Add service and form object base class

Author: tranquangvu

app/forms/application_form.rb

@@ -0,0 +1,23 @@
+class ApplicationForm
+  include ActiveModel::Model
+
+  class << self
+    def i18n_scope
+      :form
+    end
+  end
+
+  # Inherited class should define 2 methods like below:
+  #
+  #   def initialize(params = {})
+  #     @model = Model.new
+  #     super(params)
+  #
+  #     # other actions here...
+  #   end
+
+  #   def submit
+  #     return false if invalid?
+  #     # other actions here...
+  #   end
+end

app/forms/base_form.rb

@@ -0,0 +1,13 @@
+class ApplicationService
+  def self.call(*args, &block)
+    new(*args, &block).call
+  end
+
+  # Inherited class should define 2 methods:
+  #
+  #   def initialize(*args)
+  #   end
+
+  #   def call
+  #   end
+end