markbates / mack-more

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Refactored out encryption into mack-encryption gem. [#28 state:resolved]
markbates (author)
Tue Aug 12 15:06:00 -0700 2008
commit  af4dac212e242b917ceaab5bec3233caa199295d
tree    d7ba99a3e8763621f795a405a5b1a62f3db3a41f
parent  84155097ab040c81f2a281989ba2d23d539fce0a
raw normal view history
af4dac21 » markbates 2008-08-12 Refactored out encryption i... 1 module Mack
2 module Utils
3 module Crypt
4 # A singleton class that holds/manages all the workers for the system.
5 #
6 # A worker must be defined as Mack::Utils::Crypt::<name>Worker and must
7 # define an encrypt(value) method and a decrypt(value) method.
8 #
9 # Example:
10 # class Mack::Utils::Crypt::ReverseWorker
11 # def encrypt(x)
12 # x.reverse
13 # end
14 #
15 # def decrypt(x)
16 # x.reverse
17 # end
18 # end
19 class Keeper
20 include Singleton
21
22 def initialize
23 @crypt_workers_cache = {}
24 end
25
26 # Returns a worker object to handle the encrytion/decryption.
27 # If the specified worker doesn't exist then Mack::Utils::Crypt::DefaultWorker
28 # is returned.
29 def worker(key = :default)
30 worker = @crypt_workers_cache[key.to_sym]
31 if worker.nil?
32 worker_klass = key.to_s.camelcase + "Worker"
33 if Mack::Utils::Crypt.const_defined?(worker_klass)
34 worker = "Mack::Utils::Crypt::#{worker_klass}".constantize.new
35 else
36 worker = Mack::Utils::Crypt::DefaultWorker.new
37 end
38 @crypt_workers_cache[key.to_sym] = worker
39 end
40 worker
41 end
42
43 end # Keeper
44 end # Crypt
45 end # Utils
46 end # Mack