From c2555049595316aa04b09f4d87cae77ec3574b95 Mon Sep 17 00:00:00 2001
From: Matthew Chen <charlesmchen@gmail.com>
Date: Thu, 13 Jul 2017 14:31:12 -0400
Subject: [PATCH] Fix copy and paste of voice messages.

// FREEBIE
---
 src/Util/MIMETypeUtil.m | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Util/MIMETypeUtil.m b/src/Util/MIMETypeUtil.m
index a55c68096..5c77a0002 100644
--- a/src/Util/MIMETypeUtil.m
+++ b/src/Util/MIMETypeUtil.m
@@ -420,6 +420,12 @@ NSString *const OWSMimeTypeUnknownForTests = @"unknown/mimetype";
 
 + (nullable NSString *)fileExtensionForUTIType:(NSString *)utiType
 {
+    // Special-case the "aac" filetype we use for voice messages (for legacy reasons)
+    // to use a .m4a file extension, not .aac, since AVAudioPlayer can't handle .aac
+    // properly. Doesn't affect file contents.
+    if ([utiType isEqualToString:@"public.aac-audio"]) {
+        return @"m4a";
+    }
     CFStringRef fileExtension
         = UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)utiType, kUTTagClassFilenameExtension);
     return (__bridge_transfer NSString *)fileExtension;