Use type aliases for different ID types and add puppet type

types/types.go

@@ -0,0 +1,26 @@
+// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
+// Copyright (C) 2018 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package types
+
+// WhatsAppID is a WhatsApp JID.
+type WhatsAppID = string
+
+// MatrixUserID is the ID of a Matrix user.
+type MatrixUserID = string
+
+// MatrixRoomID is the internal room ID of a Matrix room.
+type MatrixRoomID = string