/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A BaseViewController subclass that implements the Single Contact tab. Creates

  and presents a contact picker view controller when tapping "Show Picker" in the

  UI. Uses CNContactPickerDelegate's contact​Picker(_ picker: CNContactPickerViewController,

  didSelect contact: CNContact​) to allow users to select and return a single contact.

*/

import UIKit

import ContactsUI

class SelectSingleContact: BaseViewController {

    // MARK: - Display Picker

    /**

        Presents a contacts picker view when users tap "Show Picker" in the

        Single Contact tab. Select a contact in the picker to continue.

    */

    @IBAction func showPicker(_ sender: UIButton) {

        hideStackView(true)

        let picker = CNContactPickerViewController()

        picker.delegate = self

        present(picker, animated: true, completion: nil)

    }

    // MARK: - UITableViewDelegate

    func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

        let  section = data[indexPath.section].section

        let item = section[indexPath.row]

        cell.textLabel?.text = item.value

    }

}

/**

    Extends `SelectSingleContact` to conform to the `CNContactPickerDelegate`

    protocol.

*/

extension SelectSingleContact: CNContactPickerDelegate {

    /**

        Called when users select a single contact. Calls hideStackView(_:) to

        update the table view with the selection.

    */

    func contactPicker(_ picker: CNContactPickerViewController, didSelect contact: CNContact) {

        let item = [LabelValue(value: contact.formattedName)]

        data = [Section(section: item)]

        // Show and update the table view with the above contact.

        hideStackView(false)

    }

}