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

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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
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26
tests/phpunit/tests/user/multisite.php
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@@ -397,6 +397,32 @@ class Tests_Multisite_User extends WP_UnitTestCase {
$this->assertWPError( $result );
}
/**
* @ticket 41101
*/
public function test_should_fail_can_add_user_to_blog_filter() {
$site_id = self::factory()->blog->create();
$user_id = self::factory()->user->create();
add_filter( 'can_add_user_to_blog', '__return_false' );
$result = add_user_to_blog( $site_id, $user_id, 'subscriber' );
$this->assertWPError( $result );
}
/**
* @ticket 41101
*/
public function test_should_succeed_can_add_user_to_blog_filter() {
$site_id = self::factory()->blog->create();
$user_id = self::factory()->user->create();
add_filter( 'can_add_user_to_blog', '__return_true' );
$result = add_user_to_blog( $site_id, $user_id, 'subscriber' );
$this->assertTrue( $result );
}
/**
* @ticket 23016
*/