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<?php
/**
* Cart fees API.
*
* Developers can add fees to the cart via KKART()->cart->fees_api() which will reference this class.
*
* We suggest using the action kkart_cart_calculate_fees hook for adding fees.
*
* @package Kkart\Classes
* @version 3.2.0
*/
defined( 'ABSPATH' ) || exit;
/**
* KKART_Cart_Fees class.
*
* @since 3.2.0
*/
final class KKART_Cart_Fees {
/**
* An array of fee objects.
*
* @var object[]
*/
private $fees = array();
/**
* Reference to cart object.
*
* @since 3.2.0
* @var KKART_Cart
*/
private $cart;
/**
* New fees are made out of these props.
*
* @var array
*/
private $default_fee_props = array(
'id' => '',
'name' => '',
'tax_class' => '',
'taxable' => false,
'amount' => 0,
'total' => 0,
);
/**
* Constructor. Reference to the cart.
*
* @since 3.2.0
* @throws Exception If missing KKART_Cart object.
* @param KKART_Cart $cart Cart object.
*/
public function __construct( &$cart ) {
if ( ! is_a( $cart, 'KKART_Cart' ) ) {
throw new Exception( 'A valid KKART_Cart object is required' );
}
$this->cart = $cart;
}
/**
* Register methods for this object on the appropriate WordPress hooks.
*/
public function init() {}
/**
* Add a fee. Fee IDs must be unique.
*
* @since 3.2.0
* @param array $args Array of fee properties.
* @return object Either a fee object if added, or a WP_Error if it failed.
*/
public function add_fee( $args = array() ) {
$fee_props = (object) wp_parse_args( $args, $this->default_fee_props );
$fee_props->name = $fee_props->name ? $fee_props->name : __( 'Fee', 'kkart' );
$fee_props->tax_class = in_array( $fee_props->tax_class, array_merge( KKART_Tax::get_tax_classes(), KKART_Tax::get_tax_class_slugs() ), true ) ? $fee_props->tax_class : '';
$fee_props->taxable = kkart_string_to_bool( $fee_props->taxable );
$fee_props->amount = kkart_format_decimal( $fee_props->amount );
if ( empty( $fee_props->id ) ) {
$fee_props->id = $this->generate_id( $fee_props );
}
if ( array_key_exists( $fee_props->id, $this->fees ) ) {
return new WP_Error( 'fee_exists', __( 'Fee has already been added.', 'kkart' ) );
}
$this->fees[ $fee_props->id ] = $fee_props;
return $this->fees[ $fee_props->id ];
}
/**
* Get fees.
*
* @return array
*/
public function get_fees() {
uasort( $this->fees, array( $this, 'sort_fees_callback' ) );
return $this->fees;
}
/**
* Set fees.
*
* @param object[] $raw_fees Array of fees.
*/
public function set_fees( $raw_fees = array() ) {
$this->fees = array();
foreach ( $raw_fees as $raw_fee ) {
$this->add_fee( $raw_fee );
}
}
/**
* Remove all fees.
*
* @since 3.2.0
*/
public function remove_all_fees() {
$this->set_fees();
}
/**
* Sort fees by amount.
*
* @param stdClass $a Fee object.
* @param stdClass $b Fee object.
* @return int
*/
protected function sort_fees_callback( $a, $b ) {
/**
* Filter sort fees callback.
*
* @since 3.8.0
* @param int Sort order, -1 or 1.
* @param stdClass $a Fee object.
* @param stdClass $b Fee object.
*/
return apply_filters( 'kkart_sort_fees_callback', $a->amount > $b->amount ? -1 : 1, $a, $b );
}
/**
* Generate a unique ID for the fee being added.
*
* @param string $fee Fee object.
* @return string fee key.
*/
private function generate_id( $fee ) {
return sanitize_title( $fee->name );
}
}