From 12af41174a6f08ce400a325a97753d1d36b78b89 Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Fri, 10 Jul 2026 05:47:04 +0000
Subject: [PATCH] Cap mention processing in story reply and edit message paths.

---
 .../securesms/messages/DataMessageProcessor.kt             | 7 ++++---
 .../securesms/messages/EditMessageProcessor.kt             | 5 +++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/messages/DataMessageProcessor.kt b/app/src/main/java/org/thoughtcrime/securesms/messages/DataMessageProcessor.kt
index dd171f2171..98d71b9123 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/messages/DataMessageProcessor.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/messages/DataMessageProcessor.kt
@@ -122,7 +122,7 @@ import kotlin.time.Duration.Companion.seconds
 
 object DataMessageProcessor {
 
-  private const val BODY_RANGE_PROCESSING_LIMIT = 250
+  internal const val BODY_RANGE_PROCESSING_LIMIT = 250
   private const val POLL_QUESTION_CHARACTER_LIMIT = 200
   private const val POLL_CHARACTER_LIMIT = 100
   private const val POLL_OPTIONS_LIMIT = 10
@@ -791,7 +791,8 @@ object DataMessageProcessor {
         return null
       }
 
-      val bodyRanges: BodyRangeList? = message.bodyRanges.filter { Util.allAreNull(it.mentionAci, it.mentionAciBinary) }.toList().toBodyRangeList()
+      val cappedBodyRanges: List<BodyRange> = message.bodyRanges.take(BODY_RANGE_PROCESSING_LIMIT)
+      val bodyRanges: BodyRangeList? = cappedBodyRanges.filter { Util.allAreNull(it.mentionAci, it.mentionAciBinary) }.toList().toBodyRangeList()
 
       val mediaMessage = IncomingMessage(
         type = MessageType.NORMAL,
@@ -805,7 +806,7 @@ object DataMessageProcessor {
         body = message.body,
         groupId = groupId,
         quote = quoteModel,
-        mentions = getMentions(message.bodyRanges),
+        mentions = getMentions(cappedBodyRanges),
         serverGuid = UuidUtil.getStringUUID(envelope.serverGuid, envelope.serverGuidBinary),
         messageRanges = bodyRanges
       )
diff --git a/app/src/main/java/org/thoughtcrime/securesms/messages/EditMessageProcessor.kt b/app/src/main/java/org/thoughtcrime/securesms/messages/EditMessageProcessor.kt
index 5d798a429c..8c64e33239 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/messages/EditMessageProcessor.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/messages/EditMessageProcessor.kt
@@ -124,7 +124,8 @@ object EditMessageProcessor {
     message: DataMessage,
     targetMessage: MmsMessageRecord
   ): InsertResult? {
-    val messageRanges: BodyRangeList? = message.bodyRanges.filter { Util.allAreNull(it.mentionAci, it.mentionAciBinary) }.toList().toBodyRangeList()
+    val cappedBodyRanges = message.bodyRanges.take(DataMessageProcessor.BODY_RANGE_PROCESSING_LIMIT)
+    val messageRanges: BodyRangeList? = cappedBodyRanges.filter { Util.allAreNull(it.mentionAci, it.mentionAciBinary) }.toList().toBodyRangeList()
     val targetQuote = targetMessage.quote
     val quote: QuoteModel? = if (targetQuote != null && (message.quote != null || (targetMessage.parentStoryId != null && message.storyContext != null))) {
       QuoteModel(
@@ -159,7 +160,7 @@ object EditMessageProcessor {
       parentStoryId = targetMessage.parentStoryId,
       sharedContacts = emptyList(),
       linkPreviews = DataMessageProcessor.getLinkPreviews(message.preview, message.body ?: "", false),
-      mentions = DataMessageProcessor.getMentions(message.bodyRanges),
+      mentions = DataMessageProcessor.getMentions(cappedBodyRanges),
       serverGuid = UuidUtil.getStringUUID(envelope.serverGuid, envelope.serverGuidBinary),
       messageRanges = messageRanges
     )