Add a bbcode tag to render tag link

boards/mdx_neboard.py

@@ -160,6 +160,17 b' def render_notification(tag_name, value,'
         reverse('notifications', kwargs={'username': username}), username)
 
 
+def render_tag(tag_name, value, options, parent, context):
+    tag_name = value.lower()
+
+    try:
+        url = boards.models.Tag.objects.get(name=tag_name).get_view()
+    except ObjectDoesNotExist:
+        url = tag_name
+
+    return url
+
+
 formatters = [
     QuotePattern,
     SpoilerPattern,
@@ -188,6 +199,7 b' class Parser:'
         self.parser.add_formatter('post', render_reflink, strip=True)
         self.parser.add_formatter('quote', render_quote, strip=True)
         self.parser.add_formatter('user', render_notification, strip=True)
+        self.parser.add_formatter('tag', render_tag, strip=True)
         self.parser.add_simple_formatter(
             'comment', '<span class="comment">//%(value)s</span>')
         self.parser.add_simple_formatter(