TotemFormServiceProvider.php

<?php

namespace Studio\Totem\Providers;

use Illuminate\Support\ServiceProvider;

class TotemFormServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        $this->app['html']->macro('columnSort', function (string $label, string $columnKey, bool $isDefault = false) {
            $icon = '';

            if (request()->has('sort_by')) {
                if (request()->input('sort_by') == $columnKey) {
                    $icon = ' <span class="fa fa-caret-'
                        .(request()->input('sort_direction', 'asc') == 'asc' ? 'up' : 'down')
                        .'"></span>';
                }
            } elseif ($isDefault) {
                $icon = ' <span class="fa fa-caret-'
                    .(request()->input('sort_direction', 'asc') == 'asc' ? 'up' : 'down')
                    .'"></span>';
            }

            $order = 'asc';
            if (request()->has('sort_direction')) {
                $order = (request()->input('sort_direction') == 'desc' ? 'asc' : 'desc');
            } elseif ($isDefault) {
                $order = 'desc';
            }

            $url = request()->fullUrlWithQuery([
                'sort_by'        => $columnKey,
                'sort_direction' => $order,
                'filter'         => request('filter'),
                'limit'          => request('limit'),
            ]);

            return app('html')->toHtmlString(
                '<a href="'
                .$url
                .'">'
                .$label
                .$icon
                .'</a>'
            );
        });
    }
}