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<?php

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class ET_Core_Cache_Directory {

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/**

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* @since 4.0.8

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* @var self

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protected static $_instance;

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/**

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* Whether or not we can write to the cache directory.

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* @since 4.0.8

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* @var bool

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public $can_write;

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/**

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* Absolute path to cache directory

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* @since 4.0.8

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* @var string

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public $path = '';

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/**

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* URL for {@see self::$path}

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* @since 4.0.8

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* @var string

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public $url = '';

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/**

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* @since 4.0.8

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* @var WP_Filesystem_Base

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public $wpfs;

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/**

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* ET_Core_Cache_Directory constructor.

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* @since 4.0.8

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public function __construct() {

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if ( self::$_instance ) {

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et_wrong( 'Use "ET_Core_Cache_Directory::instance()" instead of "new ET_Core_Cache_Directory".' );

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return;

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}

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self::$_instance = $this;

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$this->_initialize();

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}

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/**

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* Determines the cache directory path and url based on where we can write files

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* and whether or not the user has defined a custom path and url.

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* @since 4.0.8

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protected function _initialize() {

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$this->_initialize_wpfs();

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if ( $this->_maybe_use_custom_path() ) {

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return;

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}

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$uploads_dir_info = (object) wp_get_upload_dir();

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$path = et_()->path( WP_CONTENT_DIR, 'et-cache' );

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$url = content_url( 'et-cache' );

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$can_write = $this->wpfs->is_writable( $path ) && ! is_file( $path );

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$can_create = ! $can_write && $this->wpfs->is_writable( WP_CONTENT_DIR );

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if ( ! $can_write && ! $can_create && $this->wpfs->is_writable( $uploads_dir_info->basedir ) ) {

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// We can create our cache directory in the uploads directory

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$can_create = true;

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$path = et_()->path( $uploads_dir_info->basedir, 'et-cache' );

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$url = et_()->path( $uploads_dir_info->baseurl, 'et-cache' );

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}

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$this->can_write = $can_write || $can_create;

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$this->path = $path;

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$this->url = $url;

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$this->_maybe_adjust_path_for_multisite( $uploads_dir_info );

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/**

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* Absolute path to directory where we can store cache files.

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* @since 4.0.8

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* @var string

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define( 'ET_CORE_CACHE_DIR', $this->path );

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/**

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* URL to {@see ET_CORE_CACHE_DIR}.

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* @since 4.0.8

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* @var string

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define( 'ET_CORE_CACHE_DIR_URL', $this->url );

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$this->can_write && et_()->ensure_directory_exists( $this->path );

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}

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/**

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* Ensures that the WP Filesystem API has been initialized.

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* @since??

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* @return WP_Filesystem_Base

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protected function _initialize_wpfs() {

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require_once ABSPATH . 'wp-admin/includes/file.php';

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if ( defined( 'ET_CORE_CACHE_DIR' ) && @WP_Filesystem( array(), ET_CORE_CACHE_DIR, true ) ) {

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// We can write to a user-specified directory

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return $this->wpfs = $GLOBALS['wp_filesystem'];

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}

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if ( @WP_Filesystem( array(), false, true ) ) {

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// We can write to WP_CONTENT_DIR

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return $this->wpfs = $GLOBALS['wp_filesystem'];

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}

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$uploads_dir = (object) wp_get_upload_dir();

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if ( @WP_Filesystem( array(), $uploads_dir->basedir, true ) ) {

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// We can write to the uploads directory

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return $this->wpfs = $GLOBALS['wp_filesystem'];

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}

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// We aren't able to write to the filesystem so let's just make sure $this->wpfs

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// is an instance of the filesystem base class so that calling it won't cause errors.

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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php';

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// Write notice to log when WP_DEBUG is enabled.

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$nl = PHP_EOL;

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$msg = 'Unable to write to filesystem. Please ensure that PHP has write access to one of ';

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$msg .= "the following directories:{$nl}{$nl}\t- WP_CONTENT_DIR{$nl}\t- wp_upload_dir(){$nl}\t- ET_CORE_CACHE_DIR.";

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et_debug( $msg );

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return $this->wpfs = new WP_Filesystem_Base;

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}

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/**

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* Adjusts the path for multisite if necessary.

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* @since 4.0.8

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* @param stdClass $uploads_dir_info (object) wp_get_upload_dir()

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protected function _maybe_adjust_path_for_multisite( $uploads_dir_info ) {

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if ( et_()->starts_with( $this->path, $uploads_dir_info->basedir ) || ! is_multisite() ) {

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return;

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}

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$site = get_site();

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$network_id = $site->site_id;

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$site_id = $site->blog_id;

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$this->path = et_()->path( $this->path, $network_id, $site_id );

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$this->url = et_()->path( $this->url, $network_id, $site_id );

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}

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/**

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* Whether or not the user has defined a custom path for the cache directory.

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* @since 4.0.8

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* @return bool

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protected function _maybe_use_custom_path() {

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if ( ! defined( 'ET_CORE_CACHE_DIR' ) ) {

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return false;

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}

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$this->path = ET_CORE_CACHE_DIR;

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if ( ! $this->can_write = $this->wpfs->is_writable( $this->path ) ) {

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et_wrong( 'ET_CORE_CACHE_DIR is defined but not writable.', true );

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}

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if ( defined( 'ET_CORE_CACHE_DIR_URL' ) ) {

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$this->url = ET_CORE_CACHE_DIR_URL;

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} else {

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et_wrong( 'When ET_CORE_CACHE_DIR is defined, ET_CORE_CACHE_DIR_URL must also be defined.', true );

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}

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return true;

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}

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/**

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* Returns the class instance.

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* @since 4.0.8

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* @return ET_Core_Cache_Directory

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public static function instance() {

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if ( ! self::$_instance ) {

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self::$_instance = new self;

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}

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return self::$_instance;

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}

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}

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