Module: ISOCodes

Defined in:
lib/iso_codes.rb

Defined Under Namespace

Classes: IndividualLanguage, Language, Macrolanguage, SpecialSituationLanguage

Constant Summary collapse

ISO_639_3_VERSION =

Version of the ISO 639-3 code set supported (see www.sil.org/iso639-3/download.asp).

'20110525'
ISO_639_3_MACROLANGUAGE_MAPPINGS_VERSION =

Version of the ISO 639-3 macrolanguage mappings supported (see www.sil.org/iso639-3/download.asp).

'20100128'

Class Method Summary collapse

Class Method Details

.all_iso_639_3_codes ⇒ Object

Returns an array containing all ISO 639-3 language codes.



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# File 'lib/iso_codes.rb', line 94

def all_iso_639_3_codes
  @@iso_639_3.keys
end

.find_iso_639_3_language(code) ⇒ Object

Returns an object describing the language identified by the ISO 639-3 identifier code.



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# File 'lib/iso_codes.rb', line 106

def find_iso_639_3_language(code)
  if @@iso_639_3.has_key?(code)
    klass, *rest = @@iso_639_3[code]
    klass.new(*rest)
  else
    nil
  end
end

.find_language(code) ⇒ Object

Returns an object describing the language identified by the language code code.



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# File 'lib/iso_codes.rb', line 100

def find_language(code)
  find_iso_639_3_language(code)
end

.get_data_filename(filename) ⇒ Object 



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# File 'lib/iso_codes.rb', line 121

def get_data_filename(filename)
  File.join(DATA_PATH, filename)
end

.load_iso_639_3 ⇒ Object 



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# File 'lib/iso_codes.rb', line 136

def load_iso_639_3
  data = {}

  read_data_file("iso-639-3_#{ISO_639_3_VERSION}.tab.gz", 8, "\t", true) do |args|
    identifier, part2b, part2t, part1, scope, language_type, ref_name, comment = args

    # Sanity checks
    raise ArgumentError, "missing identifier" if identifier.nil?
    raise ArgumentError, "missing reference name" if ref_name.nil?

    klass =
      case scope
      when 'I'
        IndividualLanguage
      when 'M'
        Macrolanguage
      when 'S'
        SpecialSituationLanguage
      else
        raise ArgumentError, "invalid scope"
      end

    language_type =
      case language_type
      when 'L'
        :living
      when 'E'
        :extinct
      when 'A'
        :ancient
      when 'H'
        :historic
      when 'C'
        :constructed
      when 'S'
        :special
      else
        raise ArgumentError, "invalid language type"
      end

    data[identifier] = [klass, nil, nil, identifier, part2b, part2t, part1, language_type, ref_name]
  end

  read_data_file("iso-639-3-macrolanguages_#{ISO_639_3_MACROLANGUAGE_MAPPINGS_VERSION}.tab.gz", 3, "\t", true) do |args|
    macrolanguage_identifier, individual_language_identifier, status = args

    case status
    when 'R'
      next #FIXME
    when 'A'
    else
      raise ArgumentError, "invalid status"
    end

    # Add macrolanguage to the individual language
    raise "individual language already has a macrolanguage " if data[individual_language_identifier][2]
    data[individual_language_identifier][2] = macrolanguage_identifier

    # Add individual language to macrolanguage
    data[macrolanguage_identifier][1] ||= []
    data[macrolanguage_identifier][1] << individual_language_identifier
  end

  data.each_pair { |k, v| v.freeze }

  data
end

.read_data_file(filename, field_count, delimiter, skip_first) ⇒ Object 



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# File 'lib/iso_codes.rb', line 125

def read_data_file(filename, field_count, delimiter, skip_first)
  Zlib::GzipReader.open(get_data_filename(filename)).each_line do |l|
    if skip_first
      skip_first = false
      next
    end

    yield l.chomp.split(delimiter, field_count)
  end
end