sfp_api_laravel_ginastica_cerebro/app/Http/Resources/Concerns/SerializesProposalPricing.php

<?php

namespace App\Http\Resources\Concerns;

use Illuminate\Database\Eloquent\Model;

trait SerializesProposalPricing
{
    private function proposalPricingArray(?Model $proposal, bool $withCondition = false): ?array
    {
        if (!$proposal) return null;

        $array = [
            'registration_value'                => $proposal->registration_value,

            'classes_value'                => $proposal->classes_value,
            'classes_discount_percentage'  => $proposal->classes_discount_percentage,

            'materials_total_value'              => $proposal->materials_total_value,

            'total_value'            => $proposal->total_value,
            'total_max_installments' => $proposal->total_max_installments,

            'materials' => $proposal->relationLoaded('products')
                ? $proposal->products->map(fn($item) => [
                    'product_id' => $item->product_id,
                    'name'       => $item->product?->name,
                    'quantity'   => $item->quantity,
                    'price'      => (float) $item->price,
                ])
                : [],
        ];

        if ($withCondition) {
            $array['condition'] = $proposal->condition;
        }

        return $array;
    }
}