fix: Admin links are not aware of the scope where ash_admin is called (#49)

* WIP - pass 1

* Pass prefix in session map and use in page_live.ex

* Update logic and add test

lib/ash_admin/pages/page_live.ex

@@ -26,6 +26,18 @@ defmodule AshAdmin.PageLive do
         socket
       ) do
     otp_app = socket.endpoint.config(:otp_app)
+
+    prefix =
+      case prefix do
+        "/" ->
+          session["request_path"]
+
+        _ ->
+          request_path = session["request_path"]
+          [scope, _] = String.split(request_path, prefix)
+          scope <> prefix
+      end
+
     socket = assign(socket, :prefix, prefix)
 
     actor_paused =

lib/ash_admin/router.ex

@@ -90,6 +90,8 @@ defmodule AshAdmin.Router do
   def __session__(conn, [session]), do: __session__(conn, session)
 
   def __session__(conn, session) do
+    session = Map.put(session, "request_path", conn.request_path)
+
     Enum.reduce(@cookies_to_replicate, session, fn cookie, session ->
       case conn.req_cookies[cookie] do
         value when value in [nil, "", "null"] ->

test/page_live_test.exs

@@ -1,7 +1,6 @@
 defmodule AshAdmin.Test.PageLiveTest do
   use ExUnit.Case, async: false
 
-  import Plug.Conn
   import Phoenix.ConnTest
   import Phoenix.LiveViewTest
   @endpoint AshAdmin.Test.Endpoint
@@ -11,10 +10,21 @@ defmodule AshAdmin.Test.PageLiveTest do
   end
 
   test "it renders the schema by default", %{conn: conn} do
-    {:ok, _view, html} = live(conn, "/Api/Post")
+    {:ok, _view, html} = live(conn, "/api/admin")
+
+    assert html =~ "Attributes"
+    assert html =~ "body"
+    assert html =~ "String"
+
+    {:ok, _view, html} = live(conn, "/api/admin/test")
 
     assert html =~ "Attributes"
     assert html =~ "body"
     assert html =~ "String"
   end
+
+  test "it raises error when no route is found", %{conn: conn} do
+    assert_raise(Phoenix.Router.NoRouteError, fn -> live(conn, "/") end)
+    assert_raise(Phoenix.Router.NoRouteError, fn -> live(conn, "/Api/Post") end)
+  end
 end

test/support/router.ex

@@ -6,10 +6,10 @@ defmodule AshAdmin.Test.Router do
     plug(:fetch_query_params)
   end
 
-  scope "/" do
+  scope "/api" do
     pipe_through(:browser)
     import AshAdmin.Router
 
-    ash_admin("/")
+    ash_admin("/admin")
   end
 end