Redirect to standard FE if logged in

lib/pleroma/web/plugs/static_fe_plug.ex

@@ -9,7 +9,7 @@ defmodule Pleroma.Web.Plugs.StaticFEPlug do
   def init(options), do: options
 
   def call(conn, _) do
-    if enabled?() and requires_html?(conn) do
+    if enabled?() and requires_html?(conn) and not_logged_in?(conn) do
       conn
       |> StaticFEController.call(:show)
       |> halt()
@@ -23,4 +23,7 @@ defmodule Pleroma.Web.Plugs.StaticFEPlug do
   defp requires_html?(conn) do
     Phoenix.Controller.get_format(conn) == "html"
   end
+
+  defp not_logged_in?(%{assigns: %{user: %Pleroma.User{}}}), do: false
+  defp not_logged_in?(_), do: true
 end

lib/pleroma/web/router.ex

@@ -150,6 +150,8 @@ defmodule Pleroma.Web.Router do
   end
 
   pipeline :static_fe do
+    plug(:fetch_session)
+    plug(:authenticate)
     plug(Pleroma.Web.Plugs.StaticFEPlug)
   end
 

lib/pleroma/web/static_fe/static_fe_controller.ex

@@ -180,15 +180,7 @@ defmodule Pleroma.Web.StaticFE.StaticFEController do
         nil
       end
 
-    reply_to_user =
-      if data["inReplyTo"] do
-        activity
-        |> Activity.get_in_reply_to_activity()
-        |> Map.get(:actor)
-        |> User.get_cached_by_ap_id()
-      else
-        nil
-      end
+    reply_to_user = in_reply_to_user(activity)
 
     total_votes =
       if data["oneOf"] do
@@ -217,6 +209,20 @@ defmodule Pleroma.Web.StaticFE.StaticFEController do
     }
   end
 
+  defp in_reply_to_user(%Activity{object: %Object{data: %{"inReplyTo" => inReplyTo}}} = activity) when is_binary(inReplyTo) do
+    in_reply_to_activity = Activity.get_in_reply_to_activity(activity)
+
+    if in_reply_to_activity do
+      in_reply_to_activity
+      |> Map.get(:actor)
+      |> User.get_cached_by_ap_id()
+    else
+      nil
+    end
+  end
+
+  defp in_reply_to_user(_), do: nil
+
   defp assign_id(%{path_info: ["notice", notice_id]} = conn, _opts),
     do: assign(conn, :notice_id, notice_id)