Report about druids lacking a public json record in purl-fetcher's db (…

…#5182)

* Report on druids lacking public cocina

app/reports/publish_status.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+# Exports publish information about druids lacking public cocina.
+#   https://github.com/sul-dlss/dor-services-app/issues/5181
+# Input is a CSV of druids generated on purl-fetcher with the query:
+#   Purl.status('public').where.missing(:public_json).pluck(:druid)
+# Invoke via:
+# bin/rails r -e production "PublishStatus.report('druids.csv')"
+class PublishStatus
+  def self.report(druids_file)
+    druids = File.readlines(druids_file).map(&:strip)
+    output_file = 'tmp/publish_status_report.csv'
+
+    CSV.open(output_file, 'w') do |csv|
+      csv << %w[druid closed publishable not_dark first_published]
+
+      druids.each do |druid|
+        object = RepositoryObject.find_by(external_identifier: druid)
+        latest = object.head_version
+        not_dark = latest.access.fetch('view') != 'dark'
+
+        milestones = workflow_client.milestones(druid:)
+        # to determine if this was published before versioning changes took effect, get the date of the first published milestone
+        published = milestones.filter { |milestone| milestone[:version] == '1' && milestone[:milestone] == 'published' }
+        date = published.first[:at] if published.any?
+
+        csv << [druid, object.closed?, object.publishable?, not_dark, date]
+      end
+      puts "Report written to #{output_file}"
+    end
+  end
+
+  def self.workflow_client
+    @workflow_client ||= WorkflowClientFactory.build
+  end
+end