passepartout-apple/Passepartout/App/macOS/Launcher/AppDelegate.swift

//
//  AppDelegate.swift
//  Passepartout
//
//  Created by Davide De Rosa on 12/16/20.
//  Copyright (c) 2021 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout 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
//  (at your option) any later version.
//
//  Passepartout 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 Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import Cocoa

extension Notification.Name {
    static let killLauncher = Notification.Name("killLauncher")
}

@NSApplicationMain
class AppDelegate: NSObject {
    @objc func terminate() {
        NSApp.terminate(nil)
    }
}

extension AppDelegate: NSApplicationDelegate {
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let mainAppIdentifier = "com.algoritmico.ios.Passepartout" // XXX: hardcoded
        let runningApps = NSWorkspace.shared.runningApplications
        let isRunning = !runningApps.filter { $0.bundleIdentifier == mainAppIdentifier }.isEmpty

        if !isRunning {
            DistributedNotificationCenter.default().addObserver(self, selector: #selector(terminate), name: .killLauncher, object: mainAppIdentifier)

            let path = Bundle.main.bundlePath as NSString
            var components = path.pathComponents
            components.removeLast()
            components.removeLast()
            components.removeLast()
            components.append("MacOS")
            components.append("Passepartout") // XXX: hardcoded

            let newPath = NSString.path(withComponents: components)

            NSWorkspace.shared.launchApplication(newPath)
        } else {
            terminate()
        }
    }
}