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Editing: Cart.php

<?php

namespace App\Models;

use App\Mixins\Cart\CartItemInfo;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Collection;

class Cart extends Model
{
    protected $table = "cart";

public $timestamps = false;

protected $guarded = ['id'];

public function user()
    {
        return $this->belongsTo('App\User', 'creator_id', 'id');
    }

public function webinar()
    {
        return $this->belongsTo('App\Models\Webinar', 'webinar_id', 'id');
    }

public function bundle()
    {
        return $this->belongsTo('App\Models\Bundle', 'bundle_id', 'id');
    }

public function reserveMeeting()
    {
        return $this->belongsTo('App\Models\ReserveMeeting', 'reserve_meeting_id', 'id');
    }

public function ticket()
    {
        return $this->belongsTo('App\Models\Ticket', 'ticket_id', 'id');
    }

public function productOrder()
    {
        return $this->belongsTo('App\Models\ProductOrder', 'product_order_id', 'id');
    }

public function subscribe()
    {
        return $this->belongsTo('App\Models\Subscribe', 'subscribe_id', 'id');
    }

public function promotion()
    {
        return $this->belongsTo('App\Models\Promotion', 'promotion_id', 'id');
    }

public function installmentPayment()
    {
        return $this->belongsTo(InstallmentOrderPayment::class, 'installment_payment_id', 'id');
    }

public function gift()
    {
        return $this->belongsTo(Gift::class, 'gift_id', 'id');
    }

public static function emptyCart($userId)
    {
        Cart::where('creator_id', $userId)->delete();
    }

public static function getCartsTotalPrice($carts)
    {
        $totalPrice = 0;

if (!empty($carts) and count($carts)) {
            foreach ($carts as $cart) {
                $totalPrice += self::getItemPrice($cart);
            }
        }

return $totalPrice;
    }

public static function getItemPrice($cart)
    {
        $price = 0;

if ((!empty($cart->ticket_id) or !empty($cart->special_offer_id)) and !empty($cart->webinar)) {
            $price += $cart->webinar->price - $cart->webinar->getDiscount($cart->ticket);
        } else if (!empty($cart->webinar_id) and !empty($cart->webinar)) {
            $price += $cart->webinar->price;
        } else if (!empty($cart->bundle_id) and !empty($cart->bundle)) {
            $price += $cart->bundle->price;
        } else if (!empty($cart->reserve_meeting_id) and !empty($cart->reserveMeeting)) {
            $price += $cart->reserveMeeting->paid_amount;
        } else if (!empty($cart->product_order_id) and !empty($cart->productOrder) and !empty($cart->productOrder->product)) {
            $product = $cart->productOrder->product;

$price += (($product->price * $cart->productOrder->quantity) - $product->getDiscountPrice());
        }

return $price;
    }

public function getItemInfo()
    {
        if (empty($this->itemInfo)) {
            $cartItemInfo = new CartItemInfo();

$this->itemInfo = $cartItemInfo->getItemInfo($this);
        }

return $this->itemInfo;
    }
}

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