Finding user's email address from "me" card in the Address Book

#import <AddressBook/AddressBook.h>

static NSString* defaultEmail() 
{
	NSString* result = @"";
	
	@try {
		ABPerson *me = [[ABAddressBook sharedAddressBook] me];
		if (me == nil) return result;
		
		ABMultiValue *emails = [me valueForProperty:kABEmailProperty];
		if (emails == nil) return result;
		
		NSString* primaryEmailId = [emails primaryIdentifier];
		NSUInteger primaryEmailIndex = NSNotFound;
		if (primaryEmailId) primaryEmailIndex = [emails indexForIdentifier:primaryEmailId];
		
		if (primaryEmailIndex != NSNotFound) result = [emails valueAtIndex:primaryEmailIndex];	
	}
	@catch (NSException* e) {
		NSLog(@"Failed to obtain the e-mail address: %@", e);
	}
	
	return result;
}