/**
* Get the total of all cart tax discounts (used for discounts on tax inclusive prices).
*
* @return float
*/
public function get_cart_discount_tax_total()
{
return wc_cart_round_discount($this->discount_cart_tax, $this->dp);
}
/**
* 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;
$cart_item_qty = is_null($cart_item) ? 1 : $cart_item['quantity'];
if ($this->is_type(array('percent_product', 'percent'))) {
$discount = $this->coupon_amount * ($discounting_amount / 100);
} elseif ($this->is_type('fixed_cart') && !is_null($cart_item) && WC()->cart->subtotal_ex_tax) {
/**
* 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 %.
*
* Uses price inc tax if prices include tax to work around https://github.com/woothemes/woocommerce/issues/7669 and https://github.com/woothemes/woocommerce/issues/8074.
*/
if (wc_prices_include_tax()) {
$discount_percent = $cart_item['data']->get_price_including_tax() * $cart_item_qty / WC()->cart->subtotal;
} else {
$discount_percent = $cart_item['data']->get_price_excluding_tax() * $cart_item_qty / WC()->cart->subtotal_ex_tax;
}
$discount = $this->coupon_amount * $discount_percent / $cart_item_qty;
} elseif ($this->is_type('fixed_product')) {
$discount = min($this->coupon_amount, $discounting_amount);
$discount = $single ? $discount : $discount * $cart_item_qty;
}
$discount = min($discount, $discounting_amount);
// Handle the limit_usage_to_x_items option
if ($this->is_type(array('percent_product', 'fixed_product'))) {
if ($discounting_amount) {
if ('' === $this->limit_usage_to_x_items) {
$limit_usage_qty = $cart_item_qty;
} else {
$limit_usage_qty = min($this->limit_usage_to_x_items, $cart_item_qty);
$this->limit_usage_to_x_items = max(0, $this->limit_usage_to_x_items - $limit_usage_qty);
}
if ($single) {
$discount = $discount * $limit_usage_qty / $cart_item_qty;
} else {
$discount = $discount / $cart_item_qty * $limit_usage_qty;
}
}
}
$discount = wc_cart_round_discount($discount, WC_ROUNDING_PRECISION);
return apply_filters('woocommerce_coupon_get_discount_amount', $discount, $discounting_amount, $cart_item, $single, $this);
}
