Class: Bakong::Khqr::MerchantCode::TimeStamp

Inherits:
TagLengthString show all
Defined in:
lib/bakong/khqr/merchant_code/time_stamp.rb

Overview

Tag “99”. Accepts a snake_case hash: { creation_timestamp:, expiration_timestamp: } where both are millisecond-precision Unix timestamps (13 digits).

Instance Attribute Summary

Attributes inherited from TagLengthString

#length, #tag, #value

Instance Method Summary collapse

Methods inherited from TagLengthString

#to_s

Constructor Details

#initialize(tag, timestamp, poi = nil) ⇒ TimeStamp

Returns a new instance of TimeStamp.



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# File 'lib/bakong/khqr/merchant_code/time_stamp.rb', line 15

def initialize(tag, timestamp, poi = nil)
  timestamp ||= {}
  creation_timestamp = (timestamp[:creation_timestamp] || 0).to_i
  expiration_timestamp = (timestamp[:expiration_timestamp] || 0).to_i

  if poi == EMV[:DYNAMIC_QR]
    if timestamp.empty? || expiration_timestamp.zero?
      raise Error.from(ERROR_CODES[:EXPIRATION_TIMESTAMP_REQUIRED])
    end

    if expiration_timestamp.to_s.length != EMV[:INVALID_LENGTH][:TIMESTAMP]
      raise Error.from(ERROR_CODES[:EXPIRATION_TIMESTAMP_LENGTH_INVALID])
    end

    begin
      Time.at(expiration_timestamp / 1000.0)
    rescue StandardError
      raise Error.from(ERROR_CODES[:INVALID_DYNAMIC_KHQR])
    end

    raise Error.from(ERROR_CODES[:EXPIRATION_TIMESTAMP_IN_THE_PAST]) if expiration_timestamp < creation_timestamp

    now_ms = (Time.now.to_f * 1000).to_i
    raise Error.from(ERROR_CODES[:KHQR_EXPIRED]) if expiration_timestamp < now_ms
  end

  string = +""
  created = TagLengthString.new(EMV[:CREATION_TIMESTAMP], creation_timestamp)
  string << created.to_s

  expired = TagLengthString.new(EMV[:EXPIRATION_TIMESTAMP], expiration_timestamp)
  string << expired.to_s

  super(tag, string)
end