Hook EarlyJsErrorHandler

Summary:
Hoop up EarlyJsErrorHandler so we could pass js error data to object-c to report.

Changelog:
[iOS][Chagned] - Add function to report early js errors

Reviewed By: RSNara

Differential Revision: D34096343

fbshipit-source-id: fdbc6ea5d1f3cc6ab55fcd22b48bbe8fb1f1ca8f

React/CoreModules/RCTExceptionsManager.h

@@ -6,8 +6,8 @@
  */
 
 #import <Foundation/Foundation.h>
-
 #import <React/RCTBridgeModule.h>
+#import <string>
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -37,6 +37,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)reportFatalException:(nullable NSString *)message
                        stack:(nullable NSArray<NSDictionary *> *)stack
                  exceptionId:(double)exceptionId;
+- (void)reportEarlyJsException:(std::string)errorMap;
 
 @property (nonatomic, weak) id<RCTExceptionsManagerDelegate> delegate;
 

React/CoreModules/RCTExceptionsManager.mm

@@ -138,6 +138,27 @@ - (void)reportFatal:(NSString *)message stack:(NSArray<NSDictionary *> *)stack e
   }
 }
 
+- (void)reportEarlyJsException:(std::string)errorMap
+{
+  NSString *errprStr = [NSString stringWithUTF8String:errorMap.c_str()];
+  NSData *jsonData = [errprStr dataUsingEncoding:NSUTF8StringEncoding];
+  NSError *jsonError;
+  NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:jsonData
+                                                       options:NSJSONWritingPrettyPrinted
+                                                         error:&jsonError];
+
+  NSString *message = [dict objectForKey:@"message"];
+  double exceptionId = [[dict objectForKey:@"id"] doubleValue];
+  NSArray *stack = [dict objectForKey:@"stack"];
+  BOOL isFatal = [[dict objectForKey:@"isFatal"] boolValue];
+
+  if (isFatal) {
+    [self reportFatalException:message stack:stack exceptionId:exceptionId];
+  } else {
+    [self reportSoftException:message stack:stack exceptionId:exceptionId];
+  }
+}
+
 - (std::shared_ptr<facebook::react::TurboModule>)getTurboModule:
     (const facebook::react::ObjCTurboModule::InitParams &)params
 {