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<title>[34799] trunk/src: Abstract functionality from `wp-comments-post.php` into a function, `wp_handle_comment_submission()`.</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/34799">34799</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/34799","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-10-03 14:46:09 +0000 (Sat, 03 Oct 2015)</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'>Abstract functionality from `wp-comments-post.php` into a function, `wp_handle_comment_submission()`.

Add unit tests.

Props johnbillion.
Fixes <a href="https://core.trac.wordpress.org/ticket/34059">#34059</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpcommentspostphp">trunk/src/wp-comments-post.php</a></li>
<li><a href="#trunksrcwpincludescommentfunctionsphp">trunk/src/wp-includes/comment-functions.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpcommentspostphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-comments-post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-comments-post.php    2015-10-03 14:08:43 UTC (rev 34798)
+++ trunk/src/wp-comments-post.php      2015-10-03 14:46:09 UTC (rev 34799)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -17,130 +17,18 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> nocache_headers();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-$comment_post_ID = isset($_POST['comment_post_ID']) ? (int) $_POST['comment_post_ID'] : 0;
-
-$post = get_post($comment_post_ID);
-
-if ( empty( $post->comment_status ) ) {
-       /**
-        * Fires when a comment is attempted on a post that does not exist.
-        *
-        * @since 1.5.0
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'comment_id_not_found', $comment_post_ID );
-       exit;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+$comment = wp_handle_comment_submission( wp_unslash( $_POST ) );
+if ( is_wp_error( $comment ) ) {
+       $data = $comment->get_error_data();
+       if ( ! empty( $data ) ) {
+               wp_die( $comment->get_error_message(), $data );
+       } else {
+               exit;
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-// get_post_status() will get the parent status for attachments.
-$status = get_post_status($post);
-
-$status_obj = get_post_status_object($status);
-
-if ( ! comments_open( $comment_post_ID ) ) {
-       /**
-        * Fires when a comment is attempted on a post that has comments closed.
-        *
-        * @since 1.5.0
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'comment_closed', $comment_post_ID );
-       wp_die( __( 'Sorry, comments are closed for this item.' ), 403 );
-} elseif ( 'trash' == $status ) {
-       /**
-        * Fires when a comment is attempted on a trashed post.
-        *
-        * @since 2.9.0
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'comment_on_trash', $comment_post_ID );
-       exit;
-} elseif ( ! $status_obj->public && ! $status_obj->private ) {
-       /**
-        * Fires when a comment is attempted on a post in draft mode.
-        *
-        * @since 1.5.1
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'comment_on_draft', $comment_post_ID );
-       exit;
-} elseif ( post_password_required( $comment_post_ID ) ) {
-       /**
-        * Fires when a comment is attempted on a password-protected post.
-        *
-        * @since 2.9.0
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'comment_on_password_protected', $comment_post_ID );
-       exit;
-} else {
-       /**
-        * Fires before a comment is posted.
-        *
-        * @since 2.8.0
-        *
-        * @param int $comment_post_ID Post ID.
-        */
-       do_action( 'pre_comment_on_post', $comment_post_ID );
-}
-
-$comment_author       = ( isset( $_POST['author'] ) && is_string( $_POST['author'] ) ) ? trim( strip_tags( $_POST['author'] ) ) : null;
-$comment_author_email = ( isset( $_POST['email'] ) && is_string( $_POST['email'] ) ) ? trim( $_POST['email'] ) : null;
-$comment_author_url   = ( isset( $_POST['url'] ) && is_string( $_POST['url'] ) ) ? trim( $_POST['url'] ) : null;
-$comment_content      = ( isset( $_POST['comment'] ) && is_string( $_POST['comment'] ) ) ? trim( $_POST['comment'] ) : null;
-
-// If the user is logged in
</del><span class="cx" style="display: block; padding: 0 10px"> $user = wp_get_current_user();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-if ( $user->exists() ) {
-       if ( empty( $user->display_name ) )
-               $user->display_name=$user->user_login;
-       $comment_author       = wp_slash( $user->display_name );
-       $comment_author_email = wp_slash( $user->user_email );
-       $comment_author_url   = wp_slash( $user->user_url );
-       if ( current_user_can( 'unfiltered_html' ) ) {
-               if ( ! isset( $_POST['_wp_unfiltered_html_comment'] )
-                       || ! wp_verify_nonce( $_POST['_wp_unfiltered_html_comment'], 'unfiltered-html-comment_' . $comment_post_ID )
-               ) {
-                       kses_remove_filters(); // start with a clean slate
-                       kses_init_filters(); // set up the filters
-               }
-       }
-} else {
-       if ( get_option( 'comment_registration' ) || 'private' == $status ) {
-               wp_die( __( 'Sorry, you must be logged in to post a comment.' ), 403 );
-       }
-}
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-$comment_type = '';
-
-if ( get_option('require_name_email') && !$user->exists() ) {
-       if ( 6 > strlen( $comment_author_email ) || '' == $comment_author ) {
-               wp_die( __( '<strong>ERROR</strong>: please fill the required fields (name, email).' ), 200 );
-       } elseif ( ! is_email( $comment_author_email ) ) {
-               wp_die( __( '<strong>ERROR</strong>: please enter a valid email address.' ), 200 );
-       }
-}
-
-if ( '' == $comment_content ) {
-       wp_die( __( '<strong>ERROR</strong>: please type a comment.' ), 200 );
-}
-
-$comment_parent = isset($_POST['comment_parent']) ? absint($_POST['comment_parent']) : 0;
-
-$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type', 'comment_parent', 'user_ID');
-
-$comment_id = wp_new_comment( $commentdata );
-if ( ! $comment_id ) {
-       wp_die( __( "<strong>ERROR</strong>: The comment could not be saved. Please try again later." ) );
-}
-
-$comment = get_comment( $comment_id );
-
</del><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Perform other actions when comment cookies are set.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -151,7 +39,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> do_action( 'set_comment_cookies', $comment, $user );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-$location = empty($_POST['redirect_to']) ? get_comment_link( $comment ) : $_POST['redirect_to'] . '#comment-' . $comment_id;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+$location = empty( $_POST['redirect_to'] ) ? get_comment_link( $comment ) : $_POST['redirect_to'] . '#comment-' . $comment->comment_ID;
</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">  * Filter the location URI to send the commenter after posting.
</span></span></pre></div>
<a id="trunksrcwpincludescommentfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/comment-functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/comment-functions.php       2015-10-03 14:08:43 UTC (rev 34798)
+++ trunk/src/wp-includes/comment-functions.php 2015-10-03 14:46:09 UTC (rev 34799)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2526,3 +2526,195 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return $open;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.
+ *
+ * This function expects unslashed data, as opposed to functions such as `wp_new_comment()` which
+ * expect slashed data.
+ *
+ * @since 4.4.0
+ *
+ * @param array $comment_data {
+ *     Comment data.
+ *
+ *     @type string|int $comment_post_ID             The ID of the post that relates to the comment.
+ *     @type string     $author                      The name of the comment author.
+ *     @type string     $email                       The comment author email address.
+ *     @type string     $url                         The comment author URL.
+ *     @type string     $comment                     The content of the comment.
+ *     @type string|int $comment_parent              The ID of this comment's parent, if any. Default 0.
+ *     @type string     $_wp_unfiltered_html_comment The nonce value for allowing unfiltered HTML.
+ * }
+ * @return WP_Comment|WP_Error A WP_Comment object on success, a WP_Error object on failure.
+ */
+function wp_handle_comment_submission( $comment_data ) {
+
+       $comment_post_ID = $comment_parent = 0;
+       $comment_author = $comment_author_email = $comment_author_url = $comment_content = $_wp_unfiltered_html_comment = null;
+
+       if ( isset( $comment_data['comment_post_ID'] ) ) {
+               $comment_post_ID = (int) $comment_data['comment_post_ID'];
+       }
+       if ( isset( $comment_data['author'] ) && is_string( $comment_data['author'] ) ) {
+               $comment_author = trim( strip_tags( $comment_data['author'] ) );
+       }
+       if ( isset( $comment_data['email'] ) && is_string( $comment_data['email'] ) ) {
+               $comment_author_email = trim( $comment_data['email'] );
+       }
+       if ( isset( $comment_data['url'] ) && is_string( $comment_data['url'] ) ) {
+               $comment_author_url = trim( $comment_data['url'] );
+       }
+       if ( isset( $comment_data['comment'] ) && is_string( $comment_data['comment'] ) ) {
+               $comment_content = trim( $comment_data['comment'] );
+       }
+       if ( isset( $comment_data['comment_parent'] ) ) {
+               $comment_parent = absint( $comment_data['comment_parent'] );
+       }
+       if ( isset( $comment_data['_wp_unfiltered_html_comment'] ) && is_string( $comment_data['_wp_unfiltered_html_comment'] ) ) {
+               $_wp_unfiltered_html_comment = trim( $comment_data['_wp_unfiltered_html_comment'] );
+       }
+
+       $post = get_post( $comment_post_ID );
+
+       if ( empty( $post->comment_status ) ) {
+
+               /**
+                * Fires when a comment is attempted on a post that does not exist.
+                *
+                * @since 1.5.0
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'comment_id_not_found', $comment_post_ID );
+
+               return new WP_Error( 'comment_id_not_found' );
+
+       }
+
+       // get_post_status() will get the parent status for attachments.
+       $status = get_post_status( $post );
+
+       $status_obj = get_post_status_object( $status );
+
+       if ( ! comments_open( $comment_post_ID ) ) {
+
+               /**
+                * Fires when a comment is attempted on a post that has comments closed.
+                *
+                * @since 1.5.0
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'comment_closed', $comment_post_ID );
+
+               return new WP_Error( 'comment_closed', __( 'Sorry, comments are closed for this item.' ), 403 );
+
+       } elseif ( 'trash' == $status ) {
+
+               /**
+                * Fires when a comment is attempted on a trashed post.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'comment_on_trash', $comment_post_ID );
+
+               return new WP_Error( 'comment_on_trash' );
+
+       } elseif ( ! $status_obj->public && ! $status_obj->private ) {
+
+               /**
+                * Fires when a comment is attempted on a post in draft mode.
+                *
+                * @since 1.5.1
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'comment_on_draft', $comment_post_ID );
+
+               return new WP_Error( 'comment_on_draft' );
+
+       } elseif ( post_password_required( $comment_post_ID ) ) {
+
+               /**
+                * Fires when a comment is attempted on a password-protected post.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'comment_on_password_protected', $comment_post_ID );
+
+               return new WP_Error( 'comment_on_password_protected' );
+
+       } else {
+
+               /**
+                * Fires before a comment is posted.
+                *
+                * @since 2.8.0
+                *
+                * @param int $comment_post_ID Post ID.
+                */
+               do_action( 'pre_comment_on_post', $comment_post_ID );
+
+       }
+
+       // If the user is logged in
+       $user = wp_get_current_user();
+       if ( $user->exists() ) {
+               if ( empty( $user->display_name ) ) {
+                       $user->display_name=$user->user_login;
+               }
+               $comment_author       = $user->display_name;
+               $comment_author_email = $user->user_email;
+               $comment_author_url   = $user->user_url;
+               if ( current_user_can( 'unfiltered_html' ) ) {
+                       if ( ! isset( $comment_data['_wp_unfiltered_html_comment'] )
+                               || ! wp_verify_nonce( $comment_data['_wp_unfiltered_html_comment'], 'unfiltered-html-comment_' . $comment_post_ID )
+                       ) {
+                               kses_remove_filters(); // start with a clean slate
+                               kses_init_filters(); // set up the filters
+                       }
+               }
+       } else {
+               if ( get_option( 'comment_registration' ) || 'private' == $status ) {
+                       return new WP_Error( 'not_logged_in', __( 'Sorry, you must be logged in to post a comment.' ), 403 );
+               }
+       }
+
+       $comment_type = '';
+
+       if ( get_option( 'require_name_email' ) && ! $user->exists() ) {
+               if ( 6 > strlen( $comment_author_email ) || '' == $comment_author ) {
+                       return new WP_Error( 'require_name_email', __( '<strong>ERROR</strong>: please fill the required fields (name, email).' ), 200 );
+               } elseif ( ! is_email( $comment_author_email ) ) {
+                       return new WP_Error( 'require_valid_email', __( '<strong>ERROR</strong>: please enter a valid email address.' ), 200 );
+               }
+       }
+
+       if ( '' == $comment_content ) {
+               return new WP_Error( 'require_valid_comment', __( '<strong>ERROR</strong>: please type a comment.' ), 200 );
+       }
+
+       $commentdata = compact(
+               'comment_post_ID',
+               'comment_author',
+               'comment_author_email',
+               'comment_author_url',
+               'comment_content',
+               'comment_type',
+               'comment_parent',
+               'user_ID'
+       );
+
+       $comment_id = wp_new_comment( wp_slash( $commentdata ) );
+       if ( ! $comment_id ) {
+               return new WP_Error( 'comment_save_error', __( '<strong>ERROR</strong>: The comment could not be saved. Please try again later.' ), 500 );
+       }
+
+       return get_comment( $comment_id );
+
+}
</ins></span></pre>
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