Class: EzCrypter::Keeper

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/ezcrypter/keeper.rb

Overview

A singleton class that holds/manages all the workers for the system.

A worker must be defined as EzCrypter::<name>Worker and must define an ez_encrypt(value) method and a ez_decrypt(value) method.

Example:

class EzCrypter::ReverseWorker
  def ez_encrypt(x)
    x.reverse
  end

  def ez_decrypt(x)
    x.reverse
  end
end

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Keeper

Returns a new instance of Keeper.



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# File 'lib/ezcrypter/keeper.rb', line 20

def initialize
  @crypt_workers_cache = {}
end

Instance Method Details

#worker(key = :default, options = {}) ⇒ Object

Returns a worker object to handle the encrytion/decryption. If the specified worker doesn’t exist then EzCrypter::DefaultWorker is returned.



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# File 'lib/ezcrypter/keeper.rb', line 27

def worker(key = :default, options = {})
  # Needs poor man's camelcase
  if key.is_a?(Symbol)
    key = key.to_s
    key[0,1] = key[0,1].upcase
  end
  worker = @crypt_workers_cache[key.to_sym]
  if worker.nil?
    worker_klass = key + "Worker"
    if EzCrypter.const_defined?(worker_klass)
      worker = nil
      worker = eval("worker = EzCrypter::#{worker_klass}.new(options)")
      # puts "worker class inst #{worker.class.name}"
    else
      worker = EzCrypter::DefaultWorker.new(options)
      # puts "worker class inst defaulted to #{worker.class.name}"
    end
    @crypt_workers_cache[key.to_sym] = worker
  end
  worker
end