Ticket #16215: 16215.4.diff

wp-admin/includes/post.php

@@ -241 +241 @@
 
         add_meta( $post_ID );
 
-        update_post_meta( $post_ID, '_edit_last', $GLOBALS['current_user']->ID );
-
         wp_update_post( $post_data );
 
         // Now that we have an ID we can fix any attachment anchor hrefs
@@ -568 +566 @@
 
         add_meta( $post_ID );
 
-        add_post_meta( $post_ID, '_edit_last', $GLOBALS['current_user']->ID );
-
         // Now that we have an ID we can fix any attachment anchor hrefs
         _fix_attachment_links( $post_ID );
 

wp-includes/author-template.php

@@ -61 +61 @@
 /**
  * Retrieve the author who last edited the current post.
  *
+ * As of WordPress 3.6, returns the display name of the user who created the revision if called on a revision object.
+ *
  * @since 2.8
- * @uses $post The current post's DB object.
  * @uses get_post_meta() Retrieves the ID of the author who last edited the current post.
  * @uses get_userdata() Retrieves the author's DB object.
  * @uses apply_filters() Calls 'the_modified_author' hook on the author display name.
+ *
+ * @param mixed $post_id Post ID, WP_Post, or falsey to use the current post.
  * @return string The author's display name.
  */
-function get_the_modified_author() {
-        if ( $last_id = get_post_meta( get_post()->ID, '_edit_last', true) ) {
-                $last_user = get_userdata($last_id);
-                return apply_filters('the_modified_author', $last_user->display_name);
+function get_the_modified_author( $post_id = 0 ) {
+        $post = get_post( $post_id );
+        if ( ! $post )
+                return;
+
+        $unknown = false;
+
+        if ( 'revision' === $post->post_type ) {
+                // _wp_get_post_revision_version() can return false
+                $revision_version = _wp_get_post_revision_version( $post );
+                if ( false === $revision_version ) {
+                        // False means something horrible happened.  Just return something.
+                        $modified_author_id = $post->post_author;
+                } elseif ( 0 === $revision_version ) {
+                        // Set as fallback
+                        $modified_author_id = $post->post_author;
+
+                        $revisions = wp_get_post_revisions( $post->post_parent );
+                        reset( $revisions );
+                        do {
+                                $this_revision = current( $revisions );
+                                $prev_revision = next( $revisions ); // Ordered DESC
+
+                                if ( $post->ID == $this_revision->ID && $prev_revision ) {
+                                        $prev_revision_version = _wp_get_post_revision_version( $prev_revision );
+                                        if ( 0 === $prev_revision_version ) {
+                                                $modified_author_id = $prev_revision->post_author;
+                                        } else {
+                                                $unknown = true;
+                                        }
+                                        break;
+                                }
+                        } while ( $prev_revision );
+                } else {
+                        // Everything is up to date
+                        $modified_author_id = $post->post_author;
+                }
+        } else {
+                $modified_author_id = get_post_meta( $post->ID, '_edit_last', true );
         }
+
+        if ( ! $modified_author_id )
+                return;
+
+        $modified_author = get_userdata( $modified_author_id );
+
+        $display_name = $modified_author->display_name;
+        if ( $unknown ) {
+                $display_name = sprintf( _x( '%1$s?', 'Unknown revision author name: %1$s = display_name of best guess at author' ), $display_name );
+        }
+
+        return apply_filters( 'the_modified_author', $display_name );
 }
 
 /**

wp-includes/post-template.php

@@ -1386 +1386 @@
                         continue;
 
                 $date = wp_post_revision_title( $revision );
-                $name = get_the_author_meta( 'display_name', $revision->post_author );
+                $name = get_the_modified_author( $revision );
 
                 if ( 'form-table' == $format ) {
                         if ( $left )

wp-includes/post.php

@@ -2900 +2900 @@
                 $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
         }
 
+        if ( 'revision' !== $post_type )
+                update_post_meta( $post_ID, '_edit_last', $user_ID );
+
         if ( is_object_in_taxonomy($post_type, 'category') )
                 wp_set_post_categories( $post_ID, $post_category );
 
@@ -4916 +4919 @@
         $return['post_parent']   = $post['ID'];
         $return['post_status']   = 'inherit';
         $return['post_type']     = 'revision';
-        $return['post_name']     = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
+        $return['post_name']     = $autosave ? "$post[ID]-1-autosave" : "$post[ID]-1-revision"; // "1" is the revisioning system version
         $return['post_date']     = isset($post['post_modified']) ? $post['post_modified'] : '';
         $return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
 
+        $return['post_author']   = get_post_meta( $post['ID'], '_edit_last', true );
+
         return $return;
 }
 
@@ -5238 +5243 @@
         return $revisions;
 }
 
+function _wp_get_post_revision_version( $post ) {
+        if ( is_array( $post ) ) {
+                if ( ! isset( $post['post_name'] ) ) {
+                        return false;
+                }
+
+                $name = $post['post_name'];
+        } elseif ( is_object( $post ) ) {
+                if ( ! isset( $post->post_name ) ) {
+                        return false;
+                }
+
+                $name = $post->post_name;
+        } else {
+                return false;
+        }
+
+        if ( ! preg_match( '/^([\d-]+)(?:autosave|revision)(?:-\d+)*$/', $name, $matches ) ) {
+                return false;
+        } 
+
+        $parts = explode( '-', trim( $matches[1], '-' ) );
+
+        if ( 2 !== count( $parts ) ) {
+                return 0;
+        }
+
+        return (int) $parts[1];
+}
+
+function _wp_upgrade_revisions_of_post( $post ) {
+        global $wpdb;
+
+        $post = get_post( $post );
+        if ( ! $post )
+                return false;
+
+        if ( ! post_type_supports( $post->post_type, 'revisions' ) )
+                return false;
+
+        $revisions = wp_get_post_revisions( $post->ID ); // array( 'order' => 'DESC', 'orderby' => 'date' ); // Always work from most recent to oldest.
+
+        if ( ! $revisions )
+                return true;
+
+        // Add post option exclusively
+        $lock      = "revision-upgrade-{$post->ID}";
+        $locked_at = time();
+        $result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, 'no') /* LOCK */", $lock, $locked_at ) );
+        if ( ! $result ) {
+                // If we couldn't get a lock, see how old the previous lock is
+                $locked_at = get_option( $lock );
+                if ( !$locked_at ) {
+                        // Can't write to the lock, and can't read the lock.
+                        // Something broken has happened
+                        return false;
+                }
+
+                if ( $lock_at < time() - 3600 ) {
+                        // Lock is too old - try again
+                        delete_option( $lock );
+                        return wp_upgrade_revisions_of_post( $post );
+                }
+
+                // Lock is not too old: some other process may be upgrading this post.  Bail.
+                return;
+        } else {
+                // If we could get a lock, re-"add" the option to fire all the correct filters.
+                add_option( $lock, $locked_at );
+        }
+
+        $success = true;
+
+        reset( $revisions );
+        do {
+                $this_revision = current( $revisions );
+                $prev_revision = next( $revisions );
+
+                $this_revision_version = _wp_get_post_revision_version( $this_revision );
+
+                // Something terrible happened
+                if ( false === $this_revision_version )
+                        continue;
+
+                // 1 is the latest revision version, so we're already up to date
+                if ( 0 < $this_revision_version )
+                        continue;
+
+                // This revision is the oldest revision of the post.
+                // The correct post_author is probably $post->post_author, but that's only a good guess.
+                // Leave un-upgraded.  Will be caught by get_modified_post_author() on display.
+                if ( ! $prev_revision ) {
+                        continue;
+                }
+
+                $prev_revision_version = _wp_get_post_revision_version( $prev_revision );
+
+                // If the previous revision is already up to date, it no longer has the information we need :(
+                if ( 0 < $prev_revision_version ) {
+                        continue;
+                }
+
+                // Upgrade this revision
+
+                // Cast as object so that wp_update_post() handles slashing for us
+                $update = (object) array(
+                        'ID'          => $this_revision->ID,
+                        'post_name'   => preg_replace( '/^(\d+)(?:-0)?-/', '\\1-1-', $this_revision->post_name ),
+                        'post_author' => $prev_revision->post_author,
+                );
+
+                $result = wp_update_post( $update );
+                if ( ! $result || is_wp_error( $result ) ) {
+                        // Wilhelm!
+                        $success = false;
+                        break;
+                }
+        } while ( $prev_revision );
+
+        delete_option( $lock );
+        return true;
+}
+
 function _set_preview($post) {
 
         if ( ! is_object($post) )