Prevent address field changes from triggering update_order_review AJAX calls

gistfile1.txt

class WFACP_Prevent_Address_Field_Updates {

	/**
	 * Address fields that shouldn't trigger order review updates
	 *
	 * @var array
	 */
	private $address_fields = array(
		'billing_postcode',
		'billing_city',
		'billing_address_1',
		'billing_address_2',
		'billing_state',
		'billing_country',
		'billing_company',
		'shipping_postcode',
		'shipping_city',
		'shipping_address_1',
		'shipping_address_2',
		'shipping_state',
		'shipping_country',
		'shipping_company',
	);

	/**
	 * Constructor
	 */
	public function __construct() {
		// Only run if FunnelKit Checkout is active
		if ( ! class_exists( 'WFACP_Core' ) ) {
			return;
		}

		// Hook into WFACP field filters
		add_filter( 'wfacp_billing_field', array( $this, 'remove_update_totals_class' ), 10, 2 );
		add_filter( 'wfacp_shipping_field', array( $this, 'remove_update_totals_class' ), 10, 2 );

		// Also handle default address fields filter as a fallback
		add_filter( 'wfacp_default_billing_address_fields', array( $this, 'remove_update_totals_from_default_fields' ), 20 );
		add_filter( 'wfacp_default_shipping_address_fields', array( $this, 'remove_update_totals_from_default_fields' ), 20 );
	}

	/**
	 * Remove update_totals_on_change class from address fields
	 *
	 * @param array  $field Field configuration array
	 * @param string $key   Field key (e.g., 'billing_postcode')
	 * @return array Modified field configuration
	 */
	public function remove_update_totals_class( $field, $key ) {
		// Check if this is an address field we want to modify
		if ( ! in_array( $key, $this->address_fields, true ) ) {
			return $field;
		}

		// Ensure class is an array
		if ( ! isset( $field['class'] ) || ! is_array( $field['class'] ) ) {
			return $field;
		}

		// Remove update_totals_on_change class
		$field['class'] = array_values( array_diff( $field['class'], array( 'update_totals_on_change' ) ) );

		return $field;
	}

	/**
	 * Remove update_totals_on_change from default address fields
	 *
	 * This handles fields that might be added via the default fields filter
	 * Note: Default fields have keys without 'billing_'/'shipping_' prefix (e.g., 'postcode', 'city')
	 *
	 * @param array $fields Default address fields array
	 * @return array Modified fields array
	 */
	public function remove_update_totals_from_default_fields( $fields ) {
		if ( ! is_array( $fields ) ) {
			return $fields;
		}

		// Fields that should not trigger updates (without prefix)
		$default_field_keys = array( 'postcode', 'city', 'address_1', 'address_2', 'state', 'country', 'company' );

		foreach ( $fields as $key => $field ) {
			// Check if this is an address field we want to modify
			// Default fields have keys like 'postcode', 'city', etc. (without prefix)
			if ( ! in_array( $key, $default_field_keys, true ) ) {
				continue;
			}

			// Ensure class is an array
			if ( ! isset( $field['class'] ) || ! is_array( $field['class'] ) ) {
				continue;
			}

			// Remove update_totals_on_change class
			$fields[ $key ]['class'] = array_values( array_diff( $field['class'], array( 'update_totals_on_change' ) ) );
		}

		return $fields;
	}
}

// Initialize the address field update prevention
// Works specifically with FunnelKit Checkout (WFACP)
if ( function_exists( 'is_checkout' ) && class_exists( 'WFACP_Core' ) ) {
	new WFACP_Prevent_Address_Field_Updates();
}