Class: LanguageFilter::Filter

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

Constant Summary collapse

CREATIVE_BEG_REGEX = 
'(?<=\\s|\\A|_|\\-|\\.)'
CREATIVE_END_REGEX = 
'(?=\\b|\\s|\\z|_|\\-|\\.)'
DEFAULT_EXCEPTIONLIST = 
[]
DEFAULT_MATCHLIST = 
File.dirname(__FILE__) + "/../config/matchlists/profanity.txt"
DEFAULT_REPLACEMENT = 
:stars
DEFAULT_CREATIVE_LETTERS = 
false

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Filter

Returns a new instance of Filter.



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# File 'lib/language_filter.rb', line 20

def initialize(options={})
  @creative_letters = if options[:creative_letters] then
    options[:creative_letters]
  else DEFAULT_CREATIVE_LETTERS end

  @matchlist = if options[:matchlist] then
    validate_list_content(options[:matchlist])
    set_list_content(options[:matchlist])
  else set_list_content(DEFAULT_MATCHLIST) end
  @creative_matchlist = @matchlist.map {|list_item| use_creative_letters(list_item)}

  @exceptionlist = if options[:exceptionlist] then
    validate_list_content(options[:exceptionlist])
    set_list_content(options[:exceptionlist])
  elsif options[:matchlist].class == Symbol then
    set_list_content(options[:matchlist],folder: "exceptionlists")
  else set_list_content(DEFAULT_EXCEPTIONLIST) end

  @replacement = options[:replacement] || DEFAULT_REPLACEMENT
  validate_replacement
end

Instance Attribute Details

#creative_letters ⇒ Object

Returns the value of attribute creative_letters.



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

def creative_letters
  @creative_letters
end

#creative_matchlist ⇒ Object (readonly)

Returns the value of attribute creative_matchlist.



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# File 'lib/language_filter.rb', line 10

def creative_matchlist
  @creative_matchlist
end

#exceptionlist ⇒ Object

Returns the value of attribute exceptionlist.



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

def exceptionlist
  @exceptionlist
end

#matchlist ⇒ Object

Returns the value of attribute matchlist.



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

def matchlist
  @matchlist
end

#replacement ⇒ Object

Returns the value of attribute replacement.



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

def replacement
  @replacement
end

Instance Method Details

#match?(text) ⇒ Boolean

LANGUAGE

Returns:

  • (Boolean) 


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# File 'lib/language_filter.rb', line 72

def match?(text)
  return false unless text.to_s.size >= 3
  chosen_matchlist = case @creative_letters
  when true then @creative_matchlist
  else @matchlist
  end
  chosen_matchlist.each do |list_item|
    start_at = 0
    text.scan(%r"#{beg_regex}#{list_item}#{end_regex}"i) do |match|
      unless @exceptionlist.empty? then
        match_start = text[start_at..-1].index(%r"#{beg_regex}#{list_item}#{end_regex}"i) + start_at
        match_end = match_start + match.size-1
      end
      return true if @exceptionlist.empty? or not protected_by_exceptionlist?(match_start,match_end,text,start_at)
      start_at = match_end + 1 unless @exceptionlist.empty?
    end
  end
  false
end

#matched(text) ⇒ Object 



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# File 'lib/language_filter.rb', line 92

def matched(text)
  words = []
  return words unless text.to_s.size >= 3
  chosen_matchlist = case @creative_letters
  when true then @creative_matchlist
  else @matchlist
  end
  chosen_matchlist.each do |list_item|
    start_at = 0
    text.scan(%r"#{beg_regex}#{list_item}#{end_regex}"i) do |match|
      unless @exceptionlist.empty? then
        match_start = text[start_at..-1].index(%r"#{beg_regex}#{list_item}#{end_regex}"i) + start_at
        match_end = match_start + match.size-1
      end
      words << match if @exceptionlist.empty? or not protected_by_exceptionlist?(match_start,match_end,text,start_at)
      start_at = match_end + 1 unless @exceptionlist.empty?
    end
  end
  words.uniq
end

#sanitize(text) ⇒ Object 



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# File 'lib/language_filter.rb', line 113

def sanitize(text)
  return text unless text.to_s.size >= 3
  chosen_matchlist = case @creative_letters
  when true then @creative_matchlist
  else @matchlist
  end
  chosen_matchlist.each do |list_item|
    start_at = 0
    text.gsub!(%r"#{beg_regex}#{list_item}#{end_regex}"i) do |match|
      unless @exceptionlist.empty? then
        match_start = text[start_at..-1].index(%r"#{beg_regex}#{list_item}#{end_regex}"i) + start_at
        match_end = match_start + match.size-1
      end
      unless @exceptionlist.empty? or not protected_by_exceptionlist?(match_start,match_end,text,start_at) then
        start_at = match_end + 1 unless @exceptionlist.empty?
        match
      else
        start_at = match_end + 1 unless @exceptionlist.empty?
        replace(match)
      end
    end
  end
  text
end