preload ids or objects for users, merge request and issues

lib/gitlab/cycle_analytics/author_updater.rb

+module Gitlab
+  module CycleAnalytics
+    class AuthorUpdater
+      def self.update!(*args)
+        new(*args).update!
+      end
+
+      def initialize(event_result)
+        @event_result = event_result
+      end
+
+      def update!
+        @event_result.each do |event|
+          event['author'] = users[event.delete('author_id').to_i].first
+        end
+      end
+
+      def user_ids
+        @event_result.map { |event| event['author_id'] }
+      end
+
+      def users
+        @users ||= User.find(user_ids).group_by { |user| user['id'] }
+      end
+    end
+  end
+end

lib/gitlab/cycle_analytics/base_event.rb

@@ -12,7 +12,9 @@ module Gitlab
       end
 
       def fetch
-        @query.execute(self).map do |event|
+        update_author! if event_result.first['author_id']
+
+        event_result.map do |event|
           serialize(event) if has_permission?(event['id'])
         end
       end
@@ -25,12 +27,28 @@ module Gitlab
 
       private
 
+      def update_author!
+        AuthorUpdater.update!(event_result)
+      end
+
+      def event_result
+        @event_result ||= @query.execute(self).to_a
+      end
+
       def serialize(_event)
         raise NotImplementedError.new("Expected #{self.name} to implement serialize(event)")
       end
 
-      def has_permission?(_id)
-        true
+      def has_permission?(id)
+        allowed_ids.nil? || allowed_ids.include?(id.to_i)
+      end
+
+      def allowed_ids
+        nil
+      end
+
+      def event_result_ids
+        event_result.map { |event| event['id'] }
       end
     end
   end

lib/gitlab/cycle_analytics/code_event.rb

@@ -19,13 +19,11 @@ module Gitlab
       private
 
       def serialize(event)
-        event['author'] = User.find(event.delete('author_id'))
-
         AnalyticsMergeRequestSerializer.new(project: @project).represent(event).as_json
       end
 
-      def has_permission?(id)
-        @options[:current_user].can?(:read_merge_request, MergeRequest.find(id))
+      def allowed_ids
+        @allowed_ids ||= MergeRequestsFinder.new(@options[:current_user], project_id: @project.id).execute.where(id: event_result_ids).pluck(:id)
       end
     end
   end

lib/gitlab/cycle_analytics/issue_event.rb

@@ -18,13 +18,11 @@ module Gitlab
       private
 
       def serialize(event)
-        event['author'] = User.find(event.delete('author_id'))
-
         AnalyticsIssueSerializer.new(project: @project).represent(event).as_json
       end
 
-      def has_permission?(id)
-        @options[:current_user].can?(:read_issue, Issue.find(id))
+      def allowed_ids
+        @allowed_ids ||= IssuesFinder.new(@options[:current_user], project_id: @project.id).execute.where(id: event_result_ids).pluck(:id)
       end
     end
   end

lib/gitlab/cycle_analytics/production_event.rb

@@ -17,13 +17,11 @@ module Gitlab
       private
 
       def serialize(event)
-        event['author'] = User.find(event.delete('author_id'))
-
         AnalyticsIssueSerializer.new(project: @project).represent(event).as_json
       end
 
-      def has_permission?(id)
-        @options[:current_user].can?(:read_issue, Issue.find(id))
+      def allowed_ids
+        @allowed_ids ||= IssuesFinder.new(@options[:current_user], project_id: @project.id).execute.where(id: event_result_ids).pluck(:id)
       end
     end
   end

lib/gitlab/cycle_analytics/review_event.rb

@@ -16,13 +16,11 @@ module Gitlab
       end
 
       def serialize(event)
-        event['author'] = User.find(event.delete('author_id'))
-
         AnalyticsMergeRequestSerializer.new(project: @project).represent(event).as_json
       end
 
-      def has_permission?(id)
-        @options[:current_user].can?(:read_merge_request, MergeRequest.find(id))
+      def allowed_ids
+        @allowed_ids ||= MergeRequestsFinder.new(@options[:current_user], project_id: @project.id).execute.where(id: event_result_ids).pluck(:id)
       end
     end
   end