Module: Monetize

Defined in:
lib/monetize.rb,
lib/monetize/version.rb

Constant Summary collapse

VERSION = 
"0.3.0"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.assume_from_symbol ⇒ Object

Returns the value of attribute assume_from_symbol.



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# File 'lib/monetize.rb', line 13

def assume_from_symbol
  @assume_from_symbol
end

Class Method Details

.extract_cents(input, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 71

def self.extract_cents(input, currency = Money.default_currency)
  num = input.gsub(/[^\d.,'-]/, '')

  negative = num =~ /^-|-$/ ? true : false

  decimal_char = currency.decimal_mark

  num = num.sub(/^-|-$/, '') if negative

  if num.include?('-')
    raise ArgumentError, "Invalid currency amount (hyphen)"
  end

  num.chop! if num.match(/[\.|,]$/)

  used_delimiters = num.scan(/[^\d]/)

  case used_delimiters.uniq.length
  when 0
    major, minor = num, 0
  when 2
    thousands_separator, decimal_mark = used_delimiters.uniq

    major, minor = num.gsub(thousands_separator, '').split(decimal_mark)
    min = 0 unless min
  when 1
    decimal_mark = used_delimiters.first

    if decimal_char == decimal_mark
      major, minor = num.split(decimal_char)
    else
      if num.scan(decimal_mark).length > 1 # multiple matches; treat as decimal_mark
        major, minor = num.gsub(decimal_mark, ''), 0
      else
        possible_major, possible_minor = num.split(decimal_mark)
        possible_major ||= "0"
        possible_minor ||= "00"

        if possible_minor.length != 3 # thousands_separator
          major, minor = possible_major, possible_minor
        else
          if possible_major.length > 3
            major, minor = possible_major, possible_minor
          else
            if decimal_mark == '.'
              major, minor = possible_major, possible_minor
            else
              major, minor = "#{possible_major}#{possible_minor}", 0
            end
          end
        end
      end
    end
  else
    raise ArgumentError, "Invalid currency amount"
  end

  cents = major.to_i * currency.subunit_to_unit
  minor = minor.to_s
  minor = if minor.size < currency.decimal_places
            (minor + ("0" * currency.decimal_places))[0,currency.decimal_places].to_i
          elsif minor.size > currency.decimal_places
            if minor[currency.decimal_places,1].to_i >= 5
              minor[0,currency.decimal_places].to_i+1
            else
              minor[0,currency.decimal_places].to_i
            end
          else
            minor.to_i
          end

  cents += minor

  negative ? cents * -1 : cents
end

.from_bigdecimal(value, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 52

def self.from_bigdecimal(value, currency = Money.default_currency)
  currency = Money::Currency.wrap(currency)
  value = value * currency.subunit_to_unit
  value = value.round unless Money.infinite_precision
  Money.new(value, currency)
end

.from_fixnum(value, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 41

def self.from_fixnum(value, currency = Money.default_currency)
  currency = Money::Currency.wrap(currency)
  value = value * currency.subunit_to_unit
  Money.new(value, currency)
end

.from_float(value, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 47

def self.from_float(value, currency = Money.default_currency)
  value = BigDecimal.new(value.to_s)
  from_bigdecimal(value, currency)
end

.from_numeric(value, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 59

def self.from_numeric(value, currency = Money.default_currency)
  case value
  when Fixnum
    from_fixnum(value, currency)
  when Numeric
    value = BigDecimal.new(value.to_s)
    from_bigdecimal(value, currency)
  else
    raise ArgumentError, "'value' should be a type of Numeric"
  end
end

.from_string(value, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 36

def self.from_string(value, currency = Money.default_currency)
  value = BigDecimal.new(value.to_s)
  from_bigdecimal(value, currency)
end

.parse(input, currency = Money.default_currency) ⇒ Object 



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# File 'lib/monetize.rb', line 16

def self.parse(input, currency = Money.default_currency)
  input = input.to_s.strip

  computed_currency = if assume_from_symbol && input =~ /^(\$|€|£)/
                        case input
                        when /^\$/ then "USD"
                        when /^€/ then "EUR"
                        when /^£/ then "GBP"
                        end
                      else
                        input[/[A-Z]{2,3}/]
                      end

  currency = computed_currency || currency || Money.default_currency
  currency = Money::Currency.wrap(currency)

  fractional = extract_cents(input, currency)
  Money.new(fractional, currency)
end