Add processor generator, allow resource generator to create others

Restructure the generators directory structure
Controller generator can now add routes

Author: lgebhardt

jsonapi-resources.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
   spec.required_ruby_version = '>= 2.3'
 
-  spec.add_development_dependency 'bundler', '~> 1.17.3'
+  spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'minitest', '~> 5.10', '!= 5.10.2'
   spec.add_development_dependency 'minitest-spec-rails'

lib/generators/jsonapi/USAGE

@@ -0,0 +1,11 @@
+Description:
+    Controller Generator for JSONAPI Resources
+
+Examples:
+    rails generate jsonapi:controller Post
+
+    This will:
+        create: app/controllers/posts_controller.rb
+        add: a route to routes.rb
+
+    Note: If the resource is namespaced the namespace will be duplicated for each route

lib/generators/jsonapi/controller/USAGE

@@ -0,0 +1,62 @@
+module Jsonapi
+  class ControllerGenerator < Rails::Generators::NamedBase
+    source_root File.expand_path('../templates', __FILE__)
+
+    class_option :base_controller, type: :string, default: 'JSONAPI::ResourceController'
+    class_option :skip_routes, type: :boolean, desc: "Don't add routes to config/routes.rb."
+
+    def create_resource
+      template_file = File.join(
+        'app/controllers',
+        class_path,
+        "#{file_name.pluralize}_controller.rb"
+      )
+      template 'controller.rb.tt', template_file
+    end
+
+    def add_routes
+      return if options[:skip_routes]
+      route generate_routing_code
+    end
+
+    private
+
+    def base_controller
+      options['base_controller']
+    end
+
+    # This method creates nested route entry for namespaced resources.
+    # For eg. rails g controller foo/bar/baz index show
+    # Will generate -
+    # namespace :foo do
+    #   namespace :bar do
+    #     get 'baz/index'
+    #     get 'baz/show'
+    #   end
+    # end
+    def generate_routing_code
+      depth = 0
+      lines = []
+
+      # Create 'namespace' ladder
+      # namespace :foo do
+      #   namespace :bar do
+      regular_class_path.each do |ns|
+        lines << indent("namespace :#{ns} do\n", depth * 2)
+        depth += 1
+      end
+
+      lines << indent(%{jsonapi_resources :#{file_name.pluralize}\n}, depth * 2)
+
+      # Create `end` ladder
+      #   end
+      # end
+      until depth.zero?
+        depth -= 1
+        lines << indent("end\n", depth * 2)
+      end
+
+      lines.join
+    end
+  end
+end

lib/generators/jsonapi/controller/controller_generator.rb

@@ -0,0 +1,4 @@
+<% module_namespacing do -%>
+class <%= class_name.pluralize %>Controller < <%= base_controller %>
+end
+<% end -%>

lib/generators/jsonapi/controller/templates/controller.rb.tt

@@ -0,0 +1,8 @@
+Description:
+    Processor Generator for JSONAPI Resources
+
+Examples:
+    rails generate jsonapi:processor Post
+
+    This will:
+        create: app/processors/post_processor.rb

lib/generators/jsonapi/controller_generator.rb

@@ -0,0 +1,22 @@
+module Jsonapi
+  class ProcessorGenerator < Rails::Generators::NamedBase
+    source_root File.expand_path('../templates', __FILE__)
+
+    class_option :base_processor, type: :string, default: 'JSONAPI::Processor'
+
+    def create_processor
+      template_file = File.join(
+        'app/processors',
+        class_path,
+        "#{file_name.singularize}_processor.rb"
+      )
+      template 'processor.rb.tt', template_file
+    end
+
+    private
+
+    def base_processor
+      options['base_processor']
+    end
+  end
+end

lib/generators/jsonapi/processor/USAGE

@@ -0,0 +1,4 @@
+<% module_namespacing do -%>
+class <%= class_name.singularize %>Processor < <%= base_processor %>
+end
+<% end -%>

lib/generators/jsonapi/processor/processor_generator.rb

@@ -0,0 +1,13 @@
+Description:
+    Generator for JSONAPI Resources
+
+Options:
+    --controller Also generate a controller
+    --processor Also generate a processor
+    --model Also generate a model
+
+Examples:
+    rails generate jsonapi:resource Post
+
+    This will:
+        create: app/resources/post_resource.rb

lib/generators/jsonapi/processor/templates/processor.rb.tt

@@ -0,0 +1,35 @@
+require 'rails/generators'
+
+module Jsonapi
+  class ResourceGenerator < Rails::Generators::NamedBase
+    source_root File.expand_path('../templates', __FILE__)
+
+    class_option :base_resource, type: :string, default: 'JSONAPI::Resource'
+    class_option :controller, type: :boolean, default: false, desc: "Create a controller."
+    class_option :processor, type: :boolean, default: false, desc: "Create a processor."
+    class_option :skip_routes, type: :boolean, desc: "Don't add routes to config/routes.rb."
+
+    hook_for :controller do |controller|
+      invoke controller, [ file_path ]
+    end
+
+    hook_for :processor do |processor|
+      invoke processor, [ file_path ]
+    end
+
+    def create_resource
+      template_file = File.join(
+        'app/resources',
+        class_path,
+        "#{file_name.singularize}_resource.rb"
+      )
+      template 'resource.rb.tt', template_file
+    end
+
+    private
+
+    def base_resource
+      options['base_resource']
+    end
+  end
+end

lib/generators/jsonapi/resource/USAGE

@@ -0,0 +1,4 @@
+<% module_namespacing do -%>
+class <%= class_name.singularize %>Resource < <%= base_resource %>
+end
+<% end -%>

lib/generators/jsonapi/resource/resource_generator.rb

@@ -0,0 +1,3 @@
+Rails.application.routes.draw do
+  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
+end

lib/generators/jsonapi/resource/templates/resource.rb.tt

@@ -1,25 +1,36 @@
 require File.expand_path('../../../../test_helper', __FILE__)
-require 'generators/jsonapi/controller_generator'
+require 'generators/jsonapi/controller/controller_generator'
 
 module Jsonapi
   class ControllerGeneratorTest < Rails::Generators::TestCase
     tests ControllerGenerator
-    destination Rails.root.join('../controllers')
+    destination File.expand_path('../tmp', __dir__ )
     setup :prepare_destination
     teardown :cleanup_destination_root
 
     def cleanup_destination_root
       FileUtils.rm_rf destination_root
     end
 
+    def prepare_destination
+      super
+      FileUtils.cp_r File.expand_path('app_template/', __dir__ ) + '/.', destination_root
+    end
+
     test "controller is created" do
       run_generator ["post"]
       assert_file 'app/controllers/posts_controller.rb', /class PostsController < JSONAPI::ResourceController/
     end
 
+    test "base controller class is settable" do
+      run_generator %w[post --base_controller BaseController]
+      assert_file 'app/controllers/posts_controller.rb', /class PostsController < BaseController/
+    end
+
     test "controller is created with namespace" do
-      run_generator ["api/v1/post"]
-      assert_file 'app/controllers/api/v1/posts_controller.rb', /class Api::V1::PostsController < JSONAPI::ResourceController/
+      run_generator ["api/post"]
+      assert_file 'app/controllers/api/posts_controller.rb', /class Api::PostsController < JSONAPI::ResourceController/
+      assert_file 'config/routes.rb', /^( *)namespace :api do\n( *)jsonapi_resources :posts\n( *)end$/
     end
   end
 end

lib/generators/jsonapi/resource_generator.rb

@@ -0,0 +1,35 @@
+require File.expand_path('../../../../test_helper', __FILE__)
+require 'generators/jsonapi/processor/processor_generator'
+
+module Jsonapi
+  class ProcessorGeneratorTest < Rails::Generators::TestCase
+    tests ProcessorGenerator
+    destination File.expand_path('../tmp', __dir__ )
+    setup :prepare_destination
+    teardown :cleanup_destination_root
+
+    def cleanup_destination_root
+      FileUtils.rm_rf destination_root
+    end
+
+    test "processor is created" do
+      run_generator %w[post]
+      assert_file 'app/processors/post_processor.rb', /class PostProcessor < JSONAPI::Processor/
+    end
+
+    test "base processor class is settable" do
+      run_generator %w[post --base_processor BaseProcessor]
+      assert_file 'app/processors/post_processor.rb', /class PostProcessor < BaseProcessor/
+    end
+
+    test "processor is singular" do
+      run_generator %w[posts]
+      assert_file 'app/processors/post_processor.rb', /class PostProcessor < JSONAPI::Processor/
+    end
+
+    test "processor is created with namespace" do
+      run_generator %w[api/v1/post]
+      assert_file 'app/processors/api/v1/post_processor.rb', /class Api::V1::PostProcessor < JSONAPI::Processor/
+    end
+  end
+end

lib/generators/jsonapi/templates/jsonapi_controller.rb

@@ -1,30 +1,55 @@
 require File.expand_path('../../../../test_helper', __FILE__)
-require 'generators/jsonapi/resource_generator'
+require 'generators/jsonapi/resource/resource_generator'
 
 module Jsonapi
   class ResourceGeneratorTest < Rails::Generators::TestCase
     tests ResourceGenerator
-    destination Rails.root.join('../resources')
+    destination File.expand_path('../tmp', __dir__ )
     setup :prepare_destination
     teardown :cleanup_destination_root
 
     def cleanup_destination_root
       FileUtils.rm_rf destination_root
     end
 
+    def prepare_destination
+      super
+      FileUtils.cp_r File.expand_path('app_template/', __dir__ ) + '/.', destination_root
+    end
+
     test "resource is created" do
-      run_generator ["post"]
+      run_generator %w[post]
+      assert_file 'app/resources/post_resource.rb', /class PostResource < JSONAPI::Resource/
+    end
+
+    test "resource created with controller and processors" do
+      run_generator %w[post --controller --processor]
       assert_file 'app/resources/post_resource.rb', /class PostResource < JSONAPI::Resource/
+      assert_file 'app/controllers/posts_controller.rb', /class PostsController < JSONAPI::ResourceController/
+      assert_file 'app/processors/post_processor.rb', /class PostProcessor < JSONAPI::Processor/
+    end
+
+    test "base resource class is settable" do
+      run_generator %w[post --base_resource BaseResource]
+      assert_file 'app/resources/post_resource.rb', /class PostResource < BaseResource/
     end
 
     test "resource is singular" do
-      run_generator ["posts"]
+      run_generator %w[posts]
       assert_file 'app/resources/post_resource.rb', /class PostResource < JSONAPI::Resource/
     end
 
-    test "resource is created with namespace" do
-      run_generator ["api/v1/post"]
-      assert_file 'app/resources/api/v1/post_resource.rb', /class Api::V1::PostResource < JSONAPI::Resource/
+    test "namespaced resource is created" do
+      run_generator %w[api/post]
+      assert_file 'app/resources/api/post_resource.rb', /class Api::PostResource < JSONAPI::Resource/
+    end
+
+    test "namespaced resource, controller and processor are created" do
+      run_generator %w[api/post --controller --processor]
+      assert_file 'app/resources/api/post_resource.rb', /class Api::PostResource < JSONAPI::Resource/
+      assert_file 'app/controllers/api/posts_controller.rb', /class Api::PostsController < JSONAPI::ResourceController/
+      assert_file 'app/processors/api/post_processor.rb', /class Api::PostProcessor < JSONAPI::Processor/
+      assert_file 'config/routes.rb', /^( *)namespace :api do\n( *)jsonapi_resources :posts\n( *)end$/
     end
   end
 end