logo Windmill Hub
Discord
Discussions
Windmill
Login
3
Post an unencrypted message
One script reply has been approved by the moderators Verified

Post a plain text message to a Matrix chat room. The event type is "m.room.message" and the message type is "m.text".

Created by jaller94 619 days ago Viewed 8024 times
0
Submitted by jaller94 Deno
Verified 619 days ago
All edits
Permalink
1 
type Matrix = {
2 
  baseUrl: string;
3 
  token: string;
4 
};
5 
export async function main(matrix_res: Matrix, room: string, body: string) {
6 
  if (!matrix_res.token) {
7 
    throw Error("Sending a message requires an access token.");
8 
  }
9 
  const roomId = await resolveRoomAlias(matrix_res, room);
10 
  const txnId = `${Math.random()}`;
11 
  const resp = await fetch(
12 
    `${matrix_res.baseUrl}/_matrix/client/v3/rooms/${encodeURIComponent(
13 
      roomId,
14 
    )}/send/m.room.message/${txnId}`,
15 
    {
16 
      method: "PUT",
17 
      headers: {
18 
        Accept: "application/json",
19 
        Authorization: `Bearer ${matrix_res.token}`,
20 
        "Content-Type": "application/json",
21 
      },
22 
      body: JSON.stringify({
23 
        body,
24 
        msgtype: "m.text",
25 
      }),
26 
    },
27 
  );
28 
  if (!resp.ok) {
29 
    throw Error(`Failed to send message: Error HTTP${resp.status}`);
30 
  }
31 
  const eventId = (await resp.json())["event_id"];
32 
  if (typeof eventId !== "string") {
33 
    throw Error(
34 
      `Faulty Matrix server implementation: Server didn't provide event_id for this message.`,
35 
    );
36 
  }
37 
  return eventId;
38 
}
39
40 
/**
41 
 * Resolves a room alias to a room id.
42 
 * This is basically like resolving a domain name to an IP address.
43 
 */
44 
async function resolveRoomAlias(
45 
  matrix_res: Matrix,
46 
  room: string,
47 
): Promise<string> {
48 
  // Is it already a room ID?
49 
  if (room.startsWith("!")) {
50 
    return room;
51 
  }
52 
  const resp = await fetch(
53 
    `${
54 
      matrix_res.baseUrl
55 
    }/_matrix/client/v3/directory/room/${encodeURIComponent(room)}`,
56 
    {
57 
      headers: {
58 
        Accept: "application/json",
59 
        ...(matrix_res.token && {
60 
          Authorization: `Bearer ${matrix_res.token}`,
61 
        }),
62 
      },
63 
    },
64 
  );
65 
  if (!resp.ok) {
66 
    throw Error(`Failed to resolve room alias: Error HTTP${resp.status}`);
67 
  }
68 
  const roomId = (await resp.json())["room_id"];
69 
  if (typeof roomId !== "string") {
70 
    throw Error(
71 
      `Faulty Matrix server implementation: Server didn't provide room_id for this alias.`,
72 
    );
73 
  }
74 
  return roomId;
75 
}
76