Module: Subledger::UUID

Defined in:
lib/subledger/uuid.rb

Constant Summary collapse

SPACE = 
62 ** 22
CHARS = 
('0'..'9').to_a + ('a'..'z').to_a + ('A'..'Z').to_a
VALID = 
/^[0-9A-Za-z]{22}$/

Class Method Summary collapse

Class Method Details

.as_bignum ⇒ Object 



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# File 'lib/subledger/uuid.rb', line 24

def self.as_bignum
  SecureRandom.random_number SPACE
end

.as_string ⇒ Object 



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# File 'lib/subledger/uuid.rb', line 20

def self.as_string
  to_string as_bignum
end

.invalid?(uuid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/subledger/uuid.rb', line 16

def self.invalid? uuid
  uuid.nil? or uuid !~ VALID
end

.to_bignum(uuid) ⇒ Object 



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# File 'lib/subledger/uuid.rb', line 39

def self.to_bignum uuid
  bignum = 0

  power = 0

  uuid.split('').reverse.each do |character|
    bignum += CHARS.index( character ) * ( 62 ** power )
    power += 1
  end

  bignum
end

.to_string(bignum) ⇒ Object 



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# File 'lib/subledger/uuid.rb', line 28

def self.to_string bignum
  base_62 = ''

  22.times do
    base_62 << CHARS[ bignum.modulo 62 ]
    bignum /= 62
  end

  base_62.reverse
end

.valid?(uuid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/subledger/uuid.rb', line 12

def self.valid? uuid
  !uuid.nil? and uuid =~ VALID
end