base.rb in simple_model-1.0.0

- old
+ new

@@ -1,7 +1,7 @@
-module SimpleModel
-  # require all that active support we know and love
+module SimpleModel  
+  # Require all that active support we know and love
   require 'active_support/time'
   require 'active_support/core_ext/class/attribute'
   require 'active_support/core_ext/class/attribute_accessors'
   require 'active_support/core_ext/class/delegating_attributes'
   require 'active_support/core_ext/class/attribute'
@@ -14,15 +14,129 @@
   require 'active_support/core_ext/module/delegation'
   require 'active_support/core_ext/module/introspection'
   require 'active_support/core_ext/object/duplicable'
   require 'active_support/core_ext/object/blank'
 
+  # == SimpleModel::Base
+  #
+  # Provides an interface for any class to build tabless models.
+  # 
+  # Implements Validations and Callsbacks from ActiveModel and attribute datatype specific
+  # attribute definition with default options
+  # 
+  # == SimpleModel Actions:
+  # 
+  # Model actions provide a tool for making use of Active Model callbacks. Each
+  # action creates an instance method representing the action, which calls the 
+  # method(s) listed as symbolswhen defining the actions. Model actions also accept 
+  # a rollback option, which is called if the action fails. If you plan to 
+  # implement SimpleModel's actions make avoid naming you own methods "save", "destory",
+  # "create", and "update", as this will override the methods defined by action.
+  # 
+  # Available Actions:
+  #   # save
+  #   # update
+  #   # create
+  #   # destory
+  # 
+  # ==== Example
+  # 
+  # class MyModel < SimpleModel::Base
+  #   save :my_save, :rollback => :undo_save
+  #   update :my_update, :rollback => :undo_update
+  #   destroy :my_destory, :rollback => :undo_destory
+  # end
+  # 
+  # A basic SimpleModel implementation might resemble
+  # 
+  # class MyModel < SimpleModel::Base
+  # 
+  #   has_integers :first_int, :second_int, :default => 1
+  #   has_times :now, :default => :get_now
+  #   
+  #   save :save_record, :rollback => :rollback
+  # 
+  #   def save_record
+  #     puts "saved"
+  #     true
+  #   end
+  # 
+  #   def get_today
+  #     Time.now
+  #   end
+  #   
+  #   def rollback
+  #     puts "rolled back"
+  #   end
+  # end
+  # 
+  # 
+  #
+ 
   class Base
     include SimpleModel::Attributes
     include SimpleModel::ErrorHelpers
 
-    #User ActiveModel Resources
+    #Use ActiveModel Resources
     include ActiveModel::Validations
     include ActiveModel::Conversion
     extend ActiveModel::Naming
+    extend ActiveModel::Callbacks
+    include ActiveModel::Validations::Callbacks
+    define_model_callbacks :save, :update, :create, :destroy
+     
+    has_boolean :saved
+    has_boolean :new_record, :default => true
+    
+    attr_accessor :id
+
+    def persisted?
+      saved?
+    end
+     
+    
+    def self.save(*methods)
+      define_model_action(methods,:save)
+    end
+    
+    def self.create(*methods)
+      define_model_action(methods,:create)
+    end
+    
+    def self.update(*methods)
+      define_model_action(methods,:update)
+    end
+    
+    def self.destroy(*methods)
+      define_model_action(methods,:destroy)
+    end 
+    
+    private
+    
+    def run_model_action(methods,options)
+      completed = true
+      if self.valid?
+        methods.each do |method|
+          ran = self.send(method)
+          completed = ran unless ran
+        end
+        if completed
+          self.saved = true
+        else
+          self.send(options[:rollback]) unless options[:rollback].blank?
+        end    
+      else 
+        completed = false
+      end  
+      completed
+    end
+    
+    def self.define_model_action(methods,action)
+      options = methods.extract_options!
+      define_method(action) do
+        self.run_callbacks(action) do  
+          run_model_action(methods,options)
+        end
+      end
+    end
   end
 end
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