Refactoring: Transaction more readable and ensures cleanup even if block exits early

app/models/transaction.rb

@@ -1,26 +1,102 @@
 class Transaction
-  def self.execute(options = {})
+  attr_reader :options
-    if options[:reset_user_id] == true
+  attr_accessor :original_user_id, :original_interface_handle
-      UserInfo.current_user_id = 1
+
-    end
+  def initialize(options = {})
-    if options[:bulk] == true
+    @options = options
-      BulkImportInfo.enable
+  end
-    end
+
-    original_interface_handle = ApplicationHandleInfo.current
+  def execute
-    if options[:interface_handle]
+    start_execute
-      ApplicationHandleInfo.current = options[:interface_handle]
+
-    end
     ActiveRecord::Base.transaction do
-      PushMessages.init
+      start_transaction
+
       yield
-      if options[:interface_handle]
+    ensure
-        ApplicationHandleInfo.current = original_interface_handle
+      finish_transaction
-      end
-      TransactionDispatcher.commit(options)
-      PushMessages.finish
     end
-    return if options[:bulk] != true
+  ensure
+    finish_execute
+  end
+
+  def self.execute(options = {}, &block)
+    Transaction.new(options).execute(&block)
+  end
+
+  private
+
+  def start_execute
+    reset_user_id_start
+    bulk_import_start
+    interface_handle_start
+  end
+
+  def start_transaction
+    PushMessages.init
+  end
+
+  def finish_execute
+    reset_user_id_finish
+    bulk_import_finish
+  end
+
+  def finish_transaction
+    interface_handle_finish
+
+    TransactionDispatcher.commit(options)
+    PushMessages.finish
+  end
+
+  def reset_user_id?
+    options[:reset_user_id] == true
+  end
+
+  def reset_user_id_start
+    return if !reset_user_id?
+
+    self.original_user_id = UserInfo.current_user_id
+
+    UserInfo.current_user_id = 1
+  end
+
+  def reset_user_id_finish
+    return if !reset_user_id?
+
+    UserInfo.current_user_id = original_user_id
+  end
+
+  def bulk_import?
+    options[:bulk] == true
+  end
+
+  def bulk_import_start
+    return if !bulk_import?
+
+    BulkImportInfo.enable
+  end
+
+  def bulk_import_finish
+    return if !bulk_import?
 
     BulkImportInfo.disable
   end
+
+  def interface_handle?
+    options[:interface_handle].present?
+  end
+
+  def interface_handle_start
+    return if !interface_handle?
+
+    self.original_interface_handle = ApplicationHandleInfo.current
+
+    ApplicationHandleInfo.current = options[:interface_handle]
+  end
+
+  def interface_handle_finish
+    return if !interface_handle?
+
+    ApplicationHandleInfo.current = original_interface_handle
+  end
 end