Multisite: Introduce a can_add_user_to_blog filter to prevent adding a user to a site.

Under certain circumstances, it can be necessary that a user should not be added to a site, beyond the restrictions that WordPress core applies. With the new `can_add_user_to_blog` filter, plugin developers can run custom checks and return an error in case of a failure, that will prevent the user from being added.

The user-facing parts and the REST API route that interact with `add_user_to_blog()` have been adjusted accordingly to provide appropriate error feedback when a user could not be added to a site. Furthermore, two existing error feedback messages in the site admin's "New User" screen have been adjusted to properly show inside an error notice instead of a success notice.

Props jmdodd.
Fixes #41101.


git-svn-id: https://develop.svn.wordpress.org/trunk@41225 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
flixos90
2017-08-03 21:40:02 +00:00
parent 814e1f5530
commit 0dc1e0633b
6 changed files with 146 additions and 33 deletions

View File

@@ -492,7 +492,10 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
return $user_id;
}
add_user_to_blog( get_site()->id, $user_id, '' );
$result= add_user_to_blog( get_site()->id, $user_id, '' );
if ( is_wp_error( $result ) ) {
return $result;
}
} else {
$user_id = wp_insert_user( wp_slash( (array) $user ) );