woocommerce/includes/class-wc-order-item-coupon.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Order Line Item (coupon).
 *
 * @version     2.7.0
 * @since       2.7.0
 * @package     WooCommerce/Classes
 * @author      WooThemes
 */
class WC_Order_Item_Coupon extends WC_Order_Item {

	/**
	 * Order Data array. This is the core order data exposed in APIs since 2.7.0.
	 * @since 2.7.0
	 * @var array
	 */
	protected $_data = array(
		'order_id'     => 0,
		'id'           => 0,
		'code'         => '',
		'discount'     => 0,
		'discount_tax' => 0,
	);

	/**
	 * offsetGet for ArrayAccess/Backwards compatibility.
	 * @deprecated Add deprecation notices in future release.
	 * @param string $offset
	 * @return mixed
	 */
	public function offsetGet( $offset ) {
		if ( 'discount_amount' === $offset ) {
			$offset = 'discount';
		} elseif ( 'discount_amount_tax' === $offset ) {
			$offset = 'discount_tax';
		}
		return parent::offsetGet( $offset );
	}

	/**
	 * offsetSet for ArrayAccess/Backwards compatibility.
	 * @deprecated Add deprecation notices in future release.
	 * @param string $offset
	 * @param mixed $value
	 */
	public function offsetSet( $offset, $value ) {
		if ( 'discount_amount' === $offset ) {
			$offset = 'discount';
		} elseif ( 'discount_amount_tax' === $offset ) {
			$offset = 'discount_tax';
		}
		parent::offsetSet( $offset, $value );
	}

	/**
	 * offsetExists for ArrayAccess
	 * @param string $offset
	 * @return bool
	 */
	public function offsetExists( $offset ) {
		if ( in_array( $offset, array( 'discount_amount', 'discount_amount_tax' ) ) ) {
			return true;
		}
		return parent::offsetExists( $offset );
	}

	/**
	 * Read/populate data properties specific to this order item.
	 */
	public function read( $id ) {
		parent::read( $id );

		if ( ! $this->get_id() ) {
			return;
		}

		$this->set_props( array(
			'discount'     => get_metadata( 'order_item', $this->get_id(), 'discount_amount', true ),
			'discount_tax' => get_metadata( 'order_item', $this->get_id(), 'discount_amount_tax', true ),
		) );
	}

	/**
	 * Save properties specific to this order item.
	 * @return int Item ID
	 */
	public function save() {
		parent::save();
		if ( $this->get_id() ) {
			wc_update_order_item_meta( $this->get_id(), 'discount_amount', $this->get_discount() );
			wc_update_order_item_meta( $this->get_id(), 'discount_amount_tax', $this->get_discount_tax() );
		}

		return $this->get_id();
	}

	/**
	 * Internal meta keys we don't want exposed as part of meta_data.
	 * @return array()
	 */
	protected function get_internal_meta_keys() {
		return array( 'discount_amount', 'discount_amount_tax' );
	}

	/*
	|--------------------------------------------------------------------------
	| Setters
	|--------------------------------------------------------------------------
	*/

	/**
	 * Set order item name.
	 * @param string $value
	 * @throws WC_Data_Exception
	 */
	public function set_name( $value ) {
		return $this->set_code( $value );
	}

	/**
	 * Set code.
	 * @param string $value
	 * @throws WC_Data_Exception
	 */
	public function set_code( $value ) {
		$this->_data['code'] = wc_clean( $value );
	}

	/**
	 * Set discount amount.
	 * @param string $value
	 * @throws WC_Data_Exception
	 */
	public function set_discount( $value ) {
		$this->_data['discount'] = wc_format_decimal( $value );
	}

	/**
	 * Set discounted tax amount.
	 * @param string $value
	 * @throws WC_Data_Exception
	 */
	public function set_discount_tax( $value ) {
		$this->_data['discount_tax'] = wc_format_decimal( $value );
	}

	/*
	|--------------------------------------------------------------------------
	| Getters
	|--------------------------------------------------------------------------
	*/

	/**
	 * Get order item type.
	 * @return string
	 */
	public function get_type() {
		return 'coupon';
	}

	/**
	 * Get order item name.
	 * @return string
	 */
	public function get_name() {
		return $this->get_code();
	}

	/**
	 * Get coupon code.
	 * @return string
	 */
	public function get_code() {
		return $this->_data['code'];
	}

	/**
	 * Get discount amount.
	 * @return string
	 */
	public function get_discount() {
		return wc_format_decimal( $this->_data['discount'] );
	}

	/**
	 * Get discounted tax amount.
	 * @return string
	 */
	public function get_discount_tax() {
		return wc_format_decimal( $this->_data['discount_tax'] );
	}
}