Class: WireTransfer::StructuredCommunication

Inherits:
Object
  • Object
show all
Defined in:
lib/wire_transfer/structured_communication.rb

Constant Summary collapse

ALLOWED_NUMBERS = 
0..9999999999

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(number) ⇒ StructuredCommunication

Returns a new instance of StructuredCommunication.

Raises:



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# File 'lib/wire_transfer/structured_communication.rb', line 5

def initialize number
  @number = number
  raise InvalidNumberError unless ALLOWED_NUMBERS.include?(@number)
end

Class Method Details

.from_string(string) ⇒ Object

Raises:



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# File 'lib/wire_transfer/structured_communication.rb', line 10

def self.from_string(string)
  string = string.gsub(/[^\d]/, '')
  raise InvalidNumberError unless string.size == 12
  number             = string[0..9]
  control_characters = string[10..11]

  structured_communication = new(number.to_i)
  raise InvalidNumberError unless structured_communication.control_characters == control_characters
  structured_communication
end

Instance Method Details

#checksummed_padded_number ⇒ Object 



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# File 'lib/wire_transfer/structured_communication.rb', line 39

def checksummed_padded_number
  padded_number + control_characters
end

#control_characters ⇒ Object

Take the remainder of the euclidian division from the padded reference by 97 (modulo 97) and pad it with zeros if necessary unless this remainder is equal to 0, in that case, the control characters are replaced by 97.



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# File 'lib/wire_transfer/structured_communication.rb', line 29

def control_characters
  remainder = padded_number.to_i % 97

  if remainder > 0
    remainder.to_s.rjust(2, "0")
  else
    "97"
  end
end

#padded_number ⇒ Object 



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# File 'lib/wire_transfer/structured_communication.rb', line 21

def padded_number
  @number.to_s.rjust(10, "0")
end

#to_i ⇒ Object 



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# File 'lib/wire_transfer/structured_communication.rb', line 50

def to_i
  @number
end

#to_s ⇒ Object

Take a communication number and format it as it appears on a wire transfer.



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# File 'lib/wire_transfer/structured_communication.rb', line 44

def to_s
  communication_number = checksummed_padded_number.insert 3, "/"
  communication_number = communication_number.insert 8, "/"
  "+++#{communication_number}+++"
end