465 lines
16 KiB
PHP
465 lines
16 KiB
PHP
<?php
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/**
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* WordPress Administration Revisions API
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*
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* @package WordPress
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* @subpackage Administration
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* @since 3.6.0
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*/
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/**
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* Get the revision UI diff.
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*
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* @since 3.6.0
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*
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* @param WP_Post|int $post The post object or post ID.
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* @param int $compare_from The revision ID to compare from.
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* @param int $compare_to The revision ID to come to.
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*
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* @return array|bool Associative array of a post's revisioned fields and their diffs.
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* Or, false on failure.
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*/
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function wp_get_revision_ui_diff( $post, $compare_from, $compare_to ) {
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$post = get_post( $post );
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if ( ! $post ) {
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return false;
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}
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if ( $compare_from ) {
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$compare_from = get_post( $compare_from );
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if ( ! $compare_from ) {
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return false;
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}
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} else {
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// If we're dealing with the first revision...
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$compare_from = false;
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}
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$compare_to = get_post( $compare_to );
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if ( ! $compare_to ) {
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return false;
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}
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// If comparing revisions, make sure we're dealing with the right post parent.
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// The parent post may be a 'revision' when revisions are disabled and we're looking at autosaves.
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if ( $compare_from && $compare_from->post_parent !== $post->ID && $compare_from->ID !== $post->ID ) {
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return false;
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}
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if ( $compare_to->post_parent !== $post->ID && $compare_to->ID !== $post->ID ) {
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return false;
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}
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if ( $compare_from && strtotime( $compare_from->post_date_gmt ) > strtotime( $compare_to->post_date_gmt ) ) {
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$temp = $compare_from;
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$compare_from = $compare_to;
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$compare_to = $temp;
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}
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// Add default title if title field is empty.
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if ( $compare_from && empty( $compare_from->post_title ) ) {
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$compare_from->post_title = __( '(no title)' );
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}
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if ( empty( $compare_to->post_title ) ) {
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$compare_to->post_title = __( '(no title)' );
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}
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$return = array();
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foreach ( _wp_post_revision_fields( $post ) as $field => $name ) {
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/**
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* Contextually filter a post revision field.
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*
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* The dynamic portion of the hook name, `$field`, corresponds to each of the post
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* fields of the revision object being iterated over in a foreach statement.
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*
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* @since 3.6.0
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*
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* @param string $revision_field The current revision field to compare to or from.
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* @param string $field The current revision field.
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* @param WP_Post $compare_from The revision post object to compare to or from.
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* @param string $context The context of whether the current revision is the old
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* or the new one. Values are 'to' or 'from'.
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*/
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$content_from = $compare_from ? apply_filters( "_wp_post_revision_field_{$field}", $compare_from->$field, $field, $compare_from, 'from' ) : '';
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/** This filter is documented in wp-admin/includes/revision.php */
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$content_to = apply_filters( "_wp_post_revision_field_{$field}", $compare_to->$field, $field, $compare_to, 'to' );
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$args = array(
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'show_split_view' => true,
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);
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/**
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* Filters revisions text diff options.
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*
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* Filters the options passed to wp_text_diff() when viewing a post revision.
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*
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* @since 4.1.0
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*
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* @param array $args {
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* Associative array of options to pass to wp_text_diff().
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*
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* @type bool $show_split_view True for split view (two columns), false for
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* un-split view (single column). Default true.
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* }
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* @param string $field The current revision field.
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* @param WP_Post $compare_from The revision post to compare from.
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* @param WP_Post $compare_to The revision post to compare to.
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*/
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$args = apply_filters( 'revision_text_diff_options', $args, $field, $compare_from, $compare_to );
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$diff = wp_text_diff( $content_from, $content_to, $args );
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if ( ! $diff && 'post_title' === $field ) {
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// It's a better user experience to still show the Title, even if it didn't change.
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// No, you didn't see this.
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$diff = '<table class="diff"><colgroup><col class="content diffsplit left"><col class="content diffsplit middle"><col class="content diffsplit right"></colgroup><tbody><tr>';
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// In split screen mode, show the title before/after side by side.
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if ( true === $args['show_split_view'] ) {
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$diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td><td></td><td>' . esc_html( $compare_to->post_title ) . '</td>';
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} else {
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$diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td>';
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// In single column mode, only show the title once if unchanged.
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if ( $compare_from->post_title !== $compare_to->post_title ) {
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$diff .= '</tr><tr><td>' . esc_html( $compare_to->post_title ) . '</td>';
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}
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}
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$diff .= '</tr></tbody>';
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$diff .= '</table>';
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}
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if ( $diff ) {
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$return[] = array(
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'id' => $field,
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'name' => $name,
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'diff' => $diff,
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);
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}
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}
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/**
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* Filters the fields displayed in the post revision diff UI.
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*
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* @since 4.1.0
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*
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* @param array[] $return Array of revision UI fields. Each item is an array of id, name, and diff.
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* @param WP_Post $compare_from The revision post to compare from.
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* @param WP_Post $compare_to The revision post to compare to.
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*/
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return apply_filters( 'wp_get_revision_ui_diff', $return, $compare_from, $compare_to );
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}
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/**
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* Prepare revisions for JavaScript.
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*
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* @since 3.6.0
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*
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* @param WP_Post|int $post The post object or post ID.
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* @param int $selected_revision_id The selected revision ID.
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* @param int $from Optional. The revision ID to compare from.
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*
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* @return array An associative array of revision data and related settings.
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*/
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function wp_prepare_revisions_for_js( $post, $selected_revision_id, $from = null ) {
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$post = get_post( $post );
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$authors = array();
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$now_gmt = time();
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$revisions = wp_get_post_revisions(
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$post->ID,
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array(
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'order' => 'ASC',
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'check_enabled' => false,
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)
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);
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// If revisions are disabled, we only want autosaves and the current post.
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if ( ! wp_revisions_enabled( $post ) ) {
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foreach ( $revisions as $revision_id => $revision ) {
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if ( ! wp_is_post_autosave( $revision ) ) {
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unset( $revisions[ $revision_id ] );
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}
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}
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$revisions = array( $post->ID => $post ) + $revisions;
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}
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$show_avatars = get_option( 'show_avatars' );
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cache_users( wp_list_pluck( $revisions, 'post_author' ) );
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$can_restore = current_user_can( 'edit_post', $post->ID );
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$current_id = false;
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foreach ( $revisions as $revision ) {
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$modified = strtotime( $revision->post_modified );
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$modified_gmt = strtotime( $revision->post_modified_gmt . ' +0000' );
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if ( $can_restore ) {
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$restore_link = str_replace(
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'&',
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'&',
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wp_nonce_url(
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add_query_arg(
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array(
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'revision' => $revision->ID,
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'action' => 'restore',
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),
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admin_url( 'revision.php' )
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),
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"restore-post_{$revision->ID}"
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)
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);
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}
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if ( ! isset( $authors[ $revision->post_author ] ) ) {
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$authors[ $revision->post_author ] = array(
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'id' => (int) $revision->post_author,
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'avatar' => $show_avatars ? get_avatar( $revision->post_author, 32 ) : '',
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'name' => get_the_author_meta( 'display_name', $revision->post_author ),
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);
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}
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$autosave = (bool) wp_is_post_autosave( $revision );
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$current = ! $autosave && $revision->post_modified_gmt === $post->post_modified_gmt;
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if ( $current && ! empty( $current_id ) ) {
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// If multiple revisions have the same post_modified_gmt, highest ID is current.
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if ( $current_id < $revision->ID ) {
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$revisions[ $current_id ]['current'] = false;
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$current_id = $revision->ID;
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} else {
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$current = false;
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}
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} elseif ( $current ) {
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$current_id = $revision->ID;
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}
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$revisions_data = array(
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'id' => $revision->ID,
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'title' => get_the_title( $post->ID ),
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'author' => $authors[ $revision->post_author ],
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'date' => date_i18n( __( 'M j, Y @ H:i' ), $modified ),
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'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), $modified ),
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/* translators: %s: Human-readable time difference. */
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'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( $modified_gmt, $now_gmt ) ),
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'autosave' => $autosave,
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'current' => $current,
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'restoreUrl' => $can_restore ? $restore_link : false,
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);
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/**
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* Filters the array of revisions used on the revisions screen.
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*
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* @since 4.4.0
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*
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* @param array $revisions_data {
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* The bootstrapped data for the revisions screen.
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*
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* @type int $id Revision ID.
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* @type string $title Title for the revision's parent WP_Post object.
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* @type int $author Revision post author ID.
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* @type string $date Date the revision was modified.
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* @type string $dateShort Short-form version of the date the revision was modified.
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* @type string $timeAgo GMT-aware amount of time ago the revision was modified.
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* @type bool $autosave Whether the revision is an autosave.
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* @type bool $current Whether the revision is both not an autosave and the post
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* modified date matches the revision modified date (GMT-aware).
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* @type bool|false $restoreUrl URL if the revision can be restored, false otherwise.
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* }
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* @param WP_Post $revision The revision's WP_Post object.
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* @param WP_Post $post The revision's parent WP_Post object.
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*/
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$revisions[ $revision->ID ] = apply_filters( 'wp_prepare_revision_for_js', $revisions_data, $revision, $post );
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}
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/**
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* If we only have one revision, the initial revision is missing; This happens
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* when we have an autsosave and the user has clicked 'View the Autosave'
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*/
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if ( 1 === sizeof( $revisions ) ) {
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$revisions[ $post->ID ] = array(
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'id' => $post->ID,
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'title' => get_the_title( $post->ID ),
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'author' => $authors[ $post->post_author ],
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'date' => date_i18n( __( 'M j, Y @ H:i' ), strtotime( $post->post_modified ) ),
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'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), strtotime( $post->post_modified ) ),
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/* translators: %s: Human-readable time difference. */
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'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( strtotime( $post->post_modified_gmt ), $now_gmt ) ),
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'autosave' => false,
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'current' => true,
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'restoreUrl' => false,
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);
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$current_id = $post->ID;
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}
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/*
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* If a post has been saved since the last revision (no revisioned fields
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* were changed), we may not have a "current" revision. Mark the latest
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* revision as "current".
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*/
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if ( empty( $current_id ) ) {
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if ( $revisions[ $revision->ID ]['autosave'] ) {
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$revision = end( $revisions );
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while ( $revision['autosave'] ) {
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$revision = prev( $revisions );
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}
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$current_id = $revision['id'];
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} else {
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$current_id = $revision->ID;
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}
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$revisions[ $current_id ]['current'] = true;
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}
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// Now, grab the initial diff.
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$compare_two_mode = is_numeric( $from );
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if ( ! $compare_two_mode ) {
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$found = array_search( $selected_revision_id, array_keys( $revisions ) );
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if ( $found ) {
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$from = array_keys( array_slice( $revisions, $found - 1, 1, true ) );
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$from = reset( $from );
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} else {
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$from = 0;
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}
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}
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$from = absint( $from );
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$diffs = array(
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array(
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'id' => $from . ':' . $selected_revision_id,
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'fields' => wp_get_revision_ui_diff( $post->ID, $from, $selected_revision_id ),
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),
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);
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return array(
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'postId' => $post->ID,
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'nonce' => wp_create_nonce( 'revisions-ajax-nonce' ),
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'revisionData' => array_values( $revisions ),
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'to' => $selected_revision_id,
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'from' => $from,
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'diffData' => $diffs,
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'baseUrl' => parse_url( admin_url( 'revision.php' ), PHP_URL_PATH ),
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'compareTwoMode' => absint( $compare_two_mode ), // Apparently booleans are not allowed.
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'revisionIds' => array_keys( $revisions ),
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);
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}
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/**
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* Print JavaScript templates required for the revisions experience.
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*
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* @since 4.1.0
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*
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* @global WP_Post $post Global post object.
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*/
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function wp_print_revision_templates() {
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global $post;
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?><script id="tmpl-revisions-frame" type="text/html">
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<div class="revisions-control-frame"></div>
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<div class="revisions-diff-frame"></div>
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</script>
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<script id="tmpl-revisions-buttons" type="text/html">
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<div class="revisions-previous">
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<input class="button" type="button" value="<?php echo esc_attr_x( 'Previous', 'Button label for a previous revision' ); ?>" />
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</div>
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<div class="revisions-next">
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<input class="button" type="button" value="<?php echo esc_attr_x( 'Next', 'Button label for a next revision' ); ?>" />
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</div>
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</script>
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<script id="tmpl-revisions-checkbox" type="text/html">
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<div class="revision-toggle-compare-mode">
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<label>
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<input type="checkbox" class="compare-two-revisions"
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<#
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if ( 'undefined' !== typeof data && data.model.attributes.compareTwoMode ) {
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#> checked="checked"<#
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}
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#>
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/>
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<?php esc_html_e( 'Compare any two revisions' ); ?>
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</label>
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</div>
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</script>
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<script id="tmpl-revisions-meta" type="text/html">
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<# if ( ! _.isUndefined( data.attributes ) ) { #>
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<div class="diff-title">
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<# if ( 'from' === data.type ) { #>
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<strong><?php _ex( 'From:', 'Followed by post revision info' ); ?></strong>
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<# } else if ( 'to' === data.type ) { #>
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<strong><?php _ex( 'To:', 'Followed by post revision info' ); ?></strong>
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<# } #>
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<div class="author-card<# if ( data.attributes.autosave ) { #> autosave<# } #>">
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{{{ data.attributes.author.avatar }}}
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<div class="author-info">
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<# if ( data.attributes.autosave ) { #>
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<span class="byline">
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<?php
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printf(
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/* translators: %s: User's display name. */
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__( 'Autosave by %s' ),
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'<span class="author-name">{{ data.attributes.author.name }}</span>'
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);
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?>
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</span>
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<# } else if ( data.attributes.current ) { #>
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<span class="byline">
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<?php
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printf(
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/* translators: %s: User's display name. */
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__( 'Current Revision by %s' ),
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'<span class="author-name">{{ data.attributes.author.name }}</span>'
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);
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?>
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</span>
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<# } else { #>
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<span class="byline">
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<?php
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printf(
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/* translators: %s: User's display name. */
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__( 'Revision by %s' ),
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'<span class="author-name">{{ data.attributes.author.name }}</span>'
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);
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?>
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</span>
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<# } #>
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<span class="time-ago">{{ data.attributes.timeAgo }}</span>
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<span class="date">({{ data.attributes.dateShort }})</span>
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</div>
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<# if ( 'to' === data.type && data.attributes.restoreUrl ) { #>
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<input <?php if ( wp_check_post_lock( $post->ID ) ) { ?>
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disabled="disabled"
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<?php } else { ?>
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<# if ( data.attributes.current ) { #>
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disabled="disabled"
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<# } #>
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<?php } ?>
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<# if ( data.attributes.autosave ) { #>
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type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Autosave' ); ?>" />
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<# } else { #>
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type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Revision' ); ?>" />
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<# } #>
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<# } #>
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</div>
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<# if ( 'tooltip' === data.type ) { #>
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<div class="revisions-tooltip-arrow"><span></span></div>
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<# } #>
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<# } #>
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</script>
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<script id="tmpl-revisions-diff" type="text/html">
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<div class="loading-indicator"><span class="spinner"></span></div>
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<div class="diff-error"><?php _e( 'Sorry, something went wrong. The requested comparison could not be loaded.' ); ?></div>
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<div class="diff">
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<# _.each( data.fields, function( field ) { #>
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<h3>{{ field.name }}</h3>
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{{{ field.diff }}}
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<# }); #>
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</div>
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</script>
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<?php
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}
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