Created TagService

module/Core/config/dependencies.config.php

@@ -16,6 +16,7 @@ return [
             Service\VisitsTracker::class => AnnotatedFactory::class,
             Service\ShortUrlService::class => AnnotatedFactory::class,
             Service\VisitService::class => AnnotatedFactory::class,
+            Service\Tag\TagService::class => AnnotatedFactory::class,
 
             // Middleware
             Action\RedirectAction::class => AnnotatedFactory::class,

module/Core/src/Service/Tag/TagService.php

@@ -0,0 +1,34 @@
+<?php
+namespace Shlinkio\Shlink\Core\Service\Tag;
+
+use Acelaya\ZsmAnnotatedServices\Annotation as DI;
+use Doctrine\ORM\EntityManagerInterface;
+use Shlinkio\Shlink\Core\Entity\Tag;
+
+class TagService implements TagServiceInterface
+{
+    /**
+     * @var EntityManagerInterface
+     */
+    private $em;
+
+    /**
+     * VisitService constructor.
+     * @param EntityManagerInterface $em
+     *
+     * @DI\Inject({"em"})
+     */
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    /**
+     * @return Tag[]
+     * @throws \UnexpectedValueException
+     */
+    public function listTags()
+    {
+        return $this->em->getRepository(Tag::class)->findBy([], ['name' => 'DESC']);
+    }
+}

module/Core/src/Service/Tag/TagServiceInterface.php

@@ -0,0 +1,12 @@
+<?php
+namespace Shlinkio\Shlink\Core\Service\Tag;
+
+use Shlinkio\Shlink\Core\Entity\Tag;
+
+interface TagServiceInterface
+{
+    /**
+     * @return Tag[]
+     */
+    public function listTags();
+}

module/Core/test/Service/Tag/TagServiceTest.php

@@ -0,0 +1,51 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Core\Service\Tag;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+use Prophecy\Argument;
+use Prophecy\Prophecy\MethodProphecy;
+use Prophecy\Prophecy\ObjectProphecy;
+use Shlinkio\Shlink\Core\Entity\Tag;
+use Shlinkio\Shlink\Core\Service\Tag\TagService;
+use PHPUnit\Framework\TestCase;
+
+class TagServiceTest extends TestCase
+{
+    /**
+     * @var TagService
+     */
+    private $service;
+    /**
+     * @var ObjectProphecy
+     */
+    private $em;
+
+    public function setUp()
+    {
+        $this->em = $this->prophesize(EntityManagerInterface::class);
+        $this->service = new TagService($this->em->reveal());
+    }
+
+    /**
+     * @test
+     */
+    public function listTagsDelegatesOnRepository()
+    {
+        $expected = [new Tag(), new Tag()];
+
+        $repo = $this->prophesize(EntityRepository::class);
+        /** @var MethodProphecy $find */
+        $find = $repo->findBy(Argument::cetera())->willReturn($expected);
+        /** @var MethodProphecy $getRepo */
+        $getRepo = $this->em->getRepository(Tag::class)->willReturn($repo->reveal());
+
+        $result = $this->service->listTags();
+
+        $this->assertEquals($expected, $result);
+        $find->shouldHaveBeenCalled();
+        $getRepo->shouldHaveBeenCalled();
+    }
+}