Created PreviewGenerator module

module/PreviewGenerator/src/Service/PreviewGenerator.php

@@ -0,0 +1,57 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\PreviewGenerator\Service;
+
+use mikehaertl\wkhtmlto\Image;
+use Shlinkio\Shlink\Common\Exception\PreviewGenerationException;
+use Shlinkio\Shlink\PreviewGenerator\Image\ImageBuilderInterface;
+use Symfony\Component\Filesystem\Filesystem;
+
+use function sprintf;
+use function urlencode;
+
+/** @deprecated */
+class PreviewGenerator implements PreviewGeneratorInterface
+{
+    /** @var string */
+    private $location;
+    /** @var ImageBuilderInterface */
+    private $imageBuilder;
+    /** @var Filesystem */
+    private $filesystem;
+
+    public function __construct(ImageBuilderInterface $imageBuilder, Filesystem $filesystem, string $location)
+    {
+        $this->location = $location;
+        $this->imageBuilder = $imageBuilder;
+        $this->filesystem = $filesystem;
+    }
+
+    /**
+     * Generates and stores preview for provided website and returns the path to the image file
+     *
+     * @throws PreviewGenerationException
+     */
+    public function generatePreview(string $url): string
+    {
+        $image = $this->imageBuilder->build(Image::class, ['url' => $url]);
+
+        // If the file already exists, return its path
+        $cacheId = sprintf('preview_%s.%s', urlencode($url), $image->type);
+        $path = $this->location . '/' . $cacheId;
+        if ($this->filesystem->exists($path)) {
+            return $path;
+        }
+
+        // Save and check if an error occurred
+        $image->saveAs($path);
+        $error = $image->getError();
+        if (! empty($error)) {
+            throw PreviewGenerationException::fromImageError($error);
+        }
+
+        // Cache the path and return it
+        return $path;
+    }
+}