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<title>[39427] branches/4.7: REST API: Require the reassign parameter when deleting users.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/39427">39427</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/39427","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>pento</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-12-02 06:58:36 +0000 (Fri, 02 Dec 2016)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Require the reassign parameter when deleting users.

When deleting a user through the WordPress admin, a specific decision is presented - whether to assign all of the user's posts to another user, or to delete all of the posts.

This change requires `reassign` as a parameter in the corresponding REST API endpoint, so that content isn't accidentally lost.

Merges <a href="https://core.trac.wordpress.org/changeset/39426">[39426]</a> to the 4.7 branch.

Props jeremyfelt.
Fixes <a href="https://core.trac.wordpress.org/ticket/39000">#39000</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches47srcwpincludesrestapiendpointsclasswprestuserscontrollerphp">branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</a></li>
<li><a href="#branches47testsphpunittestsrestapirestuserscontrollerphp">branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php</a></li>
</ul>

<h3>Property Changed</h3>
<ul>
<li><a href="#branches47">branches/4.7/</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/4.7
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/4.7 2016-12-02 06:53:59 UTC (rev 39426)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.7  2016-12-02 06:58:36 UTC (rev 39427)
</ins><a id="branches47"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/4.7</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.1:18031
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.3:20543
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:18512,39365,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39419,39424
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,39365,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39419,39424,39426
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches47srcwpincludesrestapiendpointsclasswprestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php        2016-12-02 06:53:59 UTC (rev 39426)
+++ branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php  2016-12-02 06:58:36 UTC (rev 39427)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -92,6 +92,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'reassign' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                'type'        => 'integer',
</span><span class="cx" style="display: block; padding: 0 10px">                                                'description' => __( 'Reassign the deleted user\'s posts and links to this user ID.' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                'required'    => true,
+                                               'sanitize_callback' => array( $this, 'check_reassign' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                         ),
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -125,6 +127,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'reassign' => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                                'type'        => 'integer',
</span><span class="cx" style="display: block; padding: 0 10px">                                                'description' => __( 'Reassign the deleted user\'s posts and links to this user ID.' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                'required'    => true,
+                                               'sanitize_callback' => array( $this, 'check_reassign' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                         ),
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                        ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -133,6 +137,31 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Checks for a valid value for the reassign parameter when deleting users.
+        *
+        * The value can be an integer, 'false', false, or ''.
+        *
+        * @since 4.7.0
+        *
+        * @param int|bool        $value   The value passed to the reassign parameter.
+        * @param WP_REST_Request $request Full details about the request.
+        * @param string          $param   The parameter that is being sanitized.
+        *
+        * @return int|bool|WP_Error
+        */
+       public function check_reassign( $value, $request, $param ) {
+               if ( is_numeric( $value ) ) {
+                       return $value;
+               }
+
+               if ( empty( $value ) || false === $value || 'false' === $value ) {
+                       return false;
+               }
+
+               return new WP_Error( 'rest_invalid_param', __( 'Invalid user parameter(s).' ), array( 'status' => 400 ) );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Permissions check for getting all users.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.7.0
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -673,7 +702,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function delete_item( $request ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $id       = (int) $request['id'];
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $reassign = isset( $request['reassign'] ) ? absint( $request['reassign'] ) : null;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $reassign = false === $request['reassign'] ? null : absint( $request['reassign'] );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $force    = isset( $request['force'] ) ? (bool) $request['force'] : false;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // We don't support trashing for users.
</span></span></pre></div>
<a id="branches47testsphpunittestsrestapirestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php       2016-12-02 06:53:59 UTC (rev 39426)
+++ branches/4.7/tests/phpunit/tests/rest-api/rest-users-controller.php 2016-12-02 06:58:36 UTC (rev 39427)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1639,7 +1639,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $userdata = get_userdata( $user_id ); // cache for later
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $request['force'] = true;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $request->set_param( 'force', true );
+               $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( 200, $response->get_status() );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1657,6 +1658,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $userdata = get_userdata( $user_id ); // cache for later
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_trash_not_supported', $response, 501 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1678,6 +1680,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', '/wp/v2/users/me' );
</span><span class="cx" style="display: block; padding: 0 10px">                $request['force'] = true;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( 200, $response->get_status() );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1694,6 +1697,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                update_site_option( 'site_admins', array( $user->user_login ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', '/wp/v2/users/me' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_trash_not_supported', $response, 501 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1714,12 +1718,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
</span><span class="cx" style="display: block; padding: 0 10px">                $request['force'] = true;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_user_cannot_delete', $response, 403 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', '/wp/v2/users/me' );
</span><span class="cx" style="display: block; padding: 0 10px">                $request['force'] = true;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_user_cannot_delete', $response, 403 );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1731,6 +1737,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'DELETE', '/wp/v2/users/100' );
</span><span class="cx" style="display: block; padding: 0 10px">                $request['force'] = true;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $request->set_param( 'reassign', false );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $response = $this->server->dispatch( $request );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_user_invalid_id', $response, 404 );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1778,6 +1785,96 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_user_invalid_reassign', $response, 400 );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        public function test_delete_user_invalid_reassign_passed_as_string() {
+               $user_id = $this->factory->user->create();
+
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request['force'] = true;
+               $request->set_param( 'reassign', 'null' );
+               $response = $this->server->dispatch( $request );
+
+               $this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
+       }
+
+       public function test_delete_user_reassign_passed_as_boolean_false_trashes_post() {
+               $user_id = $this->factory->user->create();
+
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $test_post = $this->factory->post->create(array(
+                       'post_author' => $user_id,
+               ));
+
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request['force'] = true;
+               $request->set_param( 'reassign', false );
+               $this->server->dispatch( $request );
+
+               $test_post = get_post( $test_post );
+               $this->assertEquals( 'trash', $test_post->post_status );
+       }
+
+       public function test_delete_user_reassign_passed_as_string_false_trashes_post() {
+               $user_id = $this->factory->user->create();
+
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $test_post = $this->factory->post->create(array(
+                       'post_author' => $user_id,
+               ));
+
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request['force'] = true;
+               $request->set_param( 'reassign', 'false' );
+               $this->server->dispatch( $request );
+
+               $test_post = get_post( $test_post );
+               $this->assertEquals( 'trash', $test_post->post_status );
+       }
+
+       public function test_delete_user_reassign_passed_as_empty_string_trashes_post() {
+               $user_id = $this->factory->user->create();
+
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $test_post = $this->factory->post->create(array(
+                       'post_author' => $user_id,
+               ));
+
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request['force'] = true;
+               $request->set_param( 'reassign', '' );
+               $this->server->dispatch( $request );
+
+               $test_post = get_post( $test_post );
+               $this->assertEquals( 'trash', $test_post->post_status );
+       }
+
+       public function test_delete_user_reassign_passed_as_0_reassigns_author() {
+               $user_id = $this->factory->user->create();
+
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $test_post = $this->factory->post->create(array(
+                       'post_author' => $user_id,
+               ));
+
+               $request = new WP_REST_Request( 'DELETE', sprintf( '/wp/v2/users/%d', $user_id ) );
+               $request['force'] = true;
+               $request->set_param( 'reassign', 0 );
+               $this->server->dispatch( $request );
+
+               $test_post = get_post( $test_post );
+               $this->assertEquals( 0, $test_post->post_author );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_get_item_schema() {
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'OPTIONS', '/wp/v2/users' );
</span><span class="cx" style="display: block; padding: 0 10px">                $response = $this->server->dispatch( $request );
</span></span></pre>
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