Season, episode and episode type inferred from title

episode.rb

def infer_type_season_and_episode!
    # try to detect episode number
    tome_chapter_matcher = /(?>\bT(?>ome)?[\s\.]*(?<tome>[0-9]+)\b)?[\s\.]*\bCh(?>apitre|apter)?[\s\.]*(?<chapter>[0-9]+)\b/i
    season_episode_matcher = /\b(S(?>eason|aison)?[\s\.]*(?<season>[0-9]+)[\s.]*)?(E|É)(?>pisode|p)?[\s\.]*(?<episode>[0-9]+)\b/i
    simple_episode_matcher = /(?>#{::Regexp.escape(self.feed.try(:title))}\s*\#?|\#\s*|°\s*|(É|E)(?>pisode|p)[\s\.]*)(?<episode>[0-9]+)\b(?>$|\.?\s+|\:)/i

    _tome = _chapter = _season = _episode = 0

    tome_chapter_match = tome_chapter_matcher.match(self.title)
    if tome_chapter_match
      Rails.logger.debug("Result from regexp : #{tome_chapter_match.inspect}")
      _tome = tome_chapter_match[:tome].to_i
      _chapter = tome_chapter_match[:chapter].to_i
    end
    Rails.logger.debug("Found tome #{_tome} and chapter #{_chapter}")

    season_episode_match = season_episode_matcher.match(self.title)
    if season_episode_match
      Rails.logger.debug("Result from regexp : #{season_episode_match.inspect}")
      _season = season_episode_match[:season].to_i
      _episode = season_episode_match[:episode].to_i
    end
    Rails.logger.debug("Found season #{_season} and episode #{_episode}")

    unless _tome + _chapter + _season + _episode > 0
      simple_episode_match = simple_episode_matcher.match(self.title)
      Rails.logger.debug("Result from regexp : #{simple_episode_match.inspect}")
      if simple_episode_match
        _episode = simple_episode_match[:episode].to_i
        Rails.logger.debug("Found episode #{_episode}")
      end
    end

    _bonus = self.title.match(/bonus/i).present?
    _trailer = self.title.match(/trailer|bande[\-\ ]annonce|teaser|teasing/i).present?
    Rails.logger.debug("bonus #{_bonus.to_json} _trailer : #{_trailer.to_json}")
    Rails.logger.debug(((_season+_tome+_episode+_chapter > 0) or _bonus or _trailer).to_json)

    self.inferred_type_season_and_episode =  ((_season+_tome+_episode+_chapter > 0) or _bonus or _trailer)

    if self.inferred_type_season_and_episode
      self.episode_type = _bonus ? "bonus" : _trailer ? "trailer" : "full"

      if _season > 0
        if _tome > 0
          self.season = 100*_tome+_season
        else
          self.season = _season
        end
      elsif _tome > 0
        self.season = _tome
      end

      if _episode > 0
        if _chapter > 0
          self.episode = 100*_chapter+_episode
        else
          self.episode = _episode
        end
      elsif _chapter > 0
        self.episode = _chapter
      end
    end
  end