added repeat customer report class

lib/tasks/reports/author_reports.rb

@@ -0,0 +1,83 @@
+require 'byebug'
+require 'csv'
+
+module Tasks
+  module Reports
+    class AuthorReports
+      # rubocop:disable Metrics/MethodLength, Metrics/AbcSize
+      def self.repeat_customers
+        CSV.open(File.join(Rails.root.join('tmp'), "Repeat_Customers_Report-#{Time.now.strftime('%Y-%m-%d')}.csv"), 'wb') do |csv|
+          csv << ['Report', 'Submitters', ' Multiple times Submitters', 'Coauthors', 'Multiple times Coauthors', 'Percent', 'Average']
+
+          # 1. Submitting authors who submitted in the past
+
+          submitters = StashEngine::Resource.latest_per_dataset.group(:user_id).count
+          resubmitters = submitters.select { |_k, v| v > 1 }
+          percent_of_resubmitters = (resubmitters.count * 100) / submitters.count
+
+          avg_submissions_per_submitter = submitters.values.sum / submitters.count.to_f
+          avg_submissions_per_resubmitter = resubmitters.values.sum / resubmitters.count.to_f
+
+          csv << ['Submitting authors who submitted in the past', submitters.count, resubmitters.count, nil, nil, percent_of_resubmitters.round(2)]
+
+          # 2. Submitting authors who coauthored in the past
+
+          res = ActiveRecord::Base.connection.execute <<~SQL
+            select  count(distinct(users.orcid))
+            from stash_engine_users as users
+            inner join stash_engine_resources as user_res on user_res.user_id = users.id
+            INNER JOIN stash_engine_identifiers ON user_res.id = stash_engine_identifiers.latest_resource_id
+            inner join stash_engine_authors as user_author on user_author.author_orcid = users.orcid and user_res.id != user_author.resource_id
+            inner join stash_engine_resources as author_res on user_author.resource_id=author_res.id
+            where user_res.created_at > author_res.created_at
+          SQL
+          submitters_as_coauthors = res.first[0]
+          submitters_orcid = StashEngine::Resource.latest_per_dataset.joins(:user).distinct.select(:orcid).count
+
+          percent_submissions_per_author = (submitters_as_coauthors * 100) / submitters_orcid.to_f
+
+          csv << ['Submitting authors who coauthored in the past', submitters_orcid, nil, submitters_as_coauthors, nil,
+                  percent_submissions_per_author.round(2)]
+
+          # 3. Coauthors who submitted in the past
+          # Same as above with different date condition direction
+
+          res = ActiveRecord::Base.connection.execute <<~SQL
+            select  count(distinct(users.orcid))
+            from stash_engine_users as users
+            inner join stash_engine_resources as user_res on user_res.user_id = users.id
+            INNER JOIN stash_engine_identifiers ON user_res.id = stash_engine_identifiers.latest_resource_id
+            inner join stash_engine_authors as user_author on user_author.author_orcid = users.orcid and user_res.id != user_author.resource_id
+            inner join stash_engine_resources as author_res on user_author.resource_id=author_res.id
+            where user_res.created_at < author_res.created_at
+          SQL
+          submitters_as_coauthors = res.first[0]
+          submitters_orcid = StashEngine::Resource.latest_per_dataset.joins(:user).distinct.select(:orcid).count
+
+          percent_submissions_per_author = (submitters_as_coauthors * 100) / submitters_orcid.to_f
+
+          csv << ['Coauthors who submitted in the past', submitters_orcid, nil, submitters_as_coauthors, nil, percent_submissions_per_author.round(2)]
+
+          # 4. Coauthors who coauthored in the past
+
+          coauthors = StashEngine::Author.unscoped.joins(resource: %i[user identifier])
+            .where('orcid != author_orcid')
+            .distinct.select(:author_orcid, :identifier)
+            .group(
+              :author_orcid, :identifier
+            ).count
+          multiple_times_coauthors = coauthors.keys.map(&:first).tally.select { |_k, val| val > 1 }.count
+          percent_multiple_times_coauthors = (multiple_times_coauthors * 100) / coauthors.count.to_f
+
+          csv << ['Coauthors who coauthored in the past', nil, nil, coauthors.count, multiple_times_coauthors,
+                  percent_multiple_times_coauthors.round(2)]
+
+          csv << ['Average number of submissions per author (submitting author)', nil, nil, nil, nil, nil, avg_submissions_per_submitter.round(2)]
+          csv << ['Average number of submissions per author (resubmitting author)', nil, nil, nil, nil, nil, avg_submissions_per_resubmitter.round(2)]
+        end
+      end
+
+      # rubocop:enable Metrics/MethodLength, Metrics/AbcSize
+    end
+  end
+end