From a61127622cd952def6ae3e79d92cca3db76d593b Mon Sep 17 00:00:00 2001
From: James Magahern <james@magahern.com>
Date: Wed, 1 Apr 2026 17:22:28 -0700
Subject: [PATCH] SendMessage: some backwards compatibility

---
 .../Operations/MBIMSendMessageOperation.m     | 125 ++++++++++++++++--
 1 file changed, 116 insertions(+), 9 deletions(-)

diff --git a/server/kordophone/Bridge/Operations/MBIMSendMessageOperation.m b/server/kordophone/Bridge/Operations/MBIMSendMessageOperation.m
index 10db1d4..5252dd7 100644
--- a/server/kordophone/Bridge/Operations/MBIMSendMessageOperation.m
+++ b/server/kordophone/Bridge/Operations/MBIMSendMessageOperation.m
@@ -21,6 +21,118 @@
     return @"sendMessage";
 }
 
+- (nullable IMChat *)_existingSingleChatForHandle:(IMHandle *)handle registry:(IMChatRegistry *)registry
+{
+    if ([registry respondsToSelector:@selector(existingChatWithHandle:allowAlternativeService:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatWithHandle:allowAlternativeService:");
+        return [registry existingChatWithHandle:handle allowAlternativeService:NO];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatWithHandle:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatWithHandle:");
+        return [registry existingChatWithHandle:handle];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatForIMHandle:allowRetargeting:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatForIMHandle:allowRetargeting:");
+        return [registry existingChatForIMHandle:handle allowRetargeting:NO];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatForIMHandle:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatForIMHandle:");
+        return [registry existingChatForIMHandle:handle];
+    }
+
+    MBIMLogError(@"IMChatRegistry does not support any known single-handle existing chat lookup selector.");
+    return nil;
+}
+
+- (nullable IMChat *)_createSingleChatForHandle:(IMHandle *)handle registry:(IMChatRegistry *)registry
+{
+    if ([registry respondsToSelector:@selector(chatWithHandle:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatWithHandle:");
+        return [registry chatWithHandle:handle];
+    }
+
+    if ([registry respondsToSelector:@selector(chatForIMHandle:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatForIMHandle:");
+        return [registry chatForIMHandle:handle];
+    }
+
+    MBIMLogError(@"IMChatRegistry does not support any known single-handle chat creation selector.");
+    return nil;
+}
+
+- (nullable IMChat *)_existingGroupChatForHandles:(NSArray<IMHandle *> *)handles registry:(IMChatRegistry *)registry
+{
+    if ([registry respondsToSelector:@selector(existingChatWithHandles:allowAlternativeService:groupID:displayName:joinedChatsOnly:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatWithHandles:allowAlternativeService:groupID:displayName:joinedChatsOnly:");
+        return [registry existingChatWithHandles:handles
+                         allowAlternativeService:NO
+                                         groupID:nil
+                                     displayName:nil
+                                 joinedChatsOnly:YES];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatWithHandles:allowAlternativeService:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatWithHandles:allowAlternativeService:");
+        return [registry existingChatWithHandles:handles allowAlternativeService:NO];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatWithHandles:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatWithHandles:");
+        return [registry existingChatWithHandles:handles];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatForIMHandles:allowRetargeting:groupID:displayName:joinedChatsOnly:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatForIMHandles:allowRetargeting:groupID:displayName:joinedChatsOnly:");
+        return [registry existingChatForIMHandles:handles
+                                 allowRetargeting:NO
+                                           groupID:nil
+                                       displayName:nil
+                                   joinedChatsOnly:YES];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatForIMHandles:allowRetargeting:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatForIMHandles:allowRetargeting:");
+        return [registry existingChatForIMHandles:handles allowRetargeting:NO];
+    }
+
+    if ([registry respondsToSelector:@selector(existingChatForIMHandles:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry existingChatForIMHandles:");
+        return [registry existingChatForIMHandles:handles];
+    }
+
+    MBIMLogError(@"IMChatRegistry does not support any known multi-handle existing chat lookup selector.");
+    return nil;
+}
+
+- (nullable IMChat *)_createGroupChatForHandles:(NSArray<IMHandle *> *)handles registry:(IMChatRegistry *)registry
+{
+    if ([registry respondsToSelector:@selector(chatWithHandles:displayName:joinedChatsOnly:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatWithHandles:displayName:joinedChatsOnly:");
+        return [registry chatWithHandles:handles displayName:nil joinedChatsOnly:YES];
+    }
+
+    if ([registry respondsToSelector:@selector(chatWithHandles:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatWithHandles:");
+        return [registry chatWithHandles:handles];
+    }
+
+    if ([registry respondsToSelector:@selector(chatForIMHandles:displayName:joinedChatsOnly:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatForIMHandles:displayName:joinedChatsOnly:");
+        return [registry chatForIMHandles:handles displayName:nil joinedChatsOnly:YES];
+    }
+
+    if ([registry respondsToSelector:@selector(chatForIMHandles:)]) {
+        MBIMLogInfo(@"Using IMChatRegistry chatForIMHandles:");
+        return [registry chatForIMHandles:handles];
+    }
+
+    MBIMLogError(@"IMChatRegistry does not support any known multi-handle chat creation selector.");
+    return nil;
+}
+
 - (nullable IMChat *)_chatForHandleIDs:(NSArray<NSString *> *)handleIDs registry:(IMChatRegistry *)registry
 {
     MBIMLogInfo(@"Resolving send target for handles: %@", handleIDs);
@@ -44,9 +156,9 @@
 
     if ([handles count] == 1) {
         IMHandle *handle = [handles firstObject];
-        IMChat *chat = [registry existingChatWithHandle:handle allowAlternativeService:NO];
+        IMChat *chat = [self _existingSingleChatForHandle:handle registry:registry];
         if (!chat) {
-            chat = [registry chatWithHandle:handle];
+            chat = [self _createSingleChatForHandle:handle registry:registry];
         }
 
         if (chat) {
@@ -58,14 +170,9 @@
         return chat;
     }
 
-    IMChat *chat = [registry existingChatWithHandles:handles
-                             allowAlternativeService:NO
-                                             groupID:nil
-                                         displayName:nil
-                                     joinedChatsOnly:YES];
-
+    IMChat *chat = [self _existingGroupChatForHandles:handles registry:registry];
     if (!chat) {
-        chat = [registry chatWithHandles:handles displayName:nil joinedChatsOnly:YES];
+        chat = [self _createGroupChatForHandles:handles registry:registry];
     }
 
     if (chat) {