feat: add Researcher Classes landing page, controller, routes, policy…

…, and policy spec [PT-187185134]

rails/app/controllers/admin/projects_controller.rb

@@ -69,6 +69,13 @@ def edit
     # renders edit.html.haml
   end
 
+  # GET /admin/projects/1/classes
+  def classes
+    @project = Admin::Project.find(params[:id])
+    authorize @project
+    # renders classes.html.haml
+  end
+
   # POST /admin/projects
   def create
     authorize Admin::Project

rails/app/helpers/navigation_helper.rb

@@ -263,7 +263,7 @@ def researcher_project_links
       links << {
         id: "/researcher_projects/#{project.id}",
         label: project.name,
-        url: url_for(project),
+        url: url_for([:classes, project]),
       }
     end
 

rails/app/policies/admin/project_policy.rb

@@ -81,4 +81,8 @@ def assign_to_material?
   def api_show?
     teacher? || admin?
   end
+
+  def classes?
+    update_or_edit? || user.is_project_researcher?(record)
+  end
 end

rails/app/views/admin/projects/classes.haml

@@ -0,0 +1,2 @@
+%div
+  %h1 Research Classes: #{@project.name}

rails/config/routes.rb

@@ -224,6 +224,9 @@
       resources :projects do
         resources :cohorts
         resources :project_links
+        member do
+          get :classes
+        end
       end
       resources :cohorts
       resources :project_links

rails/spec/policies/admin/project_policy_spec.rb

@@ -191,8 +191,39 @@
       end
     end
 
+    describe 'classes' do
+      describe 'a regular user' do
+        it 'should not permit access to classes page' do
+          expect(policy.classes?).to be false
+        end
+      end
 
-  end
+      describe 'as site admin' do
+        before(:each) do
+          allow(user).to receive(:has_role?).with('admin').and_return(true)
+        end
+        it 'should permit access to classses page' do
+          expect(policy.classes?).to be true
+        end
+      end
 
+      describe 'as a project admin' do
+        before(:each) do
+          allow(user).to receive(:is_project_admin?).with(project).and_return(true)
+        end
+        it 'should permit access to classses page' do
+          expect(policy.classes?).to be true
+        end
+      end
 
+      describe 'as a project researcher' do
+        before(:each) do
+          allow(user).to receive(:is_project_researcher?).with(project).and_return(true)
+        end
+        it 'should permit access to classses page' do
+          expect(policy.classes?).to be true
+        end
+      end
+    end
+  end
 end