/**
* Get the temporary prepared edit stash key for a user
*
* This key can be used for caching prepared edits provided:
* - a) The $user was used for PST options
* - b) The parser output was made from the PST using cannonical matching options
*
* @param Title $title
* @param Content $content
* @param User $user User to get parser options from
* @return string
*/
protected static function getStashKey(Title $title, Content $content, User $user)
{
$hash = sha1(implode(':', array($content->getModel(), $content->getDefaultFormat(), sha1($content->serialize($content->getDefaultFormat())), $user->getId() ?: md5($user->getName()), $user->getId() ? $user->getDBTouched() : '-')));
return wfMemcKey('prepared-edit', md5($title->getPrefixedDBkey()), $hash);
}
