/**
* Check if variation or grouped product prices are all equal and return cheapest price
*
* @access public
* @param object $product
* @return array
*/
public static function get_cheapest_child_price($product)
{
$ids = array();
// Grouped product?
if ($product->product_type == 'grouped') {
$children = get_children(array(
'post_parent' => $product->id,
'post_type' => 'product',
));
foreach ($children as $child) {
$ids[] = $child->ID;
}
}
// Variable product
else {
$variations = $product->get_available_variations();
foreach ($variations as $variation) {
$ids[] = $variation['variation_id'];
}
}
if (empty($ids)) {
return array(0, true);
}
$selected_id = null;
$cheapest = null;
$equal = true;
foreach ($ids as $id) {
// We skip non-subscription variations as there is no easy way to compare recurring payments with one-off payments
if (!self::is_subscription($id)) {
$equal = false;
continue;
}
$child_product = new WC_Product($id);
$child_meta = Subscriptio::unwrap_post_meta(get_post_meta($id));
$child_days = Subscriptio_Subscription::get_period_length_in('day', $child_meta['_subscriptio_price_time_unit'], $child_meta['_subscriptio_price_time_value']);
$price_per_day = $child_days == 0 ? 0 : $child_product->get_price() / $child_days;
if ($cheapest === null) {
$selected_id = $id;
$cheapest = $price_per_day;
}
else if ($price_per_day < $cheapest) {
$selected_id = $id;
$cheapest = $price_per_day;
$equal = false;
}
}
return array($selected_id, $equal);
}
