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apple/PhysarumApp/Sources/Capture/CaptureCleanup.swift

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import Foundation

/// Capture outputs are written to the temporary directory as `physarum-*` and
/// only egress via Share/Save/Export. Nothing deleted them. Sweep orphaned ones
/// at launch (prior-session leftovers, aborted sheets).
enum CaptureCleanup {
    static let prefix = "physarum-"
    static let captureExtensions: Set<String> = ["png", "heic", "mov", "mp4"]

    static func staleCaptureFiles(in dir: URL, now: Date, olderThan: TimeInterval,
                                  fm: FileManager = .default) -> [URL] {
        guard let items = try? fm.contentsOfDirectory(
            at: dir, includingPropertiesForKeys: [.contentModificationDateKey]) else { return [] }
        return items.filter { url in
            guard url.lastPathComponent.hasPrefix(prefix),
                  captureExtensions.contains(url.pathExtension.lowercased()) else { return false }
            let mod = (try? url.resourceValues(forKeys: [.contentModificationDateKey])
                .contentModificationDate) ?? .distantPast
            return now.timeIntervalSince(mod) > olderThan
        }
    }

    static func sweep(now: Date = Date(), olderThan: TimeInterval = 3600,
                      dir: URL = FileManager.default.temporaryDirectory, fm: FileManager = .default) {
        for url in staleCaptureFiles(in: dir, now: now, olderThan: olderThan, fm: fm) {
            try? fm.removeItem(at: url)
        }
    }
}