RHAddressBook::people - Duplicate entries for linked contacts about rhaddressbook HOT 3 OPEN

-(NSArray*)unifiedPeople;
-(NSArray*)unifiedPeoplePreferringSource:(RHSource*)source;

-(NSArray*)peopleUnifiedUsingDefaultSource;
-(NSArray*)peopleUnifiedUsingSource:(RHSource*)source;

-(NSArray *)unifyPeople:(NSArray *)people
            usingSource:(RHSource *)source
{
    // Ref: http://stackoverflow.com/questions/11351454/dealing-with-duplicate-contacts-due-to-linked-cards-in-ios-address-book-api

    int defaultSourceID = (int)source.addressBook.defaultSource.recordID;
    int wantedSourceID = (int)source.recordID;

    NSPredicate *recordIdMatchesDefault = [NSPredicate predicateWithFormat:@"%K = %d",
                                           @"inSource.recordID",
                                           defaultSourceID];
    NSPredicate *recordIdMatchesSource = [NSPredicate predicateWithFormat:@"%K = %d",
                                          @"inSource.recordID",
                                          wantedSourceID];

    NSMutableOrderedSet *unifiedPeopleSet = [NSMutableOrderedSet orderedSet];
    NSMutableOrderedSet *unifiedPeopleForSourceSet = [NSMutableOrderedSet orderedSet];

    // Create set of unified contacts
    for (RHPerson *person in people)
    {
        NSMutableSet *contactSet = [NSMutableSet set];

        [contactSet addObject:person];
        [contactSet addObjectsFromArray:person.linkedPeople];

        [unifiedPeopleSet addObject:contactSet];
    }

    // Filter the set for our desired source (or default)
    for (NSSet *contactSet in unifiedPeopleSet)
    {
        RHPerson *uniquePerson = nil;
        NSSet *wantedSet = [contactSet filteredSetUsingPredicate:recordIdMatchesSource];
        NSSet *defaultSet = [contactSet filteredSetUsingPredicate:recordIdMatchesDefault];

        if (wantedSet.count >= 1)
        {
            uniquePerson = wantedSet.anyObject;
        }
        else if (defaultSet.count >= 1)
        {
            uniquePerson = defaultSet.anyObject;
        }
        else
        {
            uniquePerson = contactSet.anyObject;
        }

        [unifiedPeopleForSourceSet addObject:uniquePerson];
    }

    return [unifiedPeopleForSourceSet array];
}