1134 lines
30 KiB
PHP
1134 lines
30 KiB
PHP
<?php
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/**
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* Post revision functions.
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*
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* @package WordPress
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* @subpackage Post_Revisions
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*/
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/**
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* Determines which fields of posts are to be saved in revisions.
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*
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* @since 2.6.0
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* @since 4.5.0 A `WP_Post` object can now be passed to the `$post` parameter.
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* @since 4.5.0 The optional `$autosave` parameter was deprecated and renamed to `$deprecated`.
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* @access private
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*
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* @param array|WP_Post $post Optional. A post array or a WP_Post object being processed
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* for insertion as a post revision. Default empty array.
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* @param bool $deprecated Not used.
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* @return string[] Array of fields that can be versioned.
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*/
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function _wp_post_revision_fields( $post = array(), $deprecated = false ) {
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static $fields = null;
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if ( ! is_array( $post ) ) {
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$post = get_post( $post, ARRAY_A );
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}
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if ( is_null( $fields ) ) {
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// Allow these to be versioned.
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$fields = array(
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'post_title' => __( 'Title' ),
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'post_content' => __( 'Content' ),
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'post_excerpt' => __( 'Excerpt' ),
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);
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}
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/**
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* Filters the list of fields saved in post revisions.
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*
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* Included by default: 'post_title', 'post_content' and 'post_excerpt'.
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*
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* Disallowed fields: 'ID', 'post_name', 'post_parent', 'post_date',
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* 'post_date_gmt', 'post_status', 'post_type', 'comment_count',
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* and 'post_author'.
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*
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* @since 2.6.0
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* @since 4.5.0 The `$post` parameter was added.
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*
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* @param string[] $fields List of fields to revision. Contains 'post_title',
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* 'post_content', and 'post_excerpt' by default.
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* @param array $post A post array being processed for insertion as a post revision.
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*/
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$fields = apply_filters( '_wp_post_revision_fields', $fields, $post );
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// WP uses these internally either in versioning or elsewhere - they cannot be versioned.
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foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect ) {
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unset( $fields[ $protect ] );
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}
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return $fields;
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}
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/**
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* Returns a post array ready to be inserted into the posts table as a post revision.
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*
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* @since 4.5.0
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* @access private
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*
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* @param array|WP_Post $post Optional. A post array or a WP_Post object to be processed
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* for insertion as a post revision. Default empty array.
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* @param bool $autosave Optional. Is the revision an autosave? Default false.
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* @return array Post array ready to be inserted as a post revision.
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*/
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function _wp_post_revision_data( $post = array(), $autosave = false ) {
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if ( ! is_array( $post ) ) {
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$post = get_post( $post, ARRAY_A );
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}
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$fields = _wp_post_revision_fields( $post );
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$revision_data = array();
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foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field ) {
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$revision_data[ $field ] = $post[ $field ];
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}
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$revision_data['post_parent'] = $post['ID'];
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$revision_data['post_status'] = 'inherit';
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$revision_data['post_type'] = 'revision';
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$revision_data['post_name'] = $autosave ? "$post[ID]-autosave-v1" : "$post[ID]-revision-v1"; // "1" is the revisioning system version.
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$revision_data['post_date'] = isset( $post['post_modified'] ) ? $post['post_modified'] : '';
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$revision_data['post_date_gmt'] = isset( $post['post_modified_gmt'] ) ? $post['post_modified_gmt'] : '';
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return $revision_data;
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}
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/**
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* Saves revisions for a post after all changes have been made.
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*
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* @since 6.4.0
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*
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* @param int $post_id The post id that was inserted.
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* @param WP_Post $post The post object that was inserted.
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* @param bool $update Whether this insert is updating an existing post.
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*/
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function wp_save_post_revision_on_insert( $post_id, $post, $update ) {
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if ( ! $update ) {
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return;
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}
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if ( ! has_action( 'post_updated', 'wp_save_post_revision' ) ) {
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return;
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}
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wp_save_post_revision( $post_id );
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}
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/**
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* Creates a revision for the current version of a post.
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*
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* Typically used immediately after a post update, as every update is a revision,
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* and the most recent revision always matches the current post.
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*
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* @since 2.6.0
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*
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* @param int $post_id The ID of the post to save as a revision.
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* @return int|WP_Error|void Void or 0 if error, new revision ID, if success.
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*/
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function wp_save_post_revision( $post_id ) {
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if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
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return;
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}
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// Prevent saving post revisions if revisions should be saved on wp_after_insert_post.
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if ( doing_action( 'post_updated' ) && has_action( 'wp_after_insert_post', 'wp_save_post_revision_on_insert' ) ) {
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return;
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}
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$post = get_post( $post_id );
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if ( ! $post ) {
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return;
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}
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if ( ! post_type_supports( $post->post_type, 'revisions' ) ) {
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return;
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}
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if ( 'auto-draft' === $post->post_status ) {
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return;
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}
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if ( ! wp_revisions_enabled( $post ) ) {
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return;
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}
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/*
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* Compare the proposed update with the last stored revision verifying that
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* they are different, unless a plugin tells us to always save regardless.
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* If no previous revisions, save one.
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*/
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$revisions = wp_get_post_revisions( $post_id );
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if ( $revisions ) {
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// Grab the latest revision, but not an autosave.
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foreach ( $revisions as $revision ) {
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if ( str_contains( $revision->post_name, "{$revision->post_parent}-revision" ) ) {
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$latest_revision = $revision;
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break;
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}
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}
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/**
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* Filters whether the post has changed since the latest revision.
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*
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* By default a revision is saved only if one of the revisioned fields has changed.
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* This filter can override that so a revision is saved even if nothing has changed.
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*
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* @since 3.6.0
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*
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* @param bool $check_for_changes Whether to check for changes before saving a new revision.
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* Default true.
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* @param WP_Post $latest_revision The latest revision post object.
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* @param WP_Post $post The post object.
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*/
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if ( isset( $latest_revision ) && apply_filters( 'wp_save_post_revision_check_for_changes', true, $latest_revision, $post ) ) {
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$post_has_changed = false;
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foreach ( array_keys( _wp_post_revision_fields( $post ) ) as $field ) {
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if ( normalize_whitespace( $post->$field ) !== normalize_whitespace( $latest_revision->$field ) ) {
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$post_has_changed = true;
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break;
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}
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}
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/**
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* Filters whether a post has changed.
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*
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* By default a revision is saved only if one of the revisioned fields has changed.
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* This filter allows for additional checks to determine if there were changes.
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*
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* @since 4.1.0
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*
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* @param bool $post_has_changed Whether the post has changed.
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* @param WP_Post $latest_revision The latest revision post object.
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* @param WP_Post $post The post object.
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*/
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$post_has_changed = (bool) apply_filters( 'wp_save_post_revision_post_has_changed', $post_has_changed, $latest_revision, $post );
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// Don't save revision if post unchanged.
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if ( ! $post_has_changed ) {
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return;
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}
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}
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}
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$return = _wp_put_post_revision( $post );
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/*
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* If a limit for the number of revisions to keep has been set,
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* delete the oldest ones.
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*/
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$revisions_to_keep = wp_revisions_to_keep( $post );
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if ( $revisions_to_keep < 0 ) {
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return $return;
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}
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$revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
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/**
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* Filters the revisions to be considered for deletion.
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*
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* @since 6.2.0
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*
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* @param WP_Post[] $revisions Array of revisions, or an empty array if none.
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* @param int $post_id The ID of the post to save as a revision.
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*/
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$revisions = apply_filters(
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'wp_save_post_revision_revisions_before_deletion',
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$revisions,
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$post_id
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);
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$delete = count( $revisions ) - $revisions_to_keep;
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if ( $delete < 1 ) {
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return $return;
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}
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$revisions = array_slice( $revisions, 0, $delete );
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for ( $i = 0; isset( $revisions[ $i ] ); $i++ ) {
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if ( str_contains( $revisions[ $i ]->post_name, 'autosave' ) ) {
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continue;
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}
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wp_delete_post_revision( $revisions[ $i ]->ID );
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}
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return $return;
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}
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/**
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* Retrieves the autosaved data of the specified post.
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*
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* Returns a post object with the information that was autosaved for the specified post.
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* If the optional $user_id is passed, returns the autosave for that user, otherwise
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* returns the latest autosave.
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*
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* @since 2.6.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param int $post_id The post ID.
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* @param int $user_id Optional. The post author ID. Default 0.
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* @return WP_Post|false The autosaved data or false on failure or when no autosave exists.
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*/
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function wp_get_post_autosave( $post_id, $user_id = 0 ) {
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global $wpdb;
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$autosave_name = $post_id . '-autosave-v1';
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$user_id_query = ( 0 !== $user_id ) ? "AND post_author = $user_id" : null;
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// Construct the autosave query.
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$autosave_query = "
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SELECT *
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FROM $wpdb->posts
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WHERE post_parent = %d
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AND post_type = 'revision'
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AND post_status = 'inherit'
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AND post_name = %s " . $user_id_query . '
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ORDER BY post_date DESC
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LIMIT 1';
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$autosave = $wpdb->get_results(
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$wpdb->prepare(
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$autosave_query,
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$post_id,
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$autosave_name
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)
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);
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if ( ! $autosave ) {
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return false;
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}
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return get_post( $autosave[0] );
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}
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/**
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* Determines if the specified post is a revision.
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*
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* @since 2.6.0
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*
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* @param int|WP_Post $post Post ID or post object.
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* @return int|false ID of revision's parent on success, false if not a revision.
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*/
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function wp_is_post_revision( $post ) {
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$post = wp_get_post_revision( $post );
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if ( ! $post ) {
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return false;
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}
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return (int) $post->post_parent;
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}
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/**
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* Determines if the specified post is an autosave.
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*
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* @since 2.6.0
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*
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* @param int|WP_Post $post Post ID or post object.
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* @return int|false ID of autosave's parent on success, false if not a revision.
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*/
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function wp_is_post_autosave( $post ) {
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$post = wp_get_post_revision( $post );
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if ( ! $post ) {
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return false;
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}
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if ( str_contains( $post->post_name, "{$post->post_parent}-autosave" ) ) {
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return (int) $post->post_parent;
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}
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return false;
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}
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/**
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* Inserts post data into the posts table as a post revision.
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*
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* @since 2.6.0
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* @access private
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*
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* @param int|WP_Post|array|null $post Post ID, post object OR post array.
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* @param bool $autosave Optional. Whether the revision is an autosave or not.
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* Default false.
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* @return int|WP_Error WP_Error or 0 if error, new revision ID if success.
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*/
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function _wp_put_post_revision( $post = null, $autosave = false ) {
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if ( is_object( $post ) ) {
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$post = get_object_vars( $post );
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} elseif ( ! is_array( $post ) ) {
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$post = get_post( $post, ARRAY_A );
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}
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if ( ! $post || empty( $post['ID'] ) ) {
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return new WP_Error( 'invalid_post', __( 'Invalid post ID.' ) );
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}
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if ( isset( $post['post_type'] ) && 'revision' === $post['post_type'] ) {
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return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
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}
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$post = _wp_post_revision_data( $post, $autosave );
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$post = wp_slash( $post ); // Since data is from DB.
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$revision_id = wp_insert_post( $post, true );
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if ( is_wp_error( $revision_id ) ) {
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return $revision_id;
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}
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if ( $revision_id ) {
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/**
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* Fires once a revision has been saved.
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*
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* @since 2.6.0
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* @since 6.4.0 The post_id parameter was added.
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*
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* @param int $revision_id Post revision ID.
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* @param int $post_id Post ID.
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*/
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do_action( '_wp_put_post_revision', $revision_id, $post['post_parent'] );
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}
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return $revision_id;
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}
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/**
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* Save the revisioned meta fields.
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*
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* @since 6.4.0
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*
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* @param int $revision_id The ID of the revision to save the meta to.
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* @param int $post_id The ID of the post the revision is associated with.
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*/
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function wp_save_revisioned_meta_fields( $revision_id, $post_id ) {
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$post_type = get_post_type( $post_id );
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if ( ! $post_type ) {
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return;
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}
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foreach ( wp_post_revision_meta_keys( $post_type ) as $meta_key ) {
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if ( metadata_exists( 'post', $post_id, $meta_key ) ) {
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_wp_copy_post_meta( $post_id, $revision_id, $meta_key );
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}
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}
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}
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/**
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* Gets a post revision.
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*
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* @since 2.6.0
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*
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* @param int|WP_Post $post Post ID or post object.
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* @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
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* correspond to a WP_Post object, an associative array, or a numeric array,
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* respectively. Default OBJECT.
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* @param string $filter Optional sanitization filter. See sanitize_post(). Default 'raw'.
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* @return WP_Post|array|null WP_Post (or array) on success, or null on failure.
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*/
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function wp_get_post_revision( &$post, $output = OBJECT, $filter = 'raw' ) {
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$revision = get_post( $post, OBJECT, $filter );
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if ( ! $revision ) {
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return $revision;
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}
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if ( 'revision' !== $revision->post_type ) {
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return null;
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}
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if ( OBJECT === $output ) {
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return $revision;
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} elseif ( ARRAY_A === $output ) {
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$_revision = get_object_vars( $revision );
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return $_revision;
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} elseif ( ARRAY_N === $output ) {
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$_revision = array_values( get_object_vars( $revision ) );
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return $_revision;
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}
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return $revision;
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}
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|
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/**
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* Restores a post to the specified revision.
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*
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* Can restore a past revision using all fields of the post revision, or only selected fields.
|
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*
|
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* @since 2.6.0
|
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*
|
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* @param int|WP_Post $revision Revision ID or revision object.
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* @param array $fields Optional. What fields to restore from. Defaults to all.
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* @return int|false|null Null if error, false if no fields to restore, (int) post ID if success.
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*/
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function wp_restore_post_revision( $revision, $fields = null ) {
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$revision = wp_get_post_revision( $revision, ARRAY_A );
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if ( ! $revision ) {
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return $revision;
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}
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if ( ! is_array( $fields ) ) {
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$fields = array_keys( _wp_post_revision_fields( $revision ) );
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}
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$update = array();
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foreach ( array_intersect( array_keys( $revision ), $fields ) as $field ) {
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$update[ $field ] = $revision[ $field ];
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}
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if ( ! $update ) {
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return false;
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}
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$update['ID'] = $revision['post_parent'];
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$update = wp_slash( $update ); // Since data is from DB.
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$post_id = wp_update_post( $update );
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if ( ! $post_id || is_wp_error( $post_id ) ) {
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return $post_id;
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}
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// Update last edit user.
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update_post_meta( $post_id, '_edit_last', get_current_user_id() );
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|
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/**
|
|
* Fires after a post revision has been restored.
|
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*
|
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* @since 2.6.0
|
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*
|
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* @param int $post_id Post ID.
|
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* @param int $revision_id Post revision ID.
|
|
*/
|
|
do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
|
|
|
|
return $post_id;
|
|
}
|
|
|
|
/**
|
|
* Restore the revisioned meta values for a post.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param int $post_id The ID of the post to restore the meta to.
|
|
* @param int $revision_id The ID of the revision to restore the meta from.
|
|
*/
|
|
function wp_restore_post_revision_meta( $post_id, $revision_id ) {
|
|
$post_type = get_post_type( $post_id );
|
|
if ( ! $post_type ) {
|
|
return;
|
|
}
|
|
|
|
// Restore revisioned meta fields.
|
|
foreach ( wp_post_revision_meta_keys( $post_type ) as $meta_key ) {
|
|
|
|
// Clear any existing meta.
|
|
delete_post_meta( $post_id, $meta_key );
|
|
|
|
_wp_copy_post_meta( $revision_id, $post_id, $meta_key );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Copy post meta for the given key from one post to another.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param int $source_post_id Post ID to copy meta value(s) from.
|
|
* @param int $target_post_id Post ID to copy meta value(s) to.
|
|
* @param string $meta_key Meta key to copy.
|
|
*/
|
|
function _wp_copy_post_meta( $source_post_id, $target_post_id, $meta_key ) {
|
|
|
|
foreach ( get_post_meta( $source_post_id, $meta_key ) as $meta_value ) {
|
|
/**
|
|
* We use add_metadata() function vs add_post_meta() here
|
|
* to allow for a revision post target OR regular post.
|
|
*/
|
|
add_metadata( 'post', $target_post_id, $meta_key, wp_slash( $meta_value ) );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determine which post meta fields should be revisioned.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param string $post_type The post type being revisioned.
|
|
* @return array An array of meta keys to be revisioned.
|
|
*/
|
|
function wp_post_revision_meta_keys( $post_type ) {
|
|
$registered_meta = array_merge(
|
|
get_registered_meta_keys( 'post' ),
|
|
get_registered_meta_keys( 'post', $post_type )
|
|
);
|
|
|
|
$wp_revisioned_meta_keys = array();
|
|
|
|
foreach ( $registered_meta as $name => $args ) {
|
|
if ( $args['revisions_enabled'] ) {
|
|
$wp_revisioned_meta_keys[ $name ] = true;
|
|
}
|
|
}
|
|
|
|
$wp_revisioned_meta_keys = array_keys( $wp_revisioned_meta_keys );
|
|
|
|
/**
|
|
* Filter the list of post meta keys to be revisioned.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param array $keys An array of meta fields to be revisioned.
|
|
* @param string $post_type The post type being revisioned.
|
|
*/
|
|
return apply_filters( 'wp_post_revision_meta_keys', $wp_revisioned_meta_keys, $post_type );
|
|
}
|
|
|
|
/**
|
|
* Check whether revisioned post meta fields have changed.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param bool $post_has_changed Whether the post has changed.
|
|
* @param WP_Post $last_revision The last revision post object.
|
|
* @param WP_Post $post The post object.
|
|
* @return bool Whether the post has changed.
|
|
*/
|
|
function wp_check_revisioned_meta_fields_have_changed( $post_has_changed, WP_Post $last_revision, WP_Post $post ) {
|
|
foreach ( wp_post_revision_meta_keys( $post->post_type ) as $meta_key ) {
|
|
if ( get_post_meta( $post->ID, $meta_key ) !== get_post_meta( $last_revision->ID, $meta_key ) ) {
|
|
$post_has_changed = true;
|
|
break;
|
|
}
|
|
}
|
|
return $post_has_changed;
|
|
}
|
|
|
|
/**
|
|
* Deletes a revision.
|
|
*
|
|
* Deletes the row from the posts table corresponding to the specified revision.
|
|
*
|
|
* @since 2.6.0
|
|
*
|
|
* @param int|WP_Post $revision Revision ID or revision object.
|
|
* @return WP_Post|false|null Null or false if error, deleted post object if success.
|
|
*/
|
|
function wp_delete_post_revision( $revision ) {
|
|
$revision = wp_get_post_revision( $revision );
|
|
|
|
if ( ! $revision ) {
|
|
return $revision;
|
|
}
|
|
|
|
$delete = wp_delete_post( $revision->ID );
|
|
|
|
if ( $delete ) {
|
|
/**
|
|
* Fires once a post revision has been deleted.
|
|
*
|
|
* @since 2.6.0
|
|
*
|
|
* @param int $revision_id Post revision ID.
|
|
* @param WP_Post $revision Post revision object.
|
|
*/
|
|
do_action( 'wp_delete_post_revision', $revision->ID, $revision );
|
|
}
|
|
|
|
return $delete;
|
|
}
|
|
|
|
/**
|
|
* Returns all revisions of specified post.
|
|
*
|
|
* @since 2.6.0
|
|
*
|
|
* @see get_children()
|
|
*
|
|
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
|
|
* @param array|null $args Optional. Arguments for retrieving post revisions. Default null.
|
|
* @return WP_Post[]|int[] Array of revision objects or IDs, or an empty array if none.
|
|
*/
|
|
function wp_get_post_revisions( $post = 0, $args = null ) {
|
|
$post = get_post( $post );
|
|
|
|
if ( ! $post || empty( $post->ID ) ) {
|
|
return array();
|
|
}
|
|
|
|
$defaults = array(
|
|
'order' => 'DESC',
|
|
'orderby' => 'date ID',
|
|
'check_enabled' => true,
|
|
);
|
|
$args = wp_parse_args( $args, $defaults );
|
|
|
|
if ( $args['check_enabled'] && ! wp_revisions_enabled( $post ) ) {
|
|
return array();
|
|
}
|
|
|
|
$args = array_merge(
|
|
$args,
|
|
array(
|
|
'post_parent' => $post->ID,
|
|
'post_type' => 'revision',
|
|
'post_status' => 'inherit',
|
|
)
|
|
);
|
|
|
|
$revisions = get_children( $args );
|
|
|
|
if ( ! $revisions ) {
|
|
return array();
|
|
}
|
|
|
|
return $revisions;
|
|
}
|
|
|
|
/**
|
|
* Returns the latest revision ID and count of revisions for a post.
|
|
*
|
|
* @since 6.1.0
|
|
*
|
|
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
|
|
* @return array|WP_Error {
|
|
* Returns associative array with latest revision ID and total count,
|
|
* or a WP_Error if the post does not exist or revisions are not enabled.
|
|
*
|
|
* @type int $latest_id The latest revision post ID or 0 if no revisions exist.
|
|
* @type int $count The total count of revisions for the given post.
|
|
* }
|
|
*/
|
|
function wp_get_latest_revision_id_and_total_count( $post = 0 ) {
|
|
$post = get_post( $post );
|
|
|
|
if ( ! $post ) {
|
|
return new WP_Error( 'invalid_post', __( 'Invalid post.' ) );
|
|
}
|
|
|
|
if ( ! wp_revisions_enabled( $post ) ) {
|
|
return new WP_Error( 'revisions_not_enabled', __( 'Revisions not enabled.' ) );
|
|
}
|
|
|
|
$args = array(
|
|
'post_parent' => $post->ID,
|
|
'fields' => 'ids',
|
|
'post_type' => 'revision',
|
|
'post_status' => 'inherit',
|
|
'order' => 'DESC',
|
|
'orderby' => 'date ID',
|
|
'posts_per_page' => 1,
|
|
'ignore_sticky_posts' => true,
|
|
);
|
|
|
|
$revision_query = new WP_Query();
|
|
$revisions = $revision_query->query( $args );
|
|
|
|
if ( ! $revisions ) {
|
|
return array(
|
|
'latest_id' => 0,
|
|
'count' => 0,
|
|
);
|
|
}
|
|
|
|
return array(
|
|
'latest_id' => $revisions[0],
|
|
'count' => $revision_query->found_posts,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Returns the url for viewing and potentially restoring revisions of a given post.
|
|
*
|
|
* @since 5.9.0
|
|
*
|
|
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
|
|
* @return string|null The URL for editing revisions on the given post, otherwise null.
|
|
*/
|
|
function wp_get_post_revisions_url( $post = 0 ) {
|
|
$post = get_post( $post );
|
|
|
|
if ( ! $post instanceof WP_Post ) {
|
|
return null;
|
|
}
|
|
|
|
// If the post is a revision, return early.
|
|
if ( 'revision' === $post->post_type ) {
|
|
return get_edit_post_link( $post );
|
|
}
|
|
|
|
if ( ! wp_revisions_enabled( $post ) ) {
|
|
return null;
|
|
}
|
|
|
|
$revisions = wp_get_latest_revision_id_and_total_count( $post->ID );
|
|
|
|
if ( is_wp_error( $revisions ) || 0 === $revisions['count'] ) {
|
|
return null;
|
|
}
|
|
|
|
return get_edit_post_link( $revisions['latest_id'] );
|
|
}
|
|
|
|
/**
|
|
* Determines whether revisions are enabled for a given post.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param WP_Post $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;
|
|
}
|
|
|
|
/**
|
|
* Determines how many revisions to retain for a given post.
|
|
*
|
|
* By default, an infinite number of revisions are kept.
|
|
*
|
|
* The constant WP_POST_REVISIONS can be set in wp-config to specify the limit
|
|
* of revisions to keep.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param WP_Post $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 = (int) $num;
|
|
}
|
|
|
|
if ( ! post_type_supports( $post->post_type, 'revisions' ) ) {
|
|
$num = 0;
|
|
}
|
|
|
|
/**
|
|
* Filters the number of revisions to save for the given post.
|
|
*
|
|
* Overrides the value of WP_POST_REVISIONS.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param int $num Number of revisions to store.
|
|
* @param WP_Post $post Post object.
|
|
*/
|
|
$num = apply_filters( 'wp_revisions_to_keep', $num, $post );
|
|
|
|
/**
|
|
* Filters the number of revisions to save for the given post by its post type.
|
|
*
|
|
* Overrides both the value of WP_POST_REVISIONS and the {@see 'wp_revisions_to_keep'} filter.
|
|
*
|
|
* The dynamic portion of the hook name, `$post->post_type`, refers to
|
|
* the post type slug.
|
|
*
|
|
* Possible hook names include:
|
|
*
|
|
* - `wp_post_revisions_to_keep`
|
|
* - `wp_page_revisions_to_keep`
|
|
*
|
|
* @since 5.8.0
|
|
*
|
|
* @param int $num Number of revisions to store.
|
|
* @param WP_Post $post Post object.
|
|
*/
|
|
$num = apply_filters( "wp_{$post->post_type}_revisions_to_keep", $num, $post );
|
|
|
|
return (int) $num;
|
|
}
|
|
|
|
/**
|
|
* Sets up the post object for preview based on the post autosave.
|
|
*
|
|
* @since 2.7.0
|
|
* @access private
|
|
*
|
|
* @param WP_Post $post
|
|
* @return WP_Post|false
|
|
*/
|
|
function _set_preview( $post ) {
|
|
if ( ! is_object( $post ) ) {
|
|
return $post;
|
|
}
|
|
|
|
$preview = wp_get_post_autosave( $post->ID );
|
|
|
|
if ( is_object( $preview ) ) {
|
|
$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 );
|
|
add_filter( 'get_post_metadata', '_wp_preview_post_thumbnail_filter', 10, 3 );
|
|
add_filter( 'get_post_metadata', '_wp_preview_meta_filter', 10, 4 );
|
|
|
|
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( __( 'Sorry, you are not allowed to preview drafts.' ), 403 );
|
|
}
|
|
|
|
add_filter( 'the_preview', '_set_preview' );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filters terms lookup to set the post format.
|
|
*
|
|
* @since 3.6.0
|
|
* @access private
|
|
*
|
|
* @param array $terms
|
|
* @param int $post_id
|
|
* @param string $taxonomy
|
|
* @return array
|
|
*/
|
|
function _wp_preview_terms_filter( $terms, $post_id, $taxonomy ) {
|
|
$post = get_post();
|
|
|
|
if ( ! $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();
|
|
} else {
|
|
$term = get_term_by( 'slug', 'post-format-' . sanitize_key( $_REQUEST['post_format'] ), 'post_format' );
|
|
|
|
if ( $term ) {
|
|
$terms = array( $term ); // Can only have one post format.
|
|
}
|
|
}
|
|
|
|
return $terms;
|
|
}
|
|
|
|
/**
|
|
* Filters post thumbnail lookup to set the post thumbnail.
|
|
*
|
|
* @since 4.6.0
|
|
* @access private
|
|
*
|
|
* @param null|array|string $value The value to return - a single metadata value, or an array of values.
|
|
* @param int $post_id Post ID.
|
|
* @param string $meta_key Meta key.
|
|
* @return null|array The default return value or the post thumbnail meta array.
|
|
*/
|
|
function _wp_preview_post_thumbnail_filter( $value, $post_id, $meta_key ) {
|
|
$post = get_post();
|
|
|
|
if ( ! $post ) {
|
|
return $value;
|
|
}
|
|
|
|
if ( empty( $_REQUEST['_thumbnail_id'] ) || empty( $_REQUEST['preview_id'] )
|
|
|| $post->ID !== $post_id || $post_id !== (int) $_REQUEST['preview_id']
|
|
|| '_thumbnail_id' !== $meta_key || 'revision' === $post->post_type
|
|
) {
|
|
return $value;
|
|
}
|
|
|
|
$thumbnail_id = (int) $_REQUEST['_thumbnail_id'];
|
|
|
|
if ( $thumbnail_id <= 0 ) {
|
|
return '';
|
|
}
|
|
|
|
return (string) $thumbnail_id;
|
|
}
|
|
|
|
/**
|
|
* Gets the post revision version.
|
|
*
|
|
* @since 3.6.0
|
|
* @access private
|
|
*
|
|
* @param WP_Post $revision
|
|
* @return int|false
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Upgrades the revisions author, adds the current post as a revision and sets the revisions version to 1.
|
|
*
|
|
* @since 3.6.0
|
|
* @access private
|
|
*
|
|
* @global wpdb $wpdb WordPress database abstraction object.
|
|
*
|
|
* @param WP_Post $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 - HOUR_IN_SECONDS ) {
|
|
// 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;
|
|
}
|
|
|
|
/**
|
|
* Filters preview post meta retrieval to get values from the autosave.
|
|
*
|
|
* Filters revisioned meta keys only.
|
|
*
|
|
* @since 6.4.0
|
|
*
|
|
* @param mixed $value Meta value to filter.
|
|
* @param int $object_id Object ID.
|
|
* @param string $meta_key Meta key to filter a value for.
|
|
* @param bool $single Whether to return a single value. Default false.
|
|
* @return mixed Original meta value if the meta key isn't revisioned, the object doesn't exist,
|
|
* the post type is a revision or the post ID doesn't match the object ID.
|
|
* Otherwise, the revisioned meta value is returned for the preview.
|
|
*/
|
|
function _wp_preview_meta_filter( $value, $object_id, $meta_key, $single ) {
|
|
|
|
$post = get_post();
|
|
if (
|
|
empty( $post ) ||
|
|
$post->ID !== $object_id ||
|
|
! in_array( $meta_key, wp_post_revision_meta_keys( $post->post_type ), true ) ||
|
|
'revision' === $post->post_type
|
|
) {
|
|
return $value;
|
|
}
|
|
|
|
$preview = wp_get_post_autosave( $post->ID );
|
|
if ( false === $preview ) {
|
|
return $value;
|
|
}
|
|
|
|
return get_post_meta( $preview->ID, $meta_key, $single );
|
|
}
|