Swiftgram/TelegramUI/PermissionController.swift

import Foundation
import Display
import AsyncDisplayKit
import SwiftSignalKit
import TelegramCore

final class PermissionController : ViewController {
    private var controllerNode: PermissionControllerNode {
        return self.displayNode as! PermissionControllerNode
    }
    
    private let account: Account
    private let strings: PresentationStrings
    private let theme: AuthorizationTheme
    
    private var animatedIn = false
    
    private var allow: (() -> Void)?
    
    init(account: Account) {
        self.account = account
        self.strings = account.telegramApplicationContext.currentPresentationData.with { $0 }.strings
        self.theme = defaultLightAuthorizationTheme
        
        super.init(navigationBarPresentationData: nil)
        
        self.supportedOrientations = ViewControllerSupportedOrientations(regularSize: .all, compactSize: .portrait)
        
        self.statusBar.statusBarStyle = self.theme.statusBarStyle
    }
    
    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func loadDisplayNode() {
        self.displayNode = PermissionControllerNode(theme: self.theme, strings: self.strings)
        self.displayNodeDidLoad()
        
        self.controllerNode.dismiss = { [weak self] in
            self?.presentingViewController?.dismiss(animated: false, completion: nil)
        }
        self.controllerNode.allow = { [weak self] in
            self?.allow?()
        }
        self.controllerNode.next = { [weak self] in
            self?.dismiss(completion: nil)
        }
        self.controllerNode.openPrivacyPolicy = { [weak self] in
            if let strongSelf = self {
                openExternalUrl(account: strongSelf.account, context: .generic, url: "https://telegram.org/privacy", forceExternal: true, presentationData: strongSelf.account.telegramApplicationContext.currentPresentationData.with { $0 }, applicationContext: strongSelf.account.telegramApplicationContext, navigationController: nil, dismissInput: {})
            }
        }
    }
    
    override public func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        if !self.animatedIn {
            self.animatedIn = true
            self.controllerNode.animateIn()
        }
    }
    
    override func dismiss(completion: (() -> Void)?) {
        self.controllerNode.animateOut(completion: completion)
    }
    
    func updateData(subject: DeviceAccessSubject, currentStatus: AccessType, allow: @escaping () -> Void) {
        self.allow = allow
        self.controllerNode.updateData(subject: .notifications, currentStatus: currentStatus)
    }
    
    override func containerLayoutUpdated(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition) {
        super.containerLayoutUpdated(layout, transition: transition)
        
        self.controllerNode.containerLayoutUpdated(layout, navigationBarHeight: self.navigationHeight, transition: transition)
    }
}