32 行
849 B
Ruby
32 行
849 B
Ruby
module Preview
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class KnownSiteExtractor
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def self.thumbnail_url(uri)
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youtube_thumbnail(uri)
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end
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def self.niconico_video_id(uri)
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case uri.host&.downcase
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when 'www.nicovideo.jp', 'nicovideo.jp'
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uri.path[%r{\A/watch/(sm\d+)\z}, 1]
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when 'nico.ms'
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uri.path[%r{\A/(sm\d+)\z}, 1]
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end
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end
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def self.youtube_thumbnail(uri)
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id =
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case uri.host&.downcase
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when 'youtu.be'
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uri.path.split('/').reject(&:blank?).first
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when 'www.youtube.com', 'youtube.com', 'm.youtube.com'
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uri.path == '/watch' ? URI.decode_www_form(uri.query.to_s).to_h['v'] : nil
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end
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return unless id&.match?(/\A[A-Za-z0-9_-]{6,20}\z/)
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"https://i.ytimg.com/vi/#{ id }/hqdefault.jpg"
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end
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private_class_method :youtube_thumbnail
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end
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end
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