/**
* Returns the maximum possible discount available given the total amount of points the customer has
*
* @since 1.0
*/
public static function get_discount_for_redeeming_points($applying = false)
{
global $woocommerce;
// get the value of the user's point balance
$available_user_discount = WC_Points_Rewards_Manager::get_users_points_value(get_current_user_id());
// no discount
if ($available_user_discount <= 0) {
return 0;
}
if ($applying && 'yes' === get_option('wc_points_rewards_partial_redemption_enabled') && !empty($woocommerce->session->wc_points_rewards_discount_amount)) {
$requested_user_discount = WC_Points_Rewards_Manager::calculate_points_value($woocommerce->session->wc_points_rewards_discount_amount);
if ($requested_user_discount > 0 && $requested_user_discount < $available_user_discount) {
$available_user_discount = $requested_user_discount;
}
}
$discount_applied = 0;
if (!did_action('woocommerce_before_calculate_totals')) {
$woocommerce->cart->calculate_totals();
}
// calculate the discount to be applied by iterating through each item in the cart and calculating the individual
// maximum discount available
foreach ($woocommerce->cart->get_cart() as $item_key => $item) {
$discount = 0;
$max_discount = WC_Points_Rewards_Product::get_maximum_points_discount_for_product($item['data']);
if (is_numeric($max_discount)) {
// adjust the max discount by the quantity being ordered
$max_discount *= $item['quantity'];
// if the discount available is greater than the max discount, apply the max discount
$discount = $available_user_discount <= $max_discount ? $available_user_discount : $max_discount;
// Max should be product price. As this will be applied before tax, it will respect other coupons.
} else {
// Use the line price - this is the max we can apply here
if (method_exists($item['data'], 'get_price_including_tax')) {
$max_discount = $item['data']->get_price_including_tax($item['quantity']);
} else {
$max_discount = $item['data']->get_price() * $item['quantity'];
}
// if the discount available is greater than the max discount, apply the max discount
$discount = $available_user_discount <= $max_discount ? $available_user_discount : $max_discount;
}
// add the discount to the amount to be applied
$discount_applied += $discount;
// reduce the remaining discount available to be applied
$available_user_discount -= $discount;
}
// if the available discount is greater than the order total, make the discount equal to the order total less any other discounts
if (get_option('woocommerce_prices_include_tax') == 'no') {
$discount_applied = max(0, min($discount_applied, $woocommerce->cart->subtotal_ex_tax - $woocommerce->cart->discount_total));
} else {
$discount_applied = max(0, min($discount_applied, $woocommerce->cart->subtotal - $woocommerce->cart->discount_total));
}
// limit the discount available by the global maximum discount if set
$max_discount = get_option('wc_points_rewards_cart_max_discount');
if ($max_discount && $max_discount < $discount_applied) {
$discount_applied = $max_discount;
}
return $discount_applied;
}
