feat: add emergent world foundations

world/targets/WorldTargetCapability.gd

@@ -0,0 +1,52 @@
+class_name WorldTargetCapability
+extends RefCounted
+
+var _capability_id: StringName
+var _attributes: Dictionary
+
+
+func _init(capability_id: StringName = &"", attributes: Dictionary = {}) -> void:
+	_capability_id = capability_id
+	_attributes = attributes.duplicate(true)
+
+
+func is_valid() -> bool:
+	return not _capability_id.is_empty() and not _contains_object(_attributes)
+
+
+func get_capability_id() -> StringName:
+	return _capability_id
+
+
+func get_attributes() -> Dictionary:
+	return _attributes.duplicate(true)
+
+
+func get_attribute(attribute_id: StringName, default_value: Variant = null) -> Variant:
+	var value: Variant = _attributes.get(String(attribute_id), default_value)
+	return value.duplicate(true) if value is Array or value is Dictionary else value
+
+
+func to_dictionary() -> Dictionary:
+	return {
+		"capability_id": String(_capability_id),
+		"attributes": _attributes.duplicate(true),
+	}
+
+
+func copy() -> WorldTargetCapability:
+	return WorldTargetCapability.new(_capability_id, _attributes)
+
+
+static func _contains_object(value: Variant) -> bool:
+	if value is Object:
+		return true
+	if value is Array:
+		for item in value:
+			if _contains_object(item):
+				return true
+	elif value is Dictionary:
+		for key in value:
+			if _contains_object(key) or _contains_object(value[key]):
+				return true
+	return false