valid_loan_product_implementation

gistfile1.rb

def is_valid_loan_product(method)
    loan_attr    = self.send(method)
    return [false, "No #{method} specified"] if not loan_attr or loan_attr===""
    return [false, "No loan product chosen"] unless self.loan_product
    product = self.loan_product
    #Checking if the loan adheres to minimum and maximums of the loan product
    {:min => :minimum, :max => :maximum}.each{|k, v|
      product_attr = product.send("#{k}_#{method}")
      if method==:interest_rate
        product_attr = product_attr.to_f/100.round(6)
        loan_attr    = loan_attr.to_f.round(6)
      end

      if k==:min and loan_attr and product_attr and (product_attr - loan_attr > 0.000001)
        return [false, "#{v.to_s.capitalize} #{method.to_s.humanize} limit violated"]
      elsif k==:max and loan_attr and product_attr and  (loan_attr - product_attr > 0.000001)
       return  [false, "#{v.to_s.capitalize} #{method.to_s.humanize} limit violated"]
      end
    }
    #check if loan is follows the minimum discrete value for amount and interest
    if product.respond_to?("#{method}_multiple")
      product_attr = product.send("#{method}_multiple")
      loan_attr = loan_attr*100 if method==:interest_rate
      remainder = loan_attr.remainder(product_attr)
      remainder = remainder/100 if method==:interest_rate
      return  [false, "#{method.to_s.capitalize} should be in multiples of #{product_attr}"]  if not loan_attr or remainder > EPSILON
    end
    return true
  end