Add alias creation endpoint

lib/matrix_server_web/controllers/aliases_controller.ex

@@ -0,0 +1,22 @@
+defmodule MatrixServerWeb.AliasesController do
+  use MatrixServerWeb, :controller
+
+  import MatrixServerWeb.Plug.Error
+
+  alias MatrixServer.Alias
+
+  def create(conn, %{"alias" => alias, "room_id" => room_id}) do
+    case Alias.create(alias, room_id) do
+      {:ok, _} ->
+        conn
+        |> put_status(200)
+        |> json(%{})
+
+      {:error, cs} ->
+        put_error(conn, Alias.get_error(cs))
+    end
+  end
+
+  # TODO: create error view for this?
+  def create(conn, _), do: put_error(conn, :bad_json)
+end

lib/matrix_server_web/plug/error.ex

@@ -10,11 +10,15 @@ defmodule MatrixServerWeb.Plug.Error do
     unrecognized: {400, "M_UNRECOGNIZED", "Unrecognized request."},
     unknown: {400, "M_UNKNOWN", "An unknown error occurred."},
     invalid_room_state:
-      {400, "M_INVALID_ROOM_STATE", "The request would result in and invalid room state."},
+      {400, "M_INVALID_ROOM_STATE", "The request would leave the room in an invalid state."},
     unknown_token: {401, "M_UNKNOWN_TOKEN", "Invalid access token."},
-    missing_token: {401, "M_MISSING_TOKEN", "Access token required."}
+    missing_token: {401, "M_MISSING_TOKEN", "Access token required."},
+    not_found: {404, "M_NOT_FOUND", "The requested resource was not found."},
+    room_alias_exists: {409, "M.UNKNOWN", "The given room alias already exists."}
   }
 
+  def put_error(conn, {error, msg}), do: put_error(conn, error, msg)
+
   def put_error(conn, error, msg \\ nil) do
     {status, errcode, default_msg} = @error_map[error]
     data = %{errcode: errcode, error: msg || default_msg}

lib/matrix_server_web/router.ex

@@ -33,6 +33,10 @@ defmodule MatrixServerWeb.Router do
       post "/logout", AccountController, :logout
       post "/logout/all", AccountController, :logout_all
       post "/createRoom", RoomController, :create
+
+      scope "/directory/room" do
+        put "/:alias", AliasesController, :create
+      end
     end
   end