Class: Tilia::VObject::UuidUtil

Inherits:
Object
  • Object
show all
Defined in:
lib/tilia/v_object/uuid_util.rb

Overview

UUID Utility.

This class has static methods to generate and validate UUID’s. UUIDs are used a decent amount within various *DAV standards, so it made sense to include it.

Class Method Summary collapse

Class Method Details

.uuid ⇒ String

Returns a pseudo-random v4 UUID.

This function is based on a comment by Andrew Moore on php.net

Returns:

  • (String)

See Also:



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# File 'lib/tilia/v_object/uuid_util.rb', line 16

def self.uuid
  format(
    '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
    # 32 bits for "time_low"
    rand(0..0xffff),
    rand(0..0xffff),

    # 16 bits for "time_mid"
    rand(0..0xffff),

    # 16 bits for "time_hi_and_version",
    # four most significant bits holds version number 4
    rand(0..0x0fff) | 0x4000,

    # 16 bits, 8 bits for "clk_seq_hi_res",
    # 8 bits for "clk_seq_low",
    # two most significant bits holds zero and one for variant DCE1.1
    rand(0..0x3fff) | 0x8000,

    # 48 bits for "node"
    rand(0..0xffff),
    rand(0..0xffff),
    rand(0..0xffff)
  )
end

.validate_uuid(uuid) ⇒ Boolean

Checks if a string is a valid UUID.

Parameters:

  • $uuid (String)

Returns:

  • (Boolean) 


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# File 'lib/tilia/v_object/uuid_util.rb', line 46

def self.validate_uuid(uuid)
  uuid =~ /^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/i
end