MarketsCrawler.php

<?php

namespace App\Crawlers;

use OTPHP\TOTP;
use App\Models\Item;

class MarketsCrawler extends AbstractCrawler
{
    /**
     * The list of supported apps.
     *
     * @var array
     */
    protected $apps = [
        578080, 730,
    ];

    /**
     * Update prices and quantities.
     *
     * @param null $apps
     */
    public function load($apps = null)
    {
        if (is_null($apps)) {
            $apps = $this->apps;
        }

        if (is_string($apps)) {
            $apps = [$apps];
        }

        foreach ($apps as $app)
        {
            $items = Item::where('app', $app)
                ->get();

            $opskins = $this->tryGet('https://api.opskins.com/IPricing/GetAllLowestListPrices/v1/', [
                'appid' => $app,
            ])->response;

            $bitskins = $this->tryGet('https://bitskins.com/api/v1/get_price_data_for_items_on_sale/', [
                'app_id'  => $app,
                'api_key' => env('BITSKINS_KEY'),
                'code'    => $this->generateBitskinsCode(),
            ])->data->items;

            foreach ($items as $item)
            {
                $ops = isset($opskins->{$item->title}) ? $opskins->{$item->title} : false;

                $bit = array_first($bitskins, function ($filter) use ($item) {
                    return $filter->market_hash_name === $item->title;
                }, false);


                $data = [
                    'prices' => [
                        'opskins'  => $ops ? $ops->price : null,
                        'bitskins' => $bit && $bit->total_items > 0 ? intval($bit->lowest_price * 100) : null,
                    ],

                    'quantities' => [
                        'opskins'  => $ops ? $ops->quantity : 0,
                        'bitskins' => $bit ? $bit->total_items : 0,
                    ],
                ];

                $data['price'] = $this->choosePrice($data['prices'], $data['quantities']);

                $item->update($data);
            }
        }
    }

    /**
     * Choose lowest obtainable price.
     *
     * @param $prices
     * @param $quantities
     *
     * @return null|int
     */
    protected function choosePrice($prices, $quantities)
    {
        $min = null;

        foreach ($prices as $provider => $price)
        {
            if (is_null($min) || $price < $min)
            {
                if ($quantities[$provider] > 0) {
                    $min = $price;
                }
            }
        }

        return $min ? intval($min * .95) : null;
    }

    /**
     * Generate TOTP for Bitskins.com
     *
     * @return string
     */
    protected function generateBitskinsCode()
    {
        return TOTP::create(env('BITSKINS_OTP'))->now();
    }
}