Sha256: a0f18257aa35ca8e1ac82f784c66321bdfc5078e1dd74cdbb1c51610aab957e9
Contents?: true
Size: 893 Bytes
Versions: 16
Compression:
Stored size: 893 Bytes
Contents
module Tins
class Token < String
DEFAULT_ALPHABET = ((?0..?9).to_a + (?a..?z).to_a + (?A..?Z).to_a).freeze
#def initialize(bits: 128, length: nil, alphabet: DEFAULT_ALPHABET)
def initialize(options = {})
bits = options[:bits] || 128
length = options[:length]
alphabet = options[:alphabet] || DEFAULT_ALPHABET
alphabet.size > 1 or raise ArgumentError, 'need at least 2 symbols in alphabet'
if length
length > 0 or raise ArgumentError, 'length has to be positive'
else
bits > 0 or raise ArgumentError, 'bits has to be positive'
length = (Math.log(1 << bits) / Math.log(alphabet.size)).ceil
end
self.bits = (Math.log(alphabet.size ** length) / Math.log(2)).floor
token = ''
length.times { token << alphabet[rand(alphabet.size)] }
super token
end
attr_accessor :bits
end
end
Version data entries
16 entries across 15 versions & 3 rubygems