app/Models/CartItem.php - master - itp_practice/itp_backend

app/Models/CartItem.php
156 строк3 KB
vivanenko
fix taps and others structure
27 май 2025, 18:06
27 май 2025, 18:068cdc7d9
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\MorphTo;
use Illuminate\Database\Eloquent\Factories\HasFactory;

/**
 * @property int $id
 * @property int $user_id
 * @property int|null $cart_id
 * @property int|null $order_id
 * @property string $sku
 * @property float $price
 * @property float $tax
 * @property float $shipping
 * @property string $currency
 * @property int $quantity
 * @property string $itemable_type
 * @property int $itemable_id
 * @property \DateTime $created_at
 * @property \DateTime $updated_at
 */
class CartItem extends Model
{
    use HasFactory;

    protected $fillable = [
        'user_id',
        'cart_id',
        'order_id',
        'sku',
        'price',
        'tax',
        'shipping',
        'currency',
        'quantity',
        'itemable_type',
        'itemable_id',
    ];

    protected $casts = [
        'user_id' => 'integer',
        'cart_id' => 'integer',
        'order_id' => 'integer',
        'price' => 'decimal:2',
        'tax' => 'decimal:2',
        'shipping' => 'decimal:2',
        'quantity' => 'integer',
        'itemable_id' => 'integer',
    ];

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function cart(): BelongsTo
    {
        return $this->belongsTo(Cart::class);
    }

    public function order(): BelongsTo
    {
        return $this->belongsTo(Order::class);
    }

    public function itemable(): MorphTo
    {
        return $this->morphTo();
    }

    /**
     * Get item subtotal (price * quantity)
     */
    public function getSubtotal(): float
    {
        return $this->price * $this->quantity;
    }

    /**
     * Get item total with tax and shipping
     */
    public function getTotal(): float
    {
        return $this->getSubtotal() + $this->tax + $this->shipping;
    }

    /**
     * Generate SKU for tariff
     */
    public static function generateSku(string $itemableType, int $itemableId): string
    {
        $prefix = match ($itemableType) {
            Tariff::class => 'TARIFF',
            default => 'ITEM',
        };
        
        return sprintf('%s_%d_%s', $prefix, $itemableId, time());
    }

    /**
     * Check if item is for tariff
     */
    public function isTariff(): bool
    {
        return $this->itemable_type === Tariff::class;
    }

    /**
     * Get quantity discount for this item
     */
    public function getQuantityDiscount(): float
    {
        if ($this->quantity >= 5) {
            $freeTariffs = intval($this->quantity / 5);
            return $freeTariffs * $this->price;
        }
        
        return 0.0;
    }

    /**
     * Get effective quantity (paid quantity after discount)
     */
    public function getEffectiveQuantity(): int
    {
        if ($this->quantity >= 5) {
            $freeTariffs = intval($this->quantity / 5);
            return $this->quantity - $freeTariffs;
        }
        
        return $this->quantity;
    }

    /**
     * Get free quantity from discount
     */
    public function getFreeQuantity(): int
    {
        return $this->quantity >= 5 ? intval($this->quantity / 5) : 0;
    }

    /**
     * Move item from cart to order
     */
    public function moveToOrder(int $orderId): bool
    {
        $this->order_id = $orderId;
        $this->cart_id = null;
        
        return $this->save();
    }
}