class Monefy

Monefy instance with two attr_reader

@attr_reader amount [Float] is the quantiy of a currency. @attr_reader currency [String] is the string correspondent to the currency.

Constants

VERSION

Attributes

amount[R]

currency[R]

Public Class Methods

conversion_rates(main_currency, other_currencies) click to toggle source

Set default currencies and conversion rates used to calculate conversions.

Use this method on your initilizer application config

@param main_currency [String] main currency. @param other_currencies [Hash] currencies relatives to main currency with key with other currency and value with conversion rate.

@return [Hash] all currencies conversion rate.

@example

Monefy.conversion_rates('EUR', {
  'USD'     => 1.11,
  'Bitcoin' => 0.0047
}) # => {"USD"=>1.11, "Bitcoin"=>0.0047, "EUR"=>1}

# File lib/monefy.rb, line 55
def self.conversion_rates(main_currency, other_currencies)
  @@currencies_rates = other_currencies.merge({ main_currency => 1 })
end

new(amount, currency) click to toggle source

To create a new instance, pass amout and current as parameters

@param amount [Integer, Float] quantiy of a currency. @param currency [String] currency key created on `conversion_rates` method.

@return [Monefy] all currencies conversion rate.

@example

Monefy.new(50, 'EUR') # => #<Monefy:0x... @amount=50.0, @currency="EUR">

See 'self.conversion_rates' methdo before initializa a new instance

# File lib/monefy.rb, line 28
def initialize(amount, currency)
  validate_currencies_rates
  validate_currency(currency)

  @amount = amount.round(2)
  @currency = currency

  self
end

Public Instance Methods

to_s() click to toggle source

Return Monefy instance string value

@return [String] currency and amout string.

@example

Monefy.new(50, 'EUR').to_s # => "50.00 EUR"
"#{Monefy.new(50, 'EUR')}" # => "50.00 EUR"

# File lib/monefy.rb, line 66
def to_s
  "#{'%.02f' % amount} #{currency}"
end

Private Instance Methods

create_new_instace(new_amount, new_currency) click to toggle source

# File lib/monefy.rb, line 94
def create_new_instace(new_amount, new_currency)
  self.class.new(new_amount, new_currency)
end

currencies_rates() click to toggle source

# File lib/monefy.rb, line 90
def currencies_rates
  @@currencies_rates
end

validate_currencies_rates() click to toggle source

# File lib/monefy.rb, line 72
def validate_currencies_rates
  return if defined?(@@currencies_rates) && @@currencies_rates.present?

  raise StandardError, "No conversion rates set"
end

validate_currency(currency) click to toggle source

# File lib/monefy.rb, line 78
def validate_currency(currency)
  return if @@currencies_rates.key? currency

  raise StandardError, "Invalid currency"
end

validate_monefy_instance(monefy) click to toggle source

# File lib/monefy.rb, line 84
def validate_monefy_instance(monefy)
  return if monefy.instance_of? Monefy

  raise StandardError, "Not a Monefy instance"
end