From 39175223b400fd7e832f2e61047e2fcee14d570f Mon Sep 17 00:00:00 2001
From: Daniel Gultsch <daniel@gultsch.de>
Date: Thu, 17 Apr 2025 10:15:55 +0200
Subject: [PATCH] add compile time config to merge bodies instead of ignoring

---
 src/main/java/eu/siacs/conversations/Config.java  |  2 ++
 .../android/xmpp/model/stanza/Message.java        | 15 ++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/main/java/eu/siacs/conversations/Config.java b/src/main/java/eu/siacs/conversations/Config.java
index 8417b20221c923aa0bf71bd0c84535bb73d9d11b..628b3c3531b389c3f6dcd623bd241f2d61e1e519 100644
--- a/src/main/java/eu/siacs/conversations/Config.java
+++ b/src/main/java/eu/siacs/conversations/Config.java
@@ -136,6 +136,8 @@ public final class Config {
 
     public static final boolean IGNORE_ID_REWRITE_IN_MUC = true;
     public static final boolean MUC_LEAVE_BEFORE_JOIN = false;
+    // if this is set to true messages that contain multiple bodies (per language) will be ignored
+    public static final boolean TREAT_MULTI_CONTENT_AS_INVALID = false;
 
     public static final long MAM_MAX_CATCHUP = MILLISECONDS_IN_DAY * 5;
     public static final int MAM_MAX_MESSAGES = 750;
diff --git a/src/main/java/im/conversations/android/xmpp/model/stanza/Message.java b/src/main/java/im/conversations/android/xmpp/model/stanza/Message.java
index dd5f7458e94937a81f4f8479decc7a91ab670915..bf64102e2e00b20d3ba8faccddeee0bd7575285f 100644
--- a/src/main/java/im/conversations/android/xmpp/model/stanza/Message.java
+++ b/src/main/java/im/conversations/android/xmpp/model/stanza/Message.java
@@ -1,7 +1,11 @@
 package im.conversations.android.xmpp.model.stanza;
 
+import com.google.common.base.Joiner;
 import com.google.common.base.Strings;
-import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Maps;
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xml.LocalizedContent;
 import im.conversations.android.annotation.XmlElement;
@@ -31,7 +35,7 @@ public class Message extends Stanza {
     }
 
     private LocalizedContent getLocalizedContent(final Class<? extends Extension> clazz) {
-        final var builder = new ImmutableMap.Builder<String, String>();
+        final var builder = new ImmutableMultimap.Builder<String, String>();
         final var messageLanguage = this.getAttribute("xml:lang");
         final var parentLanguage =
                 Strings.isNullOrEmpty(messageLanguage)
@@ -47,11 +51,12 @@ public class Message extends Stanza {
             }
             builder.put(language, content);
         }
-        try {
-            return LocalizedContent.get(builder.buildOrThrow());
-        } catch (final IllegalArgumentException e) {
+        final var multiMap = builder.build().asMap();
+        if (Config.TREAT_MULTI_CONTENT_AS_INVALID
+                && Iterables.any(multiMap.values(), v -> v.size() > 1)) {
             return null;
         }
+        return LocalizedContent.get(Maps.transformValues(multiMap, v -> Joiner.on('\n').join(v)));
     }
 
     public Type getType() {