Class: Nacha::AbaNumber

Inherits:
Object
  • Object
show all
Includes:
HasErrors
Defined in:
lib/nacha/aba_number.rb

Overview

Validates and formats an ABA routing number.

Instance Attribute Summary collapse

Attributes included from HasErrors

#errors

Instance Method Summary collapse

Methods included from HasErrors

#add_error, #has_errors?

Constructor Details

#initialize(routing_number) ⇒ AbaNumber

Returns a new instance of AbaNumber.



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# File 'lib/nacha/aba_number.rb', line 11

def initialize(routing_number)
  @errors = []
  @valid = nil
  @routing_number = routing_number.to_s.strip
end

Instance Attribute Details

#routing_number ⇒ Object

Returns the value of attribute routing_number.



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# File 'lib/nacha/aba_number.rb', line 7

def routing_number
  @routing_number
end

Instance Method Details

#add_check_digit ⇒ Object 



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# File 'lib/nacha/aba_number.rb', line 34

def add_check_digit
  @routing_number = @routing_number[0..7] + compute_check_digit
end

#check_digit ⇒ Object 



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# File 'lib/nacha/aba_number.rb', line 38

def check_digit
  check = @routing_number[8]
  return unless @routing_number.length == 9 && compute_check_digit == check

  check
end

#compute_check_digit ⇒ Object

:reek:FeatureEnvy



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# File 'lib/nacha/aba_number.rb', line 18

def compute_check_digit
  digit_array = @routing_number.ljust(8, '0').chars.collect(&:to_i)
  sum = (3 * (digit_array[0] + digit_array[3] + digit_array[6])) +
    (7 * (digit_array[1] + digit_array[4] + digit_array[7])) +
    (digit_array[2] + digit_array[5])

  intermediate = (sum % 10)
  intermediate.zero? ? '0' : (10 - intermediate).to_s
end

#to_s ⇒ Object 



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# File 'lib/nacha/aba_number.rb', line 80

def to_s
  @routing_number
end

#to_s_base ⇒ Object 



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# File 'lib/nacha/aba_number.rb', line 84

def to_s_base
  @routing_number[0..7]
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nacha/aba_number.rb', line 45

def valid?
  @valid ||= if valid_routing_number_length?
               if @routing_number.length == 9
                 valid_check_digit?
               else # 8 digits is valid
                 true
               end
             else
               false
             end
end

#valid_check_digit? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nacha/aba_number.rb', line 69

def valid_check_digit?
  check = @routing_number[8]
  if compute_check_digit != check
    add_error("Incorrect Check Digit \"#{check}\" should be " \
      "\"#{compute_check_digit}\"")
    false
  else
    true
  end
end

#valid_routing_number_length? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nacha/aba_number.rb', line 57

def valid_routing_number_length?
  actual_length = @routing_number.length

  if [9, 10].include?(actual_length)
    true
  else
    add_error("Routing number must be 8 or 9 digits long, but was " \
      "#{actual_length} digits long.")
    false
  end
end