__( 'Title' ), 'post_content' => __( 'Content' ), 'post_excerpt' => __( 'Excerpt' ), ); // Runs only once $fields = apply_filters( '_wp_post_revision_fields', $fields ); // WP uses these internally either in versioning or elsewhere - they cannot be versioned foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect ) unset( $fields[$protect] ); } if ( !is_array($post) ) return $fields; $return = array(); foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field ) $return[$field] = $post[$field]; $return['post_parent'] = $post['ID']; $return['post_status'] = 'inherit'; $return['post_type'] = 'revision'; $return['post_name'] = $autosave ? "$post[ID]-autosave-v1" : "$post[ID]-revision-v1"; // "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 $return; } /** * Saves an already existing post as a post revision. * * Typically used immediately after post updates. * Adds a copy of the current post as a revision, so latest revision always matches current post * * @since 2.6.0 * * @uses _wp_put_post_revision() * * @param int $post_id The ID of the post to save as a revision. * @return mixed Null or 0 if error, new revision ID, if success. */ function wp_save_post_revision( $post_id ) { if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return; if ( ! $post = get_post( $post_id ) ) return; if ( ! post_type_supports( $post->post_type, 'revisions' ) ) return; if ( 'auto-draft' == $post->post_status ) return; if ( ! wp_revisions_enabled( $post ) ) return; // Compare the proposed update with the last stored revision verifying that // they are different, unless a plugin tells us to always save regardless. // If no previous revisions, save one if ( $revisions = wp_get_post_revisions( $post_id ) ) { // grab the last revision, but not an autosave foreach ( $revisions as $revision ) { if ( false !== strpos( $revision->post_name, "{$revision->post_parent}-revision" ) ) { $last_revision = $revision; break; } } if ( isset( $last_revision ) && apply_filters( 'wp_save_post_revision_check_for_changes', true, $last_revision, $post ) ) { $post_has_changed = false; foreach ( array_keys( _wp_post_revision_fields() ) as $field ) { if ( normalize_whitespace( $post->$field ) != normalize_whitespace( $last_revision->$field ) ) { $post_has_changed = true; break; } } //don't save revision if post unchanged if( ! $post_has_changed ) return; } } $return = _wp_put_post_revision( $post ); $revisions_to_keep = wp_revisions_to_keep( $post ); if ( $revisions_to_keep < 0 ) return $return; // all revisions and autosaves $revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) ); $delete = count($revisions) - $revisions_to_keep; if ( $delete < 1 ) return $return; $revisions = array_slice( $revisions, 0, $delete ); for ( $i = 0; isset( $revisions[$i] ); $i++ ) { if ( false !== strpos( $revisions[ $i ]->post_name, 'autosave' ) ) continue; wp_delete_post_revision( $revisions[ $i ]->ID ); } return $return; } /** * Retrieve the autosaved data of the specified post. * * Returns a post object containing the information that was autosaved for the * specified post. If the optional $user_id is passed, returns the autosave for that user * otherwise returns the latest autosave. * * @since 2.6.0 * * @uses wp_get_post_revisions() * * @param int $post_id The post ID. * @param int $user_id optional The post author ID. * @return object|bool The autosaved data or false on failure or when no autosave exists. */ function wp_get_post_autosave( $post_id, $user_id = 0 ) { $revisions = wp_get_post_revisions($post_id); foreach ( $revisions as $revision ) { if ( false !== strpos( $revision->post_name, "{$post_id}-autosave" ) ) { if ( $user_id && $user_id != $revision->post_author ) continue; return $revision; break; } } return false; } /** * Determines if the specified post is a revision. * * @since 2.6.0 * * @param int|object $post Post ID or post object. * @return bool|int False if not a revision, ID of revision's parent otherwise. */ function wp_is_post_revision( $post ) { if ( !$post = wp_get_post_revision( $post ) ) return false; return (int) $post->post_parent; } /** * Determines if the specified post is an autosave. * * @since 2.6.0 * * @param int|object $post Post ID or post object. * @return bool|int False if not a revision, ID of autosave's parent otherwise */ function wp_is_post_autosave( $post ) { if ( !$post = wp_get_post_revision( $post ) ) return false; if ( false !== strpos( $post->post_name, "{$post->post_parent}-autosave" ) ) return (int) $post->post_parent; return false; } /** * Inserts post data into the posts table as a post revision. * * @since 2.6.0 * @access private * * @uses wp_insert_post() * * @param int|object|array $post Post ID, post object OR post array. * @param bool $autosave Optional. Is the revision an autosave? * @return mixed Null or 0 if error, new revision ID if success. */ function _wp_put_post_revision( $post = null, $autosave = false ) { if ( is_object($post) ) $post = get_object_vars( $post ); elseif ( !is_array($post) ) $post = get_post($post, ARRAY_A); if ( !$post || empty($post['ID']) ) return; if ( isset($post['post_type']) && 'revision' == $post['post_type'] ) return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) ); $post_id = $post['ID']; $post = _wp_post_revision_fields( $post, $autosave ); $post = wp_slash($post); //since data is from db $revision_id = wp_insert_post( $post ); if ( is_wp_error($revision_id) ) return $revision_id; if ( $revision_id ) do_action( '_wp_put_post_revision', $revision_id ); return $revision_id; } /** * Gets a post revision. * * @since 2.6.0 * * @uses get_post() * * @param int|object $post The post ID or object. * @param string $output Optional. OBJECT, ARRAY_A, or ARRAY_N. * @param string $filter Optional sanitation filter. @see sanitize_post(). * @return mixed Null if error or post object if success. */ function wp_get_post_revision(&$post, $output = OBJECT, $filter = 'raw') { $null = null; if ( !$revision = get_post( $post, OBJECT, $filter ) ) return $revision; if ( 'revision' !== $revision->post_type ) return $null; if ( $output == OBJECT ) { return $revision; } elseif ( $output == ARRAY_A ) { $_revision = get_object_vars($revision); return $_revision; } elseif ( $output == ARRAY_N ) { $_revision = array_values(get_object_vars($revision)); return $_revision; } return $revision; } /** * Restores a post to the specified revision. * * Can restore a past revision using all fields of the post revision, or only selected fields. * * @since 2.6.0 * * @uses wp_get_post_revision() * @uses wp_update_post() * @uses do_action() Calls 'wp_restore_post_revision' on post ID and revision ID if wp_update_post() * is successful. * * @param int|object $revision_id Revision ID or revision object. * @param array $fields Optional. What fields to restore from. Defaults to all. * @return mixed Null if error, false if no fields to restore, (int) post ID if success. */ function wp_restore_post_revision( $revision_id, $fields = null ) { if ( !$revision = wp_get_post_revision( $revision_id, ARRAY_A ) ) return $revision; if ( !is_array( $fields ) ) $fields = array_keys( _wp_post_revision_fields() ); $update = array(); foreach( array_intersect( array_keys( $revision ), $fields ) as $field ) { $update[$field] = $revision[$field]; } if ( !$update ) return false; $update['ID'] = $revision['post_parent']; $update = wp_slash( $update ); //since data is from db $post_id = wp_update_post( $update ); if ( ! $post_id || is_wp_error( $post_id ) ) return $post_id; // Add restore from details $restore_details = array( 'restored_revision_id' => $revision_id, 'restored_by_user' => get_current_user_id(), 'restored_time' => time() ); update_post_meta( $post_id, '_post_restored_from', $restore_details ); // Update last edit user update_post_meta( $post_id, '_edit_last', get_current_user_id() ); do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] ); return $post_id; } /** * Deletes a revision. * * Deletes the row from the posts table corresponding to the specified revision. * * @since 2.6.0 * * @uses wp_get_post_revision() * @uses wp_delete_post() * * @param int|object $revision_id Revision ID or revision object. * @return mixed Null or WP_Error if error, deleted post if success. */ function wp_delete_post_revision( $revision_id ) { if ( !$revision = wp_get_post_revision( $revision_id ) ) return $revision; $delete = wp_delete_post( $revision->ID ); if ( is_wp_error( $delete ) ) return $delete; if ( $delete ) do_action( 'wp_delete_post_revision', $revision->ID, $revision ); return $delete; } /** * Returns all revisions of specified post. * * @since 2.6.0 * * @uses get_children() * * @param int|object $post_id Post ID or post object * @return array An array of revisions, or an empty array if none. */ function wp_get_post_revisions( $post_id = 0, $args = null ) { $post = get_post( $post_id ); if ( ! $post || empty( $post->ID ) || ! wp_revisions_enabled( $post ) ) return array(); $defaults = array( 'order' => 'DESC', 'orderby' => 'date' ); $args = wp_parse_args( $args, $defaults ); $args = array_merge( $args, array( 'post_parent' => $post->ID, 'post_type' => 'revision', 'post_status' => 'inherit' ) ); if ( ! $revisions = get_children( $args ) ) return array(); return $revisions; } /** * Determine if revisions are enabled for a given post. * * @since 3.6.0 * * @uses wp_revisions_to_keep() * * @param object $post The post object. * @return bool True if number of revisions to keep isn't zero, false otherwise. */ function wp_revisions_enabled( $post ) { return wp_revisions_to_keep( $post ) != 0; } /** * Determine how many revisions to retain for a given post. * By default, an infinite number of revisions are stored if a post type supports revisions. * * @since 3.6.0 * * @uses post_type_supports() * @uses apply_filters() Calls 'wp_revisions_to_keep' hook on the number of revisions. * * @param object $post The post object. * @return int The number of revisions to keep. */ function wp_revisions_to_keep( $post ) { $num = WP_POST_REVISIONS; if ( true === $num ) $num = -1; else $num = intval( $num ); if ( ! post_type_supports( $post->post_type, 'revisions' ) ) $num = 0; return (int) apply_filters( 'wp_revisions_to_keep', $num, $post ); } /** * Sets up the post object for preview based on the post autosave. * * @since 2.7.0 * @access private */ function _set_preview($post) { if ( ! is_object($post) ) return $post; $preview = wp_get_post_autosave($post->ID); if ( ! is_object($preview) ) return $post; $preview = sanitize_post($preview); $post->post_content = $preview->post_content; $post->post_title = $preview->post_title; $post->post_excerpt = $preview->post_excerpt; add_filter( 'get_the_terms', '_wp_preview_terms_filter', 10, 3 ); return $post; } /** * Filters the latest content for preview from the post autosave. * * @since 2.7.0 * @access private */ function _show_post_preview() { if ( isset($_GET['preview_id']) && isset($_GET['preview_nonce']) ) { $id = (int) $_GET['preview_id']; if ( false == wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) ) wp_die( __('You do not have permission to preview drafts.') ); add_filter('the_preview', '_set_preview'); } } /** * Filters terms lookup to set the post format. * * @since 3.6.0 * @access private */ function _wp_preview_terms_filter( $terms, $post_id, $taxonomy ) { if ( ! $post = get_post() ) return $terms; if ( empty( $_REQUEST['post_format'] ) || $post->ID != $post_id || 'post_format' != $taxonomy || 'revision' == $post->post_type ) return $terms; if ( 'standard' == $_REQUEST['post_format'] ) $terms = array(); elseif ( $term = get_term_by( 'slug', 'post-format-' . sanitize_key( $_REQUEST['post_format'] ), 'post_format' ) ) $terms = array( $term ); // Can only have one post format return $terms; } /** * Gets the post revision version. * * @since 3.6.0 * @access private */ function _wp_get_post_revision_version( $revision ) { if ( is_object( $revision ) ) $revision = get_object_vars( $revision ); elseif ( !is_array( $revision ) ) return false; if ( preg_match( '/^\d+-(?:autosave|revision)-v(\d+)$/', $revision['post_name'], $matches ) ) return (int) $matches[1]; return 0; } /** * Upgrade the revisions author, add the current post as a revision and set the revisions version to 1 * * @since 3.6.0 * @access private * * @uses wp_get_post_revisions() * * @param object $post Post object * @param array $revisions Current revisions of the post * @return bool true if the revisions were upgraded, false if problems */ function _wp_upgrade_revisions_of_post( $post, $revisions ) { global $wpdb; // Add post option exclusively $lock = "revision-upgrade-{$post->ID}"; $now = time(); $result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, 'no') /* LOCK */", $lock, $now ) ); if ( ! $result ) { // If we couldn't get a lock, see how old the previous lock is $locked = get_option( $lock ); if ( ! $locked ) { // Can't write to the lock, and can't read the lock. // Something broken has happened return false; } if ( $locked > $now - 3600 ) { // Lock is not too old: some other process may be upgrading this post. Bail. return false; } // Lock is too old - update it (below) and continue } // If we could get a lock, re-"add" the option to fire all the correct filters. update_option( $lock, $now ); reset( $revisions ); $add_last = true; 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. // No need to add a copy of the post as latest revision. if ( 0 < $this_revision_version ) { $add_last = false; continue; } // Always update the revision version $update = array( 'post_name' => preg_replace( '/^(\d+-(?:autosave|revision))[\d-]*$/', '$1-v1', $this_revision->post_name ), ); // If this revision is the oldest revision of the post, i.e. no $prev_revision, // the correct post_author is probably $post->post_author, but that's only a good guess. // Update the revision version only and Leave the author as-is. if ( $prev_revision ) { $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 ( $prev_revision_version < 1 ) $update['post_author'] = $prev_revision->post_author; } // Upgrade this revision $result = $wpdb->update( $wpdb->posts, $update, array( 'ID' => $this_revision->ID ) ); if ( $result ) wp_cache_delete( $this_revision->ID, 'posts' ); } while ( $prev_revision ); delete_option( $lock ); // Add a copy of the post as latest revision. if ( $add_last ) wp_save_post_revision( $post->ID ); return true; } /** * Displays a human readable HTML representation of the difference between two strings. * similar to wp_text_diff, but tracks and returns could of lines added and removed * * @since 3.6.0 * * @see wp_parse_args() Used to change defaults to user defined settings. * @uses Text_Diff * @uses WP_Text_Diff_Renderer_Table * * @param string $left_string "old" (left) version of string * @param string $right_string "new" (right) version of string * @param string|array $args Optional. Change 'title', 'title_left', and 'title_right' defaults. * @return array contains html, linesadded & linesdeletd, empty string if strings are equivalent. */ function wp_text_diff_with_count( $left_string, $right_string, $args = null ) { $defaults = array( 'title' => '', 'title_left' => '', 'title_right' => '' ); $args = wp_parse_args( $args, $defaults ); if ( ! class_exists( 'WP_Text_Diff_Renderer_Table' ) ) require( ABSPATH . WPINC . '/wp-diff.php' ); $left_string = normalize_whitespace( $left_string ); $right_string = normalize_whitespace( $right_string ); $left_lines = explode( "\n", $left_string ); $right_lines = explode( "\n", $right_string) ; $text_diff = new Text_Diff($left_lines, $right_lines ); $lines_added = $text_diff->countAddedLines(); $lines_deleted = $text_diff->countDeletedLines(); $renderer = new WP_Text_Diff_Renderer_Table(); $diff = $renderer->render( $text_diff ); if ( !$diff ) return ''; $r = "\n"; if ( ! empty( $args[ 'show_split_view' ] ) ) { $r .= ""; } else { $r .= ""; } if ( $args['title'] || $args['title_left'] || $args['title_right'] ) $r .= ""; if ( $args['title'] ) $r .= "\n"; if ( $args['title_left'] || $args['title_right'] ) { $r .= "\n"; $r .= "\t\n"; $r .= "\t\n"; $r .= "\n"; } if ( $args['title'] || $args['title_left'] || $args['title_right'] ) $r .= "\n"; $r .= "\n$diff\n\n"; $r .= "
$args[title]
$args[title_left]$args[title_right]
"; return array( 'html' => $r, 'lines_added' => $lines_added, 'lines_deleted' => $lines_deleted ); }