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Current File : /usr/src/litespeed-wp-plugin/7.1/litespeed-cache/src/utility.cls.php
<?php

/**
 * The utility class.
 *
 * @since      	1.1.5
 * @since  		1.5 Moved into /inc
 */

namespace LiteSpeed;

defined('WPINC') || exit();

class Utility extends Root
{
	private static $_internal_domains;

	/**
	 * Validate regex
	 *
	 * @since 1.0.9
	 * @since  3.0 Moved here from admin-settings.cls
	 * @access public
	 * @return bool True for valid rules, false otherwise.
	 */
	public static function syntax_checker($rules)
	{
		return preg_match(self::arr2regex($rules), '') !== false;
	}

	/**
	 * Combine regex array to regex rule
	 *
	 * @since  3.0
	 */
	public static function arr2regex($arr, $drop_delimiter = false)
	{
		$arr = self::sanitize_lines($arr);

		$new_arr = array();
		foreach ($arr as $v) {
			$new_arr[] = preg_quote($v, '#');
		}

		$regex = implode('|', $new_arr);
		$regex = str_replace(' ', '\\ ', $regex);

		if ($drop_delimiter) {
			return $regex;
		}

		return '#' . $regex . '#';
	}

	/**
	 * Replace wildcard to regex
	 *
	 * @since  3.2.2
	 */
	public static function wildcard2regex($string)
	{
		if (is_array($string)) {
			return array_map(__CLASS__ . '::wildcard2regex', $string);
		}

		if (strpos($string, '*') !== false) {
			$string = preg_quote($string, '#');
			$string = str_replace('\*', '.*', $string);
		}

		return $string;
	}

	/**
	 * Check if an URL or current page is REST req or not
	 *
	 * @since  2.9.3
	 * @deprecated 2.9.4 Moved to REST class
	 * @access public
	 */
	public static function is_rest($url = false)
	{
		return false;
	}

	/**
	 * Get current page type
	 *
	 * @since  2.9
	 */
	public static function page_type()
	{
		global $wp_query;
		$page_type = 'default';

		if ($wp_query->is_page) {
			$page_type = is_front_page() ? 'front' : 'page';
		} elseif ($wp_query->is_home) {
			$page_type = 'home';
		} elseif ($wp_query->is_single) {
			// $page_type = $wp_query->is_attachment ? 'attachment' : 'single';
			$page_type = get_post_type();
		} elseif ($wp_query->is_category) {
			$page_type = 'category';
		} elseif ($wp_query->is_tag) {
			$page_type = 'tag';
		} elseif ($wp_query->is_tax) {
			$page_type = 'tax';
			// $page_type = get_queried_object()->taxonomy;
		} elseif ($wp_query->is_archive) {
			if ($wp_query->is_day) {
				$page_type = 'day';
			} elseif ($wp_query->is_month) {
				$page_type = 'month';
			} elseif ($wp_query->is_year) {
				$page_type = 'year';
			} elseif ($wp_query->is_author) {
				$page_type = 'author';
			} else {
				$page_type = 'archive';
			}
		} elseif ($wp_query->is_search) {
			$page_type = 'search';
		} elseif ($wp_query->is_404) {
			$page_type = '404';
		}

		return $page_type;

		// if ( is_404() ) {
		// 	$page_type = '404';
		// }
		// elseif ( is_singular() ) {
		// 	$page_type = get_post_type();
		// }
		// elseif ( is_home() && get_option( 'show_on_front' ) == 'page' ) {
		// 	$page_type = 'home';
		// }
		// elseif ( is_front_page() ) {
		// 	$page_type = 'front';
		// }
		// elseif ( is_tax() ) {
		// 	$page_type = get_queried_object()->taxonomy;
		// }
		// elseif ( is_category() ) {
		// 	$page_type = 'category';
		// }
		// elseif ( is_tag() ) {
		// 	$page_type = 'tag';
		// }

		// return $page_type;
	}

	/**
	 * Get ping speed
	 *
	 * @since  2.9
	 */
	public static function ping($domain)
	{
		if (strpos($domain, ':')) {
			$domain = parse_url($domain, PHP_URL_HOST);
		}
		$starttime = microtime(true);
		$file = fsockopen($domain, 443, $errno, $errstr, 10);
		$stoptime = microtime(true);
		$status = 0;

		if (!$file) {
			$status = 99999;
		}
		// Site is down
		else {
			fclose($file);
			$status = ($stoptime - $starttime) * 1000;
			$status = floor($status);
		}

		Debug2::debug("[Util] ping [Domain] $domain \t[Speed] $status");

		return $status;
	}

	/**
	 * Set seconds/timestamp to readable format
	 *
	 * @since  1.6.5
	 * @access public
	 */
	public static function readable_time($seconds_or_timestamp, $timeout = 3600, $forward = false)
	{
		if (strlen($seconds_or_timestamp) == 10) {
			$seconds = time() - $seconds_or_timestamp;
			if ($seconds > $timeout) {
				return date('m/d/Y H:i:s', $seconds_or_timestamp + LITESPEED_TIME_OFFSET);
			}
		} else {
			$seconds = $seconds_or_timestamp;
		}

		$res = '';
		if ($seconds > 86400) {
			$num = floor($seconds / 86400);
			$res .= $num . 'd';
			$seconds %= 86400;
		}

		if ($seconds > 3600) {
			if ($res) {
				$res .= ', ';
			}
			$num = floor($seconds / 3600);
			$res .= $num . 'h';
			$seconds %= 3600;
		}

		if ($seconds > 60) {
			if ($res) {
				$res .= ', ';
			}
			$num = floor($seconds / 60);
			$res .= $num . 'm';
			$seconds %= 60;
		}

		if ($seconds > 0) {
			if ($res) {
				$res .= ' ';
			}
			$res .= $seconds . 's';
		}

		if (!$res) {
			return $forward ? __('right now', 'litespeed-cache') : __('just now', 'litespeed-cache');
		}

		$res = $forward ? $res : sprintf(__(' %s ago', 'litespeed-cache'), $res);

		return $res;
	}

	/**
	 * Convert array to string
	 *
	 * @since  1.6
	 * @access public
	 */
	public static function arr2str($arr)
	{
		if (!is_array($arr)) {
			return $arr;
		}

		return base64_encode(\json_encode($arr));
	}

	/**
	 * Get human readable size
	 *
	 * @since  1.6
	 * @access public
	 */
	public static function real_size($filesize, $is_1000 = false)
	{
		$unit = $is_1000 ? 1000 : 1024;

		if ($filesize >= pow($unit, 3)) {
			$filesize = round(($filesize / pow($unit, 3)) * 100) / 100 . 'G';
		} elseif ($filesize >= pow($unit, 2)) {
			$filesize = round(($filesize / pow($unit, 2)) * 100) / 100 . 'M';
		} elseif ($filesize >= $unit) {
			$filesize = round(($filesize / $unit) * 100) / 100 . 'K';
		} else {
			$filesize = $filesize . 'B';
		}
		return $filesize;
	}

	/**
	 * Parse attributes from string
	 *
	 * @since  1.2.2
	 * @since  1.4 Moved from optimize to utility
	 * @access private
	 * @param  string $str
	 * @return array  All the attributes
	 */
	public static function parse_attr($str)
	{
		$attrs = array();
		preg_match_all('#([\w-]+)=(["\'])([^\2]*)\2#isU', $str, $matches, PREG_SET_ORDER);
		foreach ($matches as $match) {
			$attrs[$match[1]] = trim($match[3]);
		}
		return $attrs;
	}

	/**
	 * Check if an array has a string
	 *
	 * Support $ exact match
	 *
	 * @since 1.3
	 * @access private
	 * @param string $needle The string to search with
	 * @param array $haystack
	 * @return bool|string False if not found, otherwise return the matched string in haystack.
	 */
	public static function str_hit_array($needle, $haystack, $has_ttl = false)
	{
		if (!$haystack) {
			return false;
		}
		/**
		 * Safety check to avoid PHP warning
		 * @see  https://github.com/litespeedtech/lscache_wp/pull/131/commits/45fc03af308c7d6b5583d1664fad68f75fb6d017
		 */
		if (!is_array($haystack)) {
			Debug2::debug('[Util] ❌ bad param in str_hit_array()!');

			return false;
		}

		$hit = false;
		$this_ttl = 0;
		foreach ($haystack as $item) {
			if (!$item) {
				continue;
			}

			if ($has_ttl) {
				$this_ttl = 0;
				$item = explode(' ', $item);
				if (!empty($item[1])) {
					$this_ttl = $item[1];
				}
				$item = $item[0];
			}

			if (substr($item, 0, 1) === '^' && substr($item, -1) === '$') {
				// do exact match
				if (substr($item, 1, -1) === $needle) {
					$hit = $item;
					break;
				}
			} elseif (substr($item, -1) === '$') {
				// match end
				if (substr($item, 0, -1) === substr($needle, -strlen($item) + 1)) {
					$hit = $item;
					break;
				}
			} elseif (substr($item, 0, 1) === '^') {
				// match beginning
				if (substr($item, 1) === substr($needle, 0, strlen($item) - 1)) {
					$hit = $item;
					break;
				}
			} else {
				if (strpos($needle, $item) !== false) {
					$hit = $item;
					break;
				}
			}
		}

		if ($hit) {
			if ($has_ttl) {
				return array($hit, $this_ttl);
			}

			return $hit;
		}

		return false;
	}

	/**
	 * Improve compatibility to PHP old versions
	 *
	 * @since  1.2.2
	 *
	 */
	public static function compatibility()
	{
		require_once LSCWP_DIR . 'lib/php-compatibility.func.php';
	}

	/**
	 * Convert URI to URL
	 *
	 * @since  1.3
	 * @access public
	 * @param  string $uri `xx/xx.html` or `/subfolder/xx/xx.html`
	 * @return  string http://www.example.com/subfolder/xx/xx.html
	 */
	public static function uri2url($uri)
	{
		if (substr($uri, 0, 1) === '/') {
			self::domain_const();
			$url = LSCWP_DOMAIN . $uri;
		} else {
			$url = home_url('/') . $uri;
		}

		return $url;
	}

	/**
	 * Convert URL to basename (filename)
	 *
	 * @since  4.7
	 */
	public static function basename($url)
	{
		$url = trim($url);
		$uri = @parse_url($url, PHP_URL_PATH);
		$basename = pathinfo($uri, PATHINFO_BASENAME);

		return $basename;
	}

	/**
	 * Drop .webp and .avif if existed in filename
	 *
	 * @since  4.7
	 */
	public static function drop_webp($filename)
	{
		if (in_array(substr($filename, -5), array('.webp', '.avif'))) {
			$filename = substr($filename, 0, -5);
		}

		return $filename;
	}

	/**
	 * Convert URL to URI
	 *
	 * @since  1.2.2
	 * @since  1.6.2.1 Added 2nd param keep_qs
	 * @access public
	 */
	public static function url2uri($url, $keep_qs = false)
	{
		$url = trim($url);
		$uri = @parse_url($url, PHP_URL_PATH);
		$qs = @parse_url($url, PHP_URL_QUERY);

		if (!$keep_qs || !$qs) {
			return $uri;
		}

		return $uri . '?' . $qs;
	}

	/**
	 * Get attachment relative path to upload folder
	 *
	 * @since 3.0
	 * @access public
	 * @param  string 	`https://aa.com/bbb/wp-content/upload/2018/08/test.jpg` or `/bbb/wp-content/upload/2018/08/test.jpg`
	 * @return string 	`2018/08/test.jpg`
	 */
	public static function att_short_path($url)
	{
		if (!defined('LITESPEED_UPLOAD_PATH')) {
			$_wp_upload_dir = wp_upload_dir();

			$upload_path = self::url2uri($_wp_upload_dir['baseurl']);

			define('LITESPEED_UPLOAD_PATH', $upload_path);
		}

		$local_file = self::url2uri($url);

		$short_path = substr($local_file, strlen(LITESPEED_UPLOAD_PATH) + 1);

		return $short_path;
	}

	/**
	 * Make URL to be relative
	 *
	 * NOTE: for subfolder home_url, will keep subfolder part (strip nothing but scheme and host)
	 *
	 * @param  string $url
	 * @return string      Relative URL, start with /
	 */
	public static function make_relative($url)
	{
		// replace home_url if the url is full url
		self::domain_const();
		if (strpos($url, LSCWP_DOMAIN) === 0) {
			$url = substr($url, strlen(LSCWP_DOMAIN));
		}
		return trim($url);
	}

	/**
	 * Convert URL to domain only
	 *
	 * @since  1.7.1
	 */
	public static function parse_domain($url)
	{
		$url = @parse_url($url);
		if (empty($url['host'])) {
			return '';
		}

		if (!empty($url['scheme'])) {
			return $url['scheme'] . '://' . $url['host'];
		}

		return '//' . $url['host'];
	}

	/**
	 * Drop protocol `https:` from https://example.com
	 *
	 * @since  3.3
	 */
	public static function noprotocol($url)
	{
		$tmp = parse_url(trim($url));
		if (!empty($tmp['scheme'])) {
			$url = str_replace($tmp['scheme'] . ':', '', $url);
		}

		return $url;
	}

	/**
	 * Validate ip v4
	 * @since 5.5
	 */
	public static function valid_ipv4($ip)
	{
		return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE);
	}

	/**
	 * Generate domain const
	 *
	 * This will generate http://www.example.com even there is a subfolder in home_url setting
	 *
	 * Conf LSCWP_DOMAIN has NO trailing /
	 *
	 * @since  1.3
	 * @access public
	 */
	public static function domain_const()
	{
		if (defined('LSCWP_DOMAIN')) {
			return;
		}

		self::compatibility();
		$domain = http_build_url(get_home_url(), array(), HTTP_URL_STRIP_ALL);

		define('LSCWP_DOMAIN', $domain);
	}

	/**
	 * Array map one textarea to sanitize the url
	 *
	 * @since  1.3
	 * @access public
	 * @param  string $content
	 * @param  bool $type String handler type
	 * @return string|array
	 */
	public static function sanitize_lines($arr, $type = null)
	{
		$types = $type ? explode(',', $type) : array();

		if (!$arr) {
			if ($type === 'string') {
				return '';
			}
			return array();
		}

		if (!is_array($arr)) {
			$arr = explode("\n", $arr);
		}

		$arr = array_map('trim', $arr);
		$changed = false;
		if (in_array('uri', $types)) {
			$arr = array_map(__CLASS__ . '::url2uri', $arr);
			$changed = true;
		}
		if (in_array('basename', $types)) {
			$arr = array_map(__CLASS__ . '::basename', $arr);
			$changed = true;
		}
		if (in_array('drop_webp', $types)) {
			$arr = array_map(__CLASS__ . '::drop_webp', $arr);
			$changed = true;
		}
		if (in_array('relative', $types)) {
			$arr = array_map(__CLASS__ . '::make_relative', $arr); // Remove domain
			$changed = true;
		}
		if (in_array('domain', $types)) {
			$arr = array_map(__CLASS__ . '::parse_domain', $arr); // Only keep domain
			$changed = true;
		}

		if (in_array('noprotocol', $types)) {
			$arr = array_map(__CLASS__ . '::noprotocol', $arr); // Drop protocol, `https://example.com` -> `//example.com`
			$changed = true;
		}

		if (in_array('trailingslash', $types)) {
			$arr = array_map('trailingslashit', $arr); // Append trailing slash, `https://example.com` -> `https://example.com/`
			$changed = true;
		}

		if ($changed) {
			$arr = array_map('trim', $arr);
		}
		$arr = array_unique($arr);
		$arr = array_filter($arr);

		if (in_array('string', $types)) {
			return implode("\n", $arr);
		}

		return $arr;
	}

	/**
	 * Builds an url with an action and a nonce.
	 *
	 * Assumes user capabilities are already checked.
	 *
	 * @since  1.6 Changed order of 2nd&3rd param, changed 3rd param `append_str` to 2nd `type`
	 * @access public
	 * @return string The built url.
	 */
	public static function build_url($action, $type = false, $is_ajax = false, $page = null, $append_arr = array())
	{
		$prefix = '?';

		if ($page === '_ori') {
			$page = true;
			$append_arr['_litespeed_ori'] = 1;
		}

		if (!$is_ajax) {
			if ($page) {
				// If use admin url
				if ($page === true) {
					$page = 'admin.php';
				} else {
					if (strpos($page, '?') !== false) {
						$prefix = '&';
					}
				}
				$combined = $page . $prefix . Router::ACTION . '=' . $action;
			} else {
				// Current page rebuild URL
				$params = $_GET;

				if (!empty($params)) {
					if (isset($params[Router::ACTION])) {
						unset($params[Router::ACTION]);
					}
					if (isset($params['_wpnonce'])) {
						unset($params['_wpnonce']);
					}
					if (!empty($params)) {
						$prefix .= http_build_query($params) . '&';
					}
				}
				global $pagenow;
				$combined = $pagenow . $prefix . Router::ACTION . '=' . $action;
			}
		} else {
			$combined = 'admin-ajax.php?action=litespeed_ajax&' . Router::ACTION . '=' . $action;
		}

		if (is_network_admin()) {
			$prenonce = network_admin_url($combined);
		} else {
			$prenonce = admin_url($combined);
		}
		$url = wp_nonce_url($prenonce, $action, Router::NONCE);

		if ($type) {
			// Remove potential param `type` from url
			$url = parse_url(htmlspecialchars_decode($url));
			parse_str($url['query'], $query);

			$built_arr = array_merge($query, array(Router::TYPE => $type));
			if ($append_arr) {
				$built_arr = array_merge($built_arr, $append_arr);
			}
			$url['query'] = http_build_query($built_arr);
			self::compatibility();
			$url = http_build_url($url);
			$url = htmlspecialchars($url, ENT_QUOTES, 'UTF-8');
		}

		return $url;
	}

	/**
	 * Check if the host is the internal host
	 *
	 * @since  1.2.3
	 *
	 */
	public static function internal($host)
	{
		if (!defined('LITESPEED_FRONTEND_HOST')) {
			if (defined('WP_HOME')) {
				$home_host = WP_HOME; // Also think of `WP_SITEURL`
			} else {
				$home_host = get_option('home');
			}
			define('LITESPEED_FRONTEND_HOST', parse_url($home_host, PHP_URL_HOST));
		}

		if ($host === LITESPEED_FRONTEND_HOST) {
			return true;
		}

		/**
		 * Filter for multiple domains
		 * @since 2.9.4
		 */
		if (!isset(self::$_internal_domains)) {
			self::$_internal_domains = apply_filters('litespeed_internal_domains', array());
		}

		if (self::$_internal_domains) {
			return in_array($host, self::$_internal_domains);
		}

		return false;
	}

	/**
	 * Check if an URL is a internal existing file
	 *
	 * @since  1.2.2
	 * @since  1.6.2 Moved here from optm.cls due to usage of media.cls
	 * @access public
	 * @return string|bool The real path of file OR false
	 */
	public static function is_internal_file($url, $addition_postfix = false)
	{
		if (substr($url, 0, 5) == 'data:') {
			Debug2::debug2('[Util] data: content not file');
			return false;
		}
		$url_parsed = parse_url($url);
		if (isset($url_parsed['host']) && !self::internal($url_parsed['host'])) {
			// Check if is cdn path
			// Do this to avoid user hardcoded src in tpl
			if (!CDN::internal($url_parsed['host'])) {
				Debug2::debug2('[Util] external');
				return false;
			}
		}

		if (empty($url_parsed['path'])) {
			return false;
		}

		// Need to replace child blog path for assets, ref: .htaccess
		if (is_multisite() && defined('PATH_CURRENT_SITE')) {
			$pattern = '#^' . PATH_CURRENT_SITE . '([_0-9a-zA-Z-]+/)(wp-(content|admin|includes))#U';
			$replacement = PATH_CURRENT_SITE . '$2';
			$url_parsed['path'] = preg_replace($pattern, $replacement, $url_parsed['path']);
			// $current_blog = (int) get_current_blog_id();
			// $main_blog_id = (int) get_network()->site_id;
			// if ( $current_blog === $main_blog_id ) {
			// 	define( 'LITESPEED_IS_MAIN_BLOG', true );
			// }
			// else {
			// 	define( 'LITESPEED_IS_MAIN_BLOG', false );
			// }
		}

		// Parse file path
		/**
		 * Trying to fix pure /.htaccess rewrite to /wordpress case
		 *
		 * Add `define( 'LITESPEED_WP_REALPATH', '/wordpress' );` in wp-config.php in this case
		 *
		 * @internal #611001 - Combine & Minify not working?
		 * @since  1.6.3
		 */
		if (substr($url_parsed['path'], 0, 1) === '/') {
			if (defined('LITESPEED_WP_REALPATH')) {
				$file_path_ori = $_SERVER['DOCUMENT_ROOT'] . LITESPEED_WP_REALPATH . $url_parsed['path'];
			} else {
				$file_path_ori = $_SERVER['DOCUMENT_ROOT'] . $url_parsed['path'];
			}
		} else {
			$file_path_ori = Router::frontend_path() . '/' . $url_parsed['path'];
		}

		/**
		 * Added new file postfix to be check if passed in
		 * @since 2.2.4
		 */
		if ($addition_postfix) {
			$file_path_ori .= '.' . $addition_postfix;
		}

		/**
		 * Added this filter for those plugins which overwrite the filepath
		 * @see #101091 plugin `Hide My WordPress`
		 * @since 2.2.3
		 */
		$file_path_ori = apply_filters('litespeed_realpath', $file_path_ori);

		$file_path = realpath($file_path_ori);
		if (!is_file($file_path)) {
			Debug2::debug2('[Util] file not exist: ' . $file_path_ori);
			return false;
		}

		return array($file_path, filesize($file_path));
	}

	/**
	 * Safely parse URL for v5.3 compatibility
	 *
	 * @since  3.4.3
	 */
	public static function parse_url_safe($url, $component = -1)
	{
		if (substr($url, 0, 2) == '//') {
			$url = 'https:' . $url;
		}

		return parse_url($url, $component);
	}

	/**
	 * Replace url in srcset to new value
	 *
	 * @since  2.2.3
	 */
	public static function srcset_replace($content, $callback)
	{
		preg_match_all('# srcset=([\'"])(.+)\g{1}#iU', $content, $matches);
		$srcset_ori = array();
		$srcset_final = array();
		foreach ($matches[2] as $k => $urls_ori) {
			$urls_final = explode(',', $urls_ori);

			$changed = false;

			foreach ($urls_final as $k2 => $url_info) {
				$url_info_arr = explode(' ', trim($url_info));

				if (!($url2 = call_user_func($callback, $url_info_arr[0]))) {
					continue;
				}

				$changed = true;

				$urls_final[$k2] = str_replace($url_info_arr[0], $url2, $url_info);

				Debug2::debug2('[Util] - srcset replaced to ' . $url2 . (!empty($url_info_arr[1]) ? ' ' . $url_info_arr[1] : ''));
			}

			if (!$changed) {
				continue;
			}

			$urls_final = implode(',', $urls_final);

			$srcset_ori[] = $matches[0][$k];

			$srcset_final[] = str_replace($urls_ori, $urls_final, $matches[0][$k]);
		}

		if ($srcset_ori) {
			$content = str_replace($srcset_ori, $srcset_final, $content);
			Debug2::debug2('[Util] - srcset replaced');
		}

		return $content;
	}

	/**
	 * Generate pagination
	 *
	 * @since 3.0
	 * @access public
	 */
	public static function pagination($total, $limit, $return_offset = false)
	{
		$pagenum = isset($_GET['pagenum']) ? absint($_GET['pagenum']) : 1;

		$offset = ($pagenum - 1) * $limit;
		$num_of_pages = ceil($total / $limit);

		if ($offset > $total) {
			$offset = $total - $limit;
		}

		if ($offset < 0) {
			$offset = 0;
		}

		if ($return_offset) {
			return $offset;
		}

		$page_links = paginate_links(array(
			'base' => add_query_arg('pagenum', '%#%'),
			'format' => '',
			'prev_text' => '&laquo;',
			'next_text' => '&raquo;',
			'total' => $num_of_pages,
			'current' => $pagenum,
		));

		return '<div class="tablenav"><div class="tablenav-pages" style="margin: 1em 0">' . $page_links . '</div></div>';
	}

	/**
	 * Generate placeholder for an array to query
	 *
	 * @since 2.0
	 * @access public
	 */
	public static function chunk_placeholder($data, $fields)
	{
		$division = substr_count($fields, ',') + 1;

		$q = implode(
			',',
			array_map(function ($el) {
				return '(' . implode(',', $el) . ')';
			}, array_chunk(array_fill(0, count($data), '%s'), $division))
		);

		return $q;
	}
}

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