Flashing component

scripts/components/flashing_component.gd

@@ -0,0 +1,55 @@
+class_name FlashingComponent
+extends Node
+
+@export var sprite: Node2D
+@export var flash_duration: float = 0.5
+@export var flash_time: float = 0.1
+@export var use_modulate: bool = true
+@export var health_component: HealthComponent
+
+var tween: Tween
+
+
+func _ready() -> void:
+	if health_component:
+		health_component.on_health_change.connect(on_health_change)
+		health_component.on_death.connect(on_death)
+
+	if not sprite:
+		printerr("No sprite assigned!")
+		return
+
+
+func start_flashing() -> void:
+	if not sprite:
+		return
+
+	if tween:
+		tween.kill()
+
+	tween = create_tween()
+	tween.set_parallel(false)
+
+	var flashes: int = int(flash_duration / flash_time)
+	for i in range(flashes):
+		var opacity: float = 0.3 if i % 2 == 0 else 1.0
+		tween.tween_property(sprite, "modulate:a" if use_modulate else "visible", opacity if use_modulate else float(i % 2 == 0), flash_time)
+
+	tween.tween_callback(stop_flashing)
+
+
+func stop_flashing() -> void:
+	if use_modulate:
+		sprite.modulate.a = 1.0
+	else:
+		sprite.visible = true
+		
+
+func on_health_change(delta: float, _total_health: float) -> void:
+	if delta < 0:
+		start_flashing()
+
+
+func on_death() -> void:
+	stop_flashing()
+