Module: GoldRecord::UUID

Defined in:
lib/gold_record/uuid.rb

Class Method Summary collapse

Class Method Details

.coerce(value) ⇒ Object 



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# File 'lib/gold_record/uuid.rb', line 14

def self.coerce(value)
  return nil unless value.kind_of?(String)
  if value.size == 22
    value = urlsafe_decode64(value)
  elsif value.size == 32 || value.size == 36
    value = decode_hex(value)
  end
  value = nil unless value.size == 16
  value
end

.decode_hex(str) ⇒ Object 



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# File 'lib/gold_record/uuid.rb', line 29

def self.decode_hex(str)
  [str.delete("-")].pack("H*")
end

.encode_hex(bin) ⇒ Object 



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# File 'lib/gold_record/uuid.rb', line 25

def self.encode_hex(bin)
  bin.unpack("H*").first
end

.random_generate ⇒ Object 



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# File 'lib/gold_record/uuid.rb', line 3

def self.random_generate
  bin = SecureRandom.random_bytes(16)
  # Set version 4
  bin[6] &= 0b01001111
  bin[6] |= 0b01000000
  # Set reserved bits
  bin[8] &= 0b10111111
  bin[8] |= 0b10000000
  bin
end

.urlsafe_decode64(str) ⇒ Object 



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# File 'lib/gold_record/uuid.rb', line 41

def self.urlsafe_decode64(str)
  "#{str.tr("-_", "+/")}===".unpack("m").first
end

.urlsafe_encode64(bin) ⇒ Object

Slightly modified backport from Ruby 1.9 www.ruby-doc.org/ruby-1.9/classes/Base64.html Strips padding char (=) and newlines from end of encoded string.



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# File 'lib/gold_record/uuid.rb', line 37

def self.urlsafe_encode64(bin)
  [bin].pack("m").tr("+/=", "-_ ").strip.delete("\n")
end