lib/money/money.rb in ShadowBelmolve-money-2.3.3 vs lib/money/money.rb in ShadowBelmolve-money-2.3.4

@@ -82,11 +82,12 @@
     @bank = bank || Money.default_bank
   end
 
   # Do two money objects equal? Only works if both objects are of the same currency
   def ==(other_money)
-    cents == other_money.cents && bank.same_currency?(currency, other_money.currency)
+    other_money.respond_to?(:cents) && cents == other_money.cents &&
+      other_money.respond_to?(:currency) && bank.same_currency?(currency, other_money.currency)
   end
 
   def <=>(other_money)
     if bank.same_currency?(currency, other_money.currency)
       cents <=> other_money.cents
@@ -147,10 +148,44 @@
   # Calculate self + simple interest
   def simple_interest(rate, count = 1, period = 12)
     Money.new(rate / 100 / period * cents * count)
   end
 
+  #Round to nearest coin value
+  #  basically, we don't have coins for cents in CZK, 
+  #  our smallest fraction is 0.50CZK
+  #
+  #Money.new(14_58).round_to_coin(50) => 14.50
+  def round_to_coin(coin)
+    coef = 1.0/coin
+    val = (cents * coef).round / coef
+    Money.new(val, currency)
+  end
+
+  #Returns array a where
+  # a[0] is price _after_ applying tax (tax base)
+  # a[1] is tax
+  def tax_brakedown(tax)
+    _tax = (cents * (tax / 100.0)).round
+    [Money.new(cents + _tax, currency), Money.new(_tax, currency)]
+  end
+
+  #Returns array a where
+  # a[0] is price _before_ applying tax (tax base)
+  # a[1] is tax
+  def tax_reverse_brakedown(tax)
+    coef = tax/100.0
+    [Money.new((cents / (1+coef)).round, currency), 
+     Money.new((cents*coef/(1+coef)).round, currency) ]
+  end
+  
+  # Just a helper if you got tax inputs in percentage.
+  # Ie. add_tax(20) =>  cents * 1.20
+  def add_tax(tax)
+    tax_brakedown(tax)[0]
+  end
+
   # Split money in number of installments
   #
   # Money.new(10_00).split_in_installments(3)
   # => [ 3.34, 3.33, 3.33 ]  (All Money instances)
   #
@@ -167,15 +202,9 @@
   # Money.new(1000_00).split_in_installments(Money.new(300_00))
   # => [ 334_00, 333_00, 333_00 ]  (All Money instances)
   #
   def in_installments_of(other_money, order=false)
     split_in_installments(cents/other_money.cents, order)
-  end
-
-  # Just a helper if you got tax inputs in percentage.
-  # Ie. add_tax(20) =>  cents * 1.20
-  def add_tax(tax)
-    Money.new(cents + cents / 100 * tax)
   end
 
   # Format the price according to several rules
   # Currently supported are :with_currency, :no_cents, :symbol and :html
   #