refactor auth

lib/policy_service_web/plugs/require_organization_id.ex

@@ -0,0 +1,27 @@
+defmodule PolicyServiceWeb.Plugs.RequireOrganizationId do
+  @moduledoc """
+  Ensure `X-Organization-Id` header is provided.
+
+  This plug must be used after `PolicyServiceWeb.Plugs.ExtractOrganizationId`.
+  """
+
+  @behaviour Plug
+
+  import Plug.Conn, only: [get_req_header: 2, halt: 1, send_resp: 3]
+
+  @impl Plug
+  def init(_opts), do: %{}
+
+  @impl Plug
+  def call(conn, _opts) do
+    case get_req_header(conn, "x-organization-id") do
+      [] ->
+        conn
+        |> halt()
+        |> send_resp(:bad_request, "The organization id is required")
+
+      [_org_id] ->
+        conn
+    end
+  end
+end