Rake task to conform person emails with lottery applicant emails

lib/tasks/maintenance/historical_facts_conform_applicant_emails.rake

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+# frozen_string_literal: true
+
+namespace :maintenance do
+  desc "Changes people emails to match historical facts emails for lottery applicants"
+  task historical_facts_conform_applicant_emails: :environment do
+    puts "Conforming people emails to match historical facts emails for lottery applicants"
+
+    people = Person.joins(:historical_facts)
+      .where(historical_facts: { kind: :lottery_application} )
+      .where("historical_facts.email is not null and historical_facts.email <> people.email")
+      .distinct
+    person_count = people.count
+
+    puts "Found #{person_count} people to update"
+
+    progress_bar = ::ProgressBar.new(person_count)
+
+    people.find_each do |person|
+      progress_bar.increment!
+
+      if person.user_id?
+        puts "Person #{person.id} has an associated user; skipping"
+        next
+      end
+
+      fact = person.historical_facts.find_by(kind: :lottery_application)
+      person.update(email: fact.email)
+    rescue ActiveRecordError => e
+      puts "Could not update record for Person id: #{person.id}"
+      puts e
+    end
+  end
+end