Update matrixBot.js

Author: RantsRoamer

lib/matrixBot.js

@@ -1,5 +1,6 @@
 'use strict';
 
+const fs = require('fs');
 const path = require('path');
 const { getConfig } = require('./config.js');
 const chatStore = require('./chatStore.js');
@@ -20,6 +21,25 @@ function normalizeHomeserverUrl(url) {
   return u;
 }
 
+function getPersistentMatrixDeviceId() {
+  const dataDir = path.join(__dirname, '..', 'data');
+  const file = path.join(dataDir, 'matrix-device-id.txt');
+  try {
+    if (!fs.existsSync(dataDir)) fs.mkdirSync(dataDir, { recursive: true });
+    if (fs.existsSync(file)) {
+      const existing = fs.readFileSync(file, 'utf8').trim();
+      if (/^[A-Z0-9]{6,16}$/.test(existing)) return existing;
+    }
+    const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+    let id = '';
+    for (let i = 0; i < 10; i += 1) id += alphabet[Math.floor(Math.random() * alphabet.length)];
+    fs.writeFileSync(file, id, 'utf8');
+    return id;
+  } catch (_) {
+    return '';
+  }
+}
+
 function matrixUsernameForSender(sender) {
   if (!sender || typeof sender !== 'string') return 'matrix_unknown';
   const local = sender.replace(/^@/, '').replace(/:/g, '_').replace(/[^a-zA-Z0-9_-]/g, '_');
@@ -41,6 +61,7 @@ async function matrixLoginWithPassword(homeserverUrl, userId, password) {
       type: 'm.id.user',
       user: userId.trim()
     },
+    device_id: getPersistentMatrixDeviceId(),
     password: String(password),
     initial_device_display_name: 'ShadowAI'
   };