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This task is about the Newsletter extension, and you can find the change in question at https://gerrit.wikimedia.org/r/#/c/320370/ which needs rework.

Your task is to complete the work in Change:320370 which is to implement undelete feature for Newsletters from deletion logs.

Original task description:

Steps to reproduce:

• Create a newsletter
• Delete the newsletter
• Try undeleting/restoring it from Special:Undelete or the logs. You would have a URL which ends up like title=Special:Undelete&action=submit How to fix: A minor implmentation is there in https://gerrit.wikimedia.org/r/#/c/295670/27/extension.json.

You would want to:

• Implement the hook, catch the newsletter which is getting undeleted set the inactive flag to active in nl_newsletters. You will need a new function in NewsletterDb, which looks something like deleteNewsletter, but doing the opposite.

Currently it just shows up a 404 error: Fatal error: Call to a member function getName() on null in /var/www/core/core/extensions/Newsletter/includes/content/NewsletterContent.php on line 143

NOTE: Please go through https://www.mediawiki.org/wiki/Gerrit/Tutorial#Amending_a_change_.28your_own_or_someone_else.27s.29 and learn how to amend an existing Gerrit change. Do not create a "separate" new changeset.