Admin tools development/Global rename/Older implementation

Global RenameUser

Goal: Create a tool that is essentially a global version of the pre-existing RenameUser extension, which allows privileged users (stewards on WMF sites) to rename global accounts.

• Requirements:
• Design / Architecture:

• Assume local login, create account, auto create account, rename of old or new name are disabled with hooks
  • If db lock is present for the username
  • If meta's object cache has a rename-key for the user
• Aquire DB locks for old and new names
• check localnames, and local `user` tables for attached wikis for new name
• Check object cache for list of wikis (previous rename failed)
  • Lock and continue if so
  • Otherwise, insert list of wikis into object cache
• Insert list of wikis into meta's object cache
• As each db renames the `user` table, update `localuser`, update meta's object cache key <= begin/commit on each?
  • If error is detected (updated rows = 0), then manually roll back. If an error happens during the rollback, quit, and admin will have to try rename again.
• After all dbs have run, rename globaluser table, add to localnames table
• For all updated wikis, add a job into the wiki's job queue.

• Deployment Plan: