feat: first take at UI app

lib/bds/desktop/router.ex

@@ -0,0 +1,49 @@
+defmodule BDS.Desktop.Router do
+  @moduledoc false
+
+  use Plug.Router
+
+  plug :put_secret_key_base
+
+  plug Plug.Session,
+    store: :cookie,
+    key: "_bds_desktop_key",
+    signing_salt: "desktop-shell"
+
+  plug :match
+  plug Desktop.Auth
+
+  plug Plug.Static,
+    at: "/assets",
+    from: {:bds, "priv/ui"},
+    only: ["app.css", "app.js"]
+
+  plug :dispatch
+
+  get "/" do
+    conn
+    |> Plug.Conn.put_resp_content_type("text/html")
+    |> Plug.Conn.send_resp(200, BDS.Desktop.ShellController.index_html())
+  end
+
+  get "/health" do
+    Plug.Conn.send_resp(conn, 200, "ok")
+  end
+
+  match _ do
+    Plug.Conn.send_resp(conn, 404, "not found")
+  end
+
+  defp put_secret_key_base(conn, _opts) do
+    if conn.secret_key_base do
+      conn
+    else
+      %{conn | secret_key_base: desktop_secret_key_base()}
+    end
+  end
+
+  defp desktop_secret_key_base do
+    Application.get_env(:bds, :desktop)[:secret_key_base] ||
+      raise "missing :desktop secret_key_base configuration"
+  end
+end