ScanDisplayView.swift

import UIKit
import Shared
import Combine

final class ScanDisplayView: UIView {
    var actionPublisher: AnyPublisher<ScanDisplayShareView.Action, Never> {
        shareSheetView.actionPublisher.eraseToAnyPublisher()
    }

    private let copyLabel = UILabel()
    private let codeButton = ScanQRButton()
    private let copyImageView = UIImageView()
    private let copyContainerButton = UIControl()
    private var cancellables = Set<AnyCancellable>()
    private let shareSheetView = ScanDisplayShareView()

    init() {
        super.init(frame: .zero)
        backgroundColor = Asset.neutralDark.color

        copyImageView.image = Asset.scanCopy.image
        copyLabel.text = Localized.Scan.Display.copy
        copyLabel.textColor = Asset.neutralDisabled.color
        copyLabel.font = Fonts.Mulish.semiBold.font(size: 13.0)

        codeButton.publisher(for: .touchUpInside)
            .merge(with: copyContainerButton.publisher(for: .touchUpInside))
            .sink { [unowned self] in
                UIGraphicsBeginImageContext(codeButton.frame.size)
                codeButton.layer.render(in: UIGraphicsGetCurrentContext()!)
                let output = UIGraphicsGetImageFromCurrentImageContext()
                UIGraphicsEndImageContext()

                UIImageWriteToSavedPhotosAlbum(output!, nil, nil, nil)
                codeButton.blinkCopied()
            }.store(in: &cancellables)

        addSubview(codeButton)
        addSubview(copyContainerButton)
        copyContainerButton.addSubview(copyLabel)
        copyContainerButton.addSubview(copyImageView)

        addSubview(shareSheetView)

        codeButton.snp.makeConstraints {
            $0.centerX.equalTo(safeAreaLayoutGuide)
            $0.centerY.equalTo(safeAreaLayoutGuide).multipliedBy(0.6)
            $0.width.equalTo(safeAreaLayoutGuide).multipliedBy(0.6)
            $0.height.equalTo(codeButton.snp.width)
        }

        copyContainerButton.snp.makeConstraints {
            $0.top.equalTo(codeButton.snp.bottom).offset(33)
            $0.centerX.equalTo(codeButton)
        }

        copyImageView.snp.makeConstraints {
            $0.top.equalToSuperview()
            $0.left.equalToSuperview()
            $0.bottom.equalToSuperview()
        }

        copyLabel.snp.makeConstraints {
            $0.top.equalToSuperview()
            $0.left.equalTo(copyImageView.snp.right).offset(5)
            $0.right.equalToSuperview()
            $0.bottom.equalToSuperview()
        }

        shareSheetView.snp.makeConstraints {
            $0.left.equalToSuperview()
            $0.right.equalToSuperview()
            $0.bottom.equalToSuperview()
        }
    }

    required init?(coder: NSCoder) { nil }

    func setup(code image: CIImage) {
        codeButton.setup(code: image)
    }

    func setupAttributes(
        email: String?,
        phone: String?,
        emailSharing: Bool,
        phoneSharing: Bool
    ) {
        if let email = email {
            shareSheetView.setup(email: .init(content: email, isVisible: emailSharing))
        } else {
            shareSheetView.setup(email: nil)
        }

        if let phone = phone {
            shareSheetView.setup(phone: .init(content: phone, isVisible: phoneSharing))
        } else {
            shareSheetView.setup(phone: nil)
        }
    }
}