Class: SpreadsheetLoanGenerator::Loan

Inherits:
Object
  • Object
show all
Defined in:
lib/spreadsheet_loan_generator/loan.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(amount:, duration:, period_duration:, rate:, due_on:, deferred_and_capitalized:, deferred:, type:, interests_type:, starting_capitalized_interests:) ⇒ Loan

Returns a new instance of Loan.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 14

def initialize(
  amount:,
  duration:,
  period_duration:,
  rate:,
  due_on:,
  deferred_and_capitalized:,
  deferred:,
  type:,
  interests_type:,
  starting_capitalized_interests:)
  @amount = amount.to_f
  @duration = duration.to_i
  @period_duration = period_duration.to_i
  @rate = rate.to_f
  @due_on = due_on.is_a?(Date) ? due_on : Date.parse(due_on)
  @deferred_and_capitalized = deferred_and_capitalized.to_i
  @deferred = deferred.to_i
  @type = type
  @interests_type = interests_type

  @starting_capitalized_interests = starting_capitalized_interests.to_f

  print_validation_errors
end

Instance Attribute Details

#amount ⇒ Object

Returns the value of attribute amount.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def amount
  @amount
end

#deferred ⇒ Object

Returns the value of attribute deferred.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def deferred
  @deferred
end

#deferred_and_capitalized ⇒ Object

Returns the value of attribute deferred_and_capitalized.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def deferred_and_capitalized
  @deferred_and_capitalized
end

#due_on ⇒ Object

Returns the value of attribute due_on.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def due_on
  @due_on
end

#duration ⇒ Object

Returns the value of attribute duration.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def duration
  @duration
end

#interests_type ⇒ Object

Returns the value of attribute interests_type.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def interests_type
  @interests_type
end

#period_duration ⇒ Object

Returns the value of attribute period_duration.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def period_duration
  @period_duration
end

#rate ⇒ Object

Returns the value of attribute rate.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def rate
  @rate
end

#starting_capitalized_interests ⇒ Object

Returns the value of attribute starting_capitalized_interests.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def starting_capitalized_interests
  @starting_capitalized_interests
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 3

def type
  @type
end

Instance Method Details

#bullet? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spreadsheet_loan_generator/loan.rb', line 106

def bullet?
  fully_deferred? && deferred_and_capitalized == total_deferred_duration
end

#fully_deferred? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spreadsheet_loan_generator/loan.rb', line 102

def fully_deferred?
  duration > 1 && non_deferred_duration == 1
end

#in_fine? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spreadsheet_loan_generator/loan.rb', line 110

def in_fine?
  fully_deferred? && deferred == total_deferred_duration
end

#interests_formula ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 52

def interests_formula
  "SpreadsheetLoanGenerator::#{interests_type.classify}Interests".constantize.new(loan: self)
end

#loan_type_formula ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 48

def loan_type_formula
  "SpreadsheetLoanGenerator::#{type.classify}".constantize.new(loan: self)
end

#name ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 86

def name
  args = []
  args += ['realistic'] if interests_type == 'realistic'
  args += [
    name_type,
    name_period_duration,
    amount,
    (rate * 100).to_s,
    duration.to_s,
    name_deferred,
    name_due_on
  ]

  args.join('_')
end

#name_deferred ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 76

def name_deferred
  return '0' if fully_deferred?

  total_deferred_duration
end

#name_due_on ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 82

def name_due_on
  due_on.strftime('%Y%m%d')
end

#name_period_duration ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 63

def name_period_duration
  if period_duration.in?([1, 3, 6, 12])
    {
      '1' => 'month',
      '3' => 'quarter',
      '6' => 'semester',
      '12' => 'year'
    }[period_duration.to_s]
  else
    period_duration.to_s
  end
end

#name_type ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 56

def name_type
  return 'bullet' if bullet?
  return 'in_fine' if in_fine?

  type
end

#non_deferred_duration ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 114

def non_deferred_duration
  duration - total_deferred_duration
end

#print_validation_errors ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 40

def print_validation_errors
  puts 'amount < 0' if amount < 0
  puts 'deferred & deferred_and_capitalized >= duration' if total_deferred_duration >= duration
  if type == 'standard' && interests_type == 'realistic' && !fully_deferred?
    puts 'standard & realistic interests do not work together'
  end
end

#total_deferred_duration ⇒ Object 



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# File 'lib/spreadsheet_loan_generator/loan.rb', line 118

def total_deferred_duration
  deferred_and_capitalized + deferred
end