React Native Contacts API Integration

ContactsManager.h

//
//  ContactsManager.h
//  mewants
//
//  Created by Daryl Rowland on 31/03/2015.
//

#import "RCTBridgeModule.h"

@interface ContactsManager: NSObject<RCTBridgeModule>
@end

ContactsManager.m

//
//  ContactsManager.m
//  mewants
//
//  Created by Daryl Rowland on 31/03/2015.
//

#import "ContactsManager.h"
@import AddressBook;

@implementation ContactsManager


-(void)requestAccessToContacts:(RCTResponseSenderBlock)callback {
    RCT_EXPORT();
    ABAddressBookRequestAccessWithCompletion(ABAddressBookCreateWithOptions(NULL, nil), ^(bool granted, CFErrorRef error) {
        if (!granted){
            callback(@[@"Access to contacts not granted"]);
        }

        callback(@[[NSNull null], @"Access to contacts granted"]);
    });
}

-(void)listAllContacts:(RCTResponseSenderBlock)callback {
    RCT_EXPORT();
    
    CFErrorRef *error = NULL;
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, error);
    CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);
    CFIndex numberOfPeople = ABAddressBookGetPersonCount(addressBook);
    
    NSMutableArray *allContacts =  [NSMutableArray new];
    
    for(int i = 0; i < numberOfPeople; i++) {
        
        ABRecordRef person = CFArrayGetValueAtIndex( allPeople, i );
        
        
        NSString *firstName = (__bridge NSString *)(ABRecordCopyValue(person, kABPersonFirstNameProperty));
        NSString *lastName = (__bridge NSString *)(ABRecordCopyValue(person, kABPersonLastNameProperty));
        
        BOOL hasName = false;
        
        NSMutableDictionary *personObj = [NSMutableDictionary new];
        
        if (firstName) {
            [personObj setObject: firstName forKey:@"firstName"];
            hasName = true;
        }
        
        if (lastName) {
            [personObj setObject: lastName forKey:@"lastName"];
            hasName = true;
        }
        
        if (hasName) {
            // Only add to address book if the person has a name and number
            
            ABMultiValueRef phoneNumbers = ABRecordCopyValue(person, kABPersonPhoneProperty);
            NSMutableArray *phoneNumberArray = [NSMutableArray new];
            
            for (CFIndex i = 0; i < ABMultiValueGetCount(phoneNumbers); i++) {
                NSString *phoneNumber = (__bridge_transfer NSString *) ABMultiValueCopyValueAtIndex(phoneNumbers, i);
                [phoneNumberArray addObject:phoneNumber];
            }
            
            if (phoneNumberArray.count > 0) {
                [personObj setObject: phoneNumberArray forKey:@"phoneNumbers"];
                
                
                if (hasName && ABPersonHasImageData(person)) {
                    CFDataRef photoData = ABPersonCopyImageData(person);
                    
                    NSData* data = (__bridge NSData*)photoData;
                    // write to temp directory and store URI in photos array
                    // get the temp directory path
                    
                    // Write to docs directory
                    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                    NSString *docsPath = [paths objectAtIndex:0]; //Get the docs directory
                    
                    //NSString* docsPath = [NSTemporaryDirectory()stringByStandardizingPath];
                    
                    NSError* err = nil;
                    NSString* filePath = [NSString stringWithFormat:@"%@/photo_XXXXX", docsPath];
                    char template[filePath.length + 1];
                    strcpy(template, [filePath cStringUsingEncoding:NSASCIIStringEncoding]);
                    mkstemp(template);
                    filePath = [[NSFileManager defaultManager]
                                stringWithFileSystemRepresentation:template
                                length:strlen(template)];
                    
                    // save file
                    if ([data writeToFile:filePath options:NSAtomicWrite error:&err]) {
                        [personObj setObject: filePath forKey:@"photoUrl"];
                    }
                    
                    CFRelease(photoData);
                }
                
                
                [allContacts addObject:personObj];
            }
        }
    }

    callback(@[[NSNull null], allContacts]);
    
}

@end

example.js

var ContactsManager = require("NativeModules").ContactsManager;

module.exports = {
    getAllContacts: function(callback) {
      // Request access to the contacts API
        ContactsManager.requestAccessToContacts(function(err, result) {
            if (err) {
              // Access not granted
                return callback(err);
            } else {
                ContactsManager.listAllContacts(function(err, contacts) {
                    callback(err, contacts);
                });
            }
        });
    }
}