Auto-invite Matrix user

Author: Mihai - Alexandru Chindriș

apps/webhook-receiver/.env.example

@@ -3,7 +3,8 @@ MYMX_WEBHOOK_SECRET=replace_me
 EVENT_STORE=../../data/events.jsonl
 RULES_PATH=../../rules.json
 NOTIFY_THRESHOLD=60
-MATRIX_HOMESERVER=https://matrix.beeper.com
+MATRIX_HOMESERVER=https://matrix-client.matrix.org
 MATRIX_ACCESS_TOKEN=replace_me
-MATRIX_ROOM_ID=!roomid:beeper.local
+MATRIX_ROOM_ID=
 MATRIX_ROOM_STORE=../../data/matrix-room.json
+MATRIX_INVITE_USER=@your-main-account:matrix.org

apps/webhook-receiver/src/server.ts

@@ -16,6 +16,7 @@ const matrixHomeserver = process.env.MATRIX_HOMESERVER || "https://matrix.beeper
 const matrixAccessToken = process.env.MATRIX_ACCESS_TOKEN || "";
 let matrixRoomId = process.env.MATRIX_ROOM_ID || "";
 const matrixRoomStore = process.env.MATRIX_ROOM_STORE || "./matrix-room.json";
+const matrixInviteUser = process.env.MATRIX_INVITE_USER || "";
 
 if (!secret) {
   throw new Error("Missing MYMX_WEBHOOK_SECRET");
@@ -189,9 +190,26 @@ async function ensureMatrixRoom(): Promise<boolean> {
 
   matrixRoomId = roomId;
   saveRoomId(roomId);
+
+  if (matrixInviteUser) {
+    await inviteMatrixUser(roomId, matrixInviteUser);
+  }
   return true;
 }
 
+async function inviteMatrixUser(roomId: string, userId: string): Promise<boolean> {
+  const url = `${matrixHomeserver}/_matrix/client/v3/rooms/${encodeURIComponent(
+    roomId
+  )}/invite?access_token=${encodeURIComponent(matrixAccessToken)}`;
+  const payload = { user_id: userId };
+  const resp = await fetch(url, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(payload),
+  });
+  return resp.ok;
+}
+
 // MyMX needs raw text body to verify signatures.
 app.use(
   express.text({