Class: Finance::Amortization

Inherits:
Object
  • Object
show all
Defined in:
lib/rvgp/reconcilers/shorthand/finance_gem_hacks.rb

Overview

The default functionality in this class, specified in the finance gem, is overwritten, to support the additional_payments feature of RVGP::Reconcilers::Shorthand::Mortgage

Instance Method Summary collapse

Instance Method Details

#amortize(rate) ⇒ Object

This was copied out of : github.com/marksweston/finance/blob/master/lib/finance/amortization.rb Because bank of america doesn’t round the same way…



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# File 'lib/rvgp/reconcilers/shorthand/finance_gem_hacks.rb', line 14

def amortize(rate)
  # For the purposes of calculating a payment, the relevant time
  # period is the remaining number of periods in the loan, not
  # necessarily the duration of the rate itself.
  periods = @periods - @period
  amount = Finance::Amortization.payment @balance, rate.monthly, periods

  pmt = Finance::Payment.new amount, period: @period

  rate.duration.to_i.times do
    # NOTE: This is the only change I made:
    #       (well, I also removed the pmt based block.call above)
    @block&.call(@period, self)

    # Do this first in case the balance is zero already.
    break if @balance.zero?

    # Compute and record interest on the outstanding balance.
    int = (@balance * rate.monthly).round(2)

    interest = Finance::Interest.new int, period: @period

    @balance += interest.amount
    @transactions << interest.dup

    # Record payment.  Don't pay more than the outstanding balance.
    pmt.amount = -@balance if pmt.amount.abs > @balance
    @transactions << pmt.dup
    @balance += pmt.amount

    @period += 1
  end
end

#balance=(val) ⇒ Object 



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# File 'lib/rvgp/reconcilers/shorthand/finance_gem_hacks.rb', line 7

def balance=(val)
  @balance = DecNum.new val
end