Trying to get Facebook social profile from AddressBook

ContactsLoader.h

@interface LocalContact : NSObject

@property (nonatomic, copy) NSString *firstName;
@property (nonatomic, copy) NSString *lastName;
@property (nonatomic, copy, readonly) NSString *fullName;

@property (nonatomic, copy) NSString *mobileNumber;
@property (nonatomic, copy) NSString *normalizedMobileNumber;

@property (nonatomic, copy) NSString *facebookID;
@property (nonatomic, copy) NSString *facebookUsername;

@end

typedef void (^ ContactsLoaderCompletionBlock)(BOOL succeeded, NSArray *contacts);

@interface ContactsLoader : NSObject

+ (instancetype)sharedLoader;

- (void)loadContacts:(ContactsLoaderCompletionBlock)completionHandler;

@end

ContactsLoader.m

//
//  ContactsLoader.m
//  Balloon
//
//  Created by Brian Hammond on 7/8/14.
//  Copyright (c) 2014 J32 Productions LLC. All rights reserved.
//

#import "ContactsLoader.h"

#import <AddressBook/AddressBook.h>

#import "NBPhoneNumberUtil.h"

@interface ContactInfo ()

@property (nonatomic, copy, readwrite) NSString *fullName;

@end

@implementation ContactInfo

- (NSString *)fullName
{
    return [NSString stringWithFormat:@"%@ %@", _firstName, _lastName];
}

- (void)setMobileNumber:(NSString *)phoneNumber
{
    _mobileNumber = [phoneNumber copy];

    if (phoneNumber.length == 0) {
        return;
    }

    NSError *error = nil;
    NBPhoneNumber *myNumber = [[NBPhoneNumberUtil sharedInstance] parse:phoneNumber defaultRegion:@"US" error:&error];
    if (error) {
        DDLogError(@"error with phone number [%@]: %@", phoneNumber, [error localizedDescription]);
        return;
    }

    error = nil;
    self.normalizedMobileNumber = [[NBPhoneNumberUtil sharedInstance] format:myNumber numberFormat:NBEPhoneNumberFormatE164 error:&error];
    if (error) {
        DDLogError(@"error with phone number [%@]: %@", phoneNumber, [error localizedDescription]);
        return;
    }
}

@end

@interface ContactsLoader ()

@property (nonatomic, copy) NSArray *contacts;  // ContactInfo

@end

@implementation ContactsLoader

+ (instancetype)sharedLoader
{
    static dispatch_once_t onceToken;
    static ContactsLoader *loader;

    dispatch_once(&onceToken, ^{
        loader = [ContactsLoader new];
    });

    return loader;
}

- (void)loadContacts:(ContactsLoaderCompletionBlock)completionHandler
{
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);

    ABAuthorizationStatus authStatus = ABAddressBookGetAuthorizationStatus();

    if (authStatus == kABAuthorizationStatusNotDetermined) {
        __weak typeof(self) weakSelf = self;

        ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) {
            if (!granted) {
                completionHandler(NO, nil);
            } else {
                [weakSelf loadContactsFromAddressBook:addressBook completionHandler:completionHandler];
            }
        });
    } else {
        [self loadContactsFromAddressBook:addressBook completionHandler:completionHandler];
    }
}

- (void)loadContactsFromAddressBook:(ABAddressBookRef)addressBook completionHandler:(ContactsLoaderCompletionBlock)completionHandler
{
    NSMutableArray *allContacts = [NSMutableArray array];

    CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);
    if (allPeople) {
        for (CFIndex i = 0; i < CFArrayGetCount(allPeople); i++) {
            ABRecordRef who = ABAddressBookGetPersonWithRecordID(addressBook, ABRecordGetRecordID(CFArrayGetValueAtIndex(allPeople, i)));

            // First/Last Name

            ContactInfo *aContact = [ContactInfo new];
            aContact.firstName = CFBridgingRelease(ABRecordCopyValue(who, kABPersonFirstNameProperty));
            aContact.lastName = CFBridgingRelease(ABRecordCopyValue(who, kABPersonLastNameProperty));

            if (!aContact.firstName || !aContact.lastName) {
                continue;
            }

            // Mobile

            ABMultiValueRef phones = ABRecordCopyValue(who, kABPersonPhoneProperty);
            if (phones) {
                for (CFIndex i = 0; i < ABMultiValueGetCount(phones); i++) {
                    NSString *mobileLabel = (NSString *)CFBridgingRelease(ABMultiValueCopyLabelAtIndex(phones, i));
                    if ([mobileLabel isEqualToString:(NSString *)kABPersonPhoneMobileLabel] ||
                        [mobileLabel isEqualToString:(NSString*)kABPersonPhoneIPhoneLabel]) {
                        aContact.mobileNumber = CFBridgingRelease(ABMultiValueCopyValueAtIndex(phones, i));
                    }
                }
                CFRelease(phones);
            }

            // Facebook: info added by iOS to each contact as a "linked person" when the user enters their Facebook credentials in Settings > Facebook.

            CFArrayRef linkedPeople = ABPersonCopyArrayOfAllLinkedPeople(who);
            if (linkedPeople) {
                for (CFIndex i = 0; i < CFArrayGetCount(linkedPeople); i++) {
                    ABRecordRef who = ABAddressBookGetPersonWithRecordID(addressBook, ABRecordGetRecordID(CFArrayGetValueAtIndex(linkedPeople, i)));

                    // Social Profile => Facebook ID

                    ABMultiValueRef socialProfiles = ABRecordCopyValue(who, kABPersonSocialProfileProperty);
                    if (socialProfiles) {
                        for (CFIndex i = 0; i < ABMultiValueGetCount(socialProfiles); i++) {
                            NSDictionary *socialProfile = CFBridgingRelease(ABMultiValueCopyValueAtIndex(socialProfiles, i));
                            NSString *serviceName = socialProfile[(NSString *)kABPersonSocialProfileServiceKey];

                            if ([serviceName isEqualToString:(NSString *)kABPersonSocialProfileServiceFacebook]) {
                                aContact.facebookID = socialProfile[@"identifier"];
                            }
                        }
                        CFRelease(socialProfiles);
                    }

                    // Facebook Messenger => Facebook Username

                    ABMultiValueRef im = ABRecordCopyValue(who,  kABPersonInstantMessageProperty);
                    if (im) {
                        for (CFIndex i = 0; i < ABMultiValueGetCount(im); i++) {
                            NSDictionary *imInfo = CFBridgingRelease(ABMultiValueCopyValueAtIndex(im, i));
                            NSString* serviceName = [imInfo objectForKey:(NSString *)kABPersonInstantMessageServiceKey];

                            if ([serviceName isEqualToString:(NSString *)kABPersonInstantMessageServiceFacebook]) {
                                aContact.facebookUsername = ([imInfo objectForKey:(NSString *)kABPersonInstantMessageUsernameKey]);
                            }
                        }

                        CFRelease(im);
                    }
                }
                
                [allContacts addObject:aContact];

                DDLogDebug(@"first=%@ last=%@ mobile=%@ fbID=%@ fbUsername=%@", aContact.firstName, aContact.lastName, aContact.normalizedMobileNumber, aContact.facebookID, aContact.facebookUsername);
                
                CFRelease(linkedPeople);
            }
        }
        
        CFRelease(allPeople);
    }

    CFRelease(addressBook);

    completionHandler(YES, allContacts);
}

@end