create Gathering component for picking up honeydew

scripts/units/components/gathering.gd

@@ -0,0 +1,42 @@
+extends Area3D
+class_name Gathering
+
+enum GatherState {
+	PICKING_UP,
+	DEPOSITING,
+}
+
+var items: Dictionary = {}
+var max_carrying: int = 3
+var carrying: int = 0
+var state: GatherState = GatherState.PICKING_UP
+var target: Honeydew
+
+
+func _ready() -> void:
+	body_entered.connect(_on_body_entered)
+	body_exited.connect(_on_body_exited)
+
+
+func gather(item: Honeydew)->void:
+	target = item
+	state = GatherState.PICKING_UP
+
+
+func _on_body_entered(item: Node3D) -> void:
+	if item is not Honeydew:
+		return
+
+	var item_id := item.get_instance_id()
+	if items.keys().has(item_id):
+		return
+	
+	items[item_id] = item
+
+
+func _on_body_exited(item: Node3D) -> void:
+	var item_id := item.get_instance_id()
+	if not items.keys().has(item_id):
+		return
+	
+	items.erase(item_id)