/*

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

See LICENSE.txt for this sample’s licensing information

Abstract:

A view controller that shows a photo and its metadata.

*/

import UIKit

class PhotoViewController: UIViewController {

    // MARK: Properties

    @IBOutlet fileprivate var imageView: UIImageView?

    @IBOutlet fileprivate var overlayView: OverlayView?

    @IBOutlet fileprivate var ratingControl: RatingControl?

    var photo: Photo?

    // MARK: View Controller

    override func viewDidLoad() {

        super.viewDidLoad()

        updatePhoto()

    }

    // MARK: IBActions

    /*

        Action for a change in value from the `RatingControl` (the user choose a

        different rating for the photo).

    */

    @IBAction func changeRating(_ sender: RatingControl) {

        photo?.rating = sender.rating

    }

    // MARK: Convenience

    // Updates the image view and meta data views with the data from the current photo.

    func updatePhoto() {

        imageView?.image = photo?.image

        overlayView?.text = photo?.comment

        ratingControl?.rating = photo?.rating ?? RatingControl.minimumRating

    }

    // This method is originally declared in the PhotoContents extension on UIViewController.

    override func containedPhoto() -> Photo? {

        return photo

    }

}