コンテンツ情報取得の実装をapi.phpから剥がした

2018-04-15 02:05:41 +09:00
parent 0f39b502e8
commit 7ca0acacb4
9 changed files with 190 additions and 66 deletions
--- a/app/MetadataResolver/OGPResolver.php
+++ b/app/MetadataResolver/OGPResolver.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace App\MetadataResolver;
+
+class OGPResolver implements Resolver
+{
+    public function resolve(string $url): Metadata
+    {
+        $client = new \GuzzleHttp\Client();
+        $res = $client->get($url);
+        if ($res->getStatusCode() === 200) {
+            return $this->parse($res->getBody());
+        } else {
+            throw new \RuntimeException("{$res->getStatusCode()}: $url");
+        }
+    }
+
+    public function parse(string $html): Metadata
+    {
+        $dom = new \DOMDocument();
+        @$dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
+        $xpath = new \DOMXPath($dom);
+
+        $metadata = new Metadata();
+
+        $titleNode = $xpath->query('//meta[@*="og:title"]');
+        foreach ($titleNode as $node) {
+            if (!empty($node->getAttribute('content'))) {
+                $metadata->title = $node->getAttribute('content');
+                break;
+            }
+        }
+
+        $descriptionNode = $xpath->query('//meta[@*="og:description"]');
+        foreach ($descriptionNode as $node) {
+            if (!empty($node->getAttribute('content'))) {
+                $metadata->description = $node->getAttribute('content');
+                break;
+            }
+        }
+
+        $imageNode = $xpath->query('//meta[@*="og:image"]');
+        foreach ($imageNode as $node) {
+            if (!empty($node->getAttribute('content'))) {
+                $metadata->image = $node->getAttribute('content');
+                break;
+            }
+        }
+
+        return $metadata;
+    }
+}