Adds a flag to reflect whether or not there is data in cycle analytics

app/controllers/projects/cycle_analytics_controller.rb

@@ -8,6 +8,10 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
   def show
     @cycle_analytics = ::CycleAnalytics.new(@project, from: start_date(cycle_analytics_params))
 
+    stats_values, cycle_analytics_json = generate_cycle_analytics_json
+
+    @cycle_analytics_not_set_up = stats_with_no_data?(stats_values)
+
     respond_to do |format|
       format.html
       format.json { render json: cycle_analytics_json }
@@ -22,7 +26,9 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
     { start_date: params[:cycle_analytics][:start_date] }
   end
 
-  def cycle_analytics_json
+  def generate_cycle_analytics_json
+    stats_values = []
+
     cycle_analytics_view_data = [[:issue, "Issue", "Time before an issue gets scheduled"],
                                  [:plan, "Plan", "Time before an issue starts implementation"],
                                  [:code, "Code", "Time until first merge request"],
@@ -34,11 +40,14 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
     stats = cycle_analytics_view_data.reduce([]) do |stats, (stage_method, stage_text, stage_description)|
       value = @cycle_analytics.send(stage_method).presence
 
+      stats_values << value.abs if value
+
       stats << {
         title: stage_text,
         description: stage_description,
         value: value && !value.zero? ? distance_of_time_in_words(value) : nil
       }
+
       stats
     end
 
@@ -52,10 +61,15 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
       { title: "Deploy".pluralize(deploys), value: deploys }
     ]
 
-    {
-      summary: summary,
+    cycle_analytics_hash = { summary: summary,
                              stats: stats,
                              permissions: @cycle_analytics.permissions(user: current_user)
     }
+
+    [stats_values, cycle_analytics_hash]
+  end
+
+  def stats_with_no_data?(stats_values)
+    stats_values.blank? || stats_values.inject(:+).zero?
   end
 end

spec/controllers/projects/cycle_analytics_controller_spec.rb

+require 'spec_helper'
+
+describe Projects::CycleAnalyticsController do
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+
+  before do
+    sign_in(user)
+    project.team << [user, :master]
+  end
+
+  describe 'cycle analytics not set up flag' do
+    context 'with no data' do
+      it 'is true' do
+        get(:show,
+            namespace_id: project.namespace.to_param,
+            project_id: project.to_param)
+
+        expect(response).to be_success
+        expect(assigns(:cycle_analytics_not_set_up)).to eq(true)
+      end
+    end
+
+    context 'with data' do
+      before do
+        issue = create(:issue, project: project, created_at: 4.days.ago)
+        milestone = create(:milestone, project: project, created_at: 5.days.ago)
+        issue.update(milestone: milestone)
+
+        create_merge_request_closing_issue(issue)
+      end
+
+      it 'is false' do
+        get(:show,
+            namespace_id: project.namespace.to_param,
+            project_id: project.to_param)
+
+        expect(response).to be_success
+        expect(assigns(:cycle_analytics_not_set_up)).to eq(false)
+      end
+    end
+  end
+end