670 lines
22 KiB
PHP
670 lines
22 KiB
PHP
<?php
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/**
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* WooCommerce coupons
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*
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* The WooCommerce coupons class gets coupon data from storage and checks coupon validity
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*
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* @class WC_Coupon
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* @package WooCommerce/Classes
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* @category Class
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* @author WooThemes
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*/
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class WC_Coupon {
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// Coupon message codes
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const E_WC_COUPON_INVALID_FILTERED = 100;
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const E_WC_COUPON_INVALID_REMOVED = 101;
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const E_WC_COUPON_NOT_YOURS_REMOVED = 102;
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const E_WC_COUPON_ALREADY_APPLIED = 103;
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const E_WC_COUPON_ALREADY_APPLIED_INDIV_USE_ONLY = 104;
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const E_WC_COUPON_NOT_EXIST = 105;
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const E_WC_COUPON_USAGE_LIMIT_REACHED = 106;
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const E_WC_COUPON_EXPIRED = 107;
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const E_WC_COUPON_MIN_SPEND_LIMIT_NOT_MET = 108;
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const E_WC_COUPON_NOT_APPLICABLE = 109;
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const E_WC_COUPON_NOT_VALID_SALE_ITEMS = 110;
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const E_WC_COUPON_PLEASE_ENTER = 111;
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const WC_COUPON_SUCCESS = 200;
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const WC_COUPON_REMOVED = 201;
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/** @public string Coupon code. */
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public $code;
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/** @public int Coupon ID. */
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public $id;
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/** @public string Type of discount. */
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public $type;
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/** @public string Type of discount (alias). */
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public $discount_type;
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/** @public string Coupon amount. */
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public $amount;
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/** @public string "Yes" if for individual use. */
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public $individual_use;
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/** @public array Array of product IDs. */
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public $product_ids;
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/** @public int Coupon usage limit. */
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public $usage_limit;
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/** @public int Coupon usage limit per user. */
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public $usage_limit_per_user;
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/** @public int Coupon usage limit per item. */
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public $limit_usage_to_x_items;
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/** @public int Coupon usage count. */
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public $usage_count;
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/** @public string Expiry date. */
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public $expiry_date;
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/** @public string "yes" if applied before tax. */
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public $apply_before_tax;
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/** @public string "yes" if coupon grants free shipping. */
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public $free_shipping;
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/** @public array Array of category ids. */
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public $product_categories;
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/** @public array Array of category ids. */
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public $exclude_product_categories;
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/** @public string "yes" if coupon does NOT apply to items on sale. */
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public $exclude_sale_items;
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/** @public string Minimum cart amount. */
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public $minimum_amount;
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/** @public string Coupon owner's email. */
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public $customer_email;
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/** @public array Post meta. */
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public $coupon_custom_fields;
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/** @public string How much the coupon is worth. */
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public $coupon_amount;
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/** @public string Error message. */
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public $error_message;
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/**
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* Coupon constructor. Loads coupon data.
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*
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* @access public
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* @param mixed $code code of the coupon to load
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*/
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public function __construct( $code ) {
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global $wpdb;
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$this->code = apply_filters( 'woocommerce_coupon_code', $code );
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// Coupon data lets developers create coupons through code
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$coupon_data = apply_filters( 'woocommerce_get_shop_coupon_data', false, $code );
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if ( $coupon_data ) {
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$this->id = absint( $coupon_data['id'] );
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$this->type = esc_html( $coupon_data['type'] );
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$this->amount = esc_html( $coupon_data['amount'] );
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$this->individual_use = esc_html( $coupon_data['individual_use'] );
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$this->product_ids = is_array( $coupon_data['product_ids'] ) ? $coupon_data['product_ids'] : array();
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$this->exclude_product_ids = is_array( $coupon_data['exclude_product_ids'] ) ? $coupon_data['exclude_product_ids'] : array();
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$this->usage_limit = absint( $coupon_data['usage_limit'] );
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$this->usage_limit_per_user = isset( $coupon_data['usage_limit_per_user'] ) ? absint( $coupon_data['usage_limit_per_user'] ) : 0;
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$this->limit_usage_to_x_items = isset( $coupon_data['limit_usage_to_x_items'] ) ? absint( $coupon_data['limit_usage_to_x_items'] ) : '';
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$this->usage_count = absint( $coupon_data['usage_count'] );
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$this->expiry_date = esc_html( $coupon_data['expiry_date'] );
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$this->apply_before_tax = esc_html( $coupon_data['apply_before_tax'] );
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$this->free_shipping = esc_html( $coupon_data['free_shipping'] );
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$this->product_categories = is_array( $coupon_data['product_categories'] ) ? $coupon_data['product_categories'] : array();
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$this->exclude_product_categories = is_array( $coupon_data['exclude_product_categories'] ) ? $coupon_data['exclude_product_categories'] : array();
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$this->exclude_sale_items = esc_html( $coupon_data['exclude_sale_items'] );
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$this->minimum_amount = esc_html( $coupon_data['minimum_amount'] );
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$this->customer_email = esc_html( $coupon_data['customer_email'] );
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} else {
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$coupon_id = $wpdb->get_var( $wpdb->prepare( apply_filters( 'woocommerce_coupon_code_query', "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type = 'shop_coupon' AND post_status = 'publish'" ), $this->code ) );
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if ( ! $coupon_id )
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return;
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$coupon = get_post( $coupon_id );
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$this->post_title = apply_filters( 'woocommerce_coupon_code', $coupon->post_title );
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if ( empty( $coupon ) || $this->code !== $this->post_title )
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return;
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$this->id = $coupon->ID;
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$this->coupon_custom_fields = get_post_meta( $this->id );
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$load_data = array(
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'discount_type' => 'fixed_cart',
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'coupon_amount' => 0,
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'individual_use' => 'no',
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'product_ids' => '',
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'exclude_product_ids' => '',
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'usage_limit' => '',
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'usage_limit_per_user' => '',
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'limit_usage_to_x_items' => '',
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'usage_count' => '',
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'expiry_date' => '',
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'apply_before_tax' => 'yes',
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'free_shipping' => 'no',
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'product_categories' => array(),
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'exclude_product_categories' => array(),
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'exclude_sale_items' => 'no',
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'minimum_amount' => '',
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'customer_email' => array()
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);
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foreach ( $load_data as $key => $default )
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$this->$key = isset( $this->coupon_custom_fields[ $key ][0] ) && $this->coupon_custom_fields[ $key ][0] !== '' ? $this->coupon_custom_fields[ $key ][0] : $default;
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// Alias
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$this->type = $this->discount_type;
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$this->amount = $this->coupon_amount;
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// Formatting
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$this->product_ids = array_filter( array_map( 'trim', explode( ',', $this->product_ids ) ) );
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$this->exclude_product_ids = array_filter( array_map( 'trim', explode( ',', $this->exclude_product_ids ) ) );
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$this->expiry_date = $this->expiry_date ? strtotime( $this->expiry_date ) : '';
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$this->product_categories = array_filter( array_map( 'trim', (array) maybe_unserialize( $this->product_categories ) ) );
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$this->exclude_product_categories = array_filter( array_map( 'trim', (array) maybe_unserialize( $this->exclude_product_categories ) ) );
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$this->customer_email = array_filter( array_map( 'trim', array_map( 'strtolower', (array) maybe_unserialize( $this->customer_email ) ) ) );
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}
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do_action( 'woocommerce_coupon_loaded', $this );
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}
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/**
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* Check if coupon needs applying before tax.
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*
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* @access public
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* @return bool
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*/
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public function apply_before_tax() {
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return $this->apply_before_tax == 'yes' ? true : false;
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}
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/**
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* Check if a coupon enables free shipping.
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*
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* @access public
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* @return bool
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*/
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public function enable_free_shipping() {
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return $this->free_shipping == 'yes' ? true : false;
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}
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/**
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* Check if a coupon excludes sale items.
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*
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* @access public
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* @return bool
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*/
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public function exclude_sale_items() {
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return $this->exclude_sale_items == 'yes' ? true : false;
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}
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/**
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* Increase usage count fo current coupon.
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*
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* @access public
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* @param string $used_by Either user ID or billing email
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* @return void
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*/
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public function inc_usage_count( $used_by = '' ) {
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$this->usage_count++;
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update_post_meta( $this->id, 'usage_count', $this->usage_count );
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if ( $used_by ) {
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add_post_meta( $this->id, '_used_by', strtolower( $used_by ) );
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}
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}
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/**
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* Decrease usage count fo current coupon.
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*
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* @access public
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* @param string $used_by Either user ID or billing email
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* @return void
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*/
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public function dcr_usage_count( $used_by = '' ) {
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global $wpdb;
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$this->usage_count--;
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update_post_meta( $this->id, 'usage_count', $this->usage_count );
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// Delete 1 used by meta
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$meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_used_by' AND meta_value = %s AND post_id = %d LIMIT 1;", $used_by, $this->id ) );
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if ( $meta_id ) {
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delete_metadata_by_mid( 'post', $meta_id );
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}
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}
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/**
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* Returns the error_message string
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*
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* @access public
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* @return string
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*/
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public function get_error_message() {
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return $this->error_message;
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}
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/**
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* is_valid function.
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*
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* Check if a coupon is valid. Return a reason code if invalid. Reason codes:
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*
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* @access public
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* @return bool|WP_Error validity or a WP_Error if not valid
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*/
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public function is_valid() {
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$error_code = null;
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$valid = true;
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$error = false;
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if ( $this->id ) {
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// Usage Limit
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if ( $this->usage_limit > 0 ) {
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if ( $this->usage_count >= $this->usage_limit ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_USAGE_LIMIT_REACHED;
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}
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}
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// Per user usage limit - check here if user is logged in (against user IDs)
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// Checked again for emails later on in WC_Cart::check_customer_coupons()
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if ( $this->usage_limit_per_user > 0 && is_user_logged_in() ) {
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$used_by = (array) get_post_meta( $this->id, '_used_by' );
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$usage_count = sizeof( array_keys( $used_by, get_current_user_id() ) );
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if ( $usage_count >= $this->usage_limit_per_user ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_USAGE_LIMIT_REACHED;
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}
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}
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// Expired
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if ( $this->expiry_date ) {
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if ( current_time( 'timestamp' ) > $this->expiry_date ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_EXPIRED;
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}
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}
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// Minimum spend
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if ( $this->minimum_amount > 0 ) {
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if ( $this->minimum_amount > WC()->cart->subtotal ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_MIN_SPEND_LIMIT_NOT_MET;
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}
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}
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// Product ids - If a product included is found in the cart then its valid
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if ( sizeof( $this->product_ids ) > 0 ) {
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$valid_for_cart = false;
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if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
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foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
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if ( in_array( $cart_item['product_id'], $this->product_ids ) || in_array( $cart_item['variation_id'], $this->product_ids ) || in_array( $cart_item['data']->get_parent(), $this->product_ids ) )
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$valid_for_cart = true;
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}
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}
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if ( ! $valid_for_cart ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_NOT_APPLICABLE;
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}
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}
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// Category ids - If a product included is found in the cart then its valid
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if ( sizeof( $this->product_categories ) > 0 ) {
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$valid_for_cart = false;
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if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
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foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
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$product_cats = wp_get_post_terms($cart_item['product_id'], 'product_cat', array("fields" => "ids"));
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if ( sizeof( array_intersect( $product_cats, $this->product_categories ) ) > 0 )
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$valid_for_cart = true;
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}
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}
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if ( ! $valid_for_cart ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_NOT_APPLICABLE;
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}
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}
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// Cart discounts cannot be added if non-eligble product is found in cart
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if ( $this->type != 'fixed_product' && $this->type != 'percent_product' ) {
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// Exclude Products
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if ( sizeof( $this->exclude_product_ids ) > 0 ) {
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$valid_for_cart = true;
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if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
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foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
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if ( in_array( $cart_item['product_id'], $this->exclude_product_ids ) || in_array( $cart_item['variation_id'], $this->exclude_product_ids ) || in_array( $cart_item['data']->get_parent(), $this->exclude_product_ids ) ) {
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$valid_for_cart = false;
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}
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}
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}
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if ( ! $valid_for_cart ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_NOT_APPLICABLE;
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}
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}
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// Exclude Sale Items
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if ( $this->exclude_sale_items == 'yes' ) {
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$valid_for_cart = true;
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$product_ids_on_sale = wc_get_product_ids_on_sale();
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if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
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foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
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if ( in_array( $cart_item['product_id'], $product_ids_on_sale, true ) || in_array( $cart_item['variation_id'], $product_ids_on_sale, true ) || in_array( $cart_item['data']->get_parent(), $product_ids_on_sale, true ) ) {
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$valid_for_cart = false;
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}
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}
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}
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if ( ! $valid_for_cart ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_NOT_VALID_SALE_ITEMS;
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}
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}
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// Exclude Categories
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if ( sizeof( $this->exclude_product_categories ) > 0 ) {
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$valid_for_cart = true;
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if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
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foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
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$product_cats = wp_get_post_terms( $cart_item['product_id'], 'product_cat', array( "fields" => "ids" ) );
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if ( sizeof( array_intersect( $product_cats, $this->exclude_product_categories ) ) > 0 )
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$valid_for_cart = false;
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}
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}
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if ( ! $valid_for_cart ) {
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$valid = false;
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$error_code = self::E_WC_COUPON_NOT_APPLICABLE;
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}
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}
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}
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$valid = apply_filters( 'woocommerce_coupon_is_valid', $valid, $this );
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if ( $valid ) {
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return true;
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} else {
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if ( is_null( $error_code ) )
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$error_code = self::E_WC_COUPON_INVALID_FILTERED;
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}
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} else {
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$error_code = self::E_WC_COUPON_NOT_EXIST;
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}
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if ( $error_code )
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$this->error_message = $this->get_coupon_error( $error_code );
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return false;
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}
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/**
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* Check if a coupon is valid
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*
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* @return bool
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*/
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public function is_valid_for_cart() {
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if ( $this->type != 'fixed_cart' && $this->type != 'percent' )
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return false;
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else
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return true;
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}
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/**
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* Check if a coupon is valid for a product
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*
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* @param WC_Product $product
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* @return boolean
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*/
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public function is_valid_for_product( $product ) {
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if ( $this->type != 'fixed_product' && $this->type != 'percent_product' )
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return false;
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$valid = false;
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$product_cats = wp_get_post_terms( $product->id, 'product_cat', array( "fields" => "ids" ) );
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// Specific products get the discount
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if ( sizeof( $this->product_ids ) > 0 ) {
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if ( in_array( $product->id, $this->product_ids ) || ( isset( $product->variation_id ) && in_array( $product->variation_id, $this->product_ids ) ) || in_array( $product->get_parent(), $this->product_ids ) )
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$valid = true;
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// Category discounts
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} elseif ( sizeof( $this->product_categories ) > 0 ) {
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if ( sizeof( array_intersect( $product_cats, $this->product_categories ) ) > 0 )
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$valid = true;
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} else {
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// No product ids - all items discounted
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$valid = true;
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}
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// Specific product ID's excluded from the discount
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if ( sizeof( $this->exclude_product_ids ) > 0 )
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if ( in_array( $product->id, $this->exclude_product_ids ) || ( isset( $product->variation_id ) && in_array( $product->variation_id, $this->exclude_product_ids ) ) || in_array( $product->get_parent(), $this->exclude_product_ids ) )
|
|
$valid = false;
|
|
|
|
// Specific categories excluded from the discount
|
|
if ( sizeof( $this->exclude_product_categories ) > 0 )
|
|
if ( sizeof( array_intersect( $product_cats, $this->exclude_product_categories ) ) > 0 )
|
|
$valid = false;
|
|
|
|
// Sale Items excluded from discount
|
|
if ( $this->exclude_sale_items == 'yes' ) {
|
|
$product_ids_on_sale = wc_get_product_ids_on_sale();
|
|
|
|
if ( in_array( $product->id, $product_ids_on_sale, true ) || ( isset( $product->variation_id ) && in_array( $product->variation_id, $product_ids_on_sale, true ) ) || in_array( $product->get_parent(), $product_ids_on_sale, true ) )
|
|
$valid = false;
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_coupon_is_valid_for_product', $valid, $product, $this );
|
|
}
|
|
|
|
/**
|
|
* Get discount amount for a cart item
|
|
*
|
|
* @param float $discounting_amount Amount the coupon is being applied to
|
|
* @param array|null $cart_item Cart item being discounted if applicable
|
|
* @param boolean $single True if discounting a single qty item, false if its the line
|
|
* @return float Amount this coupon has discounted
|
|
*/
|
|
public function get_discount_amount( $discounting_amount, $cart_item = null, $single = false ) {
|
|
$discount = 0;
|
|
|
|
if ( $this->type == 'fixed_product') {
|
|
|
|
$discount = $discounting_amount < $this->amount ? $discounting_amount : $this->amount;
|
|
|
|
// If dealing with a line and not a single item, we need to multiple fixed discount by cart item qty.
|
|
if ( ! $single && ! is_null( $cart_item ) ) {
|
|
// Discount for the line.
|
|
$discount = $discount * $cart_item['quantity'];
|
|
}
|
|
|
|
} elseif ( $this->type == 'percent_product' || $this->type == 'percent' ) {
|
|
|
|
$discount = round( ( $discounting_amount / 100 ) * $this->amount, WC()->cart->dp );
|
|
|
|
} elseif ( $this->type == 'fixed_cart' ) {
|
|
if ( ! is_null( $cart_item ) ) {
|
|
/**
|
|
* This is the most complex discount - we need to divide the discount between rows based on their price in
|
|
* proportion to the subtotal. This is so rows with different tax rates get a fair discount, and so rows
|
|
* with no price (free) don't get discounted.
|
|
*
|
|
* Get item discount by dividing item cost by subtotal to get a %
|
|
*/
|
|
$discount_percent = 0;
|
|
|
|
if ( WC()->cart->subtotal_ex_tax ) {
|
|
$discount_percent = ( $cart_item['data']->get_price_excluding_tax() * $cart_item['quantity'] ) / WC()->cart->subtotal_ex_tax;
|
|
}
|
|
|
|
$discount = min( ( $this->amount * $discount_percent ) / $cart_item['quantity'], $discounting_amount );
|
|
} else {
|
|
$discount = min( $this->amount, $discounting_amount );
|
|
}
|
|
}
|
|
|
|
// Handle the limit_usage_to_x_items option
|
|
if ( in_array( $this->type, array( 'percent_product', 'fixed_product' ) ) && ! is_null( $cart_item ) ) {
|
|
$qty = empty( $this->limit_usage_to_x_items ) ? $cart_item['quantity'] : min( $this->limit_usage_to_x_items, $cart_item['quantity'] );
|
|
|
|
if ( $single ) {
|
|
$discount = ( $discount * $qty ) / $cart_item['quantity'];
|
|
} else {
|
|
$discount = ( $discount / $cart_item['quantity'] ) * $qty;
|
|
}
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_coupon_get_discount_amount', $discount, $discounting_amount, $cart_item, $single, $this );
|
|
}
|
|
|
|
/**
|
|
* Converts one of the WC_Coupon message/error codes to a message string and
|
|
* displays the message/error.
|
|
*
|
|
* @access public
|
|
* @param int $msg_code Message/error code.
|
|
* @return void
|
|
*/
|
|
public function add_coupon_message( $msg_code ) {
|
|
|
|
if ( $msg_code < 200 )
|
|
wc_add_notice( $this->get_coupon_error( $msg_code ), 'error' );
|
|
else
|
|
wc_add_notice( $this->get_coupon_message( $msg_code ) );
|
|
}
|
|
|
|
/**
|
|
* Map one of the WC_Coupon message codes to a message string
|
|
*
|
|
* @access public
|
|
* @param mixed $msg_code
|
|
* @return string| Message/error string
|
|
*/
|
|
public function get_coupon_message( $msg_code ) {
|
|
|
|
switch ( $msg_code ) {
|
|
case self::WC_COUPON_SUCCESS :
|
|
$msg = __( 'Coupon code applied successfully.', 'woocommerce' );
|
|
break;
|
|
case self::WC_COUPON_REMOVED :
|
|
$msg = __( 'Coupon code removed successfully.', 'woocommerce' );
|
|
break;
|
|
default:
|
|
$msg = '';
|
|
break;
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_coupon_message', $msg, $msg_code, $this );
|
|
}
|
|
|
|
/**
|
|
* Map one of the WC_Coupon error codes to a message string
|
|
*
|
|
* @access public
|
|
* @param int $err_code Message/error code.
|
|
* @return string| Message/error string
|
|
*/
|
|
public function get_coupon_error( $err_code ) {
|
|
|
|
switch ( $err_code ) {
|
|
case self::E_WC_COUPON_INVALID_FILTERED:
|
|
$err = __( 'Coupon is not valid.', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_NOT_EXIST:
|
|
$err = __( 'Coupon does not exist!', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_INVALID_REMOVED:
|
|
$err = sprintf( __( 'Sorry, it seems the coupon "%s" is invalid - it has now been removed from your order.', 'woocommerce' ), $this->code );
|
|
break;
|
|
case self::E_WC_COUPON_NOT_YOURS_REMOVED:
|
|
$err = sprintf( __( 'Sorry, it seems the coupon "%s" is not yours - it has now been removed from your order.', 'woocommerce' ), $this->code );
|
|
break;
|
|
case self::E_WC_COUPON_ALREADY_APPLIED:
|
|
$err = __( 'Coupon code already applied!', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_ALREADY_APPLIED_INDIV_USE_ONLY:
|
|
$err = sprintf( __( 'Sorry, coupon "%s" has already been applied and cannot be used in conjunction with other coupons.', 'woocommerce' ), $this->code );
|
|
break;
|
|
case self::E_WC_COUPON_USAGE_LIMIT_REACHED:
|
|
$err = __( 'Coupon usage limit has been reached.', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_EXPIRED:
|
|
$err = __( 'This coupon has expired.', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_MIN_SPEND_LIMIT_NOT_MET:
|
|
$err = sprintf( __( 'The minimum spend for this coupon is %s.', 'woocommerce' ), wc_price( $this->minimum_amount ) );
|
|
break;
|
|
case self::E_WC_COUPON_NOT_APPLICABLE:
|
|
$err = __( 'Sorry, this coupon is not applicable to your cart contents.', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_NOT_VALID_SALE_ITEMS:
|
|
$err = __( 'Sorry, this coupon is not valid for sale items.', 'woocommerce' );
|
|
break;
|
|
default:
|
|
$err = '';
|
|
break;
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_coupon_error', $err, $err_code, $this );
|
|
}
|
|
|
|
/**
|
|
* Map one of the WC_Coupon error codes to an error string
|
|
* No coupon instance will be available where a coupon does not exist,
|
|
* so this static method exists.
|
|
*
|
|
* @access public
|
|
* @param int $err_code Error code
|
|
* @return string| Error string
|
|
*/
|
|
public static function get_generic_coupon_error( $err_code ) {
|
|
|
|
switch ( $err_code ) {
|
|
case self::E_WC_COUPON_NOT_EXIST:
|
|
$err = __( 'Coupon does not exist!', 'woocommerce' );
|
|
break;
|
|
case self::E_WC_COUPON_PLEASE_ENTER:
|
|
$err = __( 'Please enter a coupon code.', 'woocommerce' );
|
|
break;
|
|
default:
|
|
$err = '';
|
|
break;
|
|
}
|
|
|
|
// When using this static method, there is no $this to pass to filter
|
|
return apply_filters( 'woocommerce_coupon_error', $err, $err_code, null );
|
|
}
|
|
|
|
}
|