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<title>[39446] branches/4.7: REST API: Fix bug where comment author and author email could be an empty string when creating a comment.</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/39446">39446</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/39446","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>rachelbaker</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-12-02 22:45:06 +0000 (Fri, 02 Dec 2016)</dd>
</dl>

<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: Fix bug where comment author and author email could be an empty string when creating a comment.

If the `require_name_email` option is true, creating a comment with an empty string for the author name or email should not be accepted.  Both values can be an empty string on update.

Merges <a href="https://core.trac.wordpress.org/changeset/39444">[39444]</a> into the 4.7 branch.
Props flixos90, hnle, dd32, rachelbaker, jnylen0, ChopinBach, joehoyle, pento.

Fixes <a href="https://core.trac.wordpress.org/ticket/38971">#38971</a> for 4.7.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches47srcwpincludesrestapiendpointsclasswprestcommentscontrollerphp">branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php</a></li>
<li><a href="#branches47testsphpunittestsrestapirestcommentscontrollerphp">branches/4.7/tests/phpunit/tests/rest-api/rest-comments-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 22:43:52 UTC (rev 39445)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.7  2016-12-02 22:45:06 UTC (rev 39446)
</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:18512,39365,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39443
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,39365,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches47srcwpincludesrestapiendpointsclasswprestcommentscontrollerphp"></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-comments-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-comments-controller.php     2016-12-02 22:43:52 UTC (rev 39445)
+++ branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php       2016-12-02 22:45:06 UTC (rev 39446)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -508,17 +508,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Honor the discussion setting that requires a name and email address of the comment author.
</span><span class="cx" style="display: block; padding: 0 10px">                if ( get_option( 'require_name_email' ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! isset( $prepared_comment['comment_author'] ) && ! isset( $prepared_comment['comment_author_email'] ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( empty( $prepared_comment['comment_author'] ) || empty( $prepared_comment['comment_author_email'] ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 return new WP_Error( 'rest_comment_author_data_required', __( 'Creating a comment requires valid author name and email values.' ), array( 'status' => 400 ) );
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                       if ( ! isset( $prepared_comment['comment_author'] ) ) {
-                               return new WP_Error( 'rest_comment_author_required', __( 'Creating a comment requires a valid author name.' ), array( 'status' => 400 ) );
-                       }
-
-                       if ( ! isset( $prepared_comment['comment_author_email'] ) ) {
-                               return new WP_Error( 'rest_comment_author_email_required', __( 'Creating a comment requires a valid author email.' ), array( 'status' => 400 ) );
-                       }
</del><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">                if ( ! isset( $prepared_comment['comment_author_email'] ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1155,6 +1147,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        'type'         => 'string',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'format'       => 'email',
</span><span class="cx" style="display: block; padding: 0 10px">                                        'context'      => array( 'edit' ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                        'arg_options'  => array(
+                                               'sanitize_callback' => array( $this, 'check_comment_author_email' ),
+                                               'validate_callback' => null, // skip built-in validation of 'email'.
+                                       ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                 ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'author_ip'     => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'description'  => __( 'IP address for the object author.' ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1581,4 +1577,33 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                return current_user_can( 'edit_comment', $comment->comment_ID );
</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 a comment author email for validity.
+        *
+        * Accepts either a valid email address or empty string as a valid comment
+        * author email address. Setting the comment author email to an empty
+        * string is allowed when a comment is being updated.
+        *
+        * @since 4.7.0
+        *
+        * @param string          $value   Author email value submitted.
+        * @param WP_REST_Request $request Full details about the request.
+        * @param string          $param   The parameter name.
+        * @return WP_Error|string The sanitized email address, if valid,
+        *                         otherwise an error.
+        */
+       public function check_comment_author_email( $value, $request, $param ) {
+               $email = (string) $value;
+               if ( empty( $email ) ) {
+                       return $email;
+               }
+
+               $check_email = rest_validate_request_arg( $email, $request, $param );
+               if ( is_wp_error( $check_email ) ) {
+                       return $check_email;
+               }
+
+               return $email;
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="branches47testsphpunittestsrestapirestcommentscontrollerphp"></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-comments-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-comments-controller.php    2016-12-02 22:43:52 UTC (rev 39445)
+++ branches/4.7/tests/phpunit/tests/rest-api/rest-comments-controller.php      2016-12-02 22:45:06 UTC (rev 39446)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -97,10 +97,6 @@
</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><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function tearDown() {
-               parent::tearDown();
-       }
-
</del><span class="cx" style="display: block; padding: 0 10px">         public function test_register_routes() {
</span><span class="cx" style="display: block; padding: 0 10px">                $routes = $this->server->get_routes();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -987,13 +983,14 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $params['content']['raw'], $new_comment->comment_content );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function test_create_comment_missing_required_author_name_and_email_per_option_value() {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function test_create_comment_missing_required_author_name() {
</ins><span class="cx" style="display: block; padding: 0 10px">                 add_filter( 'rest_allow_anonymous_comments', '__return_true' );
</span><span class="cx" style="display: block; padding: 0 10px">                update_option( 'require_name_email', 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $params = array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'post'    => self::$post_id,
-                       'content' => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'post'         => self::$post_id,
+                       'author_email' => 'ekrabappel@springfield-elementary.edu',
+                       'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
</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">                $request = new WP_REST_Request( 'POST', '/wp/v2/comments' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1003,17 +1000,16 @@
</span><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_comment_author_data_required', $response, 400 );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-               update_option( 'require_name_email', 0 );
</del><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function test_create_comment_missing_required_author_name_per_option_value() {
-               wp_set_current_user( self::$admin_id );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function test_create_comment_empty_required_author_name() {
+               add_filter( 'rest_allow_anonymous_comments', '__return_true' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 update_option( 'require_name_email', 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $params = array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'author_name'  => '',
+                       'author_email' => 'ekrabappel@springfield-elementary.edu',
</ins><span class="cx" style="display: block; padding: 0 10px">                         'post'         => self::$post_id,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'author_email' => 'ekrabappel@springfield-elementary.edu',
</del><span class="cx" style="display: block; padding: 0 10px">                         'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
</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">@@ -1022,12 +1018,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_body( wp_json_encode( $params ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $response = $this->server->dispatch( $request );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->assertErrorResponse( 'rest_comment_author_required', $response, 400 );
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                update_option( 'require_name_email', 0 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->assertErrorResponse( 'rest_comment_author_data_required', $response, 400 );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function test_create_comment_missing_required_author_email_per_option_value() {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function test_create_comment_missing_required_author_email() {
</ins><span class="cx" style="display: block; padding: 0 10px">                 wp_set_current_user( self::$admin_id );
</span><span class="cx" style="display: block; padding: 0 10px">                update_option( 'require_name_email', 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1042,9 +1037,26 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_body( wp_json_encode( $params ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $response = $this->server->dispatch( $request );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->assertErrorResponse( 'rest_comment_author_email_required', $response, 400 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->assertErrorResponse( 'rest_comment_author_data_required', $response, 400 );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                update_option( 'require_name_email', 0 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function test_create_comment_empty_required_author_email() {
+               wp_set_current_user( self::$admin_id );
+               update_option( 'require_name_email', 1 );
+
+               $params = array(
+                       'post'         => self::$post_id,
+                       'author_name'  => 'Edna Krabappel',
+                       'author_email' => '',
+                       'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
+               );
+
+               $request = new WP_REST_Request( 'POST', '/wp/v2/comments' );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertErrorResponse( 'rest_comment_author_data_required', $response, 400 );
</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">        public function test_create_comment_author_email_too_short() {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1992,6 +2004,100 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $params['date_gmt'], mysql_to_rfc3339( $updated->comment_date_gmt ) );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        public function test_update_comment_author_email_only() {
+               wp_set_current_user( self::$editor_id );
+               update_option( 'require_name_email', 1 );
+
+               $params = array(
+                       'post'         => self::$post_id,
+                       'author_email' => 'ekrabappel@springfield-elementary.edu',
+                       'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
+               );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/comments/%d', self::$approved_id ) );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+       }
+
+       public function test_update_comment_empty_author_name() {
+               wp_set_current_user( self::$editor_id );
+               update_option( 'require_name_email', 1 );
+
+               $params = array(
+                       'author_name'  => '',
+                       'author_email' => 'ekrabappel@springfield-elementary.edu',
+                       'post'         => self::$post_id,
+                       'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
+               );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/comments/%d', self::$approved_id ) );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+       }
+
+       public function test_update_comment_author_name_only() {
+               wp_set_current_user( self::$admin_id );
+               update_option( 'require_name_email', 1 );
+
+               $params = array(
+                       'post'        => self::$post_id,
+                       'author_name' => 'Edna Krabappel',
+                       'content'     => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
+               );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/comments/%d', self::$approved_id ) );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+       }
+
+       public function test_update_comment_empty_author_email() {
+               wp_set_current_user( self::$admin_id );
+               update_option( 'require_name_email', 1 );
+
+               $params = array(
+                       'post'         => self::$post_id,
+                       'author_name'  => 'Edna Krabappel',
+                       'author_email' => '',
+                       'content'      => 'Now, I don\'t want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.',
+               );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/comments/%d', self::$approved_id ) );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+       }
+
+       public function test_update_comment_author_email_too_short() {
+               wp_set_current_user( self::$admin_id );
+
+               $params = array(
+                       'post'         => self::$post_id,
+                       'author_name'  => 'Homer J. Simpson',
+                       'author_email' => 'a@b',
+                       'content'      => 'in this house, we obey the laws of thermodynamics!',
+               );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/comments/%d', self::$approved_id ) );
+               $request->add_header( 'content-type', 'application/json' );
+               $request->set_body( wp_json_encode( $params ) );
+               $response = $this->server->dispatch( $request );
+
+               $this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
+               $data = $response->get_data();
+               $this->assertArrayHasKey( 'author_email', $data['data']['params'] );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_update_comment_invalid_type() {
</span><span class="cx" style="display: block; padding: 0 10px">                wp_set_current_user( self::$admin_id );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
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