From a3446ff0881b5e66dbbce75da34397b828e5b654 Mon Sep 17 00:00:00 2001
From: stjet <49297268+stjet@users.noreply.github.com>
Date: Wed, 11 Feb 2026 07:40:03 +0000
Subject: [PATCH] cursed webhooks for discord sending

---
 index.ts | 37 ++++++++++++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/index.ts b/index.ts
index 7797ac8..0f2ec40 100644
--- a/index.ts
+++ b/index.ts
@@ -1,4 +1,4 @@
-import { readFileSync } from "fs";
+import { appendFileSync, readFileSync } from "fs";
 
 import * as discord from "discord.js";
 import * as matrix from "matrix-js-sdk";
@@ -31,21 +31,48 @@ matrix_client.startClient({ initialSyncLimit: 0 });
 //discord
 
 discord_client.on("messageCreate", async (message) => {
-  if (!MAPPING[message.channelId] || message.author.id === discord_client.user.id) return;
-  await matrix_client.sendEvent(MAPPING[message.channelId], matrix.EventType.RoomMessage, {
+  if (!MAPPING[message.channelId] || message.author.id === discord_client.user.id || (message.webhookId && (await message.fetchWebhook()).name === "Matrix Bridge")) return;
+  const channel_id = message.channelId;
+  let attachments = "";
+  for (const [_, a] of message.attachments) {
+    attachments += "\n" + a.url;
+  }
+  await matrix_client.sendEvent(MAPPING[channel_id], matrix.EventType.RoomMessage, {
     msgtype: matrix.MsgType.Text,
     format: "org.matrix.custom.html",
     body: `${message.author.tag}: ${message.content}`,
-    formatted_body: `<strong>${message.author.tag}:</strong> ${message.content}`,
+    formatted_body: `<strong>${message.author.tag}:</strong> ${message.content}${attachments}`,
   });
 });
 
 //matrix
 
+//authenticated media must be bypassed, see https://blog.kimiblock.top/2024/11/23/bypassing-auth-media/index.html
 matrix_client.on(matrix.RoomEvent.Timeline, async (event, room) => {
   if (event.getType() !== "m.room.message") return;
   const { sender, content, room_id } = event.event;
   if (!MAPPING[room_id] || sender === process.env.MATRIX_USER) return;
-  await (await discord_client.channels.fetch(MAPPING[room_id]) as discord.TextChannel).send(`**${sender}:** ${content.body}`);
+  const channel_id = MAPPING[room_id];
+  let webhook_id = process.env[`webhookid_${channel_id}`];
+  let webhook_token = process.env[`webhooktoken_${channel_id}`];
+  if (!webhook_id || !webhook_token) {
+    console.log("Creating new webhook");
+    const webhook = await (await discord_client.channels.fetch(MAPPING[room_id]) as discord.TextChannel).createWebhook({
+      name: "Matrix Bridge",
+    });
+    webhook_id = webhook.id;
+    process.env[`webhookid_${channel_id}`] = webhook_id;
+    webhook_token = webhook.token;
+    process.env[`webhooktoken_${channel_id}`] = webhook_token;
+    appendFileSync(".env", `\nwebhookid_${channel_id}=${webhook_id}\nwebhooktoken_${channel_id}=${webhook_token}`);
+  }
+  const webhook_client = new discord.WebhookClient({ id: webhook_id, token: webhook_token });
+  await webhook_client.send({
+    content: content.body,
+    username: sender,
+    avatarURL: event.sender.getAvatarUrl(matrix_client.getHomeserverUrl(), 128, 128, "crop", true, false).replace("media/v3", "client/v1/media"),
+  });
+  //
+  //await (await discord_client.channels.fetch(channel_id) as discord.TextChannel).send(`**${sender}:** ${content.body}`);
 });