Class: SensitiveWords

Inherits:
Object
  • Object
show all
Defined in:
lib/sensitive_words.rb

Constant Summary collapse

@@dict = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ SensitiveWords

Returns a new instance of SensitiveWords.



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# File 'lib/sensitive_words.rb', line 54

def initialize(input)
  @input = input
  @words = []
end

Class Method Details

.get_dict_file_hash(path) ⇒ Object 



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# File 'lib/sensitive_words.rb', line 17

def get_dict_file_hash(path)
  tree = {}
  file = File.open(path, 'r')
  if file
    file.each_line do |line|
      line = line.chomp
      next if line.empty?
      node = nil
      line.chars.each do |c|
        if node
          node[c] ||= {}
          node = node[c]
        else
          tree[c] ||= {}
          node = tree[c]
        end
      end
      node[:end] = :id
    end
  end
  tree
ensure
  file.close if file
end

.load_dict(dict_path) ⇒ Object 



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# File 'lib/sensitive_words.rb', line 9

def load_dict(dict_path)
  new_dict = get_dict_file_hash(dict_path)
  dict = @@dict.merge new_dict
  @@dict = dict
rescue Errno::ENOENT => boom
  puts "#{boom.class} - #{boom.message}"
end

.sensitive_words(input, max = nil) ⇒ Object 



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# File 'lib/sensitive_words.rb', line 42

def sensitive_words(input,max=nil)
  ins = SensitiveWords.new(input)
  max = max.to_i
  if max > 0
    ins.sensitive_words(max)
  else
    ins.all_sensitive_words
  end
end

Instance Method Details

#all_sensitive_words ⇒ Object

所有的敏感词



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# File 'lib/sensitive_words.rb', line 79

def all_sensitive_words
  @node, @words = @@dict, []
  @word, @queue = '', []

  @input.chars.each do |char|
    loop do 
      break if @queue.empty?
      chr = @queue.shift
      process_check(chr, true)
    end
    process_check(char)
  end

  process_check('')
  @words
end

#sensitive_words(max) ⇒ Object

只要有限个敏感词



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# File 'lib/sensitive_words.rb', line 60

def sensitive_words(max)
  @node, @words = @@dict, []
  @word, @queue = '', []

  @input.chars.each do |char|
    break if @words.size >= max
    loop do 
      break if @queue.empty?
      chr = @queue.shift
      process_check(chr, true)
    end
    process_check(char)
  end

  process_check('')
  @words.first(max)
end