tv-anarchy/Sources/TVAnarchyCore/Library/IndexedFoldersStore.swift

import Foundation

/// Tracks content folders (`downloadDir/name`) already ingested into the library.
/// Without this, torrents that finished before the app launched never get a direct
/// scan — the first poll deliberately skips completion notifications for the backlog.
public enum IndexedFoldersStore {
    private static let key = "tv-anarchy.indexed-content-folders"

    public static func load() -> Set<String> {
        Set(UserDefaults.standard.stringArray(forKey: key) ?? [])
    }

    public static func mark(_ folders: [String]) {
        guard !folders.isEmpty else { return }
        var known = load()
        let before = known.count
        folders.forEach { known.insert($0) }
        guard known.count > before else { return }
        UserDefaults.standard.set(Array(known), forKey: key)
    }

    /// Complete transfers whose `contentFolder` has never been incrementally indexed.
    public static func unmarkedFolders(in transfers: [TorrentRow]) -> [String] {
        let known = load()
        return transfers.filter(\.isComplete).compactMap(\.contentFolder).filter { !known.contains($0) }
    }
}