/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A base view controller to share a data model and a table view between subclas-

  ses. Allows its subclasses to display selected contacts and properties.

*/

import UIKit

class BaseViewController: UIViewController {

    // MARK: - Properties

    /**

        Contains a tableview and a label. The label describes the content of the

        tableview. The table view displays the selected contacts or properties.

    */

    @IBOutlet var stackView: UIStackView!

    @IBOutlet var tableView: UITableView!

    /// Data model used by all BaseViewController subclasses.

    var data = [Section]()

    // MARK: - View Life Cycle

    override func viewDidLoad() {

        super.viewDidLoad()

        hideStackView(true)

    }

    // MARK: - Update UI

    /**

        Shows the stack view and refreshes the table view when they are selected

        contacts or properties. Hides it otherwise.

    */

    func hideStackView(_ status: Bool) {

        if status {

            data.removeAll()

            tableView.reloadData()

            stackView.isHidden = true

        } else {

            if !data.isEmpty {

                stackView.isHidden = false

                tableView.reloadData()

            }

        }

    }

}

/**

    Extends `BaseViewController` to conform to the ` UITableViewDataSource` and

    `UITableViewDelegate` protocols.

*/

extension BaseViewController: UITableViewDataSource, UITableViewDelegate {

    // MARK: - UITableViewDataSource

    func numberOfSections(in tableView: UITableView) -> Int {

        return data.count

    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return data[section].section.count

    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        return tableView.dequeueReusableCell(withIdentifier: AppConfiguration.TableViewCellIdentifiers.cell, for: indexPath)

    }

}