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<?php
/**
* Sitemap class for handling sitemap-related services in SmartCrawl.
*
* @package SmartCrawl
*/
namespace SmartCrawl\Sitemaps;
use SmartCrawl\Admin\Settings\Admin_Settings;
use SmartCrawl\Settings;
/**
* Abstract class Sitemap
*
* Provides a base for all sitemap classes.
*/
abstract class Sitemap {
const SITEMAP_TYPE_INDEX = 'index';
/**
* Adds rewrite rules for the sitemap.
*
* @return mixed
*/
abstract public function add_rewrites();
/**
* Checks if the request can be handled by the sitemap.
*
* @return mixed
*/
abstract public function can_handle_request();
/**
* Performs a fallback action if the request cannot be handled.
*
* @return mixed
*/
abstract public function do_fallback();
/**
* Serves the sitemap.
*
* @return mixed
*/
abstract public function serve();
/**
* Checks if the sitemap is enabled.
*
* @return bool True if the sitemap is enabled, false otherwise.
*/
public function is_enabled() {
return Settings::get_setting( 'sitemap' )
&& Admin_Settings::is_tab_allowed( Settings::TAB_SITEMAP );
}
/**
* Outputs the XML content.
*
* @param string $xml The XML content to output.
* @param bool $gzip Whether to gzip the output.
*
* @return void
*/
protected function output_xml( $xml, $gzip ) {
if ( ! headers_sent() ) {
status_header( 200 );
// Prevent the search engines from indexing the XML Sitemap.
header( 'X-Robots-Tag: noindex, follow' );
header( 'Content-Type: text/xml; charset=UTF-8' );
if (
$this->is_gzip_supported()
&& function_exists( 'gzencode' )
&& $gzip
) {
header( 'Content-Encoding: gzip' );
$xml = gzencode( $xml );
}
die( $xml ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
}
/**
* Checks if gzip is supported.
*
* @return bool True if gzip is supported, false otherwise.
*/
private function is_gzip_supported() {
$accepted = (string) \smartcrawl_get_array_value( $_SERVER, 'HTTP_ACCEPT_ENCODING' );
return stripos( $accepted, 'gzip' ) !== false;
}
/**
* Performs a 404 action.
*
* @return void
*/
protected function do_404() {
global $wp_query;
$wp_query->set_404();
status_header( 404 );
}
}