Swiftgram/submodules/TelegramUI/Components/AvatarEditorScreen/Sources/PremiumAlertController.swift

import Foundation
import UIKit
import SwiftSignalKit
import AsyncDisplayKit
import Display
import ComponentFlow
import Postbox
import TelegramCore
import TelegramPresentationData
import TelegramUIPreferences
import AccountContext
import AppBundle
import PremiumStarComponent

private final class PremiumAlertContentNode: AlertContentNode {
    private let strings: PresentationStrings
    private let presentationTheme: PresentationTheme
    private let title: String?
    private let text: String
    
    private let titleNode: ASTextNode
    private let textNode: ASTextNode
    private let icon = ComponentView<Empty>()
    
    private let actionNodesSeparator: ASDisplayNode
    private let actionNodes: [TextAlertContentActionNode]
    private let actionVerticalSeparators: [ASDisplayNode]
    
    private var validLayout: CGSize?
    
    override var dismissOnOutsideTap: Bool {
        return self.isUserInteractionEnabled
    }
    
    init(
        theme: AlertControllerTheme,
        presentationTheme: PresentationTheme,
        strings: PresentationStrings,
        title: String?,
        text: String,
        actions: [TextAlertAction]
    ) {
        self.strings = strings
        self.presentationTheme = presentationTheme
        self.title = title
        self.text = text
        
        self.titleNode = ASTextNode()
        self.titleNode.maximumNumberOfLines = 2
        
        self.textNode = ASTextNode()
        self.textNode.maximumNumberOfLines = 0
        self.textNode.lineSpacing = 0.1
        
        self.actionNodesSeparator = ASDisplayNode()
        self.actionNodesSeparator.isLayerBacked = true
        
        self.actionNodes = actions.map { action -> TextAlertContentActionNode in
            return TextAlertContentActionNode(theme: theme, action: action)
        }
        
        var actionVerticalSeparators: [ASDisplayNode] = []
        if actions.count > 1 {
            for _ in 0 ..< actions.count - 1 {
                let separatorNode = ASDisplayNode()
                separatorNode.isLayerBacked = true
                actionVerticalSeparators.append(separatorNode)
            }
        }
        self.actionVerticalSeparators = actionVerticalSeparators
        
        super.init()
        
        self.addSubnode(self.titleNode)
        self.addSubnode(self.textNode)
        
        self.addSubnode(self.actionNodesSeparator)
        
        for actionNode in self.actionNodes {
            self.addSubnode(actionNode)
        }
        
        for separatorNode in self.actionVerticalSeparators {
            self.addSubnode(separatorNode)
        }
        
        self.updateTheme(theme)
    }
    
    override func updateTheme(_ theme: AlertControllerTheme) {
        self.titleNode.attributedText = NSAttributedString(string: self.title ?? self.strings.PremiumNeeded_Title, font: Font.bold(17.0), textColor: theme.primaryColor, paragraphAlignment: .center)
        self.textNode.attributedText = NSAttributedString(string: self.text, font: Font.regular(13.0), textColor: theme.primaryColor, paragraphAlignment: .center)
        
        self.actionNodesSeparator.backgroundColor = theme.separatorColor
        for actionNode in self.actionNodes {
            actionNode.updateTheme(theme)
        }
        for separatorNode in self.actionVerticalSeparators {
            separatorNode.backgroundColor = theme.separatorColor
        }
        
        if let size = self.validLayout {
            _ = self.updateLayout(size: size, transition: .immediate)
        }
    }
    
    override func updateLayout(size: CGSize, transition: ContainedViewLayoutTransition) -> CGSize {
        var size = size
        size.width = min(size.width , 270.0)
        
        self.validLayout = size
        
        var origin: CGPoint = CGPoint(x: 0.0, y: 20.0)
        
        let starHeight: CGFloat = 105.0
        let starSize = self.icon.update(
            transition: .immediate,
            component: AnyComponent(
                PremiumStarComponent(
                    theme: self.presentationTheme,
                    isIntro: false,
                    isVisible: true,
                    hasIdleAnimations: true,
                    colors: [
                        UIColor(rgb: 0x6a94ff),
                        UIColor(rgb: 0x9472fd),
                        UIColor(rgb: 0xe26bd3)
                    ]
                )
            ),
            environment: {},
            containerSize: CGSize(width: size.width, height: 200.0)
        )
        if let view = self.icon.view {
            if view.superview == nil {
                self.view.addSubview(view)
            }
            view.frame = CGRect(origin: CGPoint(x: 0.0, y: -36.0), size: starSize)
            origin.y += starHeight
        }
        
        let titleSize = self.titleNode.measure(size)
        transition.updateFrame(node: self.titleNode, frame: CGRect(origin: CGPoint(x: floorToScreenPixels((size.width - titleSize.width) / 2.0), y: origin.y), size: titleSize))
        origin.y += titleSize.height + 5.0
        
        let textSize = self.textNode.measure(CGSize(width: size.width - 32.0, height: size.height))
        transition.updateFrame(node: self.textNode, frame: CGRect(origin: CGPoint(x: floorToScreenPixels((size.width - textSize.width) / 2.0), y: origin.y), size: textSize))
        
        let actionButtonHeight: CGFloat = 44.0
        var minActionsWidth: CGFloat = 0.0
        let maxActionWidth: CGFloat = floor(size.width / CGFloat(self.actionNodes.count))
        let actionTitleInsets: CGFloat = 8.0
        
        var effectiveActionLayout = TextAlertContentActionLayout.horizontal
        for actionNode in self.actionNodes {
            let actionTitleSize = actionNode.titleNode.updateLayout(CGSize(width: maxActionWidth, height: actionButtonHeight))
            if case .horizontal = effectiveActionLayout, actionTitleSize.height > actionButtonHeight * 0.6667 {
                effectiveActionLayout = .vertical
            }
            switch effectiveActionLayout {
                case .horizontal:
                    minActionsWidth += actionTitleSize.width + actionTitleInsets
                case .vertical:
                    minActionsWidth = max(minActionsWidth, actionTitleSize.width + actionTitleInsets)
            }
        }
        
        let insets = UIEdgeInsets(top: 18.0, left: 18.0, bottom: 18.0, right: 18.0)
        
        var contentWidth = max(titleSize.width, minActionsWidth)
        contentWidth = max(contentWidth, 234.0)
        
        var actionsHeight: CGFloat = 0.0
        switch effectiveActionLayout {
            case .horizontal:
                actionsHeight = actionButtonHeight
            case .vertical:
                actionsHeight = actionButtonHeight * CGFloat(self.actionNodes.count)
        }
        
        let resultWidth = contentWidth + insets.left + insets.right
        let resultSize = CGSize(width: resultWidth, height: titleSize.height + starHeight + textSize.height + actionsHeight + 7.0 + insets.top + insets.bottom)
        
        transition.updateFrame(node: self.actionNodesSeparator, frame: CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight - UIScreenPixel), size: CGSize(width: resultSize.width, height: UIScreenPixel)))
        
        var actionOffset: CGFloat = 0.0
        let actionWidth: CGFloat = floor(resultSize.width / CGFloat(self.actionNodes.count))
        var separatorIndex = -1
        var nodeIndex = 0
        for actionNode in self.actionNodes {
            if separatorIndex >= 0 {
                let separatorNode = self.actionVerticalSeparators[separatorIndex]
                switch effectiveActionLayout {
                    case .horizontal:
                        transition.updateFrame(node: separatorNode, frame: CGRect(origin: CGPoint(x: actionOffset - UIScreenPixel, y: resultSize.height - actionsHeight), size: CGSize(width: UIScreenPixel, height: actionsHeight - UIScreenPixel)))
                    case .vertical:
                        transition.updateFrame(node: separatorNode, frame: CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight + actionOffset - UIScreenPixel), size: CGSize(width: resultSize.width, height: UIScreenPixel)))
                }
            }
            separatorIndex += 1
            
            let currentActionWidth: CGFloat
            switch effectiveActionLayout {
                case .horizontal:
                    if nodeIndex == self.actionNodes.count - 1 {
                        currentActionWidth = resultSize.width - actionOffset
                    } else {
                        currentActionWidth = actionWidth
                    }
                case .vertical:
                    currentActionWidth = resultSize.width
            }
            
            let actionNodeFrame: CGRect
            switch effectiveActionLayout {
                case .horizontal:
                    actionNodeFrame = CGRect(origin: CGPoint(x: actionOffset, y: resultSize.height - actionsHeight), size: CGSize(width: currentActionWidth, height: actionButtonHeight))
                    actionOffset += currentActionWidth
                case .vertical:
                    actionNodeFrame = CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight + actionOffset), size: CGSize(width: currentActionWidth, height: actionButtonHeight))
                    actionOffset += actionButtonHeight
            }
            
            transition.updateFrame(node: actionNode, frame: actionNodeFrame)
            
            nodeIndex += 1
        }
        
        return resultSize
    }
}

func premiumAlertController(context: AccountContext, parentController: ViewController, title: String? = nil, text: String) -> AlertController {
    let presentationData = context.sharedContext.currentPresentationData.with { $0 }
    let strings = presentationData.strings
    
    var dismissImpl: ((Bool) -> Void)?
    var proceedImpl: (() -> Void)?
    var contentNode: PremiumAlertContentNode?
    let actions: [TextAlertAction] = [TextAlertAction(type: .genericAction, title: presentationData.strings.Common_Cancel, action: {
        dismissImpl?(true)
    }), TextAlertAction(type: .defaultAction, title: presentationData.strings.PremiumNeeded_Subscribe, action: {
        proceedImpl?()
        
        dismissImpl?(true)
    })]
        
    contentNode = PremiumAlertContentNode(
        theme: AlertControllerTheme(presentationData: presentationData),
        presentationTheme: presentationData.theme,
        strings: strings,
        title: title,
        text: text,
        actions: actions
    )
    
    let controller = AlertController(theme: AlertControllerTheme(presentationData: presentationData), contentNode: contentNode!)
    dismissImpl = { [weak controller] animated in
        if animated {
            controller?.dismissAnimated()
        } else {
            controller?.dismiss()
        }
    }
    
    proceedImpl = { [weak parentController] in
        let controller = context.sharedContext.makePremiumIntroController(context: context, source: .nameColor, forceDark: false, dismissed: nil)
        parentController?.push(controller)
    }
    
    return controller
}