Úkol 2 - Vojtěch Bartoš

app/Resources/views/category/detail.html.twig

@@ -1,8 +1,13 @@
 {% extends 'base.html.twig' %}
 
 {% block body %}
+    {% include 'components/breadcrumb.html.twig' %}
+
     <div class="row">
         {% include 'components/list.html.twig' %}
     </div>
+
+
+    {% include ':components:paginator.html.twig' %}
 {% endblock %}
 

app/Resources/views/components/breadcrumb.html.twig

@@ -0,0 +1,12 @@
+<ol class="breadcrumb">
+    {% for current in breadcrumb %}
+        {% if current == category and product is not defined %}
+                <li class="active">{{ current.title }}</li>
+        {% else %}
+                <li><a href="{{ path("category_detail", {"slug": current.slug }) }}">{{ current.title }}</a></li>
+        {% endif %}
+    {% endfor %}
+    {% if product is defined %}
+        <li class="active">{{ product.title }}</li>
+    {% endif %}
+</ol>

app/Resources/views/components/paginator.html.twig

@@ -0,0 +1,18 @@
+<nav aria-label="Page navigation">
+    <ul class="pagination">
+        <li>
+            {% if prev %}
+                <a href="{{ path("category_detail", {"slug": category.slug, 'last': prev, 'direction': 'prev'}) }}" aria-label="Previous">
+                    <span aria-hidden="true">&laquo;</span>
+                </a>
+            {% endif %}
+        </li>
+        <li>
+            {% if next %}
+                <a href="{{ path("category_detail", {"slug": category.slug, 'last': next, 'direction': 'next'}) }}" aria-label="Next">
+                    <span aria-hidden="true">&raquo;</span>
+                </a>
+            {% endif %}
+        </li>
+    </ul>
+</nav>

src/AppBundle/Controller/CategoryController.php

@@ -3,6 +3,7 @@
 
 use AppBundle\Entity\Category;
 use AppBundle\Entity\Product;
+use AppBundle\Repository\ProductRepository;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
@@ -14,25 +15,52 @@
  */
 class CategoryController extends Controller
 {
-	/**
-	 * @Route("/vyber/{slug}", name="category_detail")
-	 * @Template("category/detail.html.twig")
-	 *
-	 * @param Request $request
-	 * @return array
-	 */
-	public function categoryDetail(Request $request)
+    const DIRECTION_NEXT = 'next';
+    const DIRECTION_PREV = 'prev';
+
+    /**
+     * @Route("/vyber/{slug}/{last}/{direction}", name="category_detail", requirements={"last": "\d+"})
+     * @Template("category/detail.html.twig")
+     *
+     * @param string $slug
+     * @param int $last
+     * @param string $direction
+     * @return array
+     * @internal param Request $request
+     */
+	public function categoryDetail($slug, $last = 0, $direction = self::DIRECTION_NEXT)
 	{
 		$category = $this->getDoctrine()->getRepository(Category::class)->findOneBy([
-			"slug" => $request->attributes->get("slug"),
+			"slug" => $slug,
 		]);
 
 		if (!$category) {
 			throw new NotFoundHttpException("Kategorie neexistuje");
 		}
 
+		if ($direction === self::DIRECTION_NEXT) {
+            $products = $this->getDoctrine()->getRepository(Product::class)->findNextByCategory($category, $last);
+        } else {
+            $products = $this->getDoctrine()->getRepository(Product::class)->findPrevByCategory($category, $last);
+        }
+
+        if (current($products)->getId() !== 1) {
+            $prev = current($products)->getId();
+        } else {
+            $prev = null;
+        }
+
+        if (isset($products[ProductRepository::PAGE_SIZE])) {
+            unset($products[ProductRepository::PAGE_SIZE]);
+            $next = end($products)->getId();
+        } else {
+            $next = null;
+        }
+
 		return [
-			"products" => $this->getDoctrine()->getRepository(Product::class)->findByCategory($category),
+			"products" => $products,
+			"prev" => $prev,
+			"next" => $next,
 			"categories" => $this->getDoctrine()->getRepository(Category::class)->findBy(
 				[
 					"parentCategory" => $category,
@@ -42,7 +70,7 @@ public function categoryDetail(Request $request)
 				]
 			),
 			"category" => $category,
+            "breadcrumb" => $this->getDoctrine()->getRepository(Category::class)->getParents($category)
 		];
 	}
-
 }

src/AppBundle/Repository/CategoryRepository.php

@@ -3,6 +3,7 @@
 namespace AppBundle\Repository;
 
 use Doctrine\ORM\EntityRepository;
+use AppBundle\Entity\Category;
 
 /**
  * CategoryRepository
@@ -12,4 +13,16 @@
  */
 class CategoryRepository extends EntityRepository
 {
+    public function getParents(Category $category)
+    {
+        return $this->_em->createQuery("
+            SELECT ancestor
+            FROM AppBundle\Entity\Category child, AppBundle\Entity\Category ancestor
+            WHERE child.left >= ancestor.left
+                AND child.left <= ancestor.right
+                AND child.id = :current
+            ORDER BY ancestor.left")
+            ->setParameter("current", $category->getId())
+            ->getResult();
+    }
 }

src/AppBundle/Repository/ProductRepository.php

@@ -8,23 +8,70 @@
 
 class ProductRepository extends EntityRepository
 {
+    const PAGE_SIZE = 3;
 
-	/**
-	 * @param Category $category
-	 * @return Product[]
-	 */
-	public function findByCategory(Category $category)
+    /**
+     * @param Category $category
+     * @param int $last
+     * @return Product[]
+     */
+    public function findPrevByCategory(Category $category, $last = 0)
+    {
+        return $this->inverseResult($this->_em->createQuery('SELECT p
+			FROM AppBundle\Entity\Product p
+			JOIN AppBundle\Entity\ProductCategory pc WITH p = pc.product
+			JOIN AppBundle\Entity\Category c WITH pc.category = c
+			WHERE c.left >= :lft and c.right <= :rgt
+			AND p.id <= :last
+			GROUP BY p
+			ORDER BY p.id DESC
+		')
+            ->setParameter("lft", $category->getLeft())
+            ->setParameter("rgt", $category->getRight())
+            ->setParameter("last", $last)
+            ->setMaxResults(self::PAGE_SIZE + 1)
+            ->getResult());
+    }
+
+
+    /**
+     * @param array $entities
+     * @return array
+     */
+    protected function inverseResult(array $entities)
+    {
+        $result = [];
+
+        $max = count($entities) - 1;
+        $min = 0;
+        for ($i = $max; $i >= $min; $i--) {
+            $result[] = $entities[$i];
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param Category $category
+     * @param int $last
+     * @return Product[]
+     */
+	public function findNextByCategory(Category $category, $last = 0)
 	{
 		return $this->_em->createQuery('SELECT p
 			FROM AppBundle\Entity\Product p
 			JOIN AppBundle\Entity\ProductCategory pc WITH p = pc.product
 			JOIN AppBundle\Entity\Category c WITH pc.category = c
 			WHERE c.left >= :lft and c.right <= :rgt
+			AND p.id > :last
 			GROUP BY p
+			ORDER BY p.id ASC
 		')
 			->setParameter("lft", $category->getLeft())
 			->setParameter("rgt", $category->getRight())
-			->getResult();
+			->setParameter("last", $last)
+            ->setMaxResults(self::PAGE_SIZE + 1)
+            ->getResult();
 	}
 
 }