add beehave

addons/beehave/nodes/leaves/blackboard_compare.gd

@@ -0,0 +1,65 @@
+@tool
+class_name BlackboardCompareCondition extends ConditionLeaf
+
+## Compares two values using the specified comparison operator.
+## Returns [code]FAILURE[/code] if any of the expression fails or the
+## comparison operation returns [code]false[/code], otherwise it returns [code]SUCCESS[/code].
+
+enum Operators {
+	EQUAL,
+	NOT_EQUAL,
+	GREATER,
+	LESS,
+	GREATER_EQUAL,
+	LESS_EQUAL,
+}
+
+## Expression represetning left operand.
+## This value can be any valid GDScript expression.
+## In order to use the existing blackboard keys for comparison,
+## use get_value("key_name") e.g. get_value("direction").length()
+@export_placeholder(EXPRESSION_PLACEHOLDER) var left_operand: String = ""
+## Comparison operator.
+@export_enum("==", "!=", ">", "<", ">=", "<=") var operator: int = 0
+## Expression represetning right operand.
+## This value can be any valid GDScript expression.
+## In order to use the existing blackboard keys for comparison,
+## use get_value("key_name") e.g. get_value("direction").length()
+@export_placeholder(EXPRESSION_PLACEHOLDER) var right_operand: String = ""
+
+@onready var _left_expression: Expression = _parse_expression(left_operand)
+@onready var _right_expression: Expression = _parse_expression(right_operand)
+
+
+func tick(actor: Node, blackboard: Blackboard) -> int:
+	var left: Variant = _left_expression.execute([], blackboard)
+
+	if _left_expression.has_execute_failed():
+		return FAILURE
+
+	var right: Variant = _right_expression.execute([], blackboard)
+
+	if _right_expression.has_execute_failed():
+		return FAILURE
+
+	var result: bool = false
+
+	match operator:
+		Operators.EQUAL:
+			result = left == right
+		Operators.NOT_EQUAL:
+			result = left != right
+		Operators.GREATER:
+			result = left > right
+		Operators.LESS:
+			result = left < right
+		Operators.GREATER_EQUAL:
+			result = left >= right
+		Operators.LESS_EQUAL:
+			result = left <= right
+
+	return SUCCESS if result else FAILURE
+
+
+func _get_expression_sources() -> Array[String]:
+	return [left_operand, right_operand]