Add references support

lib/ui/widgets/text_widget.dart

@@ -43,7 +43,8 @@ class TextWidget extends StatelessWidget {
   }
 
   /// Sub parse function
-  List<InlineSpan> _parseLinks(BuildContext context, String text, TextStyle style) {
+  List<InlineSpan> _parseLinks(
+      BuildContext context, String text, TextStyle style) {
     var buff = StringBuffer();
     final list = new List<InlineSpan>();
 
@@ -79,8 +80,8 @@ class TextWidget extends StatelessWidget {
         buff.write(" ");
       }
 
-      // Check if it is a user reference
-      else if(validateUserReference(word)) {
+      // Check if it is a directory reference
+      else if (validateDirectoryReference(word)) {
         changeWordType();
 
         list.add(

lib/utils/input_utils.dart

@@ -28,6 +28,6 @@ bool validateUrl(String url) {
   }
 }
 
-/// Validate user reference
-bool validateUserReference(String ref) =>
+/// Validate directory reference
+bool validateDirectoryReference(String ref) =>
     RegExp(r'@[a-zA-Z0-9]+').hasMatch(ref);