Introducing Lotus::View.generate as shortcut for .duplicate and .conf…

…igure

lib/lotus/layout.rb

@@ -22,7 +22,7 @@ module Layout
     #     include Lotus::Layout
     #   end
     def self.included(base)
-      conf = View.configuration
+      conf = Lotus::View::Configuration.for(base)
       conf.add_layout(base)
 
       base.class_eval do

lib/lotus/view.rb

@@ -72,19 +72,38 @@ def self.included(base)
 
     include Utils::ClassAttribute
 
+    # @since 0.2.0
     class_attribute :configuration
     self.configuration = Configuration.new
 
+    # @since 0.2.0
     def self.configure(&blk)
       configuration.instance_eval(&blk)
     end
 
+    # @since 0.2.0
     def self.duplicate
       dup.tap do |duplicated|
         duplicated.configuration = configuration.duplicate
       end
     end
 
+    # @since 0.2.0
+    def self.generate(mod, views = 'Views', &blk)
+      duplicate.tap do |duplicated|
+        mod.module_eval %{
+          module #{ views }; end
+          Layout = Lotus::Layout.dup
+        }
+
+        duplicated.configure do
+          namespace "#{ mod }::#{ views }"
+        end
+
+        duplicated.configure(&blk) if block_given?
+      end
+    end
+
     def self.load!
       configuration.load!
     end

lib/lotus/view/configuration.rb

@@ -1,5 +1,7 @@
 require 'set'
+require 'lotus/utils/class'
 require 'lotus/utils/kernel'
+require 'lotus/utils/string'
 require 'lotus/utils/load_paths'
 require 'lotus/view/rendering/layout_finder'
 
@@ -12,6 +14,13 @@ class Configuration
       attr_reader :views
       attr_reader :layouts
 
+      def self.for(base)
+        # TODO this implementation is similar to Lotus::Controller::Configuration consider to extract it into Lotus::Utils
+        namespace = Utils::String.new(base).namespace
+        framework = Utils::Class.load!("(#{namespace}|Lotus)::View")
+        framework.configuration
+      end
+
       def initialize
         @namespace = Object
         reset!

lib/lotus/view/dsl.rb

@@ -129,11 +129,7 @@ def format(value = nil)
       #   require 'lotus/view'
       #
       #   module Furnitures
-      #     View = Lotus::View.duplicate
-      #
-      #     View.configure do
-      #       namespace 'Furnitures'
-      #     end
+      #     View = Lotus::View.generate(self)
       #
       #     class Standalone
       #       include Furnitures::View
@@ -153,11 +149,7 @@ def format(value = nil)
       #   require 'lotus/view'
       #
       #   module Frontend
-      #     View = Lotus::View.duplicate
-      #
-      #     View.configure do
-      #       namespace 'Frontend::Views'
-      #     end
+      #     View = Lotus::View.generate(self)
       #
       #     class StandaloneView
       #       include Frontend::View
@@ -185,11 +177,7 @@ def format(value = nil)
       #
       #   module Bookshelf
       #     module Web
-      #       View = Lotus::View.duplicate
-      #
-      #       View.configure do
-      #         namespace 'Bookshelf::Web::Views'
-      #       end
+      #       View = Lotus::View.generate(self)
       #
       #       module Views
       #         module Books
@@ -201,11 +189,7 @@ def format(value = nil)
       #     end
       #
       #     module Api
-      #       View = Lotus::View.duplicate
-      #
-      #       View.configure do
-      #         namespace 'Bookshelf::Api::Views'
-      #       end
+      #       View = Lotus::View.generate(self)
       #
       #       module Views
       #         module Books

test/fixtures.rb

@@ -201,15 +201,10 @@ class Parent
 end
 
 module CardDeck
-  View = Lotus::View.duplicate
-
-  View.module_eval do
-    configuration.reset!
-    configure do
-      namespace CardDeck
-      root __dir__ + '/fixtures/templates/card_deck/app/templates'
-      layout :application
-    end
+  View = Lotus::View.generate(self) do
+    namespace CardDeck
+    root __dir__ + '/fixtures/templates/card_deck/app/templates'
+    layout :application
   end
 
   class ApplicationLayout

test/integration/template_name_test.rb

@@ -86,11 +86,7 @@ module HardwareView
     #         index.rb                   Furnitures::Furnitures::Index
     # application.rb                     Furnitures::Application
     module Furnitures
-      View = Lotus::View.duplicate
-
-      View.configure do
-        namespace Furnitures
-
+      View = Lotus::View.generate(self) do
         # This line is here only for ducumentation purposes, but it's commented
         # because the path doesn't exist.
         #
@@ -137,10 +133,7 @@ class Index
     #   backend/
     #     application.rb                 Backend::Application
     module Frontend
-      View = Lotus::View.duplicate
-
-      View.configure do
-        namespace 'Frontend::Views'
+      View = Lotus::View.generate(self) do
         # This line is here only for ducumentation purposes, but it's commented
         # because the path doesn't exist.
         #
@@ -192,11 +185,7 @@ class New
     #     application.rb          Bookshelf::Api
     module Bookshelf
       module Web
-        View = Lotus::View.duplicate
-
-        View.configure do
-          namespace 'Bookshelf::Web::Views'
-
+        View = Lotus::View.generate(self) do
           # This line is here only for ducumentation purposes, but it's
           # commented because the path doesn't exist.
           #
@@ -213,11 +202,7 @@ class Show
       end
 
       module Api
-        View = Lotus::View.duplicate
-
-        View.configure do
-          namespace 'Bookshelf::Api::Views'
-
+        View = Lotus::View.generate(self) do
           # This line is here only for ducumentation purposes, but it's
           # commented because the path doesn't exist.
           #

test/view/configuration_test.rb

@@ -207,10 +207,7 @@ class LazyLayout
         end
 
         module LazyApp
-          View = Lotus::View.duplicate
-          View.configure do
-            namespace 'LazyApp::Views'
-          end
+          View = Lotus::View.generate(self)
 
           module Views
             module Dashboard
@@ -220,6 +217,7 @@ class Index
             end
 
             class ApplicationLayout
+              include LazyApp::Layout
             end
           end
         end
@@ -232,6 +230,7 @@ class ApplicationLayout
 
       it 'lazily loads the layout' do
         expected = LazyApp::Views::ApplicationLayout
+        expected.template.must_equal 'application'
 
         LazyApp::Views::Dashboard::Index.layout.must_equal               expected
         LazyApp::Views::Dashboard::Index.configuration.layout.must_equal expected

test/view_test.rb

@@ -137,6 +137,64 @@ class ConfigurationLayout
     end
   end
 
+  describe '.generate' do
+    before do
+      Lotus::View.configure { layout :application }
+
+      module Generated
+        View = Lotus::View.generate(self)
+      end
+
+      module GeneratedCustom
+        View = Lotus::View.generate(self, 'Viewz')
+      end
+
+      module GeneratedConfigure
+        View = Lotus::View.generate(self) do
+          layout :app
+        end
+
+        module Views
+          class AppLayout
+            include GeneratedConfigure::Layout
+          end
+        end
+      end
+    end
+
+    after do
+      Lotus::View.configuration.reset!
+
+      Object.send(:remove_const, :Generated)
+      Object.send(:remove_const, :GeneratedCustom)
+      Object.send(:remove_const, :GeneratedConfigure)
+    end
+
+    it 'duplicates the configuration of the framework' do
+      actual   = Generated::View.configuration
+      expected = Lotus::View.configuration
+
+      actual.layout.must_equal(expected.layout)
+    end
+
+    it 'generates a namespace for views' do
+      assert defined?(Generated::Views), 'Generated::Views expected'
+    end
+
+    it 'generates a custom namespace for views' do
+      assert defined?(GeneratedCustom::Viewz), 'GeneratedCustom::Viewz expected'
+    end
+
+    it 'duplicates Layout' do
+      assert defined?(Generated::Layout), 'Generated::Layout expected'
+    end
+
+    it 'optionally accepts a block to configure the generated module' do
+      expected = GeneratedConfigure::Views::AppLayout
+      GeneratedConfigure::View.configuration.layout.must_equal expected
+    end
+  end
+
   describe 'global layout' do
     before do
       Lotus::View.class_eval do