REST API: Increase the specificity of capability checks for collections when the edit context is in use.

The edit access in now taken into account for each individual post, term, or user in the response.

Merges [60814] into the 6.8 branch.

Props andraganescu, desrosj, ehti, hurayraiit, iandunn, joehoyle, johnbillion, jorbin, mnelson4, noisysocks, peterwilsoncc, rmccue, timothyblynjacobs, vortfu, whyisjake, zieladam.

git-svn-id: https://develop.svn.wordpress.org/branches/6.8@60817 602fd350-edb4-49c9-b593-d223f7449a82

Author: johnbillion

src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php

@@ -463,7 +463,13 @@ static function ( $format ) {
 			}
 
 			foreach ( $query_result as $post ) {
-				if ( ! $this->check_read_permission( $post ) ) {
+				if ( 'edit' === $request['context'] ) {
+					$permission = $this->check_update_permission( $post );
+				} else {
+					$permission = $this->check_read_permission( $post );
+				}
+
+				if ( ! $permission ) {
 					continue;
 				}
 

src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php

@@ -365,6 +365,10 @@ public function get_items( $request ) {
 		if ( ! $is_head_request ) {
 			$response = array();
 			foreach ( $query_result as $term ) {
+				if ( 'edit' === $request['context'] && ! current_user_can( 'edit_term', $term->term_id ) ) {
+					continue;
+				}
+
 				$data       = $this->prepare_item_for_response( $term, $request );
 				$response[] = $this->prepare_response_for_collection( $data );
 			}

src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -220,7 +220,7 @@ public function get_items_permissions_check( $request ) {
 		if ( 'edit' === $request['context'] && ! current_user_can( 'list_users' ) ) {
 			return new WP_Error(
 				'rest_forbidden_context',
-				__( 'Sorry, you are not allowed to list users.' ),
+				__( 'Sorry, you are not allowed to edit users.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
@@ -379,6 +379,10 @@ static function ( $column ) use ( $search_columns_mapping ) {
 			$users = array();
 
 			foreach ( $query->get_results() as $user ) {
+				if ( 'edit' === $request['context'] && ! current_user_can( 'edit_user', $user->ID ) ) {
+					continue;
+				}
+
 				$data    = $this->prepare_item_for_response( $user, $request );
 				$users[] = $this->prepare_response_for_collection( $data );
 			}
@@ -479,13 +483,15 @@ public function get_item_permissions_check( $request ) {
 			return true;
 		}
 
-		if ( 'edit' === $request['context'] && ! current_user_can( 'list_users' ) ) {
+		if ( 'edit' === $request['context'] && ! current_user_can( 'edit_user', $user->ID ) ) {
 			return new WP_Error(
-				'rest_user_cannot_view',
-				__( 'Sorry, you are not allowed to list users.' ),
+				'rest_forbidden_context',
+				__( 'Sorry, you are not allowed to edit this user.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
-		} elseif ( ! count_user_posts( $user->ID, $types ) && ! current_user_can( 'edit_user', $user->ID ) && ! current_user_can( 'list_users' ) ) {
+		}
+
+		if ( ! current_user_can( 'edit_user', $user->ID ) && ! current_user_can( 'list_users' ) && ! count_user_posts( $user->ID, $types ) ) {
 			return new WP_Error(
 				'rest_user_cannot_view',
 				__( 'Sorry, you are not allowed to list users.' ),
@@ -1086,7 +1092,7 @@ public function prepare_item_for_response( $item, $request ) {
 			$data['slug'] = $user->user_nicename;
 		}
 
-		if ( in_array( 'roles', $fields, true ) ) {
+		if ( in_array( 'roles', $fields, true ) && ( current_user_can( 'list_users' ) || current_user_can( 'edit_user', $user->ID ) ) ) {
 			// Defensively call array_values() to ensure an array is returned.
 			$data['roles'] = array_values( $user->roles );
 		}

tests/phpunit/tests/rest-api/rest-users-controller.php

@@ -1311,7 +1311,7 @@ public function test_get_item_published_author_wrong_context() {
 		$request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/users/%d', $author_id ) );
 		$request->set_param( 'context', 'edit' );
 		$response = rest_get_server()->dispatch( $request );
-		$this->assertErrorResponse( 'rest_user_cannot_view', $response, 401 );
+		$this->assertErrorResponse( 'rest_forbidden_context', $response, 401 );
 	}
 
 	/**