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<?php
/**
* Writes compiled CSS to a file.
*
* @package Kirki
* @subpackage CSS Module
* @copyright Copyright (c) 2017, Aristeides Stathopoulos
* @license http://opensource.org/licenses/https://opensource.org/licenses/MIT
* @since 3.0.0
*/
/**
* Handles writing CSS to a file.
*/
class Kirki_CSS_To_File {
/**
* Fallback to inline CSS?
*
* @access protected
* @since 3.0.0
* @var bool
*/
protected $fallback = false;
/**
* Constructor.
*
* @access public
* @since 3.0.0
*/
public function __construct() {
// If the file doesn't exist, create it.
if ( ! file_exists( $this->get_path( 'file' ) ) ) {
// If the file-write fails, fallback to inline
// and cache the failure so we don't try again immediately.
$this->write_file();
}
add_action( 'customize_save_after', array( $this, 'write_file' ) );
}
/**
* Gets the path of the CSS file and folder in the filesystem.
*
* @access protected
* @since 3.0.0
* @param string $context Can be "file" or "folder". If empty, returns both as array.
* @return string|array
*/
protected function get_path( $context = '' ) {
$upload_dir = wp_upload_dir();
$paths = array(
'file' => wp_normalize_path( $upload_dir['basedir'] . '/kirki-css/styles.css' ),
'folder' => wp_normalize_path( $upload_dir['basedir'] . '/kirki-css' ),
);
if ( 'file' === $context ) {
return $paths['file'];
}
if ( 'folder' === $context ) {
return $paths['folder'];
}
return $paths;
}
/**
* Gets the URL of the CSS file in the filesystem.
*
* @access public
* @since 3.0.0
* @return string
*/
public function get_url() {
$upload_dir = wp_upload_dir();
return esc_url_raw( $upload_dir['baseurl'] . '/kirki-css/styles.css' );
}
/**
* Gets the timestamp of the file.
* This will be used as "version" for cache-busting purposes.
*
* @access public
* @since 3.0.0
* @return integer|false
*/
public function get_timestamp() {
if ( file_exists( $this->get_path( 'file' ) ) ) {
return filemtime( $this->get_path( 'file' ) );
}
return false;
}
/**
* Writes the file to disk.
*
* @access public
* @since 3.0.0
* @return bool
*/
public function write_file() {
$css = array();
$configs = Kirki::$config;
foreach ( $configs as $config_id => $args ) {
// Get the CSS we want to write.
$css[ $config_id ] = apply_filters( "kirki/{$config_id}/dynamic_css", Kirki_Modules_CSS::loop_controls( $config_id ) );
}
$css = implode( $css, '' );
// Minimize the CSS a bit.
$css = str_replace( array( "\n", "\t", "\r\n" ), '', $css );
$css = str_replace( array( '{ ', '{ ', '{ ' ), '{', $css );
$css = str_replace( ': ', ':', $css );
$css = str_replace( array( '; ', '; ', '; ' ), ';', $css );
$css = explode( '}', $css );
$css = array_unique( $css );
$css = implode( $css, '}' );
// If the folder doesn't exist, create it.
if ( ! file_exists( $this->get_path( 'folder' ) ) ) {
wp_mkdir_p( $this->get_path( 'folder' ) );
}
$filesystem = $this->get_filesystem();
$write_file = (bool) $filesystem->put_contents( $this->get_path( 'file' ), $css );
if ( ! $write_file ) {
$this->fallback = true;
set_transient( 'kirki_css_write_to_file_failed', true, HOUR_IN_SECONDS );
}
return $write_file;
}
/**
* Gets the WP_Filesystem object.
*
* @access protected
* @since 3.0.0
* @return object
*/
protected function get_filesystem() {
// The WordPress filesystem.
global $wp_filesystem;
if ( empty( $wp_filesystem ) ) {
require_once wp_normalize_path( ABSPATH . '/wp-admin/includes/file.php' );
WP_Filesystem();
}
return $wp_filesystem;
}
}