add Moderation.php (#14)

Co-authored-by: bastien <bastien.ollier1@gmail.com>
Co-authored-by: clfreville2 <clement.freville2@etu.uca.fr>
Reviewed-on: https://codefirst.iut.uca.fr/git/clement.freville2/herbarium/pulls/14
Reviewed-by: Clément FRÉVILLE <clement.freville2@etu.uca.fr>

src/Service/DummyImageSafetyService.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Service;
+
+use Symfony\Component\HttpFoundation\File\File;
+
+class DummyImageSafetyService implements ImageSafetyServiceInterface
+{
+    public function isValid(File $file): bool
+    {
+        return true;
+    }
+}

src/Service/ImageSafetyServiceInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Service;
+
+use Symfony\Component\HttpFoundation\File\File;
+
+interface ImageSafetyServiceInterface
+{
+    public function isValid(File $file): bool;
+}

src/Service/SightEngineImageSafetyService.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Service;
+
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\HttpFoundation\File\File;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+readonly class SightEngineImageSafetyService implements ImageSafetyServiceInterface
+{
+    public function __construct(
+        private HttpClientInterface $client,
+        #[Autowire(env: 'API_USER_SIGHT_ENGINE')] private string $apiUser,
+        #[Autowire(env: 'API_KEY_SIGHT_ENGINE')] private string $apiKey,
+    )
+    {
+    }
+
+    public function isValid(File $file): bool
+    {
+        $handle = fopen($file->getRealPath(), 'r');
+        if ($handle === false) {
+            return false;
+        }
+        $response = $this->client->request('POST', 'https://api.sightengine.com/1.0/check.json', [
+            'body' => [
+                'media' => $handle,
+                'models' => 'nudity-2.1',
+                'api_user' => $this->apiUser,
+                'api_secret' => $this->apiKey,
+            ],
+        ]);
+        fclose($handle);
+
+        $output = $response->toArray();
+        $scoreNudity = $output['nudity'];
+
+        return $scoreNudity['sexual_activity'] < 0.8 &&
+            $scoreNudity['sexual_display'] < 0.8 &&
+            $scoreNudity['erotica'] < 0.8;
+    }
+}