Class: TwitterCldr::DataReaders::NumberDataReader

Inherits:
DataReader
  • Object
show all
Defined in:
lib/twitter_cldr/data_readers/number_data_reader.rb

Constant Summary collapse

PluralRules = 
TwitterCldr::Formatters::Plurals::Rules
DEFAULT_NUMBER_SYSTEM = 
:default
ABBREVIATED_MIN_POWER = 
3
ABBREVIATED_MAX_POWER = 
14
NUMBER_MIN = 
10 ** ABBREVIATED_MIN_POWER
NUMBER_MAX = 
10 ** (ABBREVIATED_MAX_POWER + 1)
PATTERN_PATH = 
[:numbers, :formats]
SYMBOL_PATH = 
[:numbers, :symbols]
TYPES = 
[:default, :decimal, :currency, :percent]
FORMATS = 
[:long, :short, :default]
DEFAULT_TYPE = 
:decimal
DEFAULT_FORMAT = 
:default
DEFAULT_SIGN = 
:positive
FORMATTERS = 
{
  decimal: TwitterCldr::Formatters::DecimalFormatter,
  currency: TwitterCldr::Formatters::CurrencyFormatter,
  percent: TwitterCldr::Formatters::PercentFormatter
}

Instance Attribute Summary collapse

Attributes inherited from DataReader

#locale

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from DataReader

#pattern_at_path

Constructor Details

#initialize(locale, options = {}) ⇒ NumberDataReader

Returns a new instance of NumberDataReader.



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 41

def initialize(locale, options = {})
  super(locale)
  @type = options[:type] || DEFAULT_TYPE

  unless type && TYPES.include?(type.to_sym)
    raise ArgumentError.new("Type #{type} is not supported")
  end

  @format = options[:format] || DEFAULT_FORMAT
  @number_system = options[:number_system] || default_number_system
end

Instance Attribute Details

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 35

def format
  @format
end

#number_system ⇒ Object (readonly)

Returns the value of attribute number_system.



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 35

def number_system
  @number_system
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 35

def type
  @type
end

Class Method Details

.types ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 37

def self.types
  TYPES
end

Instance Method Details

#default_number_system ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 95

def default_number_system
  @default_number_system ||= resource[:numbers][:default_number_systems][:default].to_sym
end

#format_number(number, options = {}) ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 53

def format_number(number, options = {})
  precision = options[:precision] || 0
  pattern_for_number = pattern(number, precision == 0)
  options[:locale] = self.locale
  tokens = tokenizer.tokenize(pattern_for_number)
  formatter.format(tokens, number, options)
end

#formatter ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 91

def formatter
  @formatter ||= FORMATTERS[type].new(self)
end

#pattern(number, decimal = true) ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 61

def pattern(number, decimal = true)
  zeroes = number.to_i.abs.to_s.size - 1
  magnitude = "1#{'0' * zeroes}"
  truncated_num = formatter.truncate_number(number, zeroes % 3 + 1)
  truncated_num = truncated_num.to_i if decimal
  plural_rule = PluralRules.rule_for(truncated_num, locale)

  path = PATTERN_PATH + [
    type,
    number_system,
    [format, :default],
    magnitude.to_sym,
    [plural_rule, :other]
  ]

  sign = number < 0 ? :negative : :positive

  pattern_for_sign(
    traverse_finding_best_fit(path, []), sign
  )
end

#pattern_for_sign(pattern, sign) ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 99

def pattern_for_sign(pattern, sign)
  if pattern.include?(";")
    positive, negative = pattern.split(";")
    sign == :positive ? positive : negative
  else
    case sign
      when :negative
        "#{symbols[:minus_sign] || '-'}#{pattern}"
      else
        pattern
    end
  end
end

#symbols ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 83

def symbols
  @symbols ||= traverse_following_aliases(SYMBOL_PATH + [number_system])
end

#tokenizer ⇒ Object 



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# File 'lib/twitter_cldr/data_readers/number_data_reader.rb', line 87

def tokenizer
  @tokenizer ||= TwitterCldr::Tokenizers::NumberTokenizer.new(self)
end