source-code

source-code/ALTs/AltStore/App Detail/AppViewController.swift

@@ -0,0 +1,562 @@
+//
+//  AppViewController.swift
+//  AltStore
+//
+//  Created by Riley Testut on 7/22/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import Roxas
+
+import Nuke
+
+class AppViewController: UIViewController
+{
+    var app: StoreApp!
+    
+    private var contentViewController: AppContentViewController!
+    private var contentViewControllerShadowView: UIView!
+    
+    private var blurAnimator: UIViewPropertyAnimator?
+    private var navigationBarAnimator: UIViewPropertyAnimator?
+    
+    private var contentSizeObservation: NSKeyValueObservation?
+    
+    @IBOutlet private var scrollView: UIScrollView!
+    @IBOutlet private var contentView: UIView!
+    
+    @IBOutlet private var bannerView: AppBannerView!
+    
+    @IBOutlet private var backButton: UIButton!
+    @IBOutlet private var backButtonContainerView: UIVisualEffectView!
+    
+    @IBOutlet private var backgroundAppIconImageView: UIImageView!
+    @IBOutlet private var backgroundBlurView: UIVisualEffectView!
+    
+    @IBOutlet private var navigationBarTitleView: UIView!
+    @IBOutlet private var navigationBarDownloadButton: PillButton!
+    @IBOutlet private var navigationBarAppIconImageView: UIImageView!
+    @IBOutlet private var navigationBarAppNameLabel: UILabel!
+    
+    private var _shouldResetLayout = false
+    private var _backgroundBlurEffect: UIBlurEffect?
+    private var _backgroundBlurTintColor: UIColor?
+    
+    private var _preferredStatusBarStyle: UIStatusBarStyle = .default
+    
+    override var preferredStatusBarStyle: UIStatusBarStyle {
+        return _preferredStatusBarStyle
+    }
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+                        
+        self.navigationBarTitleView.sizeToFit()
+        self.navigationItem.titleView = self.navigationBarTitleView
+        
+        self.contentViewControllerShadowView = UIView()
+        self.contentViewControllerShadowView.backgroundColor = .white
+        self.contentViewControllerShadowView.layer.cornerRadius = 38
+        self.contentViewControllerShadowView.layer.shadowColor = UIColor.black.cgColor
+        self.contentViewControllerShadowView.layer.shadowOffset = CGSize(width: 0, height: -1)
+        self.contentViewControllerShadowView.layer.shadowRadius = 10
+        self.contentViewControllerShadowView.layer.shadowOpacity = 0.3
+        self.contentViewController.view.superview?.insertSubview(self.contentViewControllerShadowView, at: 0)
+        
+        self.contentView.addGestureRecognizer(self.scrollView.panGestureRecognizer)
+        
+        self.contentViewController.view.layer.cornerRadius = 38
+        self.contentViewController.view.layer.masksToBounds = true
+        
+        self.contentViewController.tableView.panGestureRecognizer.require(toFail: self.scrollView.panGestureRecognizer)
+        self.contentViewController.tableView.showsVerticalScrollIndicator = false
+        
+        // Bring to front so the scroll indicators are visible.
+        self.view.bringSubviewToFront(self.scrollView)
+        self.scrollView.isUserInteractionEnabled = false
+        
+        self.bannerView.frame = CGRect(x: 0, y: 0, width: 300, height: 93)
+        self.bannerView.backgroundEffectView.effect = UIBlurEffect(style: .regular)
+        self.bannerView.backgroundEffectView.backgroundColor = .clear
+        self.bannerView.titleLabel.text = self.app.name
+        self.bannerView.subtitleLabel.text = self.app.developerName
+        self.bannerView.iconImageView.image = nil
+        self.bannerView.iconImageView.tintColor = self.app.tintColor
+        self.bannerView.button.tintColor = self.app.tintColor
+        self.bannerView.betaBadgeView.isHidden = !self.app.isBeta
+        self.bannerView.tintColor = self.app.tintColor
+        
+        self.bannerView.button.addTarget(self, action: #selector(AppViewController.performAppAction(_:)), for: .primaryActionTriggered)
+        
+        self.backButtonContainerView.tintColor = self.app.tintColor
+        
+        self.navigationController?.navigationBar.tintColor = self.app.tintColor
+        self.navigationBarDownloadButton.tintColor = self.app.tintColor
+        self.navigationBarAppNameLabel.text = self.app.name
+        self.navigationBarAppIconImageView.tintColor = self.app.tintColor
+        
+        self.contentSizeObservation = self.contentViewController.tableView.observe(\.contentSize) { [weak self] (tableView, change) in
+            self?.view.setNeedsLayout()
+            self?.view.layoutIfNeeded()
+        }
+        
+        self.update()
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(AppViewController.didChangeApp(_:)), name: .NSManagedObjectContextObjectsDidChange, object: DatabaseManager.shared.viewContext)
+        NotificationCenter.default.addObserver(self, selector: #selector(AppViewController.willEnterForeground(_:)), name: UIApplication.willEnterForegroundNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(AppViewController.didBecomeActive(_:)), name: UIApplication.didBecomeActiveNotification, object: nil)
+        
+        self._backgroundBlurEffect = self.backgroundBlurView.effect as? UIBlurEffect
+        self._backgroundBlurTintColor = self.backgroundBlurView.contentView.backgroundColor
+        
+        // Load Images
+        for imageView in [self.bannerView.iconImageView!, self.backgroundAppIconImageView!, self.navigationBarAppIconImageView!]
+        {
+            imageView.isIndicatingActivity = true
+            
+            Nuke.loadImage(with: self.app.iconURL, options: .shared, into: imageView, progress: nil) { [weak imageView] (response, error) in
+                if response?.image != nil
+                {
+                    imageView?.isIndicatingActivity = false
+                }
+            }
+        }
+    }
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+
+        self.prepareBlur()
+        
+        // Update blur immediately.
+        self.view.setNeedsLayout()
+        self.view.layoutIfNeeded()
+
+        self.transitionCoordinator?.animate(alongsideTransition: { (context) in
+            self.hideNavigationBar()
+        }, completion: nil)
+    }
+    
+    override func viewDidAppear(_ animated: Bool)
+    {
+        super.viewDidAppear(animated)
+        
+        self._shouldResetLayout = true
+        self.view.setNeedsLayout()
+        self.view.layoutIfNeeded()
+    }
+    
+    override func viewWillDisappear(_ animated: Bool)
+    {
+        super.viewWillDisappear(animated)
+
+        // Guard against "dismissing" when presenting via 3D Touch pop.
+        guard self.navigationController != nil else { return }
+
+        // Store reference since self.navigationController will be nil after disappearing.
+        let navigationController = self.navigationController
+        navigationController?.navigationBar.barStyle = .default // Don't animate, or else status bar might appear messed-up.
+
+        self.transitionCoordinator?.animate(alongsideTransition: { (context) in
+            self.showNavigationBar(for: navigationController)
+        }, completion: { (context) in
+            if !context.isCancelled
+            {
+                self.showNavigationBar(for: navigationController)
+            }
+        })
+    }
+    
+    override func viewDidDisappear(_ animated: Bool)
+    {
+        super.viewDidDisappear(animated)
+        
+        if self.navigationController == nil
+        {
+            self.resetNavigationBarAnimation()
+        }
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?)
+    {
+        guard segue.identifier == "embedAppContentViewController" else { return }
+        
+        self.contentViewController = segue.destination as? AppContentViewController
+        self.contentViewController.app = self.app
+    }
+    
+    override func viewDidLayoutSubviews()
+    {
+        super.viewDidLayoutSubviews()
+        
+        if self._shouldResetLayout
+        {
+            // Various events can cause UI to mess up, so reset affected components now.
+            
+            if self.navigationController?.topViewController == self
+            {
+                self.hideNavigationBar()
+            }
+            
+            self.prepareBlur()
+            
+            // Reset navigation bar animation, and create a new one later in this method if necessary.
+            self.resetNavigationBarAnimation()
+                        
+            self._shouldResetLayout = false
+        }
+        
+        let statusBarHeight = UIApplication.shared.statusBarFrame.height
+        let cornerRadius = self.contentViewControllerShadowView.layer.cornerRadius
+        
+        let inset = 12 as CGFloat
+        let padding = 20 as CGFloat
+        
+        let backButtonSize = self.backButton.sizeThatFits(CGSize(width: 1000, height: 1000))
+        var backButtonFrame = CGRect(x: inset, y: statusBarHeight,
+                                     width: backButtonSize.width + 20, height: backButtonSize.height + 20)
+        
+        var headerFrame = CGRect(x: inset, y: 0, width: self.view.bounds.width - inset * 2, height: self.bannerView.bounds.height)
+        var contentFrame = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height)
+        var backgroundIconFrame = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.width)
+        
+        let minimumHeaderY = backButtonFrame.maxY + 8
+        
+        let minimumContentY = minimumHeaderY + headerFrame.height + padding
+        let maximumContentY = self.view.bounds.width * 0.667
+        
+        // A full blur is too much, so we reduce the visible blur by 0.3, resulting in 70% blur.
+        let minimumBlurFraction = 0.3 as CGFloat
+        
+        contentFrame.origin.y = maximumContentY - self.scrollView.contentOffset.y
+        headerFrame.origin.y = contentFrame.origin.y - padding - headerFrame.height
+        
+        // Stretch the app icon image to fill additional vertical space if necessary.
+        let height = max(contentFrame.origin.y + cornerRadius * 2, backgroundIconFrame.height)
+        backgroundIconFrame.size.height = height
+        
+        let blurThreshold = 0 as CGFloat
+        if self.scrollView.contentOffset.y < blurThreshold
+        {
+            // Determine how much to lessen blur by.
+            
+            let range = 75 as CGFloat
+            let difference = -self.scrollView.contentOffset.y
+            
+            let fraction = min(difference, range) / range
+            
+            let fractionComplete = (fraction * (1.0 - minimumBlurFraction)) + minimumBlurFraction
+            self.blurAnimator?.fractionComplete = fractionComplete
+        }
+        else
+        {
+            // Set blur to default.
+            
+            self.blurAnimator?.fractionComplete = minimumBlurFraction
+        }
+        
+        // Animate navigation bar.
+        let showNavigationBarThreshold = (maximumContentY - minimumContentY) + backButtonFrame.origin.y
+        if self.scrollView.contentOffset.y > showNavigationBarThreshold
+        {
+            if self.navigationBarAnimator == nil
+            {
+                self.prepareNavigationBarAnimation()
+            }
+            
+            let difference = self.scrollView.contentOffset.y - showNavigationBarThreshold
+            let range = (headerFrame.height + padding) - (self.navigationController?.navigationBar.bounds.height ?? self.view.safeAreaInsets.top)
+            
+            let fractionComplete = min(difference, range) / range
+            self.navigationBarAnimator?.fractionComplete = fractionComplete
+        }
+        else
+        {
+            self.resetNavigationBarAnimation()
+        }
+        
+        let beginMovingBackButtonThreshold = (maximumContentY - minimumContentY)
+        if self.scrollView.contentOffset.y > beginMovingBackButtonThreshold
+        {
+            let difference = self.scrollView.contentOffset.y - beginMovingBackButtonThreshold
+            backButtonFrame.origin.y -= difference
+        }
+        
+        let pinContentToTopThreshold = maximumContentY
+        if self.scrollView.contentOffset.y > pinContentToTopThreshold
+        {
+            contentFrame.origin.y = 0
+            backgroundIconFrame.origin.y = 0
+            
+            let difference = self.scrollView.contentOffset.y - pinContentToTopThreshold
+            self.contentViewController.tableView.contentOffset.y = difference
+        }
+        else
+        {
+            // Keep content table view's content offset at the top.
+            self.contentViewController.tableView.contentOffset.y = 0
+        }
+
+        // Keep background app icon centered in gap between top of content and top of screen.
+        backgroundIconFrame.origin.y = (contentFrame.origin.y / 2) - backgroundIconFrame.height / 2
+        
+        // Set frames.
+        self.contentViewController.view.superview?.frame = contentFrame
+        self.bannerView.frame = headerFrame
+        self.backgroundAppIconImageView.frame = backgroundIconFrame
+        self.backgroundBlurView.frame = backgroundIconFrame
+        self.backButtonContainerView.frame = backButtonFrame
+        
+        self.contentViewControllerShadowView.frame = self.contentViewController.view.frame
+        
+        self.backButtonContainerView.layer.cornerRadius = self.backButtonContainerView.bounds.midY
+        
+        self.scrollView.scrollIndicatorInsets.top = statusBarHeight
+        
+        // Adjust content offset + size.
+        let contentOffset = self.scrollView.contentOffset
+        
+        var contentSize = self.contentViewController.tableView.contentSize
+        contentSize.height += maximumContentY
+        
+        self.scrollView.contentSize = contentSize
+        self.scrollView.contentOffset = contentOffset
+        
+        self.bannerView.backgroundEffectView.backgroundColor = .clear
+    }
+    
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?)
+    {
+        super.traitCollectionDidChange(previousTraitCollection)
+        self._shouldResetLayout = true
+    }
+    
+    deinit
+    {
+        self.blurAnimator?.stopAnimation(true)
+        self.navigationBarAnimator?.stopAnimation(true)
+    }
+}
+
+extension AppViewController
+{
+    class func makeAppViewController(app: StoreApp) -> AppViewController
+    {
+        let storyboard = UIStoryboard(name: "Main", bundle: nil)
+        
+        let appViewController = storyboard.instantiateViewController(withIdentifier: "appViewController") as! AppViewController
+        appViewController.app = app
+        return appViewController
+    }
+}
+
+private extension AppViewController
+{
+    func update()
+    {
+        for button in [self.bannerView.button!, self.navigationBarDownloadButton!]
+        {
+            button.tintColor = self.app.tintColor
+            button.isIndicatingActivity = false
+            
+            if self.app.installedApp == nil
+            {
+                button.setTitle(NSLocalizedString("FREE", comment: ""), for: .normal)
+            }
+            else
+            {
+                button.setTitle(NSLocalizedString("OPEN", comment: ""), for: .normal)
+            }
+            
+            let progress = AppManager.shared.installationProgress(for: self.app)
+            button.progress = progress
+        }
+        
+        if Date() < self.app.versionDate
+        {
+            self.bannerView.button.countdownDate = self.app.versionDate
+            self.navigationBarDownloadButton.countdownDate = self.app.versionDate
+        }
+        else
+        {
+            self.bannerView.button.countdownDate = nil
+            self.navigationBarDownloadButton.countdownDate = nil
+        }
+        
+        let barButtonItem = self.navigationItem.rightBarButtonItem
+        self.navigationItem.rightBarButtonItem = nil
+        self.navigationItem.rightBarButtonItem = barButtonItem
+    }
+    
+    func showNavigationBar(for navigationController: UINavigationController? = nil)
+    {
+        let navigationController = navigationController ?? self.navigationController
+        navigationController?.navigationBar.alpha = 1.0
+        navigationController?.navigationBar.tintColor = .altPrimary
+        navigationController?.navigationBar.setNeedsLayout()
+        
+        if self.traitCollection.userInterfaceStyle == .dark
+        {
+            self._preferredStatusBarStyle = .lightContent
+        }
+        else
+        {
+            self._preferredStatusBarStyle = .default
+        }
+        
+        navigationController?.setNeedsStatusBarAppearanceUpdate()
+    }
+    
+    func hideNavigationBar(for navigationController: UINavigationController? = nil)
+    {
+        let navigationController = navigationController ?? self.navigationController
+        navigationController?.navigationBar.alpha = 0.0
+        
+        self._preferredStatusBarStyle = .lightContent
+        navigationController?.setNeedsStatusBarAppearanceUpdate()
+    }
+    
+    func prepareBlur()
+    {
+        if let animator = self.blurAnimator
+        {
+            animator.stopAnimation(true)
+        }
+        
+        self.backgroundBlurView.effect = self._backgroundBlurEffect
+        self.backgroundBlurView.contentView.backgroundColor = self._backgroundBlurTintColor
+        
+        self.blurAnimator = UIViewPropertyAnimator(duration: 1.0, curve: .linear) { [weak self] in
+            self?.backgroundBlurView.effect = nil
+            self?.backgroundBlurView.contentView.backgroundColor = .clear
+        }
+
+        self.blurAnimator?.startAnimation()
+        self.blurAnimator?.pauseAnimation()
+    }
+    
+    func prepareNavigationBarAnimation()
+    {
+        self.resetNavigationBarAnimation()
+        
+        self.navigationBarAnimator = UIViewPropertyAnimator(duration: 1.0, curve: .linear) { [weak self] in
+            self?.showNavigationBar()
+            self?.navigationController?.navigationBar.tintColor = self?.app.tintColor
+            self?.navigationController?.navigationBar.barTintColor = nil
+            self?.contentViewController.view.layer.cornerRadius = 0
+        }
+        
+        self.navigationBarAnimator?.startAnimation()
+        self.navigationBarAnimator?.pauseAnimation()
+        
+        self.update()
+    }
+    
+    func resetNavigationBarAnimation()
+    {
+        self.navigationBarAnimator?.stopAnimation(true)
+        self.navigationBarAnimator = nil
+        
+        self.hideNavigationBar()
+        
+        self.contentViewController.view.layer.cornerRadius = self.contentViewControllerShadowView.layer.cornerRadius
+    }
+}
+
+extension AppViewController
+{
+    @IBAction func popViewController(_ sender: UIButton)
+    {
+        self.navigationController?.popViewController(animated: true)
+    }
+    
+    @IBAction func performAppAction(_ sender: PillButton)
+    {
+        if let installedApp = self.app.installedApp
+        {
+            self.open(installedApp)
+        }
+        else
+        {
+            self.downloadApp()
+        }
+    }
+    
+    func downloadApp()
+    {
+        guard self.app.installedApp == nil else { return }
+        
+        let progress = AppManager.shared.install(self.app, presentingViewController: self) { (result) in
+            do
+            {
+                _ = try result.get()
+            }
+            catch OperationError.cancelled
+            {
+                // Ignore
+            }
+            catch
+            {
+                DispatchQueue.main.async {
+                    let toastView = ToastView(error: error)
+                    toastView.show(in: self)
+                }
+            }
+            
+            DispatchQueue.main.async {
+                self.bannerView.button.progress = nil
+                self.navigationBarDownloadButton.progress = nil
+                self.update()
+            }
+        }
+        
+        self.bannerView.button.progress = progress
+        self.navigationBarDownloadButton.progress = progress
+    }
+    
+    func open(_ installedApp: InstalledApp)
+    {
+        UIApplication.shared.open(installedApp.openAppURL)
+    }
+}
+
+private extension AppViewController
+{
+    @objc func didChangeApp(_ notification: Notification)
+    {
+        // Async so that AppManager.installationProgress(for:) is nil when we update.
+        DispatchQueue.main.async {
+            self.update()
+        }
+    }
+    
+    @objc func willEnterForeground(_ notification: Notification)
+    {
+        guard let navigationController = self.navigationController, navigationController.topViewController == self else { return }
+        
+        self._shouldResetLayout = true
+        self.view.setNeedsLayout()
+    }
+    
+    @objc func didBecomeActive(_ notification: Notification)
+    {
+        guard let navigationController = self.navigationController, navigationController.topViewController == self else { return }
+        
+        // Fixes Navigation Bar appearing after app becomes inactive -> active again.
+        self._shouldResetLayout = true
+        self.view.setNeedsLayout()
+    }
+}
+
+extension AppViewController: UIScrollViewDelegate
+{
+    func scrollViewDidScroll(_ scrollView: UIScrollView)
+    {
+        self.view.setNeedsLayout()
+        self.view.layoutIfNeeded()
+    }
+}