Class: HTML::Pipeline::NicoLinkFilter

Inherits:
Filter
  • Object
show all
Defined in:
lib/html/pipeline/nico_link/filter.rb

Constant Summary collapse

IGNORE_PARENTS = 
%w[pre code a style script].to_set
DEFAULT_PATTERNS = 
[
  {
    pattern: /(?:sm|nm|so|ca|ax|yo|nl|ig|na|cw|z[a-e]|om|sk|yk)\d{1,14}/,
    link: 'http://www.nicovideo.jp/watch/%s'
  },
  {
    pattern: %r{(?:watch|user|myvideo|mylist|series)/\d{1,10}},
    link: 'http://www.nicovideo.jp/%s'
  },
  {
    pattern: /co\d{1,14}/,
    link: 'http://com.nicovideo.jp/%s'
  },
  {
    pattern: /ch\d{1,14}/,
    link: 'http://ch.nicovideo.jp/%s'
  },
  {
    pattern: /ar\d{1,14}/,
    link: 'http://ch.nicovideo.jp/article/%s'
  },
  {
    pattern: /td\d+/,
    link: 'http://3d.nicovideo.jp/works/%s'
  },
  {
    pattern: /nc\d{1,14}/,
    link: 'http://commons.nicovideo.jp/material/%s'
  },
  {
    pattern: /(?:dw\d+|az[A-Z0-9]{10}|ys[a-zA-Z0-9-]+_[a-zA-Z0-9-]+|ga\d+|ip[\d_]+|gg[a-zA-Z0-9]+-[a-zA-Z0-9-]+)/,
    link: 'http://ichiba.nicovideo.jp/item/%s'
  },
  {
    pattern: /lv\d{1,14}/,
    link: 'http://live.nicovideo.jp/watch/%s'
  },
  {
    pattern: /[sm]g\d{1,14}/,
    link: 'http://seiga.nicovideo.jp/watch/%s'
  },
  {
    pattern: /bk\d{1,14}/,
    link: 'http://seiga.nicovideo.jp/watch/%s'
  },
  {
    pattern: /im\d{1,14}/,
    link: 'http://seiga.nicovideo.jp/seiga/%s'
  },
  {
    pattern: %r{commons\.nicovideo\.jp/user/\d+},
    link: 'http://%s'
  },
  {
    pattern: %r{niconicommons\.jp/user/\d+},
    link: 'http://www.%s'
  },
  {
    pattern: %r{user/illust/\d+},
    link: 'http://seiga.nicovideo.jp/%s'
  },
  {
    pattern: %r{clip/\d+},
    link: 'http://seiga.nicovideo.jp/%s'
  },
  {
    pattern: %r{ch\.nicovideo\.jp/[a-zA-Z0-9][-_a-zA-Z0-9]+(?=[^\-_A-Za-z0-9/]|$)},
    link: 'http://%s'
  },
  {
    pattern: /jps\d{1,14}/,
    link: 'http://jpstore.dwango.jp/products/detail.php?product_id=%s',
    convert: ->(str) { str.sub('jps', '') }
  },
  {
    pattern: /gm\d+/,
    link: 'https://game.nicovideo.jp/atsumaru/games/%s'
  },
  {
    pattern: /nq\d+/,
    link: 'https://q.nicovideo.jp/watch/%s'
  }
].freeze

Instance Method Summary collapse

Constructor Details

#initialize(doc, context = nil, result = nil) ⇒ NicoLinkFilter

Returns a new instance of NicoLinkFilter.



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# File 'lib/html/pipeline/nico_link/filter.rb', line 9

def initialize(doc, context = nil, result = nil)
  super
  @context = context || {}
end

Instance Method Details

#apply_filter(content) ⇒ Object 



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# File 'lib/html/pipeline/nico_link/filter.rb', line 27

def apply_filter(content)
  content = content.dup
  content.gsub!(merged_pattern) do |text|
    index = Regexp.last_match.captures.index { |n| n }
    pattern_set = patterns[index]
    value = pattern_set[:convert] ? pattern_set[:convert].call(text) : text
    url = pattern_set[:link].gsub('%s', value)
    "<a href=\"#{ERB::Util.html_escape(url)}\">#{ERB::Util.html_escape(text)}</a>"
  end
  content
end

#call ⇒ Object 



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# File 'lib/html/pipeline/nico_link/filter.rb', line 14

def call
  doc.xpath('.//text()').each do |node|
    next if has_ancestor?(node, IGNORE_PARENTS)

    content = node.to_html
    html = apply_filter(content)
    next if html == content

    node.replace(html)
  end
  doc
end

#merged_pattern ⇒ Object 



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# File 'lib/html/pipeline/nico_link/filter.rb', line 49

def merged_pattern
  @merged_pattern ||= /\b(?:(#{patterns.map { |n| n[:pattern] }.join(')|(')}))\b/
end

#patterns ⇒ Object 



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# File 'lib/html/pipeline/nico_link/filter.rb', line 39

def patterns
  @patterns ||= (@context[:nico_link] || DEFAULT_PATTERNS).map do |pattern_set|
    {
      pattern: pattern_set[:pattern],
      link: pattern_set[:link],
      convert: pattern_set[:convert]
    }
  end
end