/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A class that mimics asynchronous lookups of contacts.

*/

public class ContactLookup {

    public var contacts = Contact.sampleContacts

    public init() {}

    public func lookup(displayName: String, completion: (_ contacts: [Contact]) -> Void) {

        /*

            Here we are searching through a local array of contacts. This could

            instead be an asynchronous call to a remote server.

         */

        let nameFormatter = PersonNameComponentsFormatter()

        let matchingContacts = contacts.filter { contact in

            nameFormatter.style = .medium

            if nameFormatter.string(from: contact.nameComponents) == displayName {

                return true

            }

            nameFormatter.style = .short

            if nameFormatter.string(from: contact.nameComponents) == displayName {

                return true

            }

            return false

        }

        completion(matchingContacts)

    }

    public func lookup(emailAddress: String, completion: (_ contact: Contact?) -> Void) {

        /*

            Here we are searching through a local array of contacts. This could

            instead be an asynchronous call to a remote server.

         */

        for contact in contacts where contact.emailAddress == emailAddress {

            completion(contact)

        }

        completion(nil)

    }

}