react-native-permissions/ios/Motion/RNPermissionHandlerMotion.m

#import "RNPermissionHandlerMotion.h"

@import CoreMotion;

@interface RNPermissionHandlerMotion()

@property (nonatomic, strong) CMMotionActivityManager *activityManager;
@property (nonatomic, strong) NSOperationQueue *operationQueue;

@end

@implementation RNPermissionHandlerMotion

+ (NSArray<NSString *> * _Nonnull)usageDescriptionKeys {
  return @[@"NSMotionUsageDescription"];
}

+ (NSString * _Nonnull)handlerUniqueId {
  return @"ios.permission.MOTION";
}

- (void)checkWithResolver:(void (^ _Nonnull)(RNPermissionStatus))resolve
                 rejecter:(void (^ _Nonnull)(NSError * _Nonnull))reject {
  if (![CMMotionActivityManager isActivityAvailable]) {
    return resolve(RNPermissionStatusNotAvailable);
  }

  if (@available(iOS 11.0, *)) {
    switch ([CMMotionActivityManager authorizationStatus]) {
      case CMAuthorizationStatusNotDetermined:
        return resolve(RNPermissionStatusNotDetermined);
      case CMAuthorizationStatusRestricted:
        return resolve(RNPermissionStatusRestricted);
      case CMAuthorizationStatusDenied:
        return resolve(RNPermissionStatusDenied);
      case CMAuthorizationStatusAuthorized:
        return resolve(RNPermissionStatusAuthorized);
    }
  }

  if (![RNPermissions isFlaggedAsRequested:[[self class] handlerUniqueId]]) {
    return resolve(RNPermissionStatusNotDetermined);
  }

  [self requestWithResolver:resolve rejecter:reject];
}

- (void)requestWithResolver:(void (^ _Nonnull)(RNPermissionStatus))resolve
                   rejecter:(void (^ _Nonnull)(NSError * _Nonnull))reject {
  if (![CMMotionActivityManager isActivityAvailable]) {
    return resolve(RNPermissionStatusNotAvailable);
  }

  _activityManager = [CMMotionActivityManager new];
  _operationQueue = [NSOperationQueue new];

  [_activityManager queryActivityStartingFromDate:[NSDate distantPast]
                                           toDate:[NSDate date]
                                          toQueue:_operationQueue
                                      withHandler:^(NSArray<CMMotionActivity *> * _Nullable activities, NSError * _Nullable error) {
    if (error != nil) {
      if (error.code != CMErrorNotAuthorized &&
          error.code != CMErrorMotionActivityNotAuthorized) {
        reject(error);
      } else {
        resolve(RNPermissionStatusDenied);
      }
    } else if (activities) {
      resolve(RNPermissionStatusAuthorized);
    } else {
      resolve(RNPermissionStatusNotDetermined);
    }

    self->_operationQueue = nil;
    self->_activityManager = nil;

    [RNPermissions flagAsRequested:[[self class] handlerUniqueId]];
  }];
}

@end