Contents

# frozen_string_literal: true

module Lite
  module Uxid
    class Ulid < Base::Irreversible

      MASK = 0x1f

      def encode
        oct = octect
        ele = "0" * coder_size
        pos = coder_size - 1

        while oct.positive?
          ele[pos] = coder_charset[oct & MASK]
          oct >>= 5
          pos -= 1
        end

        ele
      end

      private

      def bytes
        "#{unixtime_48bit}#{SecureRandom.random_bytes(10)}"
      end

      def octect
        (hi, lo) = bytes.unpack("Q>Q>")
        (hi << 64) | lo
      end

      def unixtime_ms
        time = Time.respond_to?(:current) ? Time.current : Time.now
        time.to_i * 1_000
      end

      def unixtime_48bit
        [unixtime_ms].pack("Q>")[2..-1]
      end

    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
lite-uxid-1.5.2	lib/lite/uxid/ulid.rb
lite-uxid-1.5.1	lib/lite/uxid/ulid.rb
lite-uxid-1.5.0	lib/lite/uxid/ulid.rb