Class: ActiveUxid::Ulid

Inherits:
Base
  • Object
show all
Defined in:
lib/active_uxid/ulid.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#encoding_base, #initialize

Constructor Details

This class inherits a constructor from ActiveUxid::Base

Class Method Details

.encode ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 5

def self.encode
  klass = new
  klass.uxid_encode
end

Instance Method Details

#uxid_bytes ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 17

def uxid_bytes
  "#{uxid_unixtime_48bit}#{SecureRandom.random_bytes(10)}"
end

#uxid_encode ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 10

def uxid_encode
  (1..encoding_length).reduce('') do |str, num|
    shift = 128 - 5 * num
    "#{str}#{encoding_chars[(uxid_octect >> shift) & 0x1f]}"
  end
end

#uxid_octect ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 21

def uxid_octect
  (hi, lo) = uxid_bytes.unpack('Q>Q>')
  (hi << 64) | lo
end

#uxid_unixtime_48bit ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 30

def uxid_unixtime_48bit
  [uxid_unixtime_flex].pack('Q>')[2..-1]
end

#uxid_unixtime_flex ⇒ Object 



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# File 'lib/active_uxid/ulid.rb', line 26

def uxid_unixtime_flex
  (Time.current.to_f * 10_000).to_i
end