ui-time: 15 minutes of uninterrupted time

Challenge yourself to focus on the task at hand for 15 minutes!
This SwiftUI application displays a 15-minute countdown timer in the macOS menu bar.
The user can reset the timer to 15 minutes by clicking "Another round of uninterrupted time!" or quit the app using the "Quit" button.

`./ui-time/ui_timeApp.swift`

import SwiftUI

// TimerViewModel is an ObservableObject that handles the timer logic and updates the current time displayed in the menu bar.
class TimerViewModel: ObservableObject {
    // currentTime is a published variable that stores the current time as a string, initially set to "15:00".
    @Published var currentTime: String = "15:00"
    // remainingTime is a private variable that stores the remaining time in seconds.
    private var remainingTime: TimeInterval = 15 * 60
    // timer is a private optional Timer variable that will be used to schedule and manage the timer.
    private var timer: Timer? = nil

    // The init method starts the timer when TimerViewModel is initialized.
    init() {
        startTimer()
    }

    // The startTimer method invalidates any existing timer, creates a new timer, and schedules it to update the remainingTime.
    private func startTimer() {
        timer?.invalidate()
        timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { _ in
            if self.remainingTime > 0 {
                self.remainingTime -= 1
                self.currentTime = self.formatTime(self.remainingTime)
            } else {
                self.timer?.invalidate()
            }
        }
    }

    // The formatTime method formats the given time interval into a string in the "mm:ss" format.
    private func formatTime(_ time: TimeInterval) -> String {
        let minutes = Int(time) / 60 % 60
        let seconds = Int(time) % 60
        return String(format: "%02d:%02d", minutes, seconds)
    }

    // The resetTimer method resets the remainingTime to 15 minutes and 1 second and starts the timer.
    func resetTimer() {
        remainingTime = 15 * 60 + 1
        startTimer()
    }
}

// The main App struct creates a timerViewModel and displays the timer in the menu bar with action buttons.
@main
struct ui_timeApp: App {
    // timerViewModel is a StateObject that will manage the timer logic and display the current time.
    @StateObject private var timerViewModel = TimerViewModel()

    // body defines the app scene that includes a menu bar with the current time, a reset button, and a quit button.
    var body: some Scene {
        MenuBarExtra(timerViewModel.currentTime) {
            // Reset button with a keyboard shortcut "r" to reset the timer.
            Button("Another round of uninterrupted time!") {
                timerViewModel.resetTimer()
            }
            .keyboardShortcut("r")

            // Divider to separate the reset button from the quit button.
            Divider()

            // Quit button with a keyboard shortcut "q" to quit the app.
            Button("Quit") {
                NSApplication.shared.terminate(nil)
            }
            .keyboardShortcut("q")
        }
    }
}

On the next version:

Align the timer text mm:ss using the separator :
Sync the timer to the system time.
Make an app icon.

star-bits/ui-time

ui-time: 15 minutes of uninterrupted time

./ui-time/ui_timeApp.swift

On the next version:

`./ui-time/ui_timeApp.swift`