clsource · February 2, 2024 14:59 · Feb 2, 2024
diff --git a/timer.go b/timer.go
@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"sync/atomic"
+	"time"
+)
+
+type SecondsCounter struct {
+	count int32
+}
+
+func pad_number(number int32) string {
+	if number < 10 {
+		return fmt.Sprintf("0%d", number)
+	}
+	return fmt.Sprintf("%d", number)
+}
+
+func format_timer(seconds int32) string {
+	return fmt.Sprintf("%s:%s", pad_number((seconds%3600)/60), pad_number((seconds%3600)%60))
+}
+
+func print_timer(seconds *SecondsCounter) {
+	fmt.Println(format_timer(atomic.LoadInt32(&seconds.count)))
+}
+
+func add_to_timer(seconds *SecondsCounter, amount int32) {
+	atomic.AddInt32(&seconds.count, amount)
+}
+
+func main() {
+	ticker := time.NewTicker(1000 * time.Millisecond)
+	done := make(chan bool)
+
+	seconds := new(SecondsCounter)
+
+	add_to_timer(seconds, 300)
+	print_timer(seconds)
+
+	go func() {
+		for {
+			select {
+			case <-done:
+				return
+			case <-ticker.C:
+				add_to_timer(seconds, -1)
+				print_timer(seconds)
+			}
+		}
+	}()
+
+	time.Sleep(5 * time.Minute)
+	ticker.Stop()
+	done <- true
+	fmt.Println("Timer Done")
+}