Expose webSocketDidOpen in RCTReconnectingWebSocket

Summary: Expose webSocketDidOpen in RCTReconnectingWebSocket in order to get notified when the reconnecting websocket is opened to the endpoint.

Reviewed By: emilsjolander

Differential Revision: D5725547

fbshipit-source-id: e904c5a84d670ecf936993ec1739614f99fce09c

Libraries/WebSocket/RCTReconnectingWebSocket.h

@@ -15,6 +15,8 @@
 
 @protocol RCTWebSocketProtocolDelegate
 
+- (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket;
+
 - (void)webSocket:(RCTSRWebSocket *)webSocket didReceiveMessage:(id)message;
 
 - (void)webSocket:(RCTSRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean;

Libraries/WebSocket/RCTReconnectingWebSocket.m

@@ -101,6 +101,11 @@ static void my_nwlog_legacy_v(int level, char *format, va_list args) {
   });
 }
 
+- (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket
+{
+  [self.delegate webSocketDidOpen:webSocket];
+}
+
 - (void)webSocket:(RCTSRWebSocket *)webSocket didFailWithError:(NSError *)error
 {
   [self reconnect];

Libraries/WebSocket/RCTWebSocketObserver.m

@@ -66,6 +66,10 @@
   }
 }
 
+- (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket
+{
+}
+
 - (void)webSocket:(RCTSRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean
 {
 }

React/DevSupport/RCTPackagerConnection.m

@@ -132,6 +132,10 @@ static BOOL isSupportedVersion(NSNumber *version)
   }
 }
 
+- (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket
+{
+}
+
 - (void)webSocket:(RCTSRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean
 {
 }