Implemented message filter support; closes #25.

Author: ShaneYu

src/app.provider.js

@@ -7,6 +7,10 @@ angular.module('bootstrap.angular.validation').provider('bsValidationConfig', fu
   // Display the validation error message below the `input` field with class "help-block"
   var displayErrorsAs = 'simple';
 
+  // Can be a string or list of any combination of filters; will be applied in order
+  // For example: 'lowercase' or ['lowercase', 'reverse'] (So long as the filter(s) exists)
+  var messageFilters = [];
+
   function shouldValidateOn(event) {
     if (angular.isString(validateFieldsOn)) {
       return validateFieldsOn === event;
@@ -61,6 +65,22 @@ angular.module('bootstrap.angular.validation').provider('bsValidationConfig', fu
     displayErrorsAs = type;
   };
 
+  this.global.useMessageFilters = function(filters) {
+      if (!filters) {
+          throw 'Please provide a string or list of filters to apply to messages';
+      }
+
+      if (!angular.isString(filters) && !angular.isArray(filters)) {
+          throw 'Filters should either be a string or a list';
+      }
+
+      messageFilters = filters;
+
+      if (!angular.isArray(messageFilters)) {
+          messageFilters = [messageFilters];
+      }
+  };
+
   this.$get = [function() {
     return {
       messages: _this.global.messages,
@@ -76,6 +96,10 @@ angular.module('bootstrap.angular.validation').provider('bsValidationConfig', fu
         return _this.global.errorMessagePrefix || '';
       },
 
+      getMessageFilters: function () {
+        return messageFilters;
+      },
+
       getTooltipPlacement: function() {
         return _this.global.tooltipPlacement;
       },

src/services/validation.service.js

@@ -6,7 +6,7 @@
  * @description Core service of this module to provide various default validations.
  */
 angular.module('bootstrap.angular.validation').factory('BsValidationService', ['$interpolate', 'bsValidationConfig',
-'$injector', function($interpolate, validationConfig, $injector) {
+'$injector', '$filter', function($interpolate, validationConfig, $injector, $filter) {
 
   var displayErrorAsAttrName = 'bsDisplayErrorAs';
   var customFormGroup = '[bs-form-group]';
@@ -170,6 +170,7 @@ angular.module('bootstrap.angular.validation').factory('BsValidationService', ['
 
     resolveMessage: function($element, $attr, key) {
       var metaInformation = this.getMetaInformation($element);
+      var messageFilters = $element.attr(key + '-notification-filter') || validationConfig.getMessageFilters();
       var message = $element.attr(key + '-notification') || validationConfig.messages[key];
 
       if (!message) {
@@ -179,6 +180,22 @@ angular.module('bootstrap.angular.validation').factory('BsValidationService', ['
         message = 'Please fix this field';
       }
 
+      if (angular.isDefined(messageFilters)) {
+        if (!angular.isArray(messageFilters)) {
+          messageFilters = [messageFilters];
+        }
+
+        for (var i = 0; i < messageFilters.length; i++) {
+          var filter = $filter(messageFilters[i]);
+
+          if (!angular.isDefined(filter) || filter === null) {
+            throw 'The specified message filter \'' + messageFilters[i] + '\' does not exist.';
+          }
+
+          message = filter(message);
+        }
+      }
+
       var matchers = angular.extend({}, {validValue: $attr[key]}, metaInformation);
       return $interpolate(message)(matchers);
     },