Add filter for search_pattern in handle_generate_endpoint

[cguagenti]

Context:

I'm testing Faust with WordPress Bedrock, and due to the different structure, when previewing content, it results in a 404 error.

This issue is caused by the $search_pattern in handle_generate_endpoint().

faustjs/plugins/faustwp/includes/auth/callbacks.php

Lines 24 to 29 in 002687f

	function handle_generate_endpoint() {
	$search_pattern = ':^' . site_url( '/generate', 'relative' ) . ':';
	if ( ! preg_match( $search_pattern, $_SERVER['REQUEST_URI'] ) ) { // phpcs:ignore WordPress.Security
	return;
	}

Because Bedrock returns the prefix /wp/ in site_url( '/generate', 'relative' ) (/wp/generate) while $_SERVER['REQUEST_URI'] contains only /generate[...], it always fails at the statement below:

if ( ! preg_match( $search_pattern, $_SERVER['REQUEST_URI'] ) ) { // phpcs:ignore WordPress.Security
	return;
}

Suggestion

Since site_url() returns the URL for the current site where WordPress applications are accessible, the best way to move forward is to use a callback filter (apply_filters) so anyone can customize it with a callback filter.

/**
* Filter 'faustwp_generate_endpoint_search_pattern'.
*
* @param string  $value   The search pattern.
*/
$search_pattern = apply_filters( 'faustwp_generate_endpoint_search_pattern', $search_pattern );

Example of how to use the filter

add_filter('faustwp_generate_endpoint_search_pattern', function ($value) {
	return str_replace('/wp/', '/', $value);
});

[jan-clockworkwp]

Hey @theodesp, I am confirming that @cguagenti suggestion solves previews pages 404 issue on non-WordPress standard installations where admin url differs from the siteurl. Can we hope to have that filter added to the official package, or maybe as an option in the plugin options? Many thanks.