SteamResolverを追加

app/MetadataResolver/MetadataResolver.php

@@ -27,6 +27,7 @@ class MetadataResolver implements Resolver
         '~ci-en\.jp/creator/\d+/article/\d+~' => CienResolver::class,
         '~www\.plurk\.com\/p\/.*~' => PlurkResolver::class,
         '~(adult\.)?contents\.fc2\.com\/article_search\.php\?id=\d+~' => FC2ContentsResolver::class,
+        '~store\.steampowered\.com/app/\d+~' => SteamResolver::class,
     ];
 
     public $mimeTypes = [

app/MetadataResolver/SteamResolver.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\MetadataResolver;
+
+use GuzzleHttp\Client;
+
+class SteamResolver implements Resolver
+{
+    /**
+     * @var Client
+     */
+    private $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
+    public function resolve(string $url): Metadata
+    {
+        if (preg_match('~store\.steampowered\.com/app/(\d+)~', $url, $matches) !== 1) {
+            throw new \RuntimeException("Unmatched URL Pattern: $url");
+        }
+        $appid = $matches[1];
+
+        $res = $this->client->get('https://store.steampowered.com/api/appdetails/?l=japanese&appids=' . $appid);
+        if ($res->getStatusCode() === 200) {
+            $json = json_decode($res->getBody()->getContents(), true);
+            $data = $json[$appid]['data'];
+            $metadata = new Metadata();
+
+            $metadata->title = $data['name'] ?? '';
+            $metadata->description = strip_tags(str_replace('<br />', PHP_EOL, html_entity_decode($data['short_description'] ?? '')));
+            $metadata->image = $data['header_image'] ?? '';
+
+            return $metadata;
+        } else {
+            throw new \RuntimeException("{$res->getStatusCode()}: $url");
+        }
+    }
+}