Class: Mortgagerb::Scenario

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(amount, rate, type) ⇒ Scenario

Returns a new instance of Scenario.



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# File 'lib/mortgagerb/scenario.rb', line 5

def initialize(amount, rate, type)
  @amount = amount
  @rate = rate
  @type = type
  @amortization_payment = nil
  @principal = nil
end

Instance Attribute Details

#amortization_payment ⇒ Object

Returns the value of attribute amortization_payment.



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# File 'lib/mortgagerb/scenario.rb', line 3

def amortization_payment
  @amortization_payment
end

#principal ⇒ Object

Returns the value of attribute principal.



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# File 'lib/mortgagerb/scenario.rb', line 3

def principal
  @principal
end

Instance Method Details

#calculate ⇒ Object 



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# File 'lib/mortgagerb/scenario.rb', line 13

def calculate
  if %i[thirty_year_fixed three_year_arm five_year_arm seven_year_arm ten_year_arm].include?(@type)
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(30)
    @amortization_payment = Calculator.periodic_amortization_payment(@amount, r, n)
  elsif %i[thirty_year_fixed_get_pricipal three_year_arm_get_principal five_year_arm_get_principal
           seven_year_arm_get_principal ten_year_arm_get_principal].include?(@type)
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(30)
    @principal = Calculator.principal_from_amortization_payment(@amount, r, n)
  elsif @type === :twenty_year_fixed
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(20)
    @amortization_payment = Calculator.periodic_amortization_payment(@amount, r, n)
  elsif @type === :twenty_year_fixed_get_principal
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(20)
    @principal = Calculator.principal_from_amortization_payment(@amount, r, n)
  elsif @type === :fifteen_year_fixed
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(15)
    @amortization_payment = Calculator.periodic_amortization_payment(@amount, r, n)
  elsif @type === :fifteen_year_fixed_get_principal
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(15)
    @principal = Calculator.principal_from_amortization_payment(@amount, r, n)
  elsif @type === :ten_year_fixed
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(10)
    @amortization_payment = Calculator.periodic_amortization_payment(@amount, r, n)
  elsif @type === :ten_year_fixed_get_principal
    r = Calculator.periodic_interest_rate(@rate)
    n = Calculator.total_number_of_payments(10)
    @principal = Calculator.principal_from_amortization_payment(@amount, r, n)
  end
end