Adding Saburly Headless WP theme inspired by postlights serverless solution
This commit is contained in:
Moris Zen
239
wordpress/wp-content/themes/saburly-headless/inc/api-routes.php
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239
wordpress/wp-content/themes/saburly-headless/inc/api-routes.php
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<?php
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/**
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* Register custom REST API routes.
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*/
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add_action(
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'rest_api_init',
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function () {
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// Define API endpoint arguments
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$slug_arg = [
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'validate_callback' => function ( $param, $request, $key ) {
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return( is_string( $param ) );
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}
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,
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];
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$post_slug_arg = array_merge(
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$slug_arg,
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[
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'description' => 'String representing a valid WordPress post slug',
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]
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);
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$page_slug_arg = array_merge(
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$slug_arg,
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[
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'description' => 'String representing a valid WordPress page slug',
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]
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);
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// Register routes
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register_rest_route( 'api/v1', '/post', [
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'methods' => 'GET',
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'callback' => 'rest_get_post',
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'args' => [
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'slug' => array_merge(
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$post_slug_arg,
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[
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'required' => true,
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]
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),
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],
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] );
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register_rest_route( 'api/v1', '/page', [
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'methods' => 'GET',
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'callback' => 'rest_get_page',
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'args' => [
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'slug' => array_merge(
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$page_slug_arg,
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[
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'required' => true,
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]
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),
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],
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] );
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register_rest_route('api/v1', '/post/preview', [
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'methods' => 'GET',
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'callback' => 'rest_get_post_preview',
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'args' => [
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'id' => [
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'validate_callback' => function ( $param, $request, $key ) {
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return ( is_numeric( $param ) );
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}
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,
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'required' => true,
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'description' => 'Valid WordPress post ID',
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],
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],
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'permission_callback' => function () {
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return current_user_can( 'edit_posts' );
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}
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,
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] );
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}
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);
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/**
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* Respond to a REST API request to get post data.
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*
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* @param WP_REST_Request $request Request.
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* @return WP_REST_Response
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*/
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function rest_get_post( WP_REST_Request $request ) {
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return rest_get_content( $request, 'post', __FUNCTION__ );
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}
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/**
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* Respond to a REST API request to get page data.
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*
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* @param WP_REST_Request $request Request.
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* @return WP_REST_Response
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*/
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function rest_get_page( WP_REST_Request $request ) {
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return rest_get_content( $request, 'page', __FUNCTION__ );
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}
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/**
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* Respond to a REST API request to get post or page data.
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* * Handles changed slugs
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* * Doesn't return posts whose status isn't published
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* * Redirects to the admin when an edit parameter is present
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*
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* @param WP_REST_Request $request Request
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* @param str $type Type
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* @param str $function_name Function name
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* @return WP_REST_Response
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*/
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function rest_get_content( WP_REST_Request $request, $type, $function_name ) {
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$content_in_array = in_array(
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$type,
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[
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'post',
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'page',
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],
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true
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);
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if ( ! $content_in_array ) {
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$type = 'post';
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}
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$slug = $request->get_param( 'slug' );
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$post = get_content_by_slug( $slug, $type );
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if ( ! $post ) {
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return new WP_Error(
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$function_name,
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$slug . ' ' . $type . ' does not exist',
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[
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'status' => 404,
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]
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);
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}
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;
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// Shortcut to WP admin page editor
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$edit = $request->get_param( 'edit' );
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if ( 'true' === $edit ) {
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header( 'Location: /wp-admin/post.php?post=' . $post->ID . '&action=edit' );
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exit;
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}
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$controller = new WP_REST_Posts_Controller( 'post' );
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$data = $controller->prepare_item_for_response( $post, $request );
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$response = $controller->prepare_response_for_collection( $data );
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return new WP_REST_Response( $response );
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}
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/**
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* Returns a post or page given a slug. Returns false if no post matches.
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*
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* @param str $slug Slug
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* @param str $type Valid values are 'post' or 'page'
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* @return Post
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*/
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function get_content_by_slug( $slug, $type = 'post' ) {
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$content_in_array = in_array(
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$type,
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[
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'post',
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'page',
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],
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true
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);
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if ( ! $content_in_array ) {
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$type = 'post';
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}
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$args = [
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'name' => $slug,
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'post_type' => $type,
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'post_status' => 'publish',
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'numberposts' => 1,
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];
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// phpcs:ignore WordPress.VIP.RestrictedFunctions.get_posts_get_posts
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$post_search_results = get_posts( $args );
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if ( !$post_search_results ) {
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// Maybe the slug changed
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// check wp_postmeta table for old slug
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$args = [
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// phpcs:ignore WordPress.VIP.SlowDBQuery.slow_db_query_meta_query
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'meta_query' => [
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[
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'key' => '_wp_old_slug',
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'value' => $post_slug,
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'compare' => '=',
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],
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],
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];
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$query = new WP_Query( $args );
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$post_search_results = $query->posts;
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}
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if ( isset( $post_search_results[0] ) ) {
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return $post_search_results[0];
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}
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return false;
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}
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/**
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* Respond to a REST API request to get a post's latest revision.
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* * Requires a valid _wpnonce on the query string
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* * User must have 'edit_posts' rights
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* * Will return draft revisions of even published posts
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*
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* @param WP_REST_Request $request Rest request.
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* @return WP_REST_Response
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*/
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function rest_get_post_preview( WP_REST_Request $request ) {
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$post_id = $request->get_param( 'id' );
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// Revisions are drafts so here we remove the default 'publish' status
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remove_action( 'pre_get_posts', 'set_default_status_to_publish' );
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$check_enabled = [
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'check_enabled' => false,
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];
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if ( $revisions = wp_get_post_revisions( $post_id, $check_enabled ) ) {
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$last_revision = reset( $revisions );
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$rev_post = wp_get_post_revision( $last_revision->ID );
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$controller = new WP_REST_Posts_Controller( 'post' );
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$data = $controller->prepare_item_for_response( $rev_post, $request );
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} elseif ( $post = get_post( $post_id ) ) { // There are no revisions, just return the saved parent post
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$controller = new WP_REST_Posts_Controller( 'post' );
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$data = $controller->prepare_item_for_response( $post, $request );
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} else {
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$not_found = [
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'status' => 404,
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];
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$error = new WP_Error(
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'rest_get_post_preview',
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'Post ' . $post_id . ' does not exist',
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$not_found
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);
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return $error;
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}
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$response = $controller->prepare_response_for_collection( $data );
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return new WP_REST_Response( $response );
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}
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