/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Implements CNContactPickerViewController's predicateForSelectionOfProperty

  instance property. Allows users to select and return any contact property when

  using the "All Contacts" feature and specific contact properties

  (emailAddresses, postalAddresses, and phoneNumbers) when using the other features.

  Contact properties that don't meet the above criteria will be selectable and

  implement their default action, but they will not be returned.

*/

import UIKit

import ContactsUI

class ForSelectionOfPropertyViewController: BaseTableViewController {

    // MARK: - Handle All Contacts

    /// Show all contacts.

    override func handleAllContacts() {

        let picker = CNContactPickerViewController()

        picker.delegate = self

        /*

            Only show the given and family names, email addresses, phone numbers,

            and postal addresses of a contact.

        */

        picker.displayedPropertyKeys = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactEmailAddressesKey,

                                        CNContactPhoneNumbersKey, CNContactPostalAddressesKey]

        navigationController?.present(picker, animated: true, completion: nil)

    }

    // MARK: - Handle Contacts With Email Addresses

    /**

        When users select a contact's email address, it dismisses the view

        controller and returns the email address using

        CNContactPickerDelegate's contact​Picker(_:​did​Select:​). When users select

        other properties, it implements their default action.

    */

    override func handleContactsWithEmailAddresses() {

        let picker = CNContactPickerViewController()

        picker.delegate = self

        picker.predicateForSelectionOfProperty = NSPredicate(format: "(key == 'emailAddresses')")

        navigationController?.present(picker, animated: true, completion: nil)

    }

    // MARK: - Handle Contacts With Postal Addresses

    /**

        When users select a contact's postal address, it dismisses the view

        controller and returns the birthday using

        CNContactPickerDelegate's contact​Picker(_:​did​Select:​). When users select

        other properties, it implements their default action.

    */

    override func handleContactsWithPostalAddresses() {

        let picker = CNContactPickerViewController()

        picker.delegate = self

        picker.predicateForSelectionOfProperty = NSPredicate(format: "key == 'postalAddresses'")

        navigationController?.present(picker, animated: true, completion: nil)

    }

     // MARK: - Handle Contacts With Two or More Phone Numbers

    /**

        When users select a contact's phone number, it dismisses the view

        controller and returns the phone number using

        CNContactPickerDelegate's contact​Picker(_:​did​Select:​). When users select

        other properties, it implements their default action.

    */

    override func handleContactsWithPhoneNumbers() {

        let picker = CNContactPickerViewController()

        picker.delegate = self

        picker.predicateForSelectionOfProperty = NSPredicate(format: "key == 'phoneNumbers'")

        navigationController?.present(picker, animated: true, completion: nil)

    }

}

/**

    Extends `ForSelectionOfPropertyViewController` to conform to the

    `CNContactPickerDelegate` protocol.

*/

extension ForSelectionOfPropertyViewController: CNContactPickerDelegate {

    /**

        Called when tapping the contact property associated a feature such as

        emailAddresses, postalAddresses, or phoneNumbers.

    */

    func contactPicker(_ picker: CNContactPickerViewController, didSelect contactProperty: CNContactProperty) {

        selectedContactProperty = contactProperty

    }

    /// Called when tapping "Cancel" in the contacts picker view.

    func contactPickerDidCancel(_ picker: CNContactPickerViewController) {

        print("\(AppConfiguration.Messages.dismissPicker)")

    }

}