Lesson 8 (fs#69)

Added lesson 8 materials

.rubocop.yml

@@ -41,4 +41,7 @@ Rails/NotNullColumn:
 I18n/GetText/DecorateFunctionMessage:
   Exclude:
     - 'app/controllers/concerns/authentication.rb'
-  Enabled: false
+  Enabled: false
+
+Metrics/MethodLength:
+  Max: 20

Gemfile

@@ -5,6 +5,7 @@ ruby "2.7.4"
 
 gem "action_policy"
 gem "enumerize"
+gem "interactor", "~> 3.0"
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
 gem "rails", "~> 6.1.7"
 # Use postgresql as the database for Active Record

Gemfile.lock

@@ -93,6 +93,7 @@ GEM
       activesupport (>= 6.1)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
+    interactor (3.1.2)
     jbuilder (2.11.5)
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
@@ -291,6 +292,7 @@ DEPENDENCIES
   byebug
   capybara (>= 3.26)
   enumerize
+  interactor (~> 3.0)
   jbuilder (~> 2.7)
   kaminari
   listen (~> 3.3)

app/controllers/projects_controller.rb

@@ -18,11 +18,10 @@ def new
   def edit; end
 
   def create
-    @project = Project.new(project_params)
-    @project_membership = ProjectMembership.new(project_membership_params)
+    @project = create_project.project
 
-    if @project.save && @project_membership.save
-      redirect_to projects_path, notice: "Created Successful"
+    if create_project.success?
+      redirect_to @project, notice: "Created Successful"
     else
       render :new, status: :unprocessable_entity
     end
@@ -47,11 +46,12 @@ def set_project
     @project = Project.find_by(id: params[:id])
   end
 
-  def project_membership_params
-    { project: @project, user: current_user, role: :owner }
-  end
-
   def project_params
     params.require(:project).permit(:name, :description)
   end
+
+  def create_project
+    @create_project ||= ::Projects::Create.call(project_params: project_params,
+                                                user: current_user)
+  end
 end

app/interactors/projects/create.rb

@@ -0,0 +1,8 @@
+module Projects
+  class Create
+    include Interactor::Organizer
+
+    organize Projects::Save,
+             Projects::Create::CreateOwner
+  end
+end

app/interactors/projects/create/create_owner.rb

@@ -0,0 +1,32 @@
+module Projects
+  class Create
+    class CreateOwner
+      include Interactor
+
+      delegate :project, :user, to: :context
+
+      def call
+        raise_error unless owner_membership.save
+      end
+
+      private
+
+      def owner_membership
+        @owner_membership ||= ProjectMembership.new(prepared_owner_membership_params)
+      end
+
+      def prepared_owner_membership_params
+        {
+          project: project,
+          user: user,
+          role: :owner
+        }
+      end
+
+      def raise_error
+        project.destroy
+        context.fail!(error: "Invalid data")
+      end
+    end
+  end
+end

app/interactors/projects/save.rb

@@ -0,0 +1,19 @@
+module Projects
+  class Save
+    include Interactor
+
+    delegate :project_params, to: :context
+
+    def call
+      context.project = project
+
+      context.fail!(error: "Invalid data") unless project.save
+    end
+
+    private
+
+    def project
+      @project ||= Project.new(project_params)
+    end
+  end
+end

app/views/projects/index.html.erb

@@ -14,7 +14,7 @@
     <p><%= project.id %>. <%= link_to project.name, project_tasks_path(project) %></p>
     <p><%= project.description %> </p>
     <p><%= link_to "Edit", edit_project_path(project) %></p>
-    <p><%= button_to "Destroy", project, method: :delete %></p>
+    <p><%= button_to "Destroy", project, method: :delete, data: {confirm: "Are you sure?"} %></p>
   </div>
 <% end %>