<?php
/**
 * Rule processor that performs an OR operation on the rule's left and right
 * operands.
 */

namespace Automattic\WooCommerce\Admin\RemoteSpecs\RuleProcessors;

defined( 'ABSPATH' ) || exit;

/**
 * Rule processor that performs an OR operation on the rule's left and right
 * operands.
 */
class OrRuleProcessor implements RuleProcessorInterface {

	/**
	 * Rule evaluator to use.
	 *
	 * @var RuleEvaluator
	 */
	private $rule_evaluator;


	/**
	 * Constructor.
	 *
	 * @param RuleEvaluator $rule_evaluator The rule evaluator to use.
	 */
	public function __construct( $rule_evaluator = null ) {
		$this->rule_evaluator = null === $rule_evaluator
			? new RuleEvaluator()
			: $rule_evaluator;
	}

	/**
	 * Performs an OR operation on the rule's left and right operands.
	 *
	 * @param object $rule         The specific rule being processed by this rule processor.
	 * @param object $stored_state Stored state.
	 *
	 * @return bool The result of the operation.
	 */
	public function process( $rule, $stored_state ) {
		foreach ( $rule->operands as $operand ) {
			$evaluated_operand = $this->rule_evaluator->evaluate(
				$operand,
				$stored_state
			);

			if ( $evaluated_operand ) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Validates the rule.
	 *
	 * @param object $rule The rule to validate.
	 *
	 * @return bool Pass/fail.
	 */
	public function validate( $rule ) {
		if ( ! isset( $rule->operands ) || ! is_array( $rule->operands ) ) {
			return false;
		}

		return true;
	}
}