tasks: remove outdated footers in mail templates

Fix #1863

lib/tasks/deployment/20181120133842_remove_footer_from_email_templates.rake

@@ -0,0 +1,54 @@
+require Rails.root.join("lib", "tasks", "task_helper")
+
+namespace :after_party do
+  # Matches "ne pas répondre", plus some content before and after:
+  # - try to remove dashes before the footer
+  # - try to remove line-breaks and empty HTML tags before the footer text
+  # - matches "Veuillez ne pas répondre" or "Merci de ne pas répondre"
+  # - once the footer text is found, extend the match to the end of the body
+  FOOTER_REGEXP = /(—|---|-)?( |\r|\n|<br>|<p>|<\/p>|<small>|<\/small>|<b>|<\/b>|&nbsp;)*(Veuillez)?(Merci)?( |\r|\n)*(de)? ne pas répondre(.*)$/m
+  # When the footer contains any of these words, it is kept untouched.
+  FOOTER_EXCEPTIONS = [
+    'PDF',
+    '@',
+    'Hadrien',
+    'Esther',
+    'Sicoval',
+    'a323',
+    'SNC',
+    'Polynésie',
+    'drac',
+    'theplatform'
+  ]
+
+  desc 'Deployment task: remove_footer_from_email_templates'
+  task remove_footer_from_email_templates: :environment do
+    rake_puts "Running deploy task 'remove_footer_from_email_templates'"
+
+    models = [
+      Mails::ClosedMail,
+      Mails::InitiatedMail,
+      Mails::ReceivedMail,
+      Mails::RefusedMail,
+      Mails::WithoutContinuationMail
+    ]
+
+    models.each do |model_class|
+      model_class.all.find_each do |template|
+        remove_footer(template)
+      end
+    end
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord.create version: '20181120133842'
+  end # task :remove_footer_from_email_templates
+
+  def remove_footer(template)
+    matches = template.body.match(FOOTER_REGEXP)
+    if matches && FOOTER_EXCEPTIONS.none? { |exception| matches[0].include?(exception) }
+      rake_puts "#{template.model_name.to_s} \##{template.id}: removing footer"
+      template.update(body: matches.pre_match)
+    end
+  end
+end # namespace :after_party