fix: return to original page after login (algora-io#101)

Signed-off-by: bryans-go <[email protected]>

lib/algora_web/controllers/redirect_controller.ex

@@ -1,15 +1,17 @@
 defmodule AlgoraWeb.RedirectController do
   use AlgoraWeb, :controller
 
-  import AlgoraWeb.UserAuth, only: [fetch_current_user: 2]
+  import AlgoraWeb.UserAuth, only: [fetch_current_user: 2, maybe_store_return_to: 1]
 
   plug :fetch_current_user
 
   def redirect_authenticated(conn, _) do
     if conn.assigns.current_user do
       AlgoraWeb.UserAuth.redirect_if_user_is_authenticated(conn, [])
     else
-      redirect(conn, to: ~p"/auth/login")
+      conn
+      |> maybe_store_return_to()
+      |> redirect(to: ~p"/auth/login")
     end
   end
 end

lib/algora_web/controllers/user_auth.ex

@@ -157,13 +157,13 @@ defmodule AlgoraWeb.UserAuth do
     end
   end
 
-  defp maybe_store_return_to(%{method: "GET"} = conn) do
+  def maybe_store_return_to(%{method: "GET"} = conn) do
     %{request_path: request_path, query_string: query_string} = conn
     return_to = if query_string == "", do: request_path, else: request_path <> "?" <> query_string
     put_session(conn, :user_return_to, return_to)
   end
 
-  defp maybe_store_return_to(conn), do: conn
+  def maybe_store_return_to(conn), do: conn
 
   def signed_in_path(_conn), do: "/"
 end