finish that a tag in topics view

app/__init__.py

@@ -3,6 +3,7 @@ from dotenv import load_dotenv
 from .models import Avatars, Users
 from .auth import digest
 from .routes.users import is_logged_in, get_active_user
+from .routes.threads import get_post_url
 from .constants import (
     PermissionLevel, permission_level_string,
     InfoboxKind, InfoboxIcons, InfoboxHTMLClass,
@@ -116,6 +117,12 @@ def create_app():
     def inject_auth():
         return {"is_logged_in": is_logged_in, "get_active_user": get_active_user, "active_user": get_active_user()}
 
+    @app.context_processor
+    def inject_funcs():
+        return {
+            'get_post_url': get_post_url,
+        }
+
     @app.template_filter("ts_datetime")
     def ts_datetime(ts, format):
         return datetime.utcfromtimestamp(ts or int(time.time())).strftime(format)