Add StateMachine object and StateMachineFactory

Supports initial state in SM

lib/aasm.rb

@@ -1,5 +1,6 @@
 require File.join(File.dirname(__FILE__), 'event')
 require File.join(File.dirname(__FILE__), 'state')
+require File.join(File.dirname(__FILE__), 'state_machine')
 require File.join(File.dirname(__FILE__), 'persistence')
 
 module AASM
@@ -9,19 +10,20 @@ module AASM
   def self.included(base) #:nodoc:
     base.extend AASM::ClassMethods
     AASM::Persistence.set_persistence(base)
+    AASM::StateMachineFactory[base] = AASM::StateMachine.new('')
   end
 
   module ClassMethods
     def aasm_initial_state(set_state=nil)
       if set_state
-        aasm_initial_state = set_state
+        AASM::StateMachineFactory[self].initial_state = set_state
       else
-        @aasm_initial_state
+        AASM::StateMachineFactory[self].initial_state
       end
     end
     
     def aasm_initial_state=(state)
-      @aasm_initial_state = state
+      AASM::StateMachineFactory[self].initial_state = state
     end
     
     def aasm_state(name, options={})

lib/state_machine.rb

@@ -0,0 +1,17 @@
+module AASM
+  unless AASM.const_defined?('StateMachineFactory')
+    StateMachineFactory = {}
+  end
+  
+  class StateMachine
+    attr_accessor :states, :events, :initial_state
+    attr_reader :name
+    
+    def initialize(name)
+      @name   = name
+      @initial_state = nil
+      @states = []
+      @events = []
+    end
+  end
+end