couchdb-changes-stream: add limit title and body length

services/message-delivery-method-web-push/src/server.ts

@@ -11,6 +11,10 @@ const abortController = new AbortController();
 
 startHealthServer(abortController);
 
+function limitStringLengthWithEllipsis(str: string, maxLength: number): string {
+  return str.length > maxLength ? str.substring(0, maxLength) + "…" : str;
+}
+
 const start = async () => {
   await setupVapidDetails();
   const serviceSeqTracker = await ServiceSeqTracker.Init(
@@ -76,13 +80,21 @@ const start = async () => {
           try {
             const subscription = row.doc!.subscription;
             const topic = `chat-${msgDoc.qr_code_uri}-${msgDoc.chat}`;
-            const tag = `${topic}-${(new Date(msgDoc.created_at).getTime() - new Date(qrDoc.created_at).getTime()).toString(36)}`;
+            const timestamp = new Date(msgDoc.created_at).getTime();
+            const tag = `${topic}-${(timestamp - new Date(qrDoc.created_at).getTime()).toString(36)}`;
 
-            const options: NotificationOptions = {
+            const title = limitStringLengthWithEllipsis(
+              `${qrDoc.name}: новое сообщение`,
+              53,
+            );
+            const body = limitStringLengthWithEllipsis(msgDoc.body, 470);
+
+            const options: NotificationOptions & { timestamp: number } = {
               icon: "/images/qr-code-logo-200x200.jpg",
-              body: msgDoc.body,
+              body,
               tag,
               requireInteraction: true,
+              timestamp,
               data: {
                 url: `/manage/${msgDoc.qr_code_uri}/chat/${msgDoc.chat}`,
                 payload: { tag },
@@ -94,7 +106,7 @@ const start = async () => {
               JSON.stringify({
                 type: "notification",
                 notification: {
-                  title: qrDoc.name,
+                  title,
                   options,
                 },
               }),