vlc-ios/Sources/MediaViewControllers/MediaViewController.swift

/*****************************************************************************
 * MediaViewController.swift
 * VLC for iOS
 *****************************************************************************
 * Copyright (c) 2018 VideoLAN. All rights reserved.
 * $Id$
 *
 * Authors: Carola Nitz <caro # videolan.org>
 *
 * Refer to the COPYING file of the official project for license.
 *****************************************************************************/

import UIKit

class VLCMediaViewController: VLCPagingViewController<VLCLabelCell> {
    var services: Services
    private var rendererButton: UIButton
    private var sortButton: UIBarButtonItem?
    private let fixedSpaceWidth: CGFloat = 21

    init(services: Services) {
        self.services = services
        rendererButton = services.rendererDiscovererManager.setupRendererButton()
        super.init(nibName: nil, bundle: nil)
    }

    override func viewDidLoad() {

        changeCurrentIndexProgressive = { (oldCell: VLCLabelCell?, newCell: VLCLabelCell?, progressPercentage: CGFloat, changeCurrentIndex: Bool, animated: Bool) in
            guard changeCurrentIndex == true else { return }
            oldCell?.iconLabel.textColor = PresentationTheme.current.colors.cellDetailTextColor
            newCell?.iconLabel.textColor = PresentationTheme.current.colors.orangeUI
        }
        setupNavigationBar()
        super.viewDidLoad()
    }

    private func setupNavigationBar() {
        if #available(iOS 11.0, *) {
            navigationController?.navigationBar.prefersLargeTitles = false
        }
        navigationController?.navigationBar.isTranslucent = false
        let fixedSpace: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
        fixedSpace.width = fixedSpaceWidth
        sortButton = UIBarButtonItem(title: NSLocalizedString("SORT", comment: ""), style: .plain, target: self, action: #selector(sort))
        navigationItem.leftBarButtonItem = sortButton
        navigationItem.rightBarButtonItems = [editButtonItem, fixedSpace, UIBarButtonItem(customView: rendererButton)]
    }

    @objc func sort() {
        // This should be in a subclass
        let sortOptionsAlertController = UIAlertController(title: NSLocalizedString("SORT_BY", comment: ""), message: nil, preferredStyle: .actionSheet)
        let sortByNameAction = UIAlertAction(title: SortOption.alphabetically.localizedDescription, style: .default) {
            [weak self] action in
            // call medialibrary
            if let index = self?.currentIndex {
                let currentViewController = self?.viewControllers[index] as? VLCMediaCategoryViewController
                currentViewController?.sortByFileName()
            }
        }
        let sortBySizeAction = UIAlertAction(title: SortOption.size.localizedDescription, style: .default) {
            [weak self] action in
            if let index = self?.currentIndex {
                let currentViewController = self?.viewControllers[index] as? VLCMediaCategoryViewController
                currentViewController?.sortBySize()
            }

        }
        let sortbyDateAction = UIAlertAction(title: SortOption.insertonDate.localizedDescription, style: .default) {
            [weak self] action in
            if let index = self?.currentIndex {
                let currentViewController = self?.viewControllers[index] as? VLCMediaCategoryViewController
                currentViewController?.sortByDate()
            }
        }
        let cancelAction = UIAlertAction(title: NSLocalizedString("CANCEL", comment: ""), style: .cancel, handler: nil)
        sortOptionsAlertController.addAction(sortByNameAction)
        sortOptionsAlertController.addAction(sortbyDateAction)
        sortOptionsAlertController.addAction(sortBySizeAction)
        sortOptionsAlertController.addAction(cancelAction)
        sortOptionsAlertController.view.tintColor = .vlcOrangeTint
        sortOptionsAlertController.popoverPresentationController?.sourceView = self.view
        present(sortOptionsAlertController, animated: true)
    }

    // MARK: - PagerTabStripDataSource

    override func viewControllers(for pagerTabStripController: PagerTabStripViewController) -> [UIViewController] {
        fatalError("this should only be used as subclass")
    }

    override func configure(cell: VLCLabelCell, for indicatorInfo: IndicatorInfo) {
        cell.iconLabel.text = indicatorInfo.title
    }

    override func updateIndicator(for viewController: PagerTabStripViewController, fromIndex: Int, toIndex: Int, withProgressPercentage progressPercentage: CGFloat, indexWasChanged: Bool) {
        super.updateIndicator(for: viewController, fromIndex: fromIndex, toIndex: toIndex, withProgressPercentage: progressPercentage, indexWasChanged: indexWasChanged)
    }

    override var preferredStatusBarStyle: UIStatusBarStyle {
        return PresentationTheme.current.colors.statusBarStyle
    }

    override func setEditing(_ editing: Bool, animated: Bool) {
        super.setEditing(editing, animated: animated)

        scrollingEnabled(!editing)
        navigationItem.leftBarButtonItem = editing ? nil : sortButton
        viewControllers[currentIndex].setEditing(editing, animated: animated)
    }
}