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<?php
// Do not allow directly accessing this file.
if ( ! defined( 'ABSPATH' ) ) {
exit( 'Direct script access denied.' );
}
/**
* Handle generating the dynamic CSS.
*
* @since 3.8.5
*/
class Avada_Dynamic_CSS {
/**
* The mode we'll be using (file/inline).
*
* @static
* @access public
* @var string
*/
public static $mode;
/**
* Constructor.
*
* @access public
*/
public function __construct() {
$this->add_options();
// Set mode.
add_action( 'wp', array( __CLASS__, 'set_mode' ), 20 );
// When a post is saved, reset its caches to force-regenerate the CSS.
add_action( 'save_post', array( $this, 'reset_post_transient' ) );
add_action( 'save_post', array( $this, 'post_update_option' ) );
// When we change the options, reset all caches so that all CSS can be re-generated.
add_action( 'avada_save_options', array( $this, 'reset_all_transients' ) );
add_action( 'avada_save_options', array( $this, 'clear_cache' ) );
add_action( 'avada_save_options', array( $this, 'global_reset_option' ) );
add_action( 'avada_save_options', array( $this, 'clear_cache' ) );
add_action( 'customize_save_after', array( $this, 'reset_all_caches' ) );
// Add the CSS.
add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_dynamic_css' ), 11 );
add_action( 'wp_head', array( $this, 'add_inline_css' ), 999 );
}
/**
* Determine if we're using file mode or inline mode.
*
* @static
* @access public
* @return string file/inline.
*/
public static function set_mode() {
// Check if we're using file mode or inline mode.
// This simply checks the dynamic_css_compiler options.
$mode = ( Avada()->settings->get( 'dynamic_css_compiler' ) ) ? 'file' : 'inline';
// ALWAYS use 'inline' mode when in the customizer.
global $wp_customize;
if ( $wp_customize ) {
return 'inline';
}
// Additional checks for file mode.
if ( 'file' == $mode && self::needs_update() ) {
// Only allow processing 1 file every 5 seconds.
$current_time = (int) time();
$last_time = (int) get_option( 'avada_dynamic_css_time' );
if ( 5 <= ( $current_time - $last_time ) ) {
// If it's been more than 5 seconds since we last compiled a file
// then attempt to write to the file.
// If the file-write succeeds then set mode to 'file'.
// If the file-write fails then set mode to 'inline'.
$mode = ( self::can_write() && self::make_css() ) ? 'file' : 'inline';
// If the file exists then set mode to 'file'
// If it does not exist then set mode to 'inline'.
if ( 'file' == $mode ) {
$mode = ( file_exists( self::file( 'path' ) ) ) ? 'file' : 'inline';
}
} else {
// It's been less than 5 seconds since we last compiled a CSS file.
// In order to prevent server meltdowns on weak servers we'll use inline mode instead.
$mode = 'inline';
}
}
self::$mode = $mode;
}
/**
* Enqueue the dynamic CSS.
*
* @access public
* @return void
*/
public function enqueue_dynamic_css() {
$ver = Avada::get_theme_version();
if ( 'file' == self::$mode ) {
// Yay! we're using a file for our CSS, so enqueue it.
wp_enqueue_style( 'avada-dynamic-css', self::file( 'uri' ), array( 'avada-stylesheet' ), $ver );
}
// In case of no file mode, the CSS file is not enqueued
// but it is added in header.php
// No further action is required here.
}
/**
* This function takes care of creating the CSS.
*
* @static
* @access private
* @return bool true/false depending on whether the file is successfully created or not.
*/
private static function make_css() {
global $wp_filesystem;
// Instantiate the Wordpress filesystem.
if ( empty( $wp_filesystem ) ) {
require_once( ABSPATH . '/wp-admin/includes/file.php' );
WP_Filesystem();
}
// Creates the content of the CSS file.
// We're adding a warning at the top of the file to prevent users from editing it.
// The warning is then followed by the actual CSS content.
$content = "/********* Compiled - Do not edit *********/\n" . avada_dynamic_css_cached();
// When using domain-mapping plugins we have to make sure that any references to the original domain
// are replaced with references to the mapped domain.
// We're also stripping protocols from these domains so that there are no issues with SSL certificates.
if ( defined( 'DOMAIN_MAPPING' ) && DOMAIN_MAPPING ) {
if ( function_exists( 'domain_mapping_siteurl' ) && function_exists( 'get_original_url' ) ) {
// The mapped domain of the site.
$mapped_domain = domain_mapping_siteurl( false );
$mapped_domain = str_replace( 'https://', '//', $mapped_domain );
$mapped_domain = str_replace( 'http://', '//', $mapped_domain );
// The original domain of the site.
$original_domain = get_original_url( 'siteurl' );
$original_domain = str_replace( 'https://', '//', $original_domain );
$original_domain = str_replace( 'http://', '//', $original_domain );
// Replace original domain with mapped domain.
$content = str_replace( $original_domain, $mapped_domain, $content );
}
}
// Replace wp-content url with relative path.
$upload_dir = wp_upload_dir();
$content = str_replace( $upload_dir['baseurl'], '..', $content );
$content = str_replace( content_url(), '../..', $content );
// Strip protocols. This helps avoid any issues with https sites.
$content = str_replace( 'https://', '//', $content );
$content = str_replace( 'http://', '//', $content );
// Since we've already checked if the file is writable in the can_write() method (called by the mode() method)
// it's safe to continue without any additional checks as to the validity of the file.
if ( ! $wp_filesystem->put_contents( self::file( 'path' ), $content, FS_CHMOD_FILE ) ) {
// Writing to the file failed.
return false;
} else {
// Writing to the file succeeded.
// Update the opion in the db so that we know the css for this post has been successfully generated
// and then return true.
$page_id = ( Avada()->get_page_id() ) ? Avada()->get_page_id() : 'global';
$option = get_option( 'avada_dynamic_css_posts', array() );
$option[ $page_id ] = true;
update_option( 'avada_dynamic_css_posts', $option );
// Update the 'avada_dynamic_css_time' option.
self::update_saved_time();
return true;
}
}
/**
* Determines if the CSS file is writable.
*
* @static
* @access private
* @return bool
*/
private static function can_write() {
// Get the blog ID.
$blog_id = 1;
if ( is_multisite() ) {
$current_site = get_blog_details();
$blog_id = $current_site->blog_id;
}
// Get the upload directory for this site.
$upload_dir = wp_upload_dir();
// If this is a multisite installation, append the blogid to the filename.
$blog_id = ( is_multisite() && $blog_id > 1 ) ? '_blog-' . $blog_id : null;
$page_id = ( Avada()->get_page_id() ) ? Avada()->get_page_id() : 'global';
$file_name = '/avada' . $blog_id . '-' . $page_id . '.css';
$folder_path = $upload_dir['basedir'] . DIRECTORY_SEPARATOR . 'avada-styles';
// Does the folder exist?
if ( file_exists( $folder_path ) ) {
// Folder exists, but is it actually writable?
if ( ! is_writable( $folder_path ) ) {
// Folder is not writable.
// Does the file exist?
if ( ! file_exists( $folder_path . $file_name ) ) {
// If the file does not exist, then we can't create it
// since its parent folder is not writable.
return false;
} else {
// The file exists. Is it writable?
if ( ! is_writable( $folder_path . $file_name ) ) {
// Nope, it's not writable.
return false;
}
}
} else {
// The folder is writable.
// Does the file exist?
if ( file_exists( $folder_path . $file_name ) ) {
// File exists. Is it writable?
if ( ! is_writable( $folder_path . $file_name ) ) {
// Nope, it's not writable.
return false;
}
}
}
} else {
// Can we create the folder?
// returns true if yes and false if not.
return wp_mkdir_p( $folder_path );
}
// If we passed all of the above tests
// then the file is writable.
return true;
}
/**
* Gets the css path or url to the stylesheet.
*
* @static
* @access private
* @param string $target path/url.
* @return string Path or url to the file depending on the $target var.
*/
private static function file( $target = 'path' ) {
// Get the blog ID.
if ( is_multisite() ) {
$current_site = get_blog_details();
$blog_id = $current_site->blog_id;
} else {
$blog_id = 1;
}
// Get the upload directory for this site.
$upload_dir = wp_upload_dir();
// If this is a multisite installation, append the blogid to the filename.
$blog_id = ( is_multisite() && $blog_id > 1 ) ? '_blog-' . $blog_id : null;
$page_id = ( Avada()->get_page_id() ) ? Avada()->get_page_id() : 'global';
$file_name = 'avada' . $blog_id . '-' . $page_id . '.css';
$folder_path = $upload_dir['basedir'] . DIRECTORY_SEPARATOR . 'avada-styles';
// The complete path to the file.
$file_path = $folder_path . DIRECTORY_SEPARATOR . $file_name;
// Get the URL directory of the stylesheet.
$css_uri_folder = $upload_dir['baseurl'];
// Build the URL of the file.
$css_uri = trailingslashit( $css_uri_folder ) . 'avada-styles/' . $file_name;
// Take care of domain mapping.
// When using domain mapping we have to make sure that the URL to the file
// does not include the original domain but instead the mapped domain.
if ( defined( 'DOMAIN_MAPPING' ) && DOMAIN_MAPPING ) {
if ( function_exists( 'domain_mapping_siteurl' ) && function_exists( 'get_original_url' ) ) {
$mapped_domain = domain_mapping_siteurl( false );
$original_domain = get_original_url( 'siteurl' );
$css_uri = str_replace( $original_domain, $mapped_domain, $css_uri );
}
}
// Strip protocols from the URL.
// Make sure we don't have any issues with sites using HTTPS/SSL.
$css_uri = str_replace( 'https://', '//', $css_uri );
$css_uri = str_replace( 'http://', '//', $css_uri );
// Return the path or the URL
// depending on the $target we have defined when calling this method.
if ( 'path' == $target ) {
return $file_path;
} elseif ( 'url' == $target || 'uri' == $target ) {
$timestamp = ( file_exists( $file_path ) ) ? '?timestamp=' . filemtime( $file_path ) : '';
return $css_uri . $timestamp;
}
}
/**
* Reset ALL CSS transient caches.
*
* @access public
* @return void
*/
public function reset_all_transients() {
global $wpdb;
// Build the query to delete all avada transients and execute the required SQL.
$sql = "DELETE FROM $wpdb->options WHERE option_name LIKE '_transient_avada_dynamic_css_%'";
$wpdb->query( $sql );
}
/**
* Reset the dynamic CSS transient for a post.
*
* @access public
* @param int $post_id The ID of the post that's being reset.
*/
public function reset_post_transient( $post_id ) {
delete_transient( 'avada_dynamic_css_' . $post_id );
}
/**
* Create settings.
*
* @access private
*/
private function add_options() {
// The 'avada_dynamic_css_posts' option will hold an array of posts that have had their css generated.
// We can use that to keep track of which pages need their CSS to be recreated and which don't.
add_option( 'avada_dynamic_css_time', array(), '', 'yes' );
// The 'avada_dynamic_css_time' option holds the time the file writer was last used.
add_option( 'avada_dynamic_css_time', time(), '', 'yes' );
}
/**
* Update the avada_dynamic_css_posts option when a post is saved.
* This adds the current post's ID in the array of IDs that the 'avada_dynamic_css_posts' option has.
*
* @access public
* @param int $post_id The post ID.
* @return void
*/
public function post_update_option( $post_id ) {
$option = get_option( 'avada_dynamic_css_posts', array() );
$option[ $post_id ] = false;
update_option( 'avada_dynamic_css_posts', $option );
}
/**
* Update the avada_dynemic_css_posts option when the theme options are saved.
* This basically empties the array of page IDS from the 'avada_dynamic_css_posts' option.
*
* @access public
*/
public function global_reset_option() {
update_option( 'avada_dynamic_css_posts', array() );
}
/**
* Do we need to update the CSS file?
*
* @static
* @access public
* @param string $mode The compiling mode we're using.
* @return bool
*/
public static function needs_update( $mode = 'file' ) {
// Get the 'avada_dynamic_css_posts' option from the DB.
$option = get_option( 'avada_dynamic_css_posts', array() );
// Get the current page ID.
$page_id = ( Avada()->get_page_id() ) ? Avada()->get_page_id() : 'global';
// If the CSS file does not exist then we definitely need to regenerate the CSS.
if ( 'file' == $mode && ! file_exists( self::file( 'path' ) ) ) {
return true;
}
// Check if the time of the dynamic-css.php file is newer than the css file itself.
// If yes, then we need to update the css.
// This is primarily added here for development purposes.
$dynamic_css_script = Avada::$template_dir_path . DIRECTORY_SEPARATOR . 'includes' . DIRECTORY_SEPARATOR . 'dynamic_css.php';
if ( 'file' == $mode && filemtime( $dynamic_css_script ) > filemtime( self::file( 'path' ) ) ) {
return true;
}
// If the current page ID exists in the array of pages defined in the 'avada_dynamic_css_posts' option
// then the page has already been compiled and we don't need to re-compile it.
// If it's not in the array then it has not been compiled before so we need to update it.
return ( ! isset( $option[ $page_id ] ) || ! $option[ $page_id ] ) ? true : false;
}
/**
* Update the 'avada_dynamic_css_time' option.
* This will save in the db the last time that the compiler has run.
*
* @static
* @access private
* @return void
*/
private static function update_saved_time() {
update_option( 'avada_dynamic_css_time', time() );
}
/**
* Clear cache from:
* - W3TC,
* - WordPress Total Cache
* - WPEngine
* - Varnish
*
* @access public
*/
public function clear_cache() {
// If W3 Total Cache is being used, clear the cache.
if ( function_exists( 'w3tc_pgcache_flush' ) ) {
w3tc_pgcache_flush();
}
// if WP Super Cache is being used, clear the cache.
if ( function_exists( 'wp_cache_clean_cache' ) ) {
global $file_prefix;
wp_cache_clean_cache( $file_prefix );
}
// If SG CachePress is installed, rese its caches.
if ( class_exists( 'SG_CachePress_Supercacher' ) ) {
if ( is_callable( array( 'SG_CachePress_Supercacher', 'purge_cache' ) ) ) {
SG_CachePress_Supercacher::purge_cache();
}
}
// Clear caches on WPEngine-hosted sites.
if ( class_exists( 'WpeCommon' ) ) {
WpeCommon::purge_memcached();
WpeCommon::clear_maxcdn_cache();
WpeCommon::purge_varnish_cache();
}
// Clear Varnish caches.
if ( Avada()->settings->get( 'dynamic_css_compiler' ) && Avada()->settings->get( 'cache_server_ip' ) ) {
$this->clear_varnish_cache( self::file( 'url' ) );
}
}
/**
* Clear varnish cache for the dynamic CSS file.
*
* @access public
* @param string $url The URL of the file whose cache we want to reset.
* @return void
*/
public function clear_varnish_cache( $url ) {
// Parse the URL for proxy proxies.
$p = wp_parse_url( $url );
$varnish_x_purgemethod = ( isset( $p['query'] ) && ( 'vhp=regex' == $p['query'] ) ) ? 'regex' : 'default';
// Build a varniship.
$varniship = get_option( 'vhp_varnish_ip' );
if ( Avada()->settings->get( 'cache_server_ip' ) ) {
$varniship = Avada()->settings->get( 'cache_server_ip' );
} else if ( defined( 'VHP_VARNISH_IP' ) && VHP_VARNISH_IP != false ) {
$varniship = VHP_VARNISH_IP;
}
// If we made varniship, let it sail.
$purgeme = ( isset( $varniship ) && null != $varniship ) ? $varniship : $p['host'];
wp_remote_request( 'http://' . $purgeme,
array(
'method' => 'PURGE',
'headers' => array(
'host' => $p['host'],
'X-Purge-Method' => $varnish_x_purgemethod,
),
)
);
}
/**
* Add Inline CSS.
*
* @access public
* @return void
*/
public function add_inline_css() {
global $wp_customize;
// Inline Dynamic CSS.
// This is here because we need it after all Avada CSS
// and W3TC can combine it incorrectly.
if ( 'inline' == self::$mode || $wp_customize ) {
echo "<style id='avada-stylesheet-inline-css' type='text/css'>" . avada_dynamic_css_cached() . '</style>';
}
}
/**
* This is just a facilitator that will allow us to reset everything.
* Its only job is calling the other methods from this class and reset parts of our caches.
*
* @access public
* @return void
*/
public function reset_all_caches() {
$this->reset_all_transients();
$this->clear_cache();
$this->global_reset_option();
$this->clear_cache();
}
}
/* Omit closing PHP tag to avoid "Headers already sent" issues. */