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<?php
/**
* A parent class for those modules that offers a piece of code to
* setup the server (gzip and caching)
*
* @package Hummingbird\Core
*/
namespace Hummingbird\Core;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Class Module_Server extends Module
*/
abstract class Module_Server extends Module {
/**
* Module slug (used in transient).
*
* @var bool|string $transient_slug
*/
protected $transient_slug = false;
/**
* Module status.
*
* @var array $status
*/
protected $status;
/**
* Execute the module actions. It must be defined in subclasses. Executed when module is active.
*/
public function run() {}
/**
* Initializes the module. Always executed even if the module is deactivated.
*
* Do not use __construct in subclasses, use init() instead
*/
public function init() {}
/**
* Return the analyzed data for the module
*
* @param bool $force If set to true, cache will be cleared before getting the data.
* @param bool $check_api If set to true, the api will be checked.
*
* @return mixed Analysis data
*/
public function get_analysis_data( $force = false, $check_api = false ) {
if ( ! $this->transient_slug ) {
return false;
}
$transient = 'wphb-' . $this->transient_slug . '-data';
$this->status = get_site_option( $transient );
if ( $force || ! $this->status || $check_api ) {
$this->clear_cache();
$this->status = $this->analyze_data( $check_api );
update_site_option( $transient, $this->status );
return $this->status;
}
return $this->status;
}
/**
* Analyze the data
*
* @param bool $check_api If set to true, the api will be checked.
*
* @return mixed
*/
abstract protected function analyze_data( $check_api = false );
/**
* Implement abstract parent method for clearing cache.
*/
public function clear_cache() {
delete_site_option( 'wphb-' . $this->transient_slug . '-data' );
}
/**
* Get the server code snippet
*
* @param string $server Server name (nginx,apache...).
* @param array $expiry_times Type expiry times (javascript, css...).
*
* @return string
*/
public function get_server_code_snippet( $server, $expiry_times = array() ) {
$method = 'get_' . str_replace( array( '-', ' ' ), '', strtolower( $server ) ) . '_code';
if ( ! method_exists( $this, $method ) ) {
return '';
}
return call_user_func_array( array( $this, $method ), array( $expiry_times ) );
}
/**
* Return the server type (Apache, NGINX...)
*
* @return string Server type
*/
public static function get_server_type() {
global $is_apache, $is_IIS, $is_iis7, $is_nginx;
$type = '';
if ( $is_apache ) {
// It's a common configuration to use nginx in front of Apache.
// Let's make sure that this server is Apache.
$response = wp_remote_get( home_url() );
if ( is_wp_error( $response ) ) {
// Bad luck.
$type = 'apache';
} else {
$server = strtolower( wp_remote_retrieve_header( $response, 'server' ) );
// Could be LiteSpeed too.
$type = strpos( $server, 'nginx' ) !== false ? 'nginx' : 'apache';
}
} elseif ( $is_nginx ) {
$type = 'nginx';
} elseif ( $is_IIS ) {
$type = 'IIS';
} elseif ( $is_iis7 ) {
$type = 'IIS 7';
}
return apply_filters( 'wp_hummingbird_is_active_module_cloudflare', $type );
}
/**
* Get a list of server types
*
* @return array
*/
public static function get_servers() {
return array(
'apache' => 'Apache',
'nginx' => 'NGINX',
'iis' => 'IIS',
'cloudflare' => 'Cloudflare',
);
}
/**
* Get code snippet for a module and server type
*
* @param string $module Module name.
* @param string $server_type Server type (nginx, apache...).
* @param array $expiry_times Type expiry times (javascript, css...).
*
* @return string Code snippet
*/
public static function get_code_snippet( $module, $server_type = '', $expiry_times = array() ) {
$module = Utils::get_module( $module );
if ( ! $module ) {
return '';
}
if ( ! $server_type ) {
$server_type = self::get_server_type();
}
return apply_filters( 'wphb_code_snippet', $module->get_server_code_snippet( $server_type, $expiry_times ), $server_type, $module );
}
/**
* Check if .htaccess is writable.
*
* @return bool
*/
public static function is_htaccess_writable() {
if ( ! function_exists( 'get_home_path' ) ) {
require_once ABSPATH . 'wp-admin/includes/file.php';
}
$home_path = get_home_path();
return ( ! file_exists( $home_path . '.htaccess' ) && is_writable( $home_path ) ) || is_writable( $home_path . '.htaccess' );
}
/**
* Check if .htaccess has Hummingbird caching or gzip rules in place.
*
* @param string $module Module slug.
*
* @return bool
*/
public static function is_htaccess_written( $module = '' ) {
if ( ! function_exists( 'get_home_path' ) ) {
require_once ABSPATH . 'wp-admin/includes/file.php';
}
if ( ! function_exists( 'extract_from_markers' ) ) {
require_once ABSPATH . 'wp-admin/includes/misc.php';
}
$existing_rules = array_filter( extract_from_markers( get_home_path() . '.htaccess', 'WP-HUMMINGBIRD-' . strtoupper( $module ) ) );
return ! empty( $existing_rules );
}
/**
* Add rules .htaccess file.
*
* @param string $module Gzip or caching module.
*
* @return bool
*/
public static function save_htaccess( $module ) {
if ( self::is_htaccess_written( $module ) ) {
return false;
}
$htaccess_file = get_home_path() . '.htaccess';
if ( self::is_htaccess_writable() ) {
$code = self::get_code_snippet( $module, 'apache' );
$code = explode( "\n", $code );
return insert_with_markers( $htaccess_file, 'WP-HUMMINGBIRD-' . strtoupper( $module ), $code );
}
return false;
}
/**
* Remove rules from .htaccess file.
*
* @param string $module Module.
*
* @return bool
*/
public static function unsave_htaccess( $module ) {
if ( ! self::is_htaccess_written( $module ) ) {
return false;
}
$htaccess_file = get_home_path() . '.htaccess';
if ( self::is_htaccess_writable() ) {
return insert_with_markers( $htaccess_file, 'WP-HUMMINGBIRD-' . strtoupper( $module ), '' );
}
return false;
}
}
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