//
//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
//

#import "SignalRecipient.h"

NS_ASSUME_NONNULL_BEGIN

@class Contact;

@interface ContactsUpdater : NSObject

+ (instancetype)sharedUpdater;

- (nullable SignalRecipient *)synchronousLookup:(NSString *)identifier error:(NSError **)error;

// This asynchronously tries to verify whether or not a contact id
// corresponds to a service account.
//
// The failure callback is invoked if the lookup fails _or_ if the
// contact id doesn't correspond to an account.
- (void)lookupIdentifier:(NSString *)identifier
                 success:(void (^)(SignalRecipient *recipient))success
                 failure:(void (^)(NSError *error))failure;

// This asynchronously tries to verify whether or not a group of possible
// contact ids correspond to service accounts.
//
// The failure callback is only invoked if the lookup fails.  Otherwise,
// the success callback is invoked with the (possibly empty) set of contacts
// that were found.
- (void)lookupIdentifiers:(NSArray<NSString *> *)identifiers
                  success:(void (^)(NSArray<SignalRecipient *> *recipients))success
                  failure:(void (^)(NSError *error))failure;

- (void)updateSignalContactIntersectionWithABContacts:(NSArray<Contact *> *)abContacts
                                              success:(void (^)())success
                                              failure:(void (^)(NSError *error))failure;

@end

NS_ASSUME_NONNULL_END