Laravel Filtered JsonResource

FilteredJsonResource.php

<?php

namespace App\Resources;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\Resources\Json\JsonResource;

class FilteredJsonResource extends JsonResource
{
    public static function collection($resource)
    {
        static::applyFilter($resource);
        static::applySorting($resource);

        return parent::collection($resource->paginate());
    }

    /**
     * Filter QueryBuilder.
     */
    private static function applyFilter(Builder $builder): void
    {
        $filter = request()?->query('filter');
        if (! $filter) {
            return;
        }

        // İnit Filter
        $current = array_intersect_key(static::toFilter(), $filter);
        foreach ($current as $columnId => $config) {
            if (! isset($config['filter'])) {
                continue;
            }

            // Single
            if (! is_array($config['filter'])) {
                $config['filter']($builder, $filter[$columnId]);

                continue;
            }

            // Multiple
            foreach ($config['filter'] as $subColumnId => $subConfig) {
                if (isset($filter[$columnId][$subColumnId])) {
                    $subConfig($builder, $filter[$columnId][$subColumnId]);
                }
            }
        }
    }

    /**
     * Sort Query Builder.
     *
     * sort=ASC
     * sort-by=id
     */
    private static function applySorting(Builder $builder): void
    {
        $sortBy = request()?->query('sort_by');
        $toFilter = static::toFilter()[$sortBy ?? 'id'];
        if (! $sortBy || empty($toFilter['sortable'])) {
            return;
        }

        // Generate Direction
        $direction = match (strtolower(request()->query->get('sort', ''))) {
            'asc' => 'asc',
            default => 'desc'
        };

        if (is_callable($toFilter['sortable_field'] ?? '')) {
            $toFilter['sortable_field']($builder, $direction);

            return;
        }

        $builder->orderBy($sortBy, $direction);
    }
}