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: /(?:watch|user|myvideo|mylist)\d{1,14}/,
    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: /commons\.nicovideo\.jp\/user\/\d+/,
    link: 'http://%s',
  },
  {
    pattern: /niconicommons\.jp\/user\/\d+/,
    link: 'http://www.%s',
  },
  {
    pattern: /user\/illust\/\d+/,
    link: 'http://seiga.nicovideo.jp/%s',
  },
  {
    pattern: /clip\/\d+/,
    link: 'http://seiga.nicovideo.jp/%s',
  },
  {
    pattern: /ch\.nicovideo\.jp\/[a-zA-Z0-9][-_a-zA-Z0-9]+(?=[^\-_A-Za-z0-9\/]|$)/,
    link: 'http://%s',
  },
]

Instance Method Summary collapse

Constructor Details

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

Returns a new instance of NicoLinkFilter.



7
8
9
10
 
# File 'lib/html/pipeline/nico_link/filter.rb', line 7

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

Instance Method Details

#apply_filter(content, has_prev_node = false) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/html/pipeline/nico_link/filter.rb', line 24

def apply_filter(content, has_prev_node = false)
  content = content.dup
  self.patterns.each do |pattern_set|
    content.gsub!(pattern_set[:pattern]) do
      space = $1
      text = $2
      url = pattern_set[:link].gsub('%s', text)
      "#{space.size > 0 ? space : (has_prev_node ? ' ' : '')}<a href=\"#{ERB::Util.html_escape(url)}\">#{ERB::Util.html_escape(text)}</a>"
    end
  end
  content
end

#call ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/html/pipeline/nico_link/filter.rb', line 12

def call
  doc.search('text()').each do |node|
    next if has_ancestor?(node, IGNORE_PARENTS)
    content = node.to_html
    has_prev_node = !!(node.previous_element)
    html = apply_filter(content, has_prev_node)
    next if html == content
    node.replace(html)
  end
  doc
end

#create_pattern(key) ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
 
# File 'lib/html/pipeline/nico_link/filter.rb', line 46

def create_pattern(key)
  /
    (^|\W)
    (#{key})
    (?=
      \.+[ \t\W]|
      \.+$|
      [^0-9a-zA-Z_.]|
      $
    )
  /ix
end

#patterns ⇒ Object 



37
38
39
40
41
42
43
44
 
# File 'lib/html/pipeline/nico_link/filter.rb', line 37

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