Create a new endpoint to copy common_metrics.yml to the local project

ee/app/controllers/projects/performance_monitoring/dashboards_controller.rb

+# frozen_string_literal: true
+
+module Projects
+  module PerformanceMonitoring
+    class DashboardsController < ::Projects::ApplicationController
+      include BlobHelper
+
+      before_action :check_repository_available!
+      before_action :validate_dashboard_template!
+      before_action :authorize_push!
+
+      USER_DASHBOARDS_DIR = ::Metrics::Dashboard::ProjectDashboardService::DASHBOARD_ROOT
+      DASHBOARD_TEMPLATES = {
+        ::Metrics::Dashboard::SystemDashboardService::DASHBOARD_PATH => true,
+        ::Metrics::Dashboard::ClusterDashboardService::DASHBOARD_PATH => true
+      }.freeze
+
+      def create
+        result = ::Files::CreateService.new(project, current_user, dashboard_attrs).execute
+
+        if result[:status] == :success
+          respond_success
+        else
+          respond_error(result[:message])
+        end
+      end
+
+      private
+
+      def respond_success
+        respond_to do |format|
+          format.html { redirect_to ide_edit_path(project, branch, new_dashboard_path) }
+          format.json { render json: { redirect_to: ide_edit_path(project, branch, new_dashboard_path) }, status: :created }
+        end
+      end
+
+      def respond_error(message)
+        flash[:alert] = message
+
+        respond_to do |format|
+          format.html { redirect_back_or_default(default: namespace_project_environments_path) }
+          format.json { render json: { error: message }, status: :bad_request }
+        end
+      end
+
+      def authorize_push!
+        access_denied!(%q(You can't commit to this project)) unless user_access(project).can_push_to_branch?(branch)
+      end
+
+      def branch
+        params.require(:branch)
+      end
+
+      def dashboard_attrs
+        {
+          commit_message: commit_message,
+          file_path: new_dashboard_path,
+          file_content: new_dashboard_content,
+          encoding: 'text',
+          branch_name: branch,
+          start_branch: repository.branch_exists?(branch) ? branch : project.default_branch
+        }
+      end
+
+      def commit_message
+        params[:commit_message] || "Create custom dashboard #{params.require(:file_name)}"
+      end
+
+      def new_dashboard_path
+        File.join(USER_DASHBOARDS_DIR, params.require(:file_name))
+      end
+
+      def new_dashboard_content
+        File.read params.require(:dashboard)
+      end
+
+      def validate_dashboard_template!
+        access_denied! unless DASHBOARD_TEMPLATES[params.require(:dashboard)]
+      end
+    end
+  end
+end

ee/config/routes/project.rb

@@ -60,6 +60,11 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         end
 
         resources :subscriptions, only: [:create, :destroy]
+
+        namespace :performance_monitoring do
+          resources :dashboards, only: [:create]
+        end
+
         resources :licenses, only: [:index, :create, :update], controller: 'security/licenses'
 
         resources :environments, only: [] do

ee/spec/controllers/projects/performance_monitoring/dashboards_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Projects::PerformanceMonitoring::DashboardsController do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:namespace) { create(:namespace) }
+  let!(:project) { create(:project, :repository, name: 'dashboard-project', namespace: namespace) }
+  let(:commit_message) { 'test' }
+  let(:branch) { "#{Time.current.to_i}_dashboard_new_branch" }
+  let(:dashboard) { 'config/prometheus/common_metrics.yml' }
+  let(:file_name) { 'custom_dashboard.yml' }
+  let(:params) do
+    {
+      namespace_id: namespace,
+      project_id: project,
+      dashboard: dashboard,
+      file_name: file_name,
+      commit_message: commit_message,
+      branch: branch,
+      format: :json
+    }
+  end
+
+  describe 'POST #create' do
+    context 'authenticated user' do
+      before do
+        sign_in(user)
+      end
+
+      context 'project with repository feature' do
+        context 'with rights to push to the repository' do
+          before do
+            project.add_maintainer(user)
+          end
+
+          context 'valid parameters' do
+            it 'delegates commit creation to service' do
+              dashboard_attrs = {
+                commit_message: commit_message,
+                branch_name: branch,
+                start_branch: 'master',
+                encoding: 'text',
+                file_path: '.gitlab/dashboards/custom_dashboard.yml',
+                file_content: File.read('config/prometheus/common_metrics.yml')
+              }
+
+              service_instance = instance_double(::Files::CreateService)
+              expect(::Files::CreateService).to receive(:new).with(project, user, dashboard_attrs).and_return(service_instance)
+              expect(service_instance).to receive(:execute).and_return(status: :success)
+
+              post :create, params: params
+            end
+
+            context 'selected branch already exists' do
+              it 'responds with :created status code', :aggregate_failures do
+                post :create, params: params
+
+                expect(response).to have_gitlab_http_status :created
+
+                params[:file_name] = 'some_new_name.yml'
+
+                post :create, params: params
+
+                expect(response).to have_gitlab_http_status :created
+              end
+            end
+
+            context 'request format json' do
+              it 'returns path to new file' do
+                allow(::Files::CreateService).to receive(:new).and_return(double(execute: { status: :success }))
+
+                post :create, params: params
+
+                expect(response).to have_gitlab_http_status :created
+                expect(json_response).to eq('redirect_to' => "/-/ide/project/#{namespace.path}/#{project.name}/edit/#{branch}/-/.gitlab/dashboards/#{file_name}")
+              end
+
+              context 'files create service failure' do
+                it 'returns json with failure message' do
+                  allow(::Files::CreateService).to receive(:new).and_return(double(execute: { status: false, message: 'something went wrong' }))
+
+                  post :create, params: params
+
+                  expect(response).to have_gitlab_http_status :bad_request
+                  expect(response).to set_flash[:alert].to eq('something went wrong')
+                  expect(json_response).to eq('error' => 'something went wrong')
+                end
+              end
+            end
+
+            context 'request format html' do
+              before do
+                params.delete(:format)
+              end
+
+              it 'redirects to ide with new file' do
+                allow(::Files::CreateService).to receive(:new).and_return(double(execute: { status: :success }))
+
+                post :create, params: params
+
+                expect(response).to redirect_to "/-/ide/project/#{namespace.path}/#{project.name}/edit/#{branch}/-/.gitlab/dashboards/#{file_name}"
+              end
+
+              context 'files create service failure' do
+                it 'redirects back and sets alert' do
+                  allow(::Files::CreateService).to receive(:new).and_return(double(execute: { status: false, message: 'something went wrong' }))
+
+                  post :create, params: params
+
+                  expect(response).to set_flash[:alert].to eq('something went wrong')
+                  expect(response).to redirect_to namespace_project_environments_path
+                end
+              end
+            end
+          end
+
+          context 'invalid dashboard template' do
+            let(:dashboard) { 'config/database.yml' }
+
+            it 'responds 404 not found' do
+              post :create, params: params
+
+              expect(response).to have_gitlab_http_status :not_found
+            end
+          end
+
+          context 'missing commit message' do
+            before do
+              params.delete(:commit_message)
+            end
+
+            it 'use default commit message' do
+              dashboard_attrs = {
+                commit_message: 'Create custom dashboard custom_dashboard.yml',
+                branch_name: branch,
+                start_branch: 'master',
+                encoding: 'text',
+                file_path: ".gitlab/dashboards/custom_dashboard.yml",
+                file_content: File.read('config/prometheus/common_metrics.yml')
+              }
+
+              service_instance = instance_double(::Files::CreateService)
+              expect(::Files::CreateService).to receive(:new).with(project, user, dashboard_attrs).and_return(service_instance)
+              expect(service_instance).to receive(:execute).and_return(status: :success)
+
+              post :create, params: params
+            end
+          end
+
+          context 'missing branch' do
+            let(:branch) { nil }
+
+            it 'raises ActionController::ParameterMissing' do
+              expect { post :create, params: params }.to raise_error ActionController::ParameterMissing
+            end
+          end
+        end
+
+        context 'without rights to push to repository' do
+          before do
+            project.add_guest(user)
+          end
+
+          it 'responds with :forbidden status code' do
+            post :create, params: params
+
+            expect(response).to have_gitlab_http_status :forbidden
+          end
+        end
+      end
+
+      context 'project without repository feature' do
+        let!(:project) { create(:project, name: 'dashboard-project', namespace: namespace) }
+
+        it 'responds with :not_found status code' do
+          post :create, params: params
+
+          expect(response).to have_gitlab_http_status :not_found
+        end
+      end
+    end
+  end
+end