Symfony 4 Pagination Service

_pagination.html.twig

{% set _currentPage = app.request.query.get('p') ?: 1 %}
{% set _currentRoute = app.request.attributes.get('_route') %}
{% set _currentParams = app.request.query.all %}
{% if lastPage > 1 %}
    <nav>
        <ul class="pagination">
            <li class="page-item{% if _currentPage == 1 %} disabled{% endif %}"><a class="page-link" href="{{ path(_currentRoute, _currentParams|merge({p: 1})) }}" data-toggle="tooltip" data-placement="bottom" title="{% trans %}First{% endtrans %}">&laquo;</a></li>
            <li class="page-item{% if _currentPage == 1 %} disabled{% endif %}"><a class="page-link" href="{{ path(_currentRoute, _currentParams|merge({p: _currentPage - 1})) }}" data-toggle="tooltip" data-placement="bottom" title="{% trans %}Previous{% endtrans %}">&lsaquo;</a></li>

              {% set f = 1 %}
              {% if _currentPage > 5 %}
                {% set f = _currentPage - 5 %}
              {% endif %}

              {% set l = lastPage %}
              {% if lastPage - _currentPage > 5 %}
                {% set l = _currentPage + 5 %}
              {% endif %}

            {% for i in f..l %}
                <li class="page-item {% if i == _currentPage %}active{% endif %}">
                    <a class="page-link" href="{{ path(_currentRoute, _currentParams|merge({p: i})) }}">{{ i }}</a>
                </li>
            {% endfor %}

            <li class="page-item{% if _currentPage == lastPage %} disabled{% endif %}"><a class="page-link" href="{{ path(_currentRoute, _currentParams|merge({p: _currentPage + 1})) }}" data-toggle="tooltip" data-placement="bottom" title="{% trans %}Next{% endtrans %}">&rsaquo;</a></li>
            <li class="page-item{% if _currentPage == lastPage %} disabled{% endif %}"><a class="page-link" href="{{ path(_currentRoute, _currentParams|merge({p: lastPage})) }}" data-toggle="tooltip" data-placement="bottom" title="{% trans %}Last{% endtrans %}">&raquo;</a></li>
        </ul>
    </nav>
{% endif %}

DemoController.php

<?php

namespace App\Controller;

use App\Entity\Demo;
use App\Service\PaginationService;
use Symfony\Component\HttpFoundation\Request;

class DemoController extends AdminController
{
    const ITEMS_PER_PAGE = 50;


    public function index(Request $request, PaginationService $pagination)
    {
        $entityManager = $this->getDoctrine()->getManager();
        $query   = $entityManager->getRepository(Demo::class)->createQueryBuilder('a')->getQuery();
        $results = $pagination->paginate($query, $request, self::ITEMS_PER_PAGE);

        return $this->render('admin/school/index.html.twig', [
            'schools' => $results,
            'lastPage' => $pagination->lastPage($results)
        ]);
    }
}

PaginationService.php

<?php

namespace App\Service;

use Doctrine\ORM\Query;
use Doctrine\ORM\QueryBuilder;
use Doctrine\ORM\Tools\Pagination\Paginator;
use Symfony\Component\HttpFoundation\Request;

class PaginationService
{
    /**
     * @param QueryBuilder|Query $query
     * @param Request $request
     * @param int $limit
     * @return Paginator
     */
    public function paginate($query, Request $request, int $limit): Paginator
    {
        $currentPage = $request->query->getInt('p') ?: 1;
        $paginator = new Paginator($query);
        $paginator
            ->getQuery()
            ->setFirstResult($limit * ($currentPage - 1))
            ->setMaxResults($limit);

        return $paginator;
    }

    /**
     * @param Paginator $paginator
     * @return int
     */
    public function lastPage(Paginator $paginator): int
    {
        return ceil($paginator->count() / $paginator->getQuery()->getMaxResults());
    }

    /**
     * @param Paginator $paginator
     * @return int
     */
    public function total(Paginator $paginator): int
    {
        return $paginator->count();
    }

    /**
     * @param Paginator $paginator
     * @return bool
     */
    public function currentPageHasNoResult(Paginator $paginator): bool
    {
        return !$paginator->getIterator()->count();
    }
}