Class: Zold::Amount

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

Overview

Amount

Constant Summary collapse

ZERO = 
Amount.new(coins: 0)

Instance Method Summary collapse

Constructor Details

#initialize(coins: nil, zld: nil) ⇒ Amount

Returns a new instance of Amount.



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# File 'lib/zold/amount.rb', line 30

def initialize(coins: nil, zld: nil)
  raise 'You can\'t specify both coints and zld' if !coins.nil? && !zld.nil?
  @coins = coins unless coins.nil?
  @coins = (zld * 2**24).to_i unless zld.nil?
  raise "Integer is required: #{@coins.class}" unless @coins.is_a?(Integer)
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/zold/amount.rb', line 60

def +(other)
  Amount.new(coins: @coins + other.to_i)
end

#==(other) ⇒ Object 



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# File 'lib/zold/amount.rb', line 56

def ==(other)
  @coins == other.to_i
end

#mul(m) ⇒ Object 



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# File 'lib/zold/amount.rb', line 72

def mul(m)
  c = @coins * m
  raise "Overflow, can't multiply #{@coins} by #{m}" if c > 2**63
  Amount.new(coins: c)
end

#negative? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/amount.rb', line 68

def negative?
  @coins < 0
end

#to_i ⇒ Object 



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# File 'lib/zold/amount.rb', line 39

def to_i
  @coins
end

#to_s ⇒ Object 



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# File 'lib/zold/amount.rb', line 47

def to_s
  text = "#{to_zld}ZLD"
  if negative?
    Rainbow(text).red
  else
    Rainbow(text).green
  end
end

#to_zld ⇒ Object 



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# File 'lib/zold/amount.rb', line 43

def to_zld
  format('%0.2f', @coins.to_f / 2**24)
end

#zero? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/amount.rb', line 64

def zero?
  @coins.zero?
end