feat: add pause and resume functionality

- implement pause and resume commands in the Pomodoro package
- modify timer logic to handle paused state
- adjust client command handling for pause and resume actions
- update HTML to include pause/resume button

🤖

internal/pomodoro/pomodoro.go

@@ -13,12 +13,20 @@ const (
 )
 
 var pomodoroRunning bool
+var pomodoroPaused bool
+
+var pomodoroStopChannel = make(chan bool, 1)
+var pomodoroPauseChannel = make(chan bool, 1)
+var pomodoroResumeChannel = make(chan bool, 1)
+
 var mu sync.Mutex // to synchronize access to shared state
 
 // RunPomodoroTimer iterates the Pomodoro work/break sessions.
 func RunPomodoroTimer(clients map[*websocket.Conn]bool) {
 	mu.Lock()
 	pomodoroRunning = true
+	pomodoroPaused = false
+	mu.Unlock()
 
 	for session := 1; session <= sessions; session++ {
 		if !startTimer(clients, workDuration, "Work", session) {
@@ -35,11 +43,32 @@ func RunPomodoroTimer(clients map[*websocket.Conn]bool) {
 		}
 	}
 
+	mu.Lock()
 	pomodoroRunning = false
 	mu.Unlock()
 }
 
-// IsPomodoroRunning returns the status of the timer.
+// StopPomodoro sends a signal to stop the running Pomodoro timer.
+func StopPomodoro() {
+	pomodoroStopChannel <- true
+}
+
+func PausePomodoro() {
+	pomodoroPauseChannel <- true
+}
+
+func ResumePomodoro() {
+	pomodoroResumeChannel <- true
+}
+
 func IsPomodoroRunning() bool {
+	mu.Lock()
+	defer mu.Unlock() // Ensures that the mutex is unlocked after the function is done
 	return pomodoroRunning
 }
+
+func IsPomodoroPaused() bool {
+	mu.Lock()
+	defer mu.Unlock() // Ensures that the mutex is unlocked after the function is done
+	return pomodoroPaused
+}