Class: Formatting::FormatNumber

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

Instance Method Summary collapse

Constructor Details

#initialize(input_number, opts) ⇒ FormatNumber

Returns a new instance of FormatNumber.



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# File 'lib/formatting/number.rb', line 15

def initialize(input_number, opts)
  @input_number = input_number

  @thousands_separator = opts.fetch(:thousands_separator) { default_thousands_separator }
  @decimal_separator   = opts.fetch(:decimal_separator) { default_decimal_separator }
  @round           = opts.fetch(:round, 2)
  @min_decimals    = opts.fetch(:min_decimals, 2)
  @explicit_sign   = opts.fetch(:explicit_sign, false)
  @blank_when_zero = opts.fetch(:blank_when_zero, false)
end

Instance Method Details

#format ⇒ Object 



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# File 'lib/formatting/number.rb', line 26

def format
  number = input_number

  has_decimals = number.to_s.include?(".")

  if blank_when_zero
    return "" if number.zero?
  end

  # Avoid negative zero.
  number = 0 if number.zero?

  if round
    number = number.round(round) if has_decimals
  end

  integer, decimals = number.to_s.split(".")

  # Separate groups by thousands separator.
  integer.gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{thousands_separator}")

  if explicit_sign
    integer = "+#{integer}" if number > 0
  end

  if min_decimals
    decimals ||= "0"
    decimals = decimals.ljust(min_decimals, "0")
  end

  [integer, decimals].compact.join(decimal_separator)
end