created interactor and organizers

lib/zertico.rb

@@ -6,4 +6,7 @@ module Zertico
   autoload :Service, 'zertico/service'
   autoload :Accessor, 'zertico/accessor'
   autoload :Responder, 'zertico/responder'
+  autoload :Organizer, 'zertico/organizer'
+  autoload :Interactor, 'zertico/interactor'
+  autoload :Exceptions, 'zertico/exceptions'
 end

lib/zertico/exceptions.rb

@@ -0,0 +1,5 @@
+module Zertico
+  module Exceptions
+    autoload :InteractorException, 'zertico/exceptions/interactor_exception'
+  end
+end

lib/zertico/exceptions/interactor_exception.rb

@@ -0,0 +1,6 @@
+module Zertico
+  module Exceptions
+    class InteractorException < Exception
+    end
+  end
+end

lib/zertico/interactor.rb

@@ -0,0 +1,15 @@
+module Zertico
+  class Interactor
+    def fail!(message = '')
+      raise Zertico::Exceptions::InteractorException, message
+    end
+
+    def perform(params)
+      fail!('Need to overwrite this method!')
+    end
+
+    def rollback(params)
+      # Should overwrite!
+    end
+  end
+end

lib/zertico/organizer.rb

@@ -0,0 +1,28 @@
+module Zertico
+  class Organizer
+    def define_interactors(interactors = [])
+      @interactors_classes = interactors.flatten
+    end
+
+    def perform(params)
+      @params = params
+      begin
+        @interactors_classes.each_with_index do |interactor_class, i|
+          @index = i
+          response_hash = interactor_class.new.perform(@params)
+          @params.merge!(response_hash)
+        end
+        true
+      rescue Zertico::Exceptions::InteractorException
+        rollback
+      end
+    end
+
+    def rollback
+      (0..@index-1).each do |i|
+        @interactors_classes[i].new.rollback(@params)
+      end
+      false
+    end
+  end
+end

spec/zertico/interactor_spec.rb

@@ -0,0 +1,11 @@
+require 'spec_helper'
+
+describe Zertico::Interactor do
+  let(:interactor) { Zertico::Interactor.new }
+
+  describe '#fail' do
+    it 'should raise the interactor exception' do
+      expect { interactor.fail! }.to raise_error
+    end
+  end
+end

spec/zertico/organizer_spec.rb

@@ -0,0 +1,56 @@
+require 'spec_helper'
+
+describe Zertico::Organizer do
+  let(:organizer) { Zertico::Organizer.new }
+
+  describe '#define_interactors' do
+    context 'when it not receive params' do
+      it 'should return an empty array' do
+        organizer.define_interactors.should == []
+      end
+    end
+
+    context 'when it receive some params' do
+      it 'should return a filled array' do
+        organizer.define_interactors([Zertico::Interactor]).should == [Zertico::Interactor]
+      end
+    end
+  end
+
+  describe '#perform' do
+    context 'when it not raise an exception' do
+      before :each do
+        organizer.define_interactors([Zertico::Interactor])
+        Zertico::Interactor.stub_chain(:new, perform: {})
+      end
+
+      it 'should return true' do
+        organizer.perform({}).should be_true
+      end
+    end
+
+    context 'when it raise an exception' do
+      before :each do
+        organizer.define_interactors([Zertico::Interactor])
+        Zertico::Organizer.stub(rollback: false)
+      end
+
+      it 'should return false' do
+        organizer.perform({}).should be_false
+      end
+    end
+  end
+
+  describe '#rollback' do
+    context 'when it raise an exception' do
+      before :each do
+        organizer.define_interactors([Zertico::Interactor])
+        organizer.instance_variable_set("@index", 0)
+      end
+
+      it 'should return false' do
+        organizer.rollback.should be_false
+      end
+    end
+  end
+end