Source
File: wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
public function get_items( $request ) {
$parent = $this->get_parent( $request['parent'] );
if ( is_wp_error( $parent ) ) {
return $parent;
}
// Ensure a search string is set in case the orderby is set to 'relevance'.
if ( ! empty( $request['orderby'] ) && 'relevance' === $request['orderby'] && empty( $request['search'] ) ) {
return new WP_Error(
'rest_no_search_term_defined',
__( 'You need to define a search term to order by relevance.' ),
array( 'status' => 400 )
);
}
// Ensure an include parameter is set in case the orderby is set to 'include'.
if ( ! empty( $request['orderby'] ) && 'include' === $request['orderby'] && empty( $request['include'] ) ) {
return new WP_Error(
'rest_orderby_include_missing_include',
__( 'You need to define an include parameter to order by include.' ),
array( 'status' => 400 )
);
}
if ( wp_revisions_enabled( $parent ) ) {
$registered = $this->get_collection_params();
$args = array(
'post_parent' => $parent->ID,
'post_type' => 'revision',
'post_status' => 'inherit',
'posts_per_page' => -1,
'orderby' => 'date ID',
'order' => 'DESC',
'suppress_filters' => true,
);
$parameter_mappings = array(
'exclude' => 'post__not_in',
'include' => 'post__in',
'offset' => 'offset',
'order' => 'order',
'orderby' => 'orderby',
'page' => 'paged',
'per_page' => 'posts_per_page',
'search' => 's',
);
foreach ( $parameter_mappings as $api_param => $wp_param ) {
if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
$args[ $wp_param ] = $request[ $api_param ];
}
}
// For backward-compatibility, 'date' needs to resolve to 'date ID'.
if ( isset( $args['orderby'] ) && 'date' === $args['orderby'] ) {
$args['orderby'] = 'date ID';
}
/** This filter is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
$args = apply_filters( 'rest_revision_query', $args, $request );
$query_args = $this->prepare_items_query( $args, $request );
$revisions_query = new WP_Query();
$revisions = $revisions_query->query( $query_args );
$offset = isset( $query_args['offset'] ) ? (int) $query_args['offset'] : 0;
$page = (int) $query_args['paged'];
$total_revisions = $revisions_query->found_posts;
if ( $total_revisions < 1 ) {
// Out-of-bounds, run the query again without LIMIT for total count.
unset( $query_args['paged'], $query_args['offset'] );
$count_query = new WP_Query();
$count_query->query( $query_args );
$total_revisions = $count_query->found_posts;
}
if ( $revisions_query->query_vars['posts_per_page'] > 0 ) {
$max_pages = ceil( $total_revisions / (int) $revisions_query->query_vars['posts_per_page'] );
} else {
$max_pages = $total_revisions > 0 ? 1 : 0;
}
if ( $total_revisions > 0 ) {
if ( $offset >= $total_revisions ) {
return new WP_Error(
'rest_revision_invalid_offset_number',
__( 'The offset number requested is larger than or equal to the number of available revisions.' ),
array( 'status' => 400 )
);
} elseif ( ! $offset && $page > $max_pages ) {
return new WP_Error(
'rest_revision_invalid_page_number',
__( 'The page number requested is larger than the number of pages available.' ),
array( 'status' => 400 )
);
}
}
} else {
$revisions = array();
$total_revisions = 0;
$max_pages = 0;
$page = (int) $request['page'];
}
$response = array();
foreach ( $revisions as $revision ) {
$data = $this->prepare_item_for_response( $revision, $request );
$response[] = $this->prepare_response_for_collection( $data );
}
$response = rest_ensure_response( $response );
$response->header( 'X-WP-Total', (int) $total_revisions );
$response->header( 'X-WP-TotalPages', (int) $max_pages );
$request_params = $request->get_query_params();
$base = add_query_arg( urlencode_deep( $request_params ), rest_url( sprintf( '%s/%s/%d/%s', $this->namespace, $this->parent_base, $request['parent'], $this->rest_base ) ) );
if ( $page > 1 ) {
$prev_page = $page - 1;
if ( $prev_page > $max_pages ) {
$prev_page = $max_pages;
}
$prev_link = add_query_arg( 'page', $prev_page, $base );
$response->link_header( 'prev', $prev_link );
}
if ( $max_pages > $page ) {
$next_page = $page + 1;
$next_link = add_query_arg( 'page', $next_page, $base );
$response->link_header( 'next', $next_link );
}
return $response;
}