68 lines
2.3 KiB
PHP
68 lines
2.3 KiB
PHP
<?php
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namespace App\Services;
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use App\Metadata;
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use App\MetadataResolver\DeniedHostException;
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use App\MetadataResolver\MetadataResolver;
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use App\Tag;
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use App\Utilities\Formatter;
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use GuzzleHttp\Exception\TransferException;
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use Illuminate\Support\Facades\DB;
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use Illuminate\Support\Facades\Log;
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class MetadataResolveService
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{
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/** @var MetadataResolver */
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private $resolver;
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/** @var Formatter */
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private $formatter;
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public function __construct(MetadataResolver $resolver, Formatter $formatter)
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{
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$this->resolver = $resolver;
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$this->formatter = $formatter;
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}
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public function execute(string $url): Metadata
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{
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// URLの正規化
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$url = $this->formatter->normalizeUrl($url);
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// 自分自身は解決しない
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if (parse_url($url, PHP_URL_HOST) === parse_url(config('app.url'), PHP_URL_HOST)) {
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throw new DeniedHostException($url);
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}
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return DB::transaction(function () use ($url) {
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// 無かったら取得
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// TODO: ある程度古かったら再取得とかありだと思う
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$metadata = Metadata::find($url);
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if ($metadata == null || ($metadata->expires_at !== null && $metadata->expires_at < now())) {
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try {
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$resolved = $this->resolver->resolve($url);
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$metadata = Metadata::updateOrCreate(['url' => $url], [
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'title' => $resolved->title,
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'description' => $resolved->description,
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'image' => $resolved->image,
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'expires_at' => $resolved->expires_at
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]);
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$tagIds = [];
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foreach ($resolved->normalizedTags() as $tagName) {
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$tag = Tag::firstOrCreate(['name' => $tagName]);
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$tagIds[] = $tag->id;
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}
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$metadata->tags()->sync($tagIds);
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} catch (TransferException $e) {
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// 何らかの通信エラーによってメタデータの取得に失敗した時、とりあえずエラーログにURLを残す
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Log::error(self::class . ': メタデータの取得に失敗 URL=' . $url);
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throw $e;
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}
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}
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return $metadata;
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});
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}
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}
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