UNIT3D-Community-Edition/app/Http/Requests/StoreTransactionRequest.php

<?php
/**
 * NOTICE OF LICENSE.
 *
 * UNIT3D Community Edition is open-sourced software licensed under the GNU Affero General Public License v3.0
 * The details is bundled with this project in the file LICENSE.txt.
 *
 * @project    UNIT3D Community Edition
 *
 * @author     Roardom <roardom@protonmail.com>
 * @license    https://www.gnu.org/licenses/agpl-3.0.en.html/ GNU Affero General Public License v3.0
 */

namespace App\Http\Requests;

use App\Models\BonExchange;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Http\Request;

/**
 * @see \Tests\Todo\Unit\Http\Requests\StorePollTest
 */
class StoreTransactionRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(Request $request): array
    {
        return [
            'exchange'   => [
                'bail',
                'required',
                'exists:bon_exchange,id',
                function ($attribute, $value, $fail) use ($request) {
                    $user = $request->user();
                    $item = BonExchange::findOrFail($value);

                    switch (true) {
                        case $item->cost > $user->seedbonus:
                            $fail('Not enough BON.');
                            break;
                        case $item->download && $user->downloaded < $item->value:
                            $fail('Not enough download.');
                            break;
                        case $item->personal_freeleech && $user->personalFreeleeches()->exists():
                            $fail('Your previous personal freeleech is still active.');
                            break;
                    }
                },
            ],
        ];
    }
}