Add Discord notifications for image generation and snapshot creation

discordWebhook.js

@@ -3,6 +3,16 @@ const https = require("https");
 
 const WEBHOOK_URL = "https://discord.com/api/webhooks/1456729066924277912/zf0-cSqmU18kX-S5UZJHNwsuqKtM2i7Bp8LMCyXM80n1RsDtFQCTccBIzafghf7q-U4q";
 
+// sanitze text for discord
+function sanitizeText(text) {
+    if (!text) return "";
+
+    // remove or replace problematic characters
+    return text
+        .replace(/[\u0000-\u001F\u007F-\u009F]/g, "") // remove control chars
+        .substring(0, 1800); // limit length to avoid discord limits
+}
+
 // send notfication to discord
 function sendDiscordNotification(content, additionalData = {}) {
     if (!WEBHOOK_URL) {
@@ -15,7 +25,13 @@ function sendDiscordNotification(content, additionalData = {}) {
         ...additionalData
     };
 
-    const data = JSON.stringify(payload);
+    let data;
+    try {
+        data = JSON.stringify(payload);
+    } catch (err) {
+        console.error("Failed to stringify webhook payload:", err);
+        return Promise.resolve();
+    }
 
     const url = new URL(WEBHOOK_URL);
     const options = {
@@ -58,16 +74,17 @@ function sendDiscordNotification(content, additionalData = {}) {
 
 // notify about new image generation
 function notifyImageGenerated(config, ipAddress) {
-    const username = config.username || "@unknown";
-    const displayName = config.displayName || "Unknown User";
+    const username = sanitizeText(config.username) || "@unknown";
+    const displayName = sanitizeText(config.displayName) || "Unknown User";
 
     let content = `🖼️ **New Image Generated**\n`;
     content += `User: ${displayName} (${username})\n`;
 
     if (config.text) {
-        const shortText = config.text.length > 100
-            ? config.text.substring(0, 100) + "..."
-            : config.text;
+        const sanitized = sanitizeText(config.text);
+        const shortText = sanitized.length > 100
+            ? sanitized.substring(0, 100) + "..."
+            : sanitized;
         content += `Text: ${shortText}\n`;
     }