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<?php
namespace App;
class Cart
{
public $items = null;
public $totalQty = 0;
public $totalPrice = 0;
public function __construct($oldCart){
if($oldCart){
$this->items = $oldCart->items;
$this->totalQty = $oldCart->totalQty;
$this->totalPrice = $oldCart->totalPrice;
}
}
public function add($item, $id){
if($item->promotion_price == 0){
$giohang = ['qty'=>0, 'price' => $item->unit_price, 'item' => $item];
}
else{
$giohang = ['qty'=>0, 'price' => $item->promotion_price, 'item' => $item];
}
if($this->items){
if(array_key_exists($id, $this->items)){
$giohang = $this->items[$id];
}
}
$giohang['qty']++;
if($item->promotion_price == 0){
$giohang['price'] = $item->unit_price * $giohang['qty'];
}
else{
$giohang['price'] = $item->promotion_price * $giohang['qty'];
}
$this->items[$id] = $giohang;
$this->totalQty++;
if($item->promotion_price == 0){
$this->totalPrice += $item->unit_price;
}
else{
$this->totalPrice += $item->promotion_price;
}
}
//xóa 1
public function reduceByOne($id){
$this->items[$id]['qty']--;
$this->items[$id]['price'] -= $this->items[$id]['item']['price'];
$this->totalQty--;
$this->totalPrice -= $this->items[$id]['item']['price'];
if($this->items[$id]['qty']<=0){
unset($this->items[$id]);
}
}
//xóa nhiều
public function removeItem($id){
$this->totalQty -= $this->items[$id]['qty'];
$this->totalPrice -= $this->items[$id]['price'];
unset($this->items[$id]);
}
}