Implement proof of concept core logic (requires refactor)

main.go

@@ -2,12 +2,70 @@ package main
 
 import(
 	"after-lock/evdev"
-	"log"
+	"after-lock/screensaver"
+	"after-lock/atomicflag"
+	"time"
+	"sync"
 )
 
+const (
+	initialDelay = 3
+	loopDelay = 6
+	keyboardDeviceNode = "/dev/input/by-id/usb-Dell_Dell_USB_Entry_Keyboard-event-kbd"
+)
+
+
 func main() {
-	err := evdev.BlockUntilKeypress("/dev/input/by-id/usb-Dell_Dell_USB_Entry_Keyboard-event-kbd")
-	if err != nil {
-		log.Fatal(err)
+	var wg sync.WaitGroup
+	wg.Add(1)
+	stopFlag := atomicflag.New(false)
+	keypressFlag := atomicflag.New(false)
+
+	go func() {
+		for {
+			err := evdev.BlockUntilKeypress(keyboardDeviceNode)
+			if err != nil {
+				panic(err)
+			}
+			if stopFlag.Get() {
+				wg.Done()
+				return
+			} else {
+				keypressFlag.Set(true)
+			}
+		}
+	}()
+
+	time.Sleep(initialDelay * time.Second)
+	for {
+		active, err := screensaver.IsActive()
+		if err != nil {
+			panic(err)
+		}
+		if !active {
+			stopFlag.Set(true)
+			wg.Wait()
+			return
+		}
+
+		shouldSleepDisplay, err := screensaver.ShouldBeActive()
+		if err != nil {
+			panic(err)
+		}
+		if shouldSleepDisplay {
+			err := screensaver.Activate()
+			if err != nil {
+				panic(err)
+			}
+			for {
+				time.Sleep(loopDelay * time.Second)
+				if keypressFlag.Get() {
+					keypressFlag.Set(false)
+					continue
+				} else {
+					break
+				}
+			}
+		}
 	}
 }