Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/LegacyComponents/Sources/TGFileUtils.m

@@ -0,0 +1,27 @@
+#import <LegacyComponents/TGFileUtils.h>
+
+#import <MobileCoreServices/MobileCoreServices.h>
+
+NSString *TGMimeTypeForFileExtension(NSString *fileExtension)
+{
+    return TGMimeTypeForFileUTI((__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)fileExtension, NULL));
+}
+
+NSString *TGMimeTypeForFileUTI(NSString *fileUTI)
+{
+    NSString *mimeType = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)fileUTI, kUTTagClassMIMEType);
+    if (mimeType == nil)
+        mimeType = @"application/octet-stream";
+    return mimeType;
+}
+
+NSString *TGTemporaryFileName(NSString *fileExtension)
+{
+    if (fileExtension == nil)
+        fileExtension = @"bin";
+    
+    int64_t randomId = 0;
+    arc4random_buf(&randomId, sizeof(randomId));
+    
+    return [NSTemporaryDirectory() stringByAppendingPathComponent:[[NSString alloc] initWithFormat:@"%" PRIx64 ".%@", randomId, fileExtension]];
+}