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apple/PhysarumApp/Sources/Capture/ExportedCapture.swift

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#if !os(tvOS)
import SwiftUI
import UniformTypeIdentifiers

/// UTType for a finished capture, derived from its file extension.
/// Live Photo exports the HEVC motion clip (the paired still goes to Photos via Save).
func exportType(for out: CaptureOutput) -> UTType {
    switch out {
    case .file(let url, _):
        switch url.pathExtension.lowercased() {
        case "png":  return .png
        case "heic": return .heic
        case "mov":  return .quickTimeMovie
        case "mp4":  return .mpeg4Movie
        default:     return .data
        }
    case .livePhoto:
        return .quickTimeMovie
    }
}

/// Export-only FileDocument that copies an already-rendered capture file to a
/// user-chosen location via `.fileExporter`.
struct ExportedCapture: FileDocument {
    static var readableContentTypes: [UTType] { [] }
    let url: URL
    let type: UTType

    init(url: URL, type: UTType) { self.url = url; self.type = type }
    init(configuration: ReadConfiguration) throws { throw CocoaError(.fileReadUnsupportedScheme) }

    func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
        try FileWrapper(url: url)
    }
}
#endif