drop synced message with the autoFR content

ts/receiver/dataMessage.ts

@@ -252,9 +252,7 @@ function isMessageEmpty(message: SignalService.DataMessage) {
   return (
     !flags &&
     // FIXME remove this hack to drop auto friend requests messages in a few weeks 15/07/2020
-    (_.isEmpty(body) ||
-      body ===
-        'Please accept to enable messages to be synced across devices') &&
+    isBodyEmpty(body) &&
     _.isEmpty(attachments) &&
     _.isEmpty(group) &&
     _.isEmpty(quote) &&
@@ -265,6 +263,16 @@ function isMessageEmpty(message: SignalService.DataMessage) {
   );
 }
 
+function isBodyEmpty(body: string) {
+  return _.isEmpty(body) || isBodyAutoFRContent(body);
+}
+
+export function isBodyAutoFRContent(body: string) {
+  return (
+    body === 'Please accept to enable messages to be synced across devices'
+  );
+}
+
 export async function handleDataMessage(
   envelope: EnvelopePlus,
   dataMessage: SignalService.IDataMessage

ts/receiver/syncMessages.ts

@@ -7,7 +7,11 @@ import ByteBuffer from 'bytebuffer';
 
 import { handleEndSession } from './sessionHandling';
 import { handleMediumGroupUpdate } from './mediumGroups';
-import { handleMessageEvent, processDecrypted } from './dataMessage';
+import {
+  handleMessageEvent,
+  isBodyAutoFRContent,
+  processDecrypted,
+} from './dataMessage';
 import { updateProfile } from './receiver';
 import { handleContacts } from './multidevice';
 import { onGroupReceived } from './groups';
@@ -84,6 +88,11 @@ async function handleSentMessage(
 
   if (!msg) {
     window.log('Inner message is missing in a sync message');
+    return;
+  }
+
+  if (msg.body && isBodyAutoFRContent(msg.body)) {
+    window.console.log('dropping autoFR message synced');
     await removeFromCache(envelope);
     return;
   }