Fixed nil safety issue in RKSounds

React/Base/RCTConvert.h

@@ -46,6 +46,9 @@
 + (NSURL *)NSURL:(id)json;
 + (NSURLRequest *)NSURLRequest:(id)json;
 
+typedef NSURL RCTFileURL;
++ (RCTFileURL *)RCTFileURL:(id)json;
+
 + (NSDate *)NSDate:(id)json;
 + (NSTimeZone *)NSTimeZone:(id)json;
 + (NSTimeInterval)NSTimeInterval:(id)json;
@@ -95,6 +98,9 @@ typedef NSArray NSDictionaryArray;
 typedef NSArray NSURLArray;
 + (NSURLArray *)NSURLArray:(id)json;
 
+typedef NSArray RCTFileURLArray;
++ (RCTFileURLArray *)RCTFileURLArray:(id)json;
+
 typedef NSArray NSNumberArray;
 + (NSNumberArray *)NSNumberArray:(id)json;
 

React/Base/RCTConvert.m

@@ -122,6 +122,20 @@ RCT_CONVERTER(NSString *, NSString, description)
   return URL ? [NSURLRequest requestWithURL:URL] : nil;
 }
 
++ (RCTFileURL *)RCTFileURL:(id)json
+{
+  NSURL *fileURL = [self NSURL:json];
+  if (![fileURL isFileURL]) {
+    RCTLogError(@"URI must be a local file, '%@' isn't.", fileURL);
+    return nil;
+  }
+  if (![[NSFileManager defaultManager] fileExistsAtPath:fileURL.path]) {
+    RCTLogError(@"File '%@' could not be found.", fileURL);
+    return nil;
+  }
+  return fileURL;
+}
+
 + (NSDate *)NSDate:(id)json
 {
   if ([json isKindOfClass:[NSNumber class]]) {
@@ -854,6 +868,7 @@ NSArray *RCTConvertArrayValue(SEL type, id json)
 RCT_ARRAY_CONVERTER(NSString)
 RCT_ARRAY_CONVERTER(NSDictionary)
 RCT_ARRAY_CONVERTER(NSURL)
+RCT_ARRAY_CONVERTER(RCTFileURL)
 RCT_ARRAY_CONVERTER(NSNumber)
 RCT_ARRAY_CONVERTER(UIColor)