<?php

if(!function_exists('gzinflate')){
    show_tips("不支持gzinflate ,<br/>请安装php-zlib 扩展后再试");exit;
}

//扩展名权限判断 有权限则返回1 不是true
function checkExt($file){
	if($GLOBALS['isRoot']) return 1;
	if (strstr($file,'<') || strstr($file,'>') || $file=='') {
		return 0;
	}
	
	//'php|phtml|phtm|pwml|asp|aspx|ascx|jsp|pl|htaccess|shtml|shtm'
	$notAllow = strtolower($GLOBALS['auth']['extNotAllow']);
	$extArr = explode('|',$notAllow);
	if(in_array('asp',$extArr)){
		$extArr = array_merge($extArr,array('aspx','ascx','pwml'));
	}
	if(in_array('php',$extArr)){
		$extArr = array_merge($extArr,array('phtml','phtm','htaccess','pwml'));
	}
	if(in_array('htm',$extArr) || in_array('html',$extArr)){
		$extArr = array_merge($extArr,array('html','shtml','shtm','html'));
	}
	foreach ($extArr as $current) {
		if ($current !== '' && stristr($file,'.'.$current)){//含有扩展名
			return 0;
		}
	}
	return 1;
}

//-----解压缩跨平台编码转换；自动识别编码-----
//压缩前，文件名处理；
//ACT=zip——压缩到当前
//ACT=zipDownload---打包下载[判断浏览器&UA——得到地区自动转换为目标编码]；
function zip_pre_name($fileName,$toCharset=false){
	Hook::trigger('zip.nameParse',$fileName);
	if(get_path_this($fileName) == '.DS_Store') return '';//过滤文件
	if (!function_exists('iconv')){
		return $fileName;
	}
	$charset = $GLOBALS['config']['systemCharset'];
	if($toCharset == false){//默认从客户端和浏览器自动识别
		$toCharset = 'utf-8';
		$clientLanugage = I18n::defaultLang();
		$langType = I18n::getType();
		if( client_is_windows() && (
			$clientLanugage =='zh-CN' || 
			$clientLanugage =='zh-TW' || 
			$langType =='zh-CN' ||
			$langType =='zh-TW' )
		){
			$toCharset = "gbk";//压缩或者打包下载压缩时文件名采用的编码
		}
	}

	//write_log("zip:".$charset.';'.$toCharset.';'.$fileName,'zip');
	$result = iconv_to($fileName,$charset,$toCharset);
	if(!$result){
		$result = $fileName;
	}
	return $result;
}

//解压缩文件名检测
function unzip_filter_ext($name){
	$add = '.txt';
	if( checkExt($name) &&
		!stristr($name,'user.ini') &&
		!stristr($name,'.htaccess')
	){//允许
		return $name;
	}
	return $name.$add;
}
//解压到kod，文件名处理;识别编码并转换到当前系统编码
function unzip_pre_name($fileName){
	Hook::trigger('unzip.nameParse',$fileName);
	$fileName = str_replace(array('../','..\\',''),'',$fileName);
	if (!function_exists('iconv')){
		return unzip_filter_ext($fileName);
	}
	if(isset($GLOBALS['unzipFileCharsetGet'])){
		$charset = $GLOBALS['unzipFileCharsetGet'];
	}else{
		$charset = get_charset($fileName);
	}
	$toCharset = $GLOBALS['config']['systemCharset'];
	$result = iconv_to($fileName,$charset,$toCharset);
	if(!$result){
		$result = $fileName;
	}
	$result = unzip_filter_ext($result);
	//echo $charset.'==>'.$toCharset.':'.$result.'==='.$fileName.'<br/>';
	return $result;
}

// 获取压缩文件内编码
// $GLOBALS['unzipFileCharsetGet']
function unzip_charset_get($list){
	if(count($list) == 0) return 'utf-8';
	$charsetArr = array();
	for ($i=0; $i < count($list); $i++) { 
		$charset = get_charset($list[$i]['filename']);
		if(!isset($charsetArr[$charset])){
			$charsetArr[$charset] = 1;
		}else{
			$charsetArr[$charset] += 1;
		}
	}
	arsort($charsetArr);
	$keys = array_keys($charsetArr);

	if(in_array('gbk',$keys)){//含有gbk,则认为是gbk
		$keys[0] = 'gbk';
	}
	$GLOBALS['unzipFileCharsetGet'] = $keys[0];
	return $keys[0];
}

function charset_check(&$str,$check,$tempCharset='utf-8'){
	if ($str === '' || !function_exists("mb_convert_encoding")){
		return false;
	}
	$testStr1 = @mb_convert_encoding($str,$tempCharset,$check);
	$testStr2 = @mb_convert_encoding($testStr1,$check,$tempCharset);
	if($str == $testStr2){
		return true;
	}
	return false;
}

//https://segmentfault.com/a/1190000003020776
//http://blog.sina.com.cn/s/blog_b97feef301019571.html
function get_charset(&$str) {
	if($GLOBALS['config']['checkCharsetDefault']){//直接指定编码
		return $GLOBALS['config']['checkCharsetDefault'];
	}
	if ($str === '' || !function_exists("mb_detect_encoding")){
		return 'utf-8';
	}
	$bom_arr = array(
		'utf-8'		=> chr(0xEF) . chr(0xBB) .chr(0xBF),
		'utf-16le' 	=> chr(0xFF) . chr(0xFE),
		'utf-16be' 	=> chr(0xFE) . chr(0xFF),
		'utf-32le' 	=> chr(0xFF) . chr(0xFE) . chr(0x00) . chr(0x00),
		'utf-32be' 	=> chr(0x00) . chr(0x00) . chr(0xFE) . chr(0xFF),
	);
	foreach ($bom_arr as $key => $value) {
		if (substr($str,0,strlen($value)) === $value ){
			return $key;
		}
	}

	//前面检测成功则，自动忽略后面
	$charset=strtolower(@mb_detect_encoding($str,$GLOBALS['config']['checkCharset']));
	$charsetGet = $charset;
	if ($charset == 'cp936'){
		// 有交叉，部分文件无法识别
		if(charset_check($str,'ISO-8859-4') && !charset_check($str,'gbk') && !charset_check($str,'big5')){
			$charset = 'ISO-8859-4';
		}elseif(charset_check($str,'gbk') && !charset_check($str,'big5')){
			$charset = 'gbk';
		}else if(charset_check($str,'big5')){
			$charset = 'big5';
		}
	}else if ($charset == 'euc-cn'){
		$charset = 'gbk';
	}else if ($charset == 'ascii'){
		$charset = 'utf-8';
	}
	if ($charset == 'iso-8859-1'){
		//检测详细编码;value为用什么编码检测；为空则用utf-8
		$check = array(
			'utf-8'       => $charset,
			'utf-16'      => 'gbk',
			'cp1251'      => 'utf-8',
			'cp1252'      => 'utf-8'			
		);
		foreach($check as $key => $val){
			if(charset_check($str,$key,$val)){
				if($val == ''){
					$val = 'utf-8';
				}
				$charset = $key;
				break;
			}
		}
	}
	//show_json($charset,false,$charsetGet);
	return $charset;
}

/**
 * 服务器相关环境
 * 检测环境是否支持升级版本
 */
function serverInfo(){
	$lib = array(
		"sqlit3"=>intval( class_exists('SQLite3') ),
		"sqlit" =>intval( extension_loaded('sqlite') ),
		"curl"	=>intval( function_exists('curl_init') ),
		"pdo"	=>intval( class_exists('PDO') ),
		"mysqli"=>intval( extension_loaded('mysqli') ),
		"mysql"	=>intval( extension_loaded('mysql') ),
	);
	$libStr = "";
	foreach($lib as $key=>$val){
		$libStr .= $key.'='.$val.';';
	}
	$system = explode(" ", php_uname());
	$env = array(
		"sys"   => strtolower($system[0]),
		"php"	=> floatval(PHP_VERSION),
		"server"=> $_SERVER['SERVER_SOFTWARE'],
		"lib"	=> $libStr,
		"bit" 	=> PHP_INT_SIZE,
		"info"	=> php_uname().';php='.PHP_VERSION,
	);
	$result = str_replace("\/","@",json_encode($env));
	return $result;
}


/**
 * 获取可以上传的最大值
 * return * byte
 */
function get_post_max(){
	$upload = ini_get('upload_max_filesize');
	$upload = $upload==''?ini_get('upload_max_size'):$upload;
	$post = ini_get('post_max_size');
	$upload = floatval($upload)*1024*1024;
	$post = floatval($post)*1024*1024;
	$theMax = $upload<$post?$upload:$post;
	return $theMax;
}

function phpBuild64(){
	if(PHP_INT_SIZE === 8) return true;//部分版本,64位会返回4;
	ob_clean();
	ob_start();
	var_dump(12345678900);
	$res = ob_get_clean();
	if(strstr($res,'float')) return false;
	return true;
}


function check_list_dir(){
	$url  = APP_HOST.'app/core/';
	$find = "Application.class.php";
	
	@ini_set('default_socket_timeout',1);
	$context = stream_context_create(array('http'=>array('method'=>"GET",'timeout'=>1)));
	$str = @file_get_contents($url,false,$context);
	if(stripos($str,$find) === false){//not find;ok success
		return true;
	}else{
		return false;
	}
}
function php_env_check(){
	$error = '';
	if(!function_exists('iconv')) $error.= '<li>'.LNG('common.env.errorLib').' iconv</li>';
	if(!function_exists('json_encode')) $error.= '<li>'.LNG('common.env.errorLib').' json</li>';
	if(!function_exists('curl_init')) $error.= '<li>'.LNG('common.env.errorLib').' curl</li>';
	if(!function_exists('mb_convert_encoding')) $error.= '<li>'.LNG('common.env.errorLib').' mb_string</li>';
	if(!function_exists('file_get_contents')) $error.='<li>'.LNG('common.env.errorLib').' file_get_contents</li>';
	if(!version_compare(PHP_VERSION,'5.0','>=')) $error.= '<li>'.LNG('common.env.errorVersion').'</li>';
	if(!check_list_dir()) $error.='<li>'.LNG('common.env.errorListDir').'</li>';

	$parent = get_path_father(BASIC_PATH);
	$arr_check = array(
		BASIC_PATH,
		DATA_PATH,
		DATA_PATH.'system',
		DATA_PATH.'User',
		DATA_PATH.'Group',
		DATA_PATH.'session'
	);
	foreach ($arr_check as $value) {
		if(!path_writeable($value)){
			$error.= '<li>'.str_replace($parent,'',$value).'/	'.LNG('common.env.errorPath').'</li>';
		}
	}
	if( !function_exists('imagecreatefromjpeg')||
		!function_exists('imagecreatefromgif')||
		!function_exists('imagecreatefrompng')||
		!function_exists('imagecolorallocate')){
		$error.= '<li>'.LNG('common.env.errorGd').'</li>';
	}
	return $error;
}

function check_enviroment(){
	I18n::load();
	checkPhp();
	check_version_cache();
}

//提前判断版本是否一致；
function check_version_cache(){
	//检查是否更新失效
	$content = file_get_contents(BASIC_PATH.'config/version.php');
	$result  = match($content,"'KOD_VERSION','(.*)'");
	if($result != KOD_VERSION){
		$ver = KOD_VERSION.'==>'.$result;
		show_tips(LNG('common.env.phpCacheOpenTips')."<br/>".$ver);
	}
}
function checkPhp(){
	$version = phpversion();
	if(floatval($version) <  5.3){
		$msg = "<b>php版本不支持:</b> php >= 5.3;<br/><b>当前版本:</b> php version(".$version.');';
		show_tips($msg);exit;
	}
}

function init_common(){
	$GLOBALS['in'] = parse_incoming();
	$file = LIB_DIR.'update.php';
	if(!file_exists($file)) return;
	
	//覆盖安装文件删除不了重定向问题优化
	$errorTips = LNG('common.env.pathPermissionError') .BASIC_PATH.'</pre>';
	if(!is_writable($file) ) show_tips($errorTips,false);
	include($file);
	del_file($file);
}

//登录是否需要验证码
function need_check_code(){
	if( !Model('SystemOption')->get('needCheckCode') || 
		!function_exists('imagecreatefromjpeg')||
		!function_exists('imagecreatefromgif')||
		!function_exists('imagecreatefrompng')||
		!function_exists('imagecolorallocate')
		){
		return false;
	}else{
		return true;
	}
}

function hash_encode($str) {
	return str_replace(array('+','/','='),array('_a','_b','_c'),base64_encode($str));
}
function hash_decode($str) {
	return base64_decode(str_replace(array('_a','_b','_c'),array('+','/','='),$str));
}

// 目录hash;
function hash_path($path,$addExt=false){
	$password = Model('SystemOption')->get('systemPassword');
	if(!$password){
		$password = 'kodcloud';
	}

	$pre = substr(md5($path.$password),0,8);
	$result = $pre.md5($path);
	if(file_exists($path)){
		$result = $pre.md5($path.filemtime($path));
		if(filesize($path) < 50*1024*1024){
			$fileMd5 = @md5_file($path);
			if($fileMd5){
				$result = $fileMd5;
			}
		}
	}
	if($addExt){
		$result = $result.'.'.get_path_ext($path);
	}
	return $result;
}
