added regexes

src/BirdsiteLive.Common/Regexes/HashtagRegexes.cs

@@ -0,0 +1,9 @@
+using System.Text.RegularExpressions;
+
+namespace BirdsiteLive.Common.Regexes
+{
+    public class HashtagRegexes
+    {
+        public static readonly Regex Hashtag = new Regex(@"(.)(#[a-zA-Z0-9]+)(\s|$|[.,;:!?/|-])");
+    }
+}

src/BirdsiteLive.Common/Regexes/UrlRegexes.cs

@@ -0,0 +1,9 @@
+using System.Text.RegularExpressions;
+
+namespace BirdsiteLive.Common.Regexes
+{
+    public class UrlRegexes
+    {
+        public static readonly Regex Url = new Regex(@"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?)");
+    }
+}

src/BirdsiteLive.Common/Regexes/UserRegex.cs

@@ -1,9 +0,0 @@
-using System.Text.RegularExpressions;
-
-namespace BirdsiteLive.Common.Regexes
-{
-    public class UserRegex
-    {
-        public static readonly Regex TwitterAccountRegex = new Regex(@"^[a-zA-Z0-9_]+$");
-    }
-}

src/BirdsiteLive.Common/Regexes/UserRegexes.cs

@@ -0,0 +1,10 @@
+using System.Text.RegularExpressions;
+
+namespace BirdsiteLive.Common.Regexes
+{
+    public class UserRegexes
+    {
+        public static readonly Regex TwitterAccount = new Regex(@"^[a-zA-Z0-9_]+$");
+        public static readonly Regex Mention = new Regex(@"(.)(@[a-zA-Z0-9_]+)(\s|$|[,;:!?/|-]|(. ))");
+    }
+}

src/BirdsiteLive/Controllers/UsersController.cs

@@ -62,7 +62,7 @@ namespace BirdsiteLive.Controllers
             // Ensure valid username 
             // https://help.twitter.com/en/managing-your-account/twitter-username-rules
             TwitterUser user = null;
-            if (!string.IsNullOrWhiteSpace(id) && UserRegex.TwitterAccountRegex.IsMatch(id) && id.Length <= 15)
+            if (!string.IsNullOrWhiteSpace(id) && UserRegexes.TwitterAccount.IsMatch(id) && id.Length <= 15)
                 user = _twitterUserService.GetUser(id);
 
             var acceptHeaders = Request.Headers["Accept"];

src/BirdsiteLive/Controllers/WellKnownController.cs

@@ -164,7 +164,7 @@ namespace BirdsiteLive.Controllers
 
             // Ensure valid username 
             // https://help.twitter.com/en/managing-your-account/twitter-username-rules
-            if (string.IsNullOrWhiteSpace(name) || !UserRegex.TwitterAccountRegex.IsMatch(name) || name.Length > 15 )
+            if (string.IsNullOrWhiteSpace(name) || !UserRegexes.TwitterAccount.IsMatch(name) || name.Length > 15 )
                 return NotFound();
 
             if (!string.IsNullOrWhiteSpace(domain) && domain != _settings.Domain)