() {
+    var directive = {
+      restrict: 'A',
+      link: link
+    };
+
+    return directive;
+
+    function link(scope, element, attrs) {
+      element.bind('mouseenter', function () {
+        if (!element.hasClass(attrs.mouseEnterToggleClass)) {
+          element.addClass(attrs.mouseEnterToggleClass);
+          element.removeClass(attrs.baseClass);
+
+          element.siblings().removeClass(attrs.mouseEnterToggleClass);
+          element.siblings().addClass(attrs.baseClass);
+        }
+      });
+    }
+  }
 }());