241 lines
9.9 KiB
Swift
241 lines
9.9 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import AVKit
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import BlurHash
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import Combine
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import SDWebImage
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import UIKit
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import ViewModels
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final class AttachmentView: UIView {
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let playerView = PlayerView()
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let imageView = SDAnimatedImageView()
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let removeButton = UIButton(type: .close)
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let uncaptionedLabel = CapsuleLabel()
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let selectionButton = UIButton()
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var playing: Bool = false {
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didSet {
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if playing {
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play()
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imageView.tag = 0
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playerView.tag = viewModel.tag
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} else {
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stop()
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imageView.tag = viewModel.tag
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playerView.tag = 0
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}
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}
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}
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private let viewModel: AttachmentViewModel
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private let parentViewModel: AttachmentsRenderingViewModel
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private var playerCancellable: AnyCancellable?
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init(viewModel: AttachmentViewModel, parentViewModel: AttachmentsRenderingViewModel) {
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self.viewModel = viewModel
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self.parentViewModel = parentViewModel
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super.init(frame: .zero)
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initialSetup()
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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if let focus = viewModel.attachment.meta?.focus {
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let viewsAndMediaSizes: [(UIView, CGSize?)] = [
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(imageView, imageView.image?.size),
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(playerView, playerView.player?.currentItem?.presentationSize)]
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for (view, mediaSize) in viewsAndMediaSizes {
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guard let size = mediaSize else { continue }
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view.setContentsRect(focus: focus, mediaSize: size)
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}
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}
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}
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}
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extension AttachmentView {
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func play() {
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let player = PlayerCache.shared.player(url: viewModel.attachment.url.url)
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playerCancellable = NotificationCenter.default.publisher(
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for: .AVPlayerItemDidPlayToEndTime,
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object: player.currentItem)
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.sink { _ in
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player.currentItem?.seek(to: .zero) { success in
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guard success else { return }
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player.play()
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}
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}
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player.isMuted = true
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player.play()
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playerView.player = player
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playerView.isHidden = false
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}
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func stop() {
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if let item = playerView.player?.currentItem {
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let imageGenerator = AVAssetImageGenerator(asset: item.asset)
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imageGenerator.requestedTimeToleranceAfter = .zero
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imageGenerator.requestedTimeToleranceBefore = .zero
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if let image = try? imageGenerator.copyCGImage(at: item.currentTime(), actualTime: nil) {
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imageView.image = .init(cgImage: image)
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}
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}
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playerView.player = nil
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playerView.isHidden = true
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}
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func selectAttachment() {
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parentViewModel.attachmentSelected(viewModel: viewModel)
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}
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}
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private extension AttachmentView {
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// swiftlint:disable:next function_body_length
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func initialSetup() {
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addSubview(imageView)
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imageView.translatesAutoresizingMaskIntoConstraints = false
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imageView.contentMode = .scaleAspectFill
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imageView.clipsToBounds = true
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imageView.autoPlayAnimatedImage = false
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imageView.tag = viewModel.tag
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let blurEffect = UIBlurEffect(style: .systemUltraThinMaterial)
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let playView = UIVisualEffectView(effect: blurEffect)
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let playVibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
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let playImageView = UIImageView(
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image: UIImage(systemName: "play.circle",
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withConfiguration: UIImage.SymbolConfiguration(textStyle: .largeTitle)))
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playImageView.translatesAutoresizingMaskIntoConstraints = false
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playVibrancyView.translatesAutoresizingMaskIntoConstraints = false
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playVibrancyView.contentView.addSubview(playImageView)
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playView.contentView.addSubview(playVibrancyView)
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addSubview(playView)
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playView.translatesAutoresizingMaskIntoConstraints = false
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playView.clipsToBounds = true
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playView.layer.cornerRadius = .defaultCornerRadius
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playView.isHidden = viewModel.attachment.type == .image
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addSubview(playerView)
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playerView.translatesAutoresizingMaskIntoConstraints = false
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playerView.videoGravity = .resizeAspectFill
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playerView.isHidden = true
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addSubview(selectionButton)
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selectionButton.translatesAutoresizingMaskIntoConstraints = false
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selectionButton.setBackgroundImage(.highlightedButtonBackground, for: .highlighted)
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selectionButton.addAction(
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UIAction { [weak self] _ in self?.selectAttachment() },
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for: .touchUpInside)
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selectionButton.accessibilityLabel = NSLocalizedString("compose.attachment.edit", comment: "")
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if let description = viewModel.attachment.description, !description.isEmpty {
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selectionButton.accessibilityLabel?.appendWithSeparator(description)
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}
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addSubview(removeButton)
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removeButton.translatesAutoresizingMaskIntoConstraints = false
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removeButton.showsMenuAsPrimaryAction = true
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removeButton.accessibilityLabel = NSLocalizedString("compose.attachment.remove", comment: "")
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removeButton.menu = UIMenu(
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children: [
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UIAction(
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title: NSLocalizedString("remove", comment: ""),
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image: UIImage(systemName: "trash"),
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attributes: .destructive) { [weak self] _ in
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guard let self = self else { return }
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self.parentViewModel.removeAttachment(viewModel: self.viewModel)
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}])
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addSubview(uncaptionedLabel)
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uncaptionedLabel.translatesAutoresizingMaskIntoConstraints = false
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uncaptionedLabel.text = NSLocalizedString("compose.attachment.uncaptioned", comment: "")
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uncaptionedLabel.isHidden = !(parentViewModel.canRemoveAttachments
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&& (viewModel.attachment.description?.isEmpty ?? true))
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switch viewModel.attachment.type {
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case .image, .video, .gifv:
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let placeholderImage: UIImage?
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if let blurHash = viewModel.attachment.blurhash {
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placeholderImage = UIImage(blurHash: blurHash, size: .blurHashSize)
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} else {
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placeholderImage = nil
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}
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imageView.sd_setImage(
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with: viewModel.attachment.previewUrl?.url,
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placeholderImage: placeholderImage) { [weak self] _, _, _, _ in
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self?.layoutSubviews()
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}
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case .audio:
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playImageView.image = UIImage(systemName: "waveform.circle",
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withConfiguration: UIImage.SymbolConfiguration(textStyle: .largeTitle))
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backgroundColor = .secondarySystemBackground
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case .unknown:
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playImageView.image = UIImage(systemName: "link",
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withConfiguration: UIImage.SymbolConfiguration(textStyle: .largeTitle))
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backgroundColor = .secondarySystemBackground
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}
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NSLayoutConstraint.activate([
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imageView.leadingAnchor.constraint(equalTo: leadingAnchor),
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imageView.trailingAnchor.constraint(equalTo: trailingAnchor),
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imageView.topAnchor.constraint(equalTo: topAnchor),
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imageView.bottomAnchor.constraint(equalTo: bottomAnchor),
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playerView.leadingAnchor.constraint(equalTo: leadingAnchor),
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playerView.trailingAnchor.constraint(equalTo: trailingAnchor),
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playerView.topAnchor.constraint(equalTo: topAnchor),
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playerView.bottomAnchor.constraint(equalTo: bottomAnchor),
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playImageView.centerXAnchor.constraint(equalTo: playView.contentView.centerXAnchor),
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playImageView.centerYAnchor.constraint(equalTo: playView.contentView.centerYAnchor),
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playVibrancyView.leadingAnchor.constraint(equalTo: playView.leadingAnchor),
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playVibrancyView.topAnchor.constraint(equalTo: playView.topAnchor),
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playVibrancyView.trailingAnchor.constraint(equalTo: playView.trailingAnchor),
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playVibrancyView.bottomAnchor.constraint(equalTo: playView.bottomAnchor),
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playView.centerXAnchor.constraint(equalTo: centerXAnchor),
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playView.centerYAnchor.constraint(equalTo: centerYAnchor),
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playView.trailingAnchor.constraint(
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equalTo: playImageView.trailingAnchor, constant: .compactSpacing),
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playView.bottomAnchor.constraint(
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equalTo: playImageView.bottomAnchor, constant: .compactSpacing),
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playImageView.topAnchor.constraint(
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equalTo: playView.topAnchor, constant: .compactSpacing),
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playImageView.leadingAnchor.constraint(
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equalTo: playView.leadingAnchor, constant: .compactSpacing),
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selectionButton.leadingAnchor.constraint(equalTo: leadingAnchor),
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selectionButton.trailingAnchor.constraint(equalTo: trailingAnchor),
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selectionButton.topAnchor.constraint(equalTo: topAnchor),
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selectionButton.bottomAnchor.constraint(equalTo: bottomAnchor),
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removeButton.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor),
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removeButton.trailingAnchor.constraint(equalTo: layoutMarginsGuide.trailingAnchor),
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uncaptionedLabel.leadingAnchor.constraint(equalTo: layoutMarginsGuide.leadingAnchor),
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uncaptionedLabel.bottomAnchor.constraint(equalTo: layoutMarginsGuide.bottomAnchor)
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])
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var accessibilityLabel = viewModel.attachment.type.accessibilityName
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if let description = viewModel.attachment.description {
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accessibilityLabel.appendWithSeparator(description)
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}
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self.accessibilityLabel = accessibilityLabel
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}
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}
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