/**
* Function to apply discounts to a product and get the discounted price (before tax is applied)
*
* @param mixed $values
* @param mixed $price
* @param bool $add_totals (default: false)
* @return float price
* @since 1.0
*/
public static function get_discounted_price($values, $price, $add_totals = false)
{
global $woocommerce;
if (!$price) {
return $price;
}
if (!empty($woocommerce->cart->applied_coupons)) {
foreach ($woocommerce->cart->applied_coupons as $code) {
$coupon = new WC_Coupon($code);
if ($coupon->apply_before_tax() && $coupon->is_valid()) {
switch ($coupon->type) {
case "fixed_product":
case "percent_product":
$this_item_is_discounted = false;
$product_cats = wp_get_post_terms($values['product_id'], 'product_cat', array("fields" => "ids"));
// Specific products get the discount
if (sizeof($coupon->product_ids) > 0) {
if (in_array($values['product_id'], $coupon->product_ids) || in_array($values['variation_id'], $coupon->product_ids) || in_array($values['data']->get_parent(), $coupon->product_ids)) {
$this_item_is_discounted = true;
}
// Category discounts
} elseif (sizeof($coupon->product_categories) > 0) {
if (sizeof(array_intersect($product_cats, $coupon->product_categories)) > 0) {
$this_item_is_discounted = true;
}
} else {
// No product ids - all items discounted
$this_item_is_discounted = true;
}
// Specific product ID's excluded from the discount
if (sizeof($coupon->exclude_product_ids) > 0) {
if (in_array($values['product_id'], $coupon->exclude_product_ids) || in_array($values['variation_id'], $coupon->exclude_product_ids) || in_array($values['data']->get_parent(), $coupon->exclude_product_ids)) {
$this_item_is_discounted = false;
}
}
// Specific categories excluded from the discount
if (sizeof($coupon->exclude_product_categories) > 0) {
if (sizeof(array_intersect($product_cats, $coupon->exclude_product_categories)) > 0) {
$this_item_is_discounted = false;
}
}
// Apply filter
$this_item_is_discounted = apply_filters('woocommerce_item_is_discounted', $this_item_is_discounted, $values, $before_tax = true);
// Apply the discount
if ($this_item_is_discounted) {
if ($coupon->type == 'fixed_product') {
if ($price < $coupon->amount) {
$discount_amount = $price;
} else {
$discount_amount = $coupon->amount;
}
$price = $price - $coupon->amount;
if ($price < 0) {
$price = 0;
}
if ($add_totals) {
$woocommerce->cart->sign_up_fee_discount_cart = $woocommerce->cart->sign_up_fee_discount_cart + $discount_amount * $values['quantity'];
}
} elseif ($coupon->type == 'percent_product') {
$percent_discount = WC_Subscriptions_Product::get_sign_up_fee_excluding_tax($values['data']) / 100 * $coupon->amount;
if ($add_totals) {
$woocommerce->cart->sign_up_fee_discount_cart = $woocommerce->cart->sign_up_fee_discount_cart + $percent_discount * $values['quantity'];
}
$price = $price - $percent_discount;
}
}
break;
case "fixed_cart":
/**
* This is the most complex discount - we need to divide the discount between rows based on their price in
* proportion to the subtotal. This is so rows with different tax rates get a fair discount, and so rows
* with no price (free) don't get discount too.
*/
// Get item discount by dividing item cost by subtotal to get a %
if ($woocommerce->cart->sign_up_fee_subtotal_ex_tax) {
$discount_percent = WC_Subscriptions_Product::get_sign_up_fee_excluding_tax($values['data']) * $values['quantity'] / $woocommerce->cart->sign_up_fee_subtotal_ex_tax;
} else {
$discount_percent = 0;
}
// Use pence to help prevent rounding errors
$coupon_amount_pence = $coupon->amount * 100;
// Work out the discount for the row
$item_discount = $coupon_amount_pence * $discount_percent;
// Work out discount per item
$item_discount = $item_discount / $values['quantity'];
// Pence
$price = $price * 100;
// Check if discount is more than price
if ($price < $item_discount) {
$discount_amount = $price;
} else {
$discount_amount = $item_discount;
}
// Take discount off of price (in pence)
$price = $price - $discount_amount;
// Back to pounds
$price = $price / 100;
// Cannot be below 0
if ($price < 0) {
$price = 0;
}
// Add coupon to discount total (once, since this is a fixed cart discount and we don't want rounding issues)
if ($add_totals) {
$woocommerce->cart->sign_up_fee_discount_cart = $woocommerce->cart->sign_up_fee_discount_cart + $discount_amount * $values['quantity'] / 100;
}
break;
case "percent":
$percent_discount = WC_Subscriptions_Product::get_sign_up_fee($values['data']->id) / 100 * $coupon->amount;
if ($add_totals) {
$woocommerce->cart->sign_up_fee_discount_cart = $woocommerce->cart->sign_up_fee_discount_cart + $percent_discount * $values['quantity'];
}
$price = $price - $percent_discount;
break;
}
}
}
}
return $price;
}
