Move JSON generation (cycle analytics) into a controller method.

Helper methods are meant for views

app/controllers/projects/cycle_analytics_controller.rb

 class Projects::CycleAnalyticsController < Projects::ApplicationController
-  include CycleAnalyticsHelper
+  include ActionView::Helpers::DateHelper
 
   before_action :authorize_read_cycle_analytics!
 
@@ -8,7 +8,7 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
 
     respond_to do |format|
       format.html
-      format.json { render json: cycle_analytics_json(@cycle_analytics) }
+      format.json { render json: cycle_analytics_json }
     end
   end
 
@@ -27,4 +27,36 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
 
     { start_date: params[:cycle_analytics][:start_date] }
   end
+
+  def cycle_analytics_json
+    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"],
+                                 [:test, "Test", "Total test time for all commits/merges"],
+                                 [:review, "Review", "Time between merge request creation and merge/close"],
+                                 [:staging, "Staging", "From merge request merge until deploy to production"],
+                                 [:production, "Production", "From issue creation until deploy to production"]]
+
+    stats = cycle_analytics_view_data.reduce([]) do |stats, (stage_method, stage_text, stage_description)|
+      value = @cycle_analytics.send(stage_method).presence
+
+      stats << {
+        title: stage_text,
+        description: stage_description,
+        value: value && !value.zero? ? distance_of_time_in_words(value) : nil
+      }
+      stats
+    end
+
+    summary = [
+      { title: "New Issues", value: @cycle_analytics.summary.new_issues },
+      { title: "Commits", value: @cycle_analytics.summary.commits },
+      { title: "Deploys", value: @cycle_analytics.summary.deploys }
+    ]
+
+    {
+      summary: summary,
+      stats: stats
+    }
+  end
 end

app/helpers/cycle_analytics_helper.rb

-module CycleAnalyticsHelper
-  include ActionView::Helpers::DateHelper
-
-  def cycle_analytics_json(cycle_analytics)
-    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"],
-                                 [:test, "Test", "Total test time for all commits/merges"],
-                                 [:review, "Review", "Time between merge request creation and merge/close"],
-                                 [:staging, "Staging", "From merge request merge until deploy to production"],
-                                 [:production, "Production", "From issue creation until deploy to production"]]
-
-    stats = cycle_analytics_view_data.reduce([]) do |stats, (stage_method, stage_text, stage_description)|
-      value = cycle_analytics.send(stage_method).presence
-
-      stats << {
-        title: stage_text,
-        description: stage_description,
-        value: value && !value.zero? ? distance_of_time_in_words(value) : nil
-      }
-      stats
-    end
-
-    summary = [
-      { title: "New Issues", value: cycle_analytics.summary.new_issues },
-      { title: "Commits", value: cycle_analytics.summary.commits },
-      { title: "Deploys", value: cycle_analytics.summary.deploys }
-    ]
-
-    {
-      summary: summary,
-      stats: stats
-    }
-  end
-end