Class: Money

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

Constant Summary collapse

@@base_currency =

Set defaults

'EUR'
@@conversion_rates = 
{
  'EUR' => 1,
  'USD' => 1.11,
  'Bitcoin' => 0.0047
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(amount, currency) ⇒ Money

Constructor



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

def initialize(amount, currency)
  @amount = amount.to_f
  @currency = currency
end

Instance Attribute Details

#amount ⇒ Object

Returns the value of attribute amount.



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# File 'lib/money.rb', line 2

def amount
  @amount
end

#currency ⇒ Object

Returns the value of attribute currency.



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# File 'lib/money.rb', line 2

def currency
  @currency
end

Class Method Details

.conversion_rates(base_currency, conversion_rates) ⇒ Object 



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# File 'lib/money.rb', line 18

def self.conversion_rates(base_currency, conversion_rates)
  @@base_currency = base_currency
  @@conversion_rates = conversion_rates
end

.getRate(from_currency, to_currency) ⇒ Object 



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# File 'lib/money.rb', line 83

def self.getRate(from_currency, to_currency)
  return 1 if to_currency == from_currency

  if !@@conversion_rates[to_currency].nil? && from_currency == @@base_currency
    return @@conversion_rates[to_currency]
  end

  if !@@conversion_rates[from_currency].nil? && to_currency == @@base_currency
    return 1.0 / @@conversion_rates[from_currency]
  end
end

Instance Method Details

#*(number) ⇒ Object 



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# File 'lib/money.rb', line 51

def *(number)
  Money.new(self.amount * number.to_f, self.currency)
end

#+(other) ⇒ Object 



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# File 'lib/money.rb', line 43

def +(other)
  Money.new(self.amount + other_amount(other), self.currency)
end

#-(other) ⇒ Object 



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

def -(other)
  Money.new(self.amount - other_amount(other), self.currency)
end

#/(number) ⇒ Object 



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# File 'lib/money.rb', line 55

def /(number)
  Money.new(self.amount / number.to_f, self.currency)
end

#<(other) ⇒ Object 



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# File 'lib/money.rb', line 70

def <(other)
  temp = other.convert_to(self.currency)
  self.amount.round(2) < temp.amount.round(2)
end

#==(other) ⇒ Object

Comparisons



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# File 'lib/money.rb', line 60

def ==(other)
  temp = other.convert_to(self.currency)
  self.amount.round(2) == temp.amount.round(2)
end

#>(other) ⇒ Object 



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# File 'lib/money.rb', line 65

def >(other)
  temp = other.convert_to(self.currency)
  self.amount.round(2) > temp.amount.round(2)
end

#convert_to(to_currency) ⇒ Object

Convert method



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# File 'lib/money.rb', line 24

def convert_to(to_currency)
  if @@conversion_rates[to_currency].nil?
    puts 'Rate not found'
  else
    from_currency = self.currency
    rate = Money.getRate(from_currency, to_currency)
  
    converted_amount = self.amount * rate

    Money.new(converted_amount, to_currency)
  end
end

#inspect ⇒ Object 



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# File 'lib/money.rb', line 75

def inspect
  sprintf('%.2f %s', amount, currency)
end

#other_amount(other) ⇒ Object

Arithmetics



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# File 'lib/money.rb', line 38

def other_amount(other)
  rate = Money.getRate(other.currency, self.currency)
  other.amount * rate
end

#to_s ⇒ Object 



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# File 'lib/money.rb', line 79

def to_s
  sprintf('%.2f %s', amount, currency)
end