Module: PolishNumber

Defined in:
lib/polish_number.rb

Constant Summary collapse

TRANSLATIONS = 
{
  0 => 'zero',
  1 => 'jeden',
  2 => 'dwa',
  3 => 'trzy',
  4 => 'cztery',
  5 => 'pięć',
  7 => 'siedem',
  6 => 'sześć',
  8 => 'osiem',
  9 => 'dziewięć',
  10 => 'dziesięć',
  11 => 'jedenaście',
  12 => 'dwanaście',
  13 => 'trzynaście',
  14 => 'czternaście',
  15 => 'piętnaście',
  16 => 'szesnaście',
  17 => 'siedemnaście',
  18 => 'osiemnaście',
  19 => 'dziewiętnaście',
  20 => 'dwadzieścia',
  30 => 'trzydzieści',
  40 => 'czterdzieści',
  50 => 'pięćdziesiąt',
  60 => 'sześćdziesiąt',
  70 => 'siedemdziesiąt',
  80 => 'osiemdziesiąt',
  90 => 'dziewięćdziesiąt',
  100 => 'sto',
  200 => 'dwieście',
  300 => 'trzysta',
  400 => 'czterysta',
  500 => 'pięćset',
  600 => 'sześćset',
  700 => 'siedemset',
  800 => 'osiemset',
  900 => 'dziewięćset',
  1000 => 'tysiąc'
}.freeze
THOUSANDS = 
rehash({
  '1' => 'tysiąc',
  '2_3_4' => 'tysiące', # 22..24, 32..34
  '5' => 'tysięcy', # 0, 5..21, 25..31
})

Class Method Summary collapse

Class Method Details

.rehash(hash) ⇒ Object 



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# File 'lib/polish_number.rb', line 45

def self.rehash(hash)
  result = Hash.new(hash['5'])
  result[0] = hash['5']
  result[1] = hash['1']
  result[2] = result[3] = result[4] = hash['2_3_4']
end

.translate(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 111

def self.translate(number)
  number = number.to_i
  case number
  when 0..19
    return translate_0_19(number)
  when 20..99
    return translate_20_99(number)
  when 100..999
    return translate_100_999(number)
  when 1000..9999
    return translate_1000_9999(number)
  end
end

.translate_0_19(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 58

def self.translate_0_19(number)
  TRANSLATIONS[number]
end

.translate_0_99(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 69

def self.translate_0_99(number)
  number < 20 ? translate_0_19(number) : translate_20_99(number)
end

.translate_0_999(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 88

def self.translate_0_999(number)
  number < 100 ? translate_0_99(number) : translate_100_999(number)
end

.translate_1000_9999(number) ⇒ Object 



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

def self.translate_1000_9999(number)
  return TRANSLATIONS[number] if TRANSLATIONS.has_key? number

  translations = []

  thousands = number/1000
  if thousands == 1
    translations << TRANSLATIONS[1000]
  else
    translations << "#{translate_100_999(number)} #{pluralize(thousands, THOUSANDS)}"
  end

  number %= 1000
  hundreds = number/100
  translations << translate_0_999(number)

  translations.join(' ')
end

.translate_100_999(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 73

def self.translate_100_999(number)
  return TRANSLATIONS[number] if TRANSLATIONS.has_key? number

  hundreds = number/100
  translations = []
  translations << TRANSLATIONS[hundreds*100]

  tens_units = number%100
  if tens_units > 0
    translations << translate_0_99(tens_units)
  end

  translations.join(' ')
end

.translate_20_99(number) ⇒ Object 



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# File 'lib/polish_number.rb', line 62

def self.translate_20_99(number)
  return TRANSLATIONS[number] if TRANSLATIONS.has_key? number

  first, second = number.to_s.split(//).map { |c| c.to_i }
  "#{TRANSLATIONS[first*10]} #{TRANSLATIONS[second]}"
end

.translate_3_digit_number(number) ⇒ Object 



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

def self.translate_3_digit_number(number)
  unless (0..999) === number
    raise "#{number} not supported"
  end

  # handle simple numbers
  if TRANSLATIONS.has_key? number
    return TRANSLATIONS[number]
  end

  number_digits = number.to_s.split(//)

  last_2_digits =
  if number > 99
    number_digits[-2, 2]
  else
    number_digits
  end

  last_2_digits = last_2_digits.join.to_i
  last_2_translation = TRANSLATIONS[last_2_digits]

  translation_digits = []

  if last_2_translation
    translation_digits.unshift last_2_digits
    number /= 100
    position = 2
  else
    position = 0
  end

  while number != 0
    digit = number%10
    if digit > 0
      power = 10**position
      translation_digits.unshift digit*power
    end
    number /= 10
    position += 1
  end

  translation_digits
end