Class: Bakong::Khqr::TagLengthString

Inherits:

Object

• Object
• Bakong::Khqr::TagLengthString

Defined in:

lib/bakong/khqr/tag_length_string.rb

Overview

EMVCo TLV primitive: a 2-char tag, 2-digit zero-padded length, and value. Length is the character count of the value (matches the JS upstream’s ‘String.length`, which counts UTF-16 code units — equivalent to Ruby’s ‘String#length` for any character in the BMP, which covers Khmer).

Direct Known Subclasses

MerchantCode::AccountInformation, MerchantCode::AcquiringBank, MerchantCode::AdditionalData, MerchantCode::BakongAccountID, MerchantCode::BillNumber, MerchantCode::CRC, MerchantCode::CountryCode, MerchantCode::GlobalUniqueIdentifier, MerchantCode::LanguagePreference, MerchantCode::MerchantCategoryCode, MerchantCode::MerchantCity, MerchantCode::MerchantCityAlternateLanguage, MerchantCode::MerchantId, MerchantCode::MerchantInformationLanguageTemplate, MerchantCode::MerchantName, MerchantCode::MerchantNameAlternateLanguage, MerchantCode::MobileNumber, MerchantCode::PayloadFormatIndicator, MerchantCode::PointOfInitiationMethod, MerchantCode::PurposeOfTransaction, MerchantCode::StoreLabel, MerchantCode::TerminalLabel, MerchantCode::TimeStamp, MerchantCode::TransactionAmount, MerchantCode::TransactionCurrency, MerchantCode::UnionpayMerchantAccount

Instance Attribute Summary

• #length ⇒ Object readonly

  Returns the value of attribute length.

• #tag ⇒ Object readonly

  Returns the value of attribute tag.

• #value ⇒ Object readonly

  Returns the value of attribute value.

Instance Method Summary

• #initialize(tag, value) ⇒ TagLengthString constructor

  A new instance of TagLengthString.

• #to_s ⇒ Object

Constructor Details

#initialize(tag, value) ⇒ TagLengthString

Returns a new instance of TagLengthString.

# File 'lib/bakong/khqr/tag_length_string.rb', line 12

def initialize(tag, value)
  @tag = tag
  @value = value
  len = value.to_s.length
  @length = len < 10 ? "0#{len}" : len.to_s
end

Instance Attribute Details

#length ⇒ Object (readonly)

Returns the value of attribute length.

# File 'lib/bakong/khqr/tag_length_string.rb', line 10

def length
  @length
end

#tag ⇒ Object (readonly)

Returns the value of attribute tag.

# File 'lib/bakong/khqr/tag_length_string.rb', line 10

def tag
  @tag
end

#value ⇒ Object (readonly)

Returns the value of attribute value.

# File 'lib/bakong/khqr/tag_length_string.rb', line 10

def value
  @value
end

Instance Method Details

#to_s ⇒ Object

# File 'lib/bakong/khqr/tag_length_string.rb', line 19

def to_s
  "#{@tag}#{@length}#{@value}"
end