Push Notifications error patch for React Native in iOS

RCTPushNotificationManager.h

// Push notification manager from react-native 0.28, plus patch to handle errors correctly:
// https://github.com/facebook/react-native/pull/4277

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#import "RCTEventEmitter.h"

@interface RCTPushNotificationManager : RCTEventEmitter

+ (void)didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings;
+ (void)didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken;
+ (void)didReceiveRemoteNotification:(NSDictionary *)notification;
+ (void)didReceiveLocalNotification:(UILocalNotification *)notification;
+ (void)didFailToRegisterForRemoteNotificationsWithError:(NSError *)error;

@end

RCTPushNotificationManager.m

// Push notification manager from react-native 0.28, plus patch to handle errors correctly:
// https://github.com/facebook/react-native/pull/4277

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#import "RCTPushNotificationManager.h"

#import "RCTBridge.h"
#import "RCTConvert.h"
#import "RCTEventDispatcher.h"
#import "RCTUtils.h"

#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0

#define UIUserNotificationTypeAlert UIRemoteNotificationTypeAlert
#define UIUserNotificationTypeBadge UIRemoteNotificationTypeBadge
#define UIUserNotificationTypeSound UIRemoteNotificationTypeSound
#define UIUserNotificationTypeNone  UIRemoteNotificationTypeNone
#define UIUserNotificationType      UIRemoteNotificationType

#endif

NSString *const RCTLocalNotificationReceived = @"LocalNotificationReceived";
NSString *const RCTRemoteNotificationReceived = @"RemoteNotificationReceived";
NSString *const RCTRemoteNotificationsRegistered = @"RemoteNotificationsRegistered";
NSString *const RCTRegisterUserNotificationSettings = @"RegisterUserNotificationSettings";

NSString *const RCTErrorUnableToRequestPermissions = @"E_UNABLE_TO_REQUEST_PERMISSIONS";

@interface RCTPushNotificationManager ()
@property (nonatomic, copy) RCTPromiseResolveBlock requestPermissionsResolveBlock;
@end

@implementation RCTConvert (UILocalNotification)

+ (UILocalNotification *)UILocalNotification:(id)json
{
  NSDictionary<NSString *, id> *details = [self NSDictionary:json];
  UILocalNotification *notification = [UILocalNotification new];
  notification.fireDate = [RCTConvert NSDate:details[@"fireDate"]] ?: [NSDate date];
  notification.alertBody = [RCTConvert NSString:details[@"alertBody"]];
  notification.alertAction = [RCTConvert NSString:details[@"alertAction"]];
  notification.soundName = [RCTConvert NSString:details[@"soundName"]] ?: UILocalNotificationDefaultSoundName;
  notification.userInfo = [RCTConvert NSDictionary:details[@"userInfo"]];
  notification.category = [RCTConvert NSString:details[@"category"]];
  if (details[@"applicationIconBadgeNumber"]) {
    notification.applicationIconBadgeNumber = [RCTConvert NSInteger:details[@"applicationIconBadgeNumber"]];
  }
  return notification;
}

@end

@implementation RCTPushNotificationManager

RCT_EXPORT_MODULE()

- (void)startObserving
{
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleLocalNotificationReceived:)
                                               name:RCTLocalNotificationReceived
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleRemoteNotificationReceived:)
                                               name:RCTRemoteNotificationReceived
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleRemoteNotificationsRegistered:)
                                               name:RCTRemoteNotificationsRegistered
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleRegisterUserNotificationSettings:)
                                               name:RCTRegisterUserNotificationSettings
                                             object:nil];
}

- (void)stopObserving
{
  [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (NSArray<NSString *> *)supportedEvents
{
  return @[@"localNotificationReceived",
           @"remoteNotificationReceived",
           @"remoteNotificationsRegistered"];
}

// TODO: Once all JS call sites for popInitialNotification have
// been removed we can get rid of this
- (NSDictionary<NSString *, id> *)constantsToExport
{
  NSDictionary<NSString *, id> *initialNotification =
  [self.bridge.launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] copy];
  return @{@"initialNotification": RCTNullIfNil(initialNotification)};
}

+ (void)didRegisterUserNotificationSettings:(__unused UIUserNotificationSettings *)notificationSettings
{
  if ([UIApplication instancesRespondToSelector:@selector(registerForRemoteNotifications)]) {
    [[UIApplication sharedApplication] registerForRemoteNotifications];
    [[NSNotificationCenter defaultCenter] postNotificationName:RCTRegisterUserNotificationSettings
                                                        object:self
                                                      userInfo:@{@"notificationSettings": notificationSettings}];
  }
}

+ (void)didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
  NSMutableString *hexString = [NSMutableString string];
  NSUInteger deviceTokenLength = deviceToken.length;
  const unsigned char *bytes = deviceToken.bytes;
  for (NSUInteger i = 0; i < deviceTokenLength; i++) {
    [hexString appendFormat:@"%02x", bytes[i]];
  }
  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRemoteNotificationsRegistered
                                                      object:self
                                                    userInfo:@{@"deviceToken" : [hexString copy]}];
}

+ (void)didReceiveRemoteNotification:(NSDictionary *)notification
{
  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRemoteNotificationReceived
                                                      object:self
                                                    userInfo:notification];
}

+ (void)didReceiveLocalNotification:(UILocalNotification *)notification
{
  NSMutableDictionary *details = [NSMutableDictionary new];
  if (notification.alertBody) {
    details[@"alertBody"] = notification.alertBody;
  }
  if (notification.userInfo) {
    details[@"userInfo"] = RCTJSONClean(notification.userInfo);
  }
  [[NSNotificationCenter defaultCenter] postNotificationName:RCTLocalNotificationReceived
                                                      object:self
                                                    userInfo:details];
}

+ (void)didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
  NSDictionary *errorInfo = @{
                              @"error" : @YES,
                              @"info": RCTJSErrorFromNSError(error)
                              };
  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRemoteNotificationsRegistered
                                                      object:self
                                                    userInfo:errorInfo];
}

- (void)handleLocalNotificationReceived:(NSNotification *)notification
{
  [self sendEventWithName:@"localNotificationReceived" body:notification.userInfo];
}

- (void)handleRemoteNotificationReceived:(NSNotification *)notification
{
  [self sendEventWithName:@"remoteNotificationReceived" body:notification.userInfo];
}

- (void)handleRemoteNotificationsRegistered:(NSNotification *)notification
{
  [self sendEventWithName:@"remoteNotificationsRegistered" body:notification.userInfo];
}

- (void)handleRegisterUserNotificationSettings:(NSNotification *)notification
{
  if (self.requestPermissionsResolveBlock == nil) {
    return;
  }
  
  UIUserNotificationSettings *notificationSettings = notification.userInfo[@"notificationSettings"];
  NSDictionary *notificationTypes = @{
                                      @"alert": @((notificationSettings.types & UIUserNotificationTypeAlert) > 0),
                                      @"sound": @((notificationSettings.types & UIUserNotificationTypeSound) > 0),
                                      @"badge": @((notificationSettings.types & UIUserNotificationTypeBadge) > 0),
                                      };
  
  self.requestPermissionsResolveBlock(notificationTypes);
  self.requestPermissionsResolveBlock = nil;
}

/**
 * Update the application icon badge number on the home screen
 */
RCT_EXPORT_METHOD(setApplicationIconBadgeNumber:(NSInteger)number)
{
  RCTSharedApplication().applicationIconBadgeNumber = number;
}

/**
 * Get the current application icon badge number on the home screen
 */
RCT_EXPORT_METHOD(getApplicationIconBadgeNumber:(RCTResponseSenderBlock)callback)
{
  callback(@[@(RCTSharedApplication().applicationIconBadgeNumber)]);
}

RCT_EXPORT_METHOD(requestPermissions:(NSDictionary *)permissions
                  resolver:(RCTPromiseResolveBlock)resolve
                  rejecter:(RCTPromiseRejectBlock)reject)
{
  if (RCTRunningInAppExtension()) {
    reject(RCTErrorUnableToRequestPermissions, nil, RCTErrorWithMessage(@"Requesting push notifications is currently unavailable in an app extension"));
    return;
  }
  
  if (self.requestPermissionsResolveBlock != nil) {
    RCTLogError(@"Cannot call requestPermissions twice before the first has returned.");
    return;
  }
  
  self.requestPermissionsResolveBlock = resolve;
  
  UIUserNotificationType types = UIUserNotificationTypeNone;
  if (permissions) {
    if ([RCTConvert BOOL:permissions[@"alert"]]) {
      types |= UIUserNotificationTypeAlert;
    }
    if ([RCTConvert BOOL:permissions[@"badge"]]) {
      types |= UIUserNotificationTypeBadge;
    }
    if ([RCTConvert BOOL:permissions[@"sound"]]) {
      types |= UIUserNotificationTypeSound;
    }
  } else {
    types = UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound;
  }
  
  UIApplication *app = RCTSharedApplication();
  if ([app respondsToSelector:@selector(registerUserNotificationSettings:)]) {
    UIUserNotificationSettings *notificationSettings =
    [UIUserNotificationSettings settingsForTypes:(NSUInteger)types categories:nil];
    [app registerUserNotificationSettings:notificationSettings];
  } else {
    [app registerForRemoteNotificationTypes:(NSUInteger)types];
  }
}

RCT_EXPORT_METHOD(abandonPermissions)
{
  [RCTSharedApplication() unregisterForRemoteNotifications];
}

RCT_EXPORT_METHOD(checkPermissions:(RCTResponseSenderBlock)callback)
{
  if (RCTRunningInAppExtension()) {
    callback(@[@{@"alert": @NO, @"badge": @NO, @"sound": @NO}]);
    return;
  }
  
  NSUInteger types = 0;
  if ([UIApplication instancesRespondToSelector:@selector(currentUserNotificationSettings)]) {
    types = [RCTSharedApplication() currentUserNotificationSettings].types;
  } else {
    
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0
    
    types = [RCTSharedApplication() enabledRemoteNotificationTypes];
    
#endif
    
  }
  
  callback(@[@{
               @"alert": @((types & UIUserNotificationTypeAlert) > 0),
               @"badge": @((types & UIUserNotificationTypeBadge) > 0),
               @"sound": @((types & UIUserNotificationTypeSound) > 0),
               }]);
}

RCT_EXPORT_METHOD(presentLocalNotification:(UILocalNotification *)notification)
{
  [RCTSharedApplication() presentLocalNotificationNow:notification];
}

RCT_EXPORT_METHOD(scheduleLocalNotification:(UILocalNotification *)notification)
{
  [RCTSharedApplication() scheduleLocalNotification:notification];
}

RCT_EXPORT_METHOD(cancelAllLocalNotifications)
{
  [RCTSharedApplication() cancelAllLocalNotifications];
}

RCT_EXPORT_METHOD(cancelLocalNotifications:(NSDictionary *)userInfo)
{
  for (UILocalNotification *notification in [UIApplication sharedApplication].scheduledLocalNotifications) {
    __block BOOL matchesAll = YES;
    NSDictionary *notificationInfo = notification.userInfo;
    [userInfo enumerateKeysAndObjectsUsingBlock:^(NSString *key, id obj, BOOL *stop) {
      if (![notificationInfo[key] isEqual:obj]) {
        matchesAll = NO;
        *stop = YES;
      }
    }];
    if (matchesAll) {
      [[UIApplication sharedApplication] cancelLocalNotification:notification];
    }
  }
}

RCT_EXPORT_METHOD(getInitialNotification:(RCTPromiseResolveBlock)resolve
                  reject:(__unused RCTPromiseRejectBlock)reject)
{
  NSDictionary<NSString *, id> *initialNotification =
  [self.bridge.launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] copy];
  resolve(RCTNullIfNil(initialNotification));
}

@end