Ignore non-word chars in the beginning of mentions

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Hashtags followed by HTML tags "a", "code" and "pre" were not detected
 - Incorrect parsing of HTML links inside HTML tags
 - Punctuation marks in the end of urls were included in the html links
+- Incorrect parsing of mentions with symbols before them
 
 ## 0.2.0 - 2020-07-21
 

lib/linkify/parser.ex

@@ -15,7 +15,7 @@ defmodule Linkify.Parser do
 
   # @user
   # @user@example.com
-  @match_mention ~r"^@[a-zA-Z\d_-]+@[a-zA-Z0-9_-](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*|^@[a-zA-Z\d_-]+"u
+  @match_mention ~r/^(?:\W*)?(?<long>@[a-zA-Z\d_-]+@[a-zA-Z0-9_-](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)|^(?:\W*)?(?<short>@[a-zA-Z\d_-]+)/u
 
   # https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
   @match_email ~r"^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$"u
@@ -254,8 +254,9 @@ defmodule Linkify.Parser do
   def ip?(buffer), do: Regex.match?(@match_ip, buffer)
 
   def match_mention(buffer) do
-    case Regex.run(@match_mention, buffer) do
-      [mention] -> mention
+    case Regex.run(@match_mention, buffer, capture: [:long, :short]) do
+      [mention, ""] -> mention
+      ["", mention] -> mention
       _ -> nil
     end
   end

test/linkify_test.exs

@@ -386,6 +386,15 @@ defmodule LinkifyTest do
              ) == expected
     end
 
+    test "mentions with symbols before them" do
+      text = "@@example hey! >@@test@example.com"
+
+      expected =
+        "@<a href=\"/users/example\">@example</a> hey! >@<a href=\"/users/test@example.com\">@test@example.com</a>"
+
+      assert Linkify.link(text, mention: true, mention_prefix: "/users/") == expected
+    end
+
     test "invalid mentions" do
       text = "hey user@example"