Refactor screensaver package into display and lockscreen

lockscreen/lockscreen.go

@@ -0,0 +1,26 @@
+package lockscreen
+
+import (
+	"os/exec"
+	"strings"
+)
+
+
+// IsActive checks whether the screen is locked (checks if the screensaver is active)
+func IsActive() (bool, error) {
+	cmd := exec.Command("qdbus",
+		"org.kde.screensaver",
+		"/ScreenSaver",
+		"org.freedesktop.ScreenSaver.GetActive",
+	)
+	outputBytes, err := cmd.CombinedOutput()
+	if err != nil {
+		return false, err
+	}
+	output := string(outputBytes)
+
+	if strings.HasPrefix(output, "true") {
+		return true, nil
+	}
+	return false, nil
+}