Allow multiple queries for each cycle analytics section.

1. Pass in an array of queries - the first to return a value will be
   used. This makes it easier to add more heuristics later.

2. Convert all queries with 'or' in the title to two separate queries.

3. Rename all `mr_` methods to `merge_request_`

2 files changed, 41 insertions, 37 deletions

diff --git a/app/models/cycle_analytics.rb b/app/models/cycle_analytics.rb
index 8b791e1e9ac..34a841ff5ce 100644
--- a/app/models/cycle_analytics.rb
+++ b/app/models/cycle_analytics.rb
@@ -2,51 +2,51 @@ class CycleAnalytics
   def issue
     calculate_metric(Queries::issues,
                      -> (data_point) { data_point[:issue].created_at },
-                     Queries::issue_first_associated_with_milestone_or_first_added_to_list_label_time)
+                     [Queries::issue_first_associated_with_milestone_at, Queries::issue_first_added_to_list_label_at])
   end
 
   def plan
     calculate_metric(Queries::issues,
-                     Queries::issue_first_associated_with_milestone_or_first_added_to_list_label_time,
-                     Queries::issue_closing_merge_request_opened_time)
+                     [Queries::issue_first_associated_with_milestone_at, Queries::issue_first_added_to_list_label_at],
+                     Queries::issue_closing_merge_request_opened_at)
   end
 
   def code
     calculate_metric(Queries::merge_requests_closing_issues,
                      -> (data_point) { data_point[:merge_request].created_at },
-                     Queries::mr_wip_flag_removed_or_assigned_to_user_other_than_author_time)
+                     [Queries::merge_request_first_assigned_to_user_other_than_author_at, Queries::merge_request_wip_flag_first_removed_at])
   end
 
   def test
     calculate_metric(Queries::merge_requests_closing_issues,
-                     Queries::mr_build_started_at,
-                     Queries::mr_build_finished_at)
+                     Queries::merge_request_build_started_at,
+                     Queries::merge_request_build_finished_at)
   end
 
   def review
     calculate_metric(Queries::merge_requests_closing_issues,
-                     Queries::mr_wip_flag_removed_or_assigned_to_user_other_than_author_time,
-                     Queries::mr_first_closed_or_merged_at)
+                     [Queries::merge_request_first_assigned_to_user_other_than_author_at, Queries::merge_request_wip_flag_first_removed_at],
+                     [Queries::merge_request_first_closed_at, Queries::merge_request_merged_at])
   end
 
   def staging
     calculate_metric(Queries::merge_requests_closing_issues,
-                     Queries::mr_merged_at,
-                     Queries::mr_deployed_to_any_environment_at)
+                     Queries::merge_request_merged_at,
+                     Queries::merge_request_deployed_to_any_environment_at)
   end
 
   def production
     calculate_metric(Queries::merge_requests_closing_issues,
                      -> (data_point) { data_point[:issue].created_at },
-                     Queries::mr_deployed_to_production_at)
+                     Queries::merge_request_deployed_to_production_at)
   end
 
   private
 
-  def calculate_metric(data, start_time_fn, end_time_fn)
+  def calculate_metric(data, start_time_fns, end_time_fns)
     times = data.map do |data_point|
-      start_time = start_time_fn[data_point]
-      end_time = end_time_fn[data_point]
+      start_time = Array.wrap(start_time_fns).map { |fn| fn[data_point] }.compact.first
+      end_time = Array.wrap(end_time_fns).map { |fn| fn[data_point] }.compact.first
 
       if start_time.present? && end_time.present?
         end_time - start_time
diff --git a/app/models/cycle_analytics/queries.rb b/app/models/cycle_analytics/queries.rb
index efdacc28638..1074b62039b 100644
--- a/app/models/cycle_analytics/queries.rb
+++ b/app/models/cycle_analytics/queries.rb
@@ -12,35 +12,35 @@ class CycleAnalytics
         end.flatten
       end
 
-      def issue_first_associated_with_milestone_or_first_added_to_list_label_time
+      def issue_first_associated_with_milestone_at
         lambda do |data_point|
           issue = data_point[:issue]
-          if issue.metrics.present?
-            issue.metrics.first_associated_with_milestone_at.presence ||
-              issue.metrics.first_added_to_board_at.presence
-          end
+          issue.metrics.first_associated_with_milestone_at if issue.metrics.present?
         end
       end
 
-      def mr_first_closed_or_merged_at
+      def issue_first_added_to_list_label_at
+        lambda do |data_point|
+          issue = data_point[:issue]
+          issue.metrics.first_added_to_board_at if issue.metrics.present?
+        end
+      end
+
+      def merge_request_first_closed_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
-          if merge_request.metrics.present?
-            merge_request.metrics.merged_at.presence || merge_request.metrics.first_closed_at.presence
-          end
+          merge_request.metrics.first_closed_at if merge_request.metrics.present?
         end
       end
 
-      def mr_merged_at
+      def merge_request_merged_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
-          if merge_request.metrics.present?
-            merge_request.metrics.merged_at
-          end
+          merge_request.metrics.merged_at if merge_request.metrics.present?
         end
       end
 
-      def mr_build_started_at
+      def merge_request_build_started_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
           tip = merge_request.commits.first
@@ -51,7 +51,7 @@ class CycleAnalytics
         end
       end
 
-      def mr_build_finished_at
+      def merge_request_build_finished_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
           tip = merge_request.commits.first
@@ -62,7 +62,7 @@ class CycleAnalytics
         end
       end
 
-      def mr_deployed_to_any_environment_at
+      def merge_request_deployed_to_any_environment_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
           if merge_request.metrics.present?
@@ -73,7 +73,7 @@ class CycleAnalytics
         end
       end
 
-      def mr_deployed_to_production_at
+      def merge_request_deployed_to_production_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
           if merge_request.metrics.present?
@@ -85,7 +85,7 @@ class CycleAnalytics
         end
       end
 
-      def issue_closing_merge_request_opened_time
+      def issue_closing_merge_request_opened_at
         lambda do |data_point|
           issue = data_point[:issue]
           merge_requests = issue.closed_by_merge_requests(nil, check_if_open: false)
@@ -93,13 +93,17 @@ class CycleAnalytics
         end
       end
 
-      def mr_wip_flag_removed_or_assigned_to_user_other_than_author_time
+      def merge_request_wip_flag_first_removed_at
         lambda do |data_point|
           merge_request = data_point[:merge_request]
-          if merge_request.metrics.present?
-            merge_request.metrics.wip_flag_first_removed_at.presence ||
-              merge_request.metrics.first_assigned_to_user_other_than_author.presence
-          end
+          merge_request.metrics.wip_flag_first_removed_at if merge_request.metrics.present?
+        end
+      end
+
+      def merge_request_first_assigned_to_user_other_than_author_at
+        lambda do |data_point|
+          merge_request = data_point[:merge_request]
+          merge_request.metrics.first_assigned_to_user_other_than_author if merge_request.metrics.present?
         end
       end
     end