<?php 
public function serverProcessing() {
    return datatables()->collection($this->getRows())->toJson();
}

public function getRows() {
    $rows = [];
    foreach(Storefronts::all() as $storefront) {
        if($storefront->client->monitored) {
            $rows[] = [
                mb_strtoupper($storefront->client->environment),
                $storefront->client->client_display_name,
                $storefront->country->name.' ('.mb_strtoupper($storefront->country->code).')',
                $storefront->client->client_id,
                $storefront->token ? 'OK' : 'KO',
                $storefront->webshop ? 'OK' : 'KO',
                $storefront->products ? 'OK' : 'KO',          
                $storefront->total_products,
                Carbon::createFromFormat('Y-m-d H:i:s', Carbon::parse($storefront->last_checked))->format('d/m/Y H:i').'<br>('.Carbon::parse($storefront->last_checked)->diffForHumans().')',
                Carbon::createFromFormat('Y-m-d H:i:s', $storefront->updated_at)->format('d/m/Y H:i').'<br>('.$storefront->updated_at->diffForHumans().')', $storefront->error,
                is_null($storefront->error_date) ? null : Carbon::createFromFormat('Y-m-d H:i:s', Carbon::parse($storefront->error_date))->format('d/m/Y H:i').'<br>('.Carbon::parse($storefront->error_date)->diffForHumans().')',
            ];
        }
    }
    return $rows;
}