28 行
1.3 KiB
Ruby
28 行
1.3 KiB
Ruby
class PostMetadataFetcher
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def self.fetch raw_url
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uri, = Preview::UrlSafety.validate(raw_url)
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response = Preview::HttpFetcher.fetch(uri.to_s, max_bytes: Preview::ThumbnailFetcher::HTML_MAX_BYTES)
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metadata = Preview::HtmlMetadataExtractor.extract(response)
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document = Nokogiri::HTML.parse(response.body)
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content = -> name { document.at_css("meta[property='#{ name }'], meta[name='#{ name }']")&.[]('content')&.strip.presence }
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duration = content.call('og:video:duration') || content.call('video:duration')
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published = content.call('article:published_time') || content.call('date')
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published_at = Time.zone.parse(published.to_s) if published.present?
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platform_tags = platform_tags(uri)
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{ title: metadata[:title],
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thumbnail_base: Preview::KnownSiteExtractor.thumbnail_url(uri) || metadata[:image_url],
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original_created_from: published_at&.iso8601,
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original_created_before: published_at && (published_at + 1.minute).iso8601,
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duration: duration&.to_f&.then { _1.positive? ? (_1 * 1_000).round : nil },
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tags: platform_tags.join(' ') }
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end
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def self.platform_tags uri
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return ['動画', 'YouTube'] if Preview::KnownSiteExtractor.thumbnail_url(uri)
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return ['動画', 'ニコニコ'] if Preview::KnownSiteExtractor.niconico_video_id(uri)
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[]
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end
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private_class_method :platform_tags
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end
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