From 79f2198d74110be9cee1d8b6cb039f2b2855f51b Mon Sep 17 00:00:00 2001
From: isra <israel.alcalde@pridatect.com>
Date: Thu, 28 Jul 2022 08:39:24 +0200
Subject: [PATCH] Added useCase to find the last video

---
 .../Application/FindLast/FindLastQuery.php    | 12 ++++
 .../FindLast/FindLastQueryHandler.php         | 30 +++++++++
 src/Mooc/Videos/Domain/Video.php              |  4 ++
 src/Mooc/Videos/Domain/Videos.php             |  9 +++
 .../FindLast/FindLastQueryHandlerTest.php     | 63 +++++++++++++++++++
 5 files changed, 118 insertions(+)
 create mode 100644 src/Mooc/Videos/Application/FindLast/FindLastQuery.php
 create mode 100644 src/Mooc/Videos/Application/FindLast/FindLastQueryHandler.php
 create mode 100644 tests/Mooc/Videos/Application/FindLast/FindLastQueryHandlerTest.php

diff --git a/src/Mooc/Videos/Application/FindLast/FindLastQuery.php b/src/Mooc/Videos/Application/FindLast/FindLastQuery.php
new file mode 100644
index 000000000..4d03da17b
--- /dev/null
+++ b/src/Mooc/Videos/Application/FindLast/FindLastQuery.php
@@ -0,0 +1,12 @@
+<?php
+
+declare (strict_types=1);
+
+namespace CodelyTv\Mooc\Videos\Application\FindLast;
+
+use Elasticsearch\Endpoints\Sql\Query;
+
+final class FindLastQuery extends Query
+{
+
+}
\ No newline at end of file
diff --git a/src/Mooc/Videos/Application/FindLast/FindLastQueryHandler.php b/src/Mooc/Videos/Application/FindLast/FindLastQueryHandler.php
new file mode 100644
index 000000000..79a99699d
--- /dev/null
+++ b/src/Mooc/Videos/Application/FindLast/FindLastQueryHandler.php
@@ -0,0 +1,30 @@
+<?php
+
+declare (strict_types=1);
+
+namespace CodelyTv\Mooc\Videos\Application\FindLast;
+
+use CodelyTv\Mooc\Videos\Domain\Video;
+use CodelyTv\Mooc\Videos\Domain\VideoRepository;
+use CodelyTv\Shared\Domain\Bus\Query\QueryHandler;
+use CodelyTv\Shared\Domain\Criteria\Criteria;
+use CodelyTv\Shared\Domain\Criteria\Filters;
+use CodelyTv\Shared\Domain\Criteria\Order;
+use CodelyTv\Shared\Domain\Criteria\OrderBy;
+use CodelyTv\Shared\Domain\Criteria\OrderType;
+
+final class FindLastQueryHandler implements QueryHandler
+{
+
+    public function __construct(private VideoRepository $videoRepository)
+    {
+    }
+
+    public function __invoke(FindLastQuery $query): ?Video
+    {
+        $order = new Order(new OrderBy('created'), OrderType::desc());
+        $criteria = new Criteria(filters: new Filters([]), order: $order, offset: null, limit: 1);
+
+        return $this->videoRepository->searchByCriteria($criteria)->first();
+    }
+}
\ No newline at end of file
diff --git a/src/Mooc/Videos/Domain/Video.php b/src/Mooc/Videos/Domain/Video.php
index 6028dc104..24e030daa 100644
--- a/src/Mooc/Videos/Domain/Video.php
+++ b/src/Mooc/Videos/Domain/Video.php
@@ -7,9 +7,12 @@
 use CodelyTv\Mooc\Shared\Domain\Courses\CourseId;
 use CodelyTv\Mooc\Shared\Domain\Videos\VideoUrl;
 use CodelyTv\Shared\Domain\Aggregate\AggregateRoot;
+use DateTimeImmutable;
 
 final class Video extends AggregateRoot
 {
+    private DateTimeImmutable $created;
+
     public function __construct(
         private readonly VideoId $id,
         private readonly VideoType $type,
@@ -17,6 +20,7 @@ public function __construct(
         private readonly VideoUrl $url,
         private readonly CourseId $courseId
     ) {
+        $this->created = new DateTimeImmutable();
     }
 
     public static function create(
diff --git a/src/Mooc/Videos/Domain/Videos.php b/src/Mooc/Videos/Domain/Videos.php
index e749b0726..3a046780c 100644
--- a/src/Mooc/Videos/Domain/Videos.php
+++ b/src/Mooc/Videos/Domain/Videos.php
@@ -12,4 +12,13 @@ protected function type(): string
     {
         return Video::class;
     }
+
+    public function first(): ?Video
+    {
+        if (0 === $this->count()) {
+            return null;
+        }
+
+        return $this->items()[0];
+    }
 }
diff --git a/tests/Mooc/Videos/Application/FindLast/FindLastQueryHandlerTest.php b/tests/Mooc/Videos/Application/FindLast/FindLastQueryHandlerTest.php
new file mode 100644
index 000000000..206cdd28d
--- /dev/null
+++ b/tests/Mooc/Videos/Application/FindLast/FindLastQueryHandlerTest.php
@@ -0,0 +1,63 @@
+<?php
+
+declare (strict_types=1);
+
+namespace CodelyTv\Tests\Mooc\Videos\Application\FindLast;
+
+use CodelyTv\Mooc\Shared\Domain\Courses\CourseId;
+use CodelyTv\Mooc\Shared\Domain\Videos\VideoUrl;
+use CodelyTv\Mooc\Videos\Application\FindLast\FindLastQuery;
+use CodelyTv\Mooc\Videos\Application\FindLast\FindLastQueryHandler;
+use CodelyTv\Mooc\Videos\Domain\Video;
+use CodelyTv\Mooc\Videos\Domain\VideoId;
+use CodelyTv\Mooc\Videos\Domain\VideoRepository;
+use CodelyTv\Mooc\Videos\Domain\Videos;
+use CodelyTv\Mooc\Videos\Domain\VideoTitle;
+use CodelyTv\Mooc\Videos\Domain\VideoType;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+class FindLastQueryHandlerTest extends TestCase
+{
+    private MockObject|VideoRepository $videoRepository;
+    private FindLastQueryHandler $queryHandler;
+
+    protected function setUp(): void
+    {
+        $this->videoRepository = $this->createMock(VideoRepository::class);
+        $this->queryHandler = new FindLastQueryHandler($this->videoRepository);
+    }
+
+    public function testMustReturnNullGivenRepositoryWithoutVideos(): void
+    {
+        $this->videoRepository->expects(self::once())->method('searchByCriteria')->willReturn(new Videos([]));
+
+        $video = $this->queryHandler->__invoke(new FindLastQuery());
+
+        self::assertNull($video);
+    }
+
+    public function testMustReturnLastVideoGivenRepositoryWithVideos(): void
+    {
+        $video1 = Video::create(
+            VideoId::random(),
+            VideoType::interview(),
+            new VideoTitle('my video1 title'),
+            new VideoUrl('https://myvdeo1url.com'),
+            CourseId::random()
+        );
+        $video2 = Video::create(
+            VideoId::random(),
+            VideoType::interview(),
+            new VideoTitle('my video2 title'),
+            new VideoUrl('https://myvdeo2url.com'),
+            CourseId::random()
+        );
+        $this->videoRepository->expects(self::once())->method('searchByCriteria')->willReturn(new Videos([$video1, $video2]));
+
+        $video = $this->queryHandler->__invoke(new FindLastQuery());
+        self::assertSame($video, $video1);
+    }
+
+
+}