Added pagination to ShortUrls list

src/Entity/ShortUrl.php

@@ -10,7 +10,7 @@ use Doctrine\ORM\Mapping as ORM;
  * @author
  * @link
  *
- * @ORM\Entity
+ * @ORM\Entity(repositoryClass="Acelaya\UrlShortener\Repository\ShortUrlRepository")
  * @ORM\Table(name="short_urls")
  */
 class ShortUrl extends AbstractEntity implements \JsonSerializable

src/Middleware/Rest/ListShortcodesMiddleware.php

@@ -8,6 +8,7 @@ use Acelaya\ZsmAnnotatedServices\Annotation\Inject;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Zend\Diactoros\Response\JsonResponse;
+use Zend\Stdlib\ArrayUtils;
 use Zend\Stratigility\MiddlewareInterface;
 
 class ListShortcodesMiddleware implements MiddlewareInterface
@@ -60,8 +61,11 @@ class ListShortcodesMiddleware implements MiddlewareInterface
 
             return new JsonResponse([
                 'shortUrls' => [
-                    'data' => $shortUrls,
+                    'data' => ArrayUtils::iteratorToArray($shortUrls->getCurrentItems()),
-//                    'pagination' => [],
+                    'pagination' => [
+                        'currentPage' => $shortUrls->getCurrentPageNumber(),
+                        'pagesCount' => $shortUrls->count(),
+                    ],
                 ]
             ]);
         } catch (\Exception $e) {

src/Paginator/Adapter/PaginableRepositoryAdapter.php

@@ -0,0 +1,56 @@
+<?php
+namespace Acelaya\UrlShortener\Paginator\Adapter;
+
+use Acelaya\UrlShortener\Repository\PaginableRepositoryInterface;
+use Zend\Paginator\Adapter\AdapterInterface;
+
+class PaginableRepositoryAdapter implements AdapterInterface
+{
+    const ITEMS_PER_PAGE = 10;
+
+    /**
+     * @var PaginableRepositoryInterface
+     */
+    private $paginableRepository;
+    /**
+     * @var null
+     */
+    private $searchTerm;
+    /**
+     * @var null
+     */
+    private $orderBy;
+
+    public function __construct(PaginableRepositoryInterface $paginableRepository, $searchTerm = null, $orderBy = null)
+    {
+        $this->paginableRepository = $paginableRepository;
+        $this->searchTerm = $searchTerm;
+        $this->orderBy = $orderBy;
+    }
+
+    /**
+     * Returns a collection of items for a page.
+     *
+     * @param  int $offset Page offset
+     * @param  int $itemCountPerPage Number of items per page
+     * @return array
+     */
+    public function getItems($offset, $itemCountPerPage)
+    {
+        return $this->paginableRepository->findList($itemCountPerPage, $offset, $this->searchTerm, $this->orderBy);
+    }
+
+    /**
+     * Count elements of an object
+     * @link http://php.net/manual/en/countable.count.php
+     * @return int The custom count as an integer.
+     * </p>
+     * <p>
+     * The return value is cast to an integer.
+     * @since 5.1.0
+     */
+    public function count()
+    {
+        return $this->paginableRepository->countList($this->searchTerm);
+    }
+}

src/Repository/PaginableRepositoryInterface.php

@@ -1,9 +1,11 @@
 <?php
 namespace Acelaya\UrlShortener\Repository;
 
-interface PaginableRepository
+interface PaginableRepositoryInterface
 {
     /**
+     * Gets a list of elements using provided filtering data
+     *
      * @param int|null $limit
      * @param int|null $offset
      * @param string|null $searchTerm
@@ -11,4 +13,12 @@ interface PaginableRepository
      * @return array
      */
     public function findList($limit = null, $offset = null, $searchTerm = null, $orderBy = null);
+
+    /**
+     * Counts the number of elements in a list using provided filtering data
+     *
+     * @param null $searchTerm
+     * @return int
+     */
+    public function countList($searchTerm = null);
 }

src/Repository/ShortUrlRepository.php

@@ -3,6 +3,7 @@ namespace Acelaya\UrlShortener\Repository;
 
 use Acelaya\UrlShortener\Entity\ShortUrl;
 use Doctrine\ORM\EntityRepository;
+use Doctrine\ORM\QueryBuilder;
 
 class ShortUrlRepository extends EntityRepository implements ShortUrlRepositoryInterface
 {
@@ -39,4 +40,23 @@ class ShortUrlRepository extends EntityRepository implements ShortUrlRepositoryI
 
         return $qb->getQuery()->getResult();
     }
+
+    /**
+     * Counts the number of elements in a list using provided filtering data
+     *
+     * @param null $searchTerm
+     * @return int
+     */
+    public function countList($searchTerm = null)
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb->select('COUNT(s)')
+           ->from(ShortUrl::class, 's');
+
+        if (isset($searchTerm)) {
+            // TODO
+        }
+
+        return (int) $qb->getQuery()->getSingleScalarResult();
+    }
 }

src/Repository/ShortUrlRepositoryInterface.php

@@ -3,6 +3,6 @@ namespace Acelaya\UrlShortener\Repository;
 
 use Doctrine\Common\Persistence\ObjectRepository;
 
-interface ShortUrlRepositoryInterface extends ObjectRepository, PaginableRepository
+interface ShortUrlRepositoryInterface extends ObjectRepository, PaginableRepositoryInterface
 {
 }

src/Service/ShortUrlService.php

@@ -2,6 +2,8 @@
 namespace Acelaya\UrlShortener\Service;
 
 use Acelaya\UrlShortener\Entity\ShortUrl;
+use Acelaya\UrlShortener\Paginator\Adapter\PaginableRepositoryAdapter;
+use Acelaya\UrlShortener\Repository\ShortUrlRepository;
 use Acelaya\ZsmAnnotatedServices\Annotation\Inject;
 use Doctrine\ORM\EntityManagerInterface;
 use Zend\Paginator\Paginator;
@@ -25,10 +27,17 @@ class ShortUrlService implements ShortUrlServiceInterface
     }
 
     /**
+     * @param int $page
      * @return Paginator|ShortUrl[]
      */
-    public function listShortUrls()
+    public function listShortUrls($page = 1)
     {
-        return $this->em->getRepository(ShortUrl::class)->findAll();
+        /** @var ShortUrlRepository $repo */
+        $repo = $this->em->getRepository(ShortUrl::class);
+        $paginator = new Paginator(new PaginableRepositoryAdapter($repo));
+        $paginator->setItemCountPerPage(PaginableRepositoryAdapter::ITEMS_PER_PAGE)
+                  ->setCurrentPageNumber($page);
+
+        return $paginator;
     }
 }

src/Service/ShortUrlServiceInterface.php

@@ -7,7 +7,8 @@ use Zend\Paginator\Paginator;
 interface ShortUrlServiceInterface
 {
     /**
-     * @return Paginator|ShortUrl[]
+     * @param int $page
+     * @return ShortUrl[]|Paginator
      */
-    public function listShortUrls();
+    public function listShortUrls($page = 1);
 }