kiwix-apple/Model/Hotspot/Hotspot.swift

// This file is part of Kiwix for iOS & macOS.
//
// Kiwix is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// any later version.
//
// Kiwix is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Kiwix; If not, see https://www.gnu.org/licenses/.

import Foundation
import Defaults

final class Hotspot {
    
    @MainActor
    static let shared = Hotspot()
    
    private static let minPort = 1024
    nonisolated static let defaultPort = 8080
    private static let maxPort = 9999
    
    @MainActor
    @Published var isStarted: Bool = false
    
    @ZimActor
    private var hotspot: KiwixHotspot? {
        didSet {
            let started = hotspot != nil
            Task { @MainActor [weak self] in
                self?.isStarted = started
            }
        }
    }

    @ZimActor
    func startWith(zimFileIds: Set<UUID>) async {
        guard hotspot == nil else { return }
        guard !zimFileIds.isEmpty else {
            debugPrint("no zim files were set for Hotspot to start")
            return
        }
        let portNumber = Int32(Defaults[.hotspotPortNumber])
        hotspot = KiwixHotspot(__zimFileIds: zimFileIds, onPort: portNumber)
    }
    
    @ZimActor
    func stop() async {
        guard let hotspot else { return }
        hotspot.__stop()
        self.hotspot = nil
    }
    
    @MainActor
    func serverAddress() async -> URL? {
        guard let address = await self.hotspot?.__address() else {
            return nil
        }
        return URL(string: address)
    }
    
    nonisolated static func isValid(port: Int) -> Bool {
        switch port {
        case minPort...maxPort: return true
        default: return false
        }
    }
    
    nonisolated static var invalidPortMessage: String {
        LocalString.hotspot_settings_invalid_port_message(withArgs: "\(minPort)", "\(maxPort)")
    }
}