Resolve "Use Same Endpoint for HTML and JSON in OperationsController"

ee/app/controllers/operations_controller.rb

 # frozen_string_literal: true
 
+# Note: Both Operations dashboard (https://docs.gitlab.com/ee/user/operations_dashboard/) and Environments dashboard (https://docs.gitlab.com/ee/ci/environments/environments_dashboard.html) features are co-existing in the same controller.
 class OperationsController < ApplicationController
   before_action :authorize_read_operations_dashboard!
 
-  respond_to :json, only: [:list]
-
   feature_category :release_orchestration
 
   POLLING_INTERVAL = 120_000
 
+  # Used by Operations dashboard.
   def index
-  end
-
-  def environments
-  end
+    respond_to do |format|
+      format.html
 
-  def list
-    Gitlab::PollingInterval.set_header(response, interval: POLLING_INTERVAL)
+      format.json do
+        set_polling_interval_header
         projects = load_projects
 
         render json: { projects: serialize_as_json(projects) }
       end
+    end
+  end
 
-  def environments_list
-    Gitlab::PollingInterval.set_header(response, interval: POLLING_INTERVAL)
+  # Used by Environments dashboard.
+  def environments
+    respond_to do |format|
+      format.html
+
+      format.json do
+        set_polling_interval_header
         projects = load_environments_projects
 
         render json: { projects: serialize_as_json_for_environments(projects) }
       end
+    end
+  end
 
+  # Used by Operations and Environments dashboard.
   def create
+    respond_to do |format|
+      format.json do
         project_ids = params['project_ids']
 
         result = add_projects(project_ids)
@@ -40,7 +50,10 @@ class OperationsController < ApplicationController
           invalid: result.invalid_project_ids
         }
       end
+    end
+  end
 
+  # Used by Operations and Environments dashboard.
   def destroy
     project_id = params['project_id']
 
@@ -57,6 +70,10 @@ class OperationsController < ApplicationController
     render_404 unless can?(current_user, :read_operations_dashboard)
   end
 
+  def set_polling_interval_header
+    Gitlab::PollingInterval.set_header(response, interval: POLLING_INTERVAL)
+  end
+
   def load_projects
     Dashboard::Operations::ListService.new(current_user).execute
   end

ee/app/helpers/ee/operations_helper.rb

@@ -6,8 +6,8 @@ module EE
 
     def operations_data
       {
-        'add-path' => add_operations_project_path,
-        'list-path' => operations_list_path,
+        'add-path' => add_operations_project_path(format: :json),
+        'list-path' => operations_path(format: :json),
         'empty-dashboard-svg-path' => image_path('illustrations/operations-dashboard_empty.svg'),
         'empty-dashboard-help-path' => help_page_path('user/operations_dashboard/index.md')
       }
@@ -15,8 +15,8 @@ module EE
 
     def environments_data
       {
-        'add-path' => add_operations_project_path,
-        'list-path' => operations_environments_list_path,
+        'add-path' => add_operations_environments_project_path(format: :json),
+        'list-path' => operations_environments_path(format: :json),
         'empty-dashboard-svg-path' => image_path('illustrations/operations-dashboard_empty.svg'),
         'empty-dashboard-help-path' => help_page_path('ci/environments/environments_dashboard.md'),
         'environments-dashboard-help-path' => help_page_path('ci/environments/environments_dashboard.md')

ee/app/serializers/dashboard_environments_project_entity.rb

@@ -9,7 +9,7 @@ class DashboardEnvironmentsProjectEntity < Grape::Entity
   expose :web_url
 
   expose :remove_path do |project|
-    remove_operations_project_path(project_id: project.id)
+    remove_operations_environments_project_path(project_id: project.id)
   end
 
   expose :namespace, using: API::Entities::NamespaceBasic

ee/config/routes/operations.rb

 # frozen_string_literal: true
 
+# Used by Operations dashboard
 get 'operations' => 'operations#index'
-get 'operations/environments' => 'operations#environments'
-get 'operations/list' => 'operations#list'
-get 'operations/environments_list' => 'operations#environments_list'
 post 'operations' => 'operations#create', as: :add_operations_project
 delete 'operations' => 'operations#destroy', as: :remove_operations_project
+
+# Used by Environments dashboard
+get 'operations/environments' => 'operations#environments'
+post 'operations/environments' => 'operations#create', as: :add_operations_environments_project
+delete 'operations/environments' => 'operations#destroy', as: :remove_operations_environments_project

ee/spec/routing/operations_routing_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Operations routing', 'routing' do
+  describe '/-/operations' do
+    it 'routes to the operations index action' do
+      expect(get("#{operations_path}.html")).to route_to(
+        controller: 'operations',
+        action: 'index',
+        format: 'html')
+
+      expect(get("#{operations_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'index',
+        format: 'json')
+    end
+
+    it 'routes to the operations create action' do
+      expect(post("#{add_operations_project_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'create',
+        format: 'json')
+    end
+
+    it 'routes to operations destroy action' do
+      expect(delete("#{remove_operations_project_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'destroy',
+        format: 'json')
+    end
+  end
+
+  describe '/-/operations/environments' do
+    it 'routes to the environments list action' do
+      expect(get("#{operations_environments_path}.html")).to route_to(
+        controller: 'operations',
+        action: 'environments',
+        format: 'html')
+
+      expect(get("#{operations_environments_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'environments',
+        format: 'json')
+    end
+
+    it 'routes to the environments create action' do
+      expect(post("#{add_operations_environments_project_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'create',
+        format: 'json')
+    end
+
+    it 'routes to environments destroy action' do
+      expect(delete("#{remove_operations_environments_project_path}.json")).to route_to(
+        controller: 'operations',
+        action: 'destroy',
+        format: 'json')
+    end
+  end
+end

ee/spec/views/operations/environments.html.haml_spec.rb

@@ -6,8 +6,8 @@ RSpec.describe 'operations/environments.html.haml' do
   it 'renders the frontend configuration' do
     render
 
-    expect(rendered).to match %r{data-add-path="/-/operations"}
-    expect(rendered).to match %r{data-list-path="/-/operations/environments_list"}
+    expect(rendered).to match %r{data-add-path="/-/operations/environments.json"}
+    expect(rendered).to match %r{data-list-path="/-/operations/environments.json"}
     expect(rendered).to match %r{data-empty-dashboard-svg-path="/assets/illustrations/operations-dashboard_empty.*\.svg"}
     expect(rendered).to match %r{data-empty-dashboard-help-path="/help/ci/environments/environments_dashboard.md"}
     expect(rendered).to match %r{data-environments-dashboard-help-path="/help/ci/environments/environments_dashboard.md"}

ee/spec/views/operations/index.html.haml_spec.rb

@@ -6,8 +6,8 @@ RSpec.describe 'operations/index.html.haml' do
   it 'renders the frontend configuration' do
     render
 
-    expect(rendered).to match %r{data-add-path="/-/operations"}
-    expect(rendered).to match %r{data-list-path="/-/operations/list"}
+    expect(rendered).to match %r{data-add-path="/-/operations.json"}
+    expect(rendered).to match %r{data-list-path="/-/operations.json"}
     expect(rendered).to match %{data-empty-dashboard-svg-path="/assets/illustrations/operations-dashboard_empty.*\.svg"}
     expect(rendered).to match %r{data-empty-dashboard-help-path="/help/user/operations_dashboard/index.md"}
   end