MyApp/ClipPreviewView.swift

1import SwiftUI2import AVKit3 4enum ClipValidation {5    static func validate(_ url: URL) async throws -> Double {6        guard FileManager.default.fileExists(atPath: url.path) else {7            throw PartyError.message("This clip is missing or expired. Its score is still saved.")8        }9        let asset = AVURLAsset(url: url)10        let playable = try await asset.load(.isPlayable)11        let duration = try await asset.load(.duration).seconds12        let video = try await asset.loadTracks(withMediaType: .video)13        let audio = try await asset.loadTracks(withMediaType: .audio)14        guard playable, duration.isFinite, duration > 0, !video.isEmpty, !audio.isEmpty else {15            throw PartyError.message("This file is not a playable video with audio. Try its original recording.")16        }17        return duration18    }19}20 21struct ClipPlayerView: View {22    let game: GameSessionStore23    let attempt: Attempt24    var preferExport = false25    @Environment(\.dismiss) private var dismiss26    @State private var player: AVPlayer?27    @State private var shareURL: URL?28    @State private var isSharing = false29    @State private var isLoading = true30    @State private var error = ""31    @State private var leased = false32    @State private var reload = UUID()33 34    var body: some View {35        NavigationStack {36            ScrollView {37                VStack(spacing: RetroTheme.spaceM) {38                    Group {39                        if let player {40                            VideoPlayer(player: player).frame(minHeight: 240)41                                .clipShape(RoundedRectangle(cornerRadius: RetroTheme.radius))42                                .overlay(RoundedRectangle(cornerRadius: RetroTheme.radius).stroke(RetroTheme.ink, lineWidth: RetroTheme.border))43                        } else if isLoading {44                            ZStack { RetroTheme.ink.opacity(0.06); ProgressView("Preparing clip…") }45                                .frame(minHeight: 240)46                                .clipShape(RoundedRectangle(cornerRadius: RetroTheme.radius))47                                .overlay(RoundedRectangle(cornerRadius: RetroTheme.radius).stroke(RetroTheme.ink, lineWidth: RetroTheme.border))48                        } else {49                            VStack(spacing: RetroTheme.spaceM) {50                                RetroEmptyState(title: "Clip unavailable", systemImage: "video.slash", message: error)51                                Button("Retry") { reload = UUID() }.buttonStyle(RetroButtonStyle(color: RetroTheme.surface))52                            }53                        }54                    }55                    RetroPanel {56                        VStack(alignment: .leading, spacing: RetroTheme.spaceS) {57                            if let actionTitle = attempt.snapshot.actionTitle, !actionTitle.isEmpty {58                                Text(attempt.snapshot.resolvedActionSummary)59                                    .font(.subheadline.bold())60                                    .foregroundStyle(RetroTheme.ink.opacity(0.75))61                            }62                            Text(attempt.snapshot.instruction).font(.headline)63                            if let cue = attempt.snapshot.visualCue {64                                Text("Visual S/Z · Cue: \(cue.letter)").font(RetroTheme.mono(.subheadline))65                            }66                            if let delivery = attempt.snapshot.delivery {67                                Text(attempt.snapshot.visualCue == nil ? "\(delivery.speed.title) · \(delivery.resolvedPlacement.title) placement" : delivery.speed.title)68                                Text("Voice: \(delivery.language)").font(.caption).foregroundStyle(RetroTheme.ink.opacity(0.6))69                            } else {70                                Text("Speech speed and placement: Unknown (legacy clip)").font(.caption).foregroundStyle(RetroTheme.ink.opacity(0.6))71                            }72                            RetroTag(title: attempt.voided ? "VOIDED" : (attempt.verdict?.rawValue.uppercased() ?? "PENDING"))73                        }74                    }75                    Button("Share Clip", systemImage: "square.and.arrow.up") {76                        guard shareURL != nil else { return }77                        player?.pause()78                        game.acquireMedia(attempt.id)79                        isSharing = true80                    }81                    .buttonStyle(RetroButtonStyle()).controlSize(.large)82                    .disabled(shareURL == nil || isLoading)83                    .frame(maxWidth: .infinity)84                    Text("Sharing does not change the result or advance the game.").font(.footnote).foregroundStyle(RetroTheme.ink.opacity(0.6))85                }86                .padding(.horizontal, RetroTheme.screenPaddingH)87                .padding(.vertical, RetroTheme.screenPaddingTop)88                .frame(maxWidth: RetroTheme.contentMaxWidth)89                .frame(maxWidth: .infinity)90            }91            .background { RetroGridBackground().ignoresSafeArea() }92            .retroTitle("Replay")93            .toolbar { Button("Done") { dismiss() } }94            .sheet(isPresented: $isSharing, onDismiss: { game.releaseMedia(attempt.id) }) {95                if let shareURL { ClipShareSheet(url: shareURL) }96            }97            .task(id: reload) {98                if !leased { game.acquireMedia(attempt.id); leased = true }99                isLoading = true; shareURL = nil; error = ""100                defer { isLoading = false }101                do {102                    guard let name = preferExport ? (attempt.exportFile ?? attempt.rawFile) : attempt.rawFile,103                          let originalURL = game.mediaURL(name) else { throw PartyError.message("No saved recording is available.") }104                    let url = attempt.snapshot.visualCue != nil ? try await game.visualPlaybackURL(attempt) : originalURL105                    _ = try await ClipValidation.validate(url)106                    try Task.checkCancellation()107                    shareURL = url108                    player = AVPlayer(url: url)109                    player?.play()110                } catch { if !Task.isCancelled { self.error = error.localizedDescription } }111            }112            .onDisappear {113                player?.pause()114                if leased { game.releaseMedia(attempt.id); leased = false }115            }116        }117        .retroAppearance()118    }119}120 121struct ClipShareSheet: UIViewControllerRepresentable {122    let url: URL123    func makeUIViewController(context: Context) -> UIActivityViewController {124        UIActivityViewController(activityItems: [url], applicationActivities: nil)125    }126    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {}127}128 129@MainActor130final class ClipThumbnailCache {131    static let shared = ClipThumbnailCache()132    private let images = NSCache<NSURL, UIImage>()133    private var tasks: [URL: Task<UIImage, Error>] = [:]134    private init() { images.countLimit = 60 }135    func image(for url: URL) async throws -> UIImage {136        if let image = images.object(forKey: url as NSURL) { return image }137        if let task = tasks[url] { return try await task.value }138        let task = Task {139            let generator = AVAssetImageGenerator(asset: AVURLAsset(url: url))140            generator.appliesPreferredTrackTransform = true141            generator.maximumSize = CGSize(width: 240, height: 240)142            let result = try await generator.image(at: .zero)143            return UIImage(cgImage: result.image)144        }145        tasks[url] = task146        defer { tasks[url] = nil }147        let image = try await task.value148        images.setObject(image, forKey: url as NSURL)149        return image150    }151    func remove(_ url: URL) { images.removeObject(forKey: url as NSURL); tasks[url]?.cancel(); tasks[url] = nil }152}153 154struct ClipThumbnail: View {155    let url: URL?156    @State private var image: UIImage?157    @State private var unavailable = false158    var body: some View {159        ZStack {160            RoundedRectangle(cornerRadius: RetroTheme.radius).fill(RetroTheme.ink.opacity(0.08))161            if let image { Image(uiImage: image).resizable().scaledToFit() }162            else { Image(systemName: unavailable ? "video.slash" : "video").foregroundStyle(RetroTheme.ink.opacity(0.4)) }163        }164        .frame(width: 96, height: 96).clipShape(.rect(cornerRadius: RetroTheme.radius))165        .overlay(RoundedRectangle(cornerRadius: RetroTheme.radius).stroke(RetroTheme.ink, lineWidth: RetroTheme.border))166        .accessibilityLabel(unavailable ? "Preview unavailable" : "Video thumbnail")167        .task(id: url) {168            guard let url else { unavailable = true; return }169            do { image = try await ClipThumbnailCache.shared.image(for: url) }170            catch { unavailable = true }171        }172    }173}