<?php

namespace wework;

use wework\exception\ParameterError;

class Utils
{

 public static function notEmptyStr($var)
 {
 return is_string($var) && ($var != "");
 }

 public static function checkNotEmptyStr($var, $name)
 {
 if (!self::notEmptyStr($var)) {
 throw new ParameterError($name." can not be empty string");
 }
 }

 public static function checkIsUInt($var, $name)
 {
 if (!(is_int($var) && $var >= 0)) {
 throw new ParameterError($name." need unsigned int");
 }
 }

 public static function checkNotEmptyArray($var, $name)
 {
 if (!is_array($var) || count($var) == 0) {
 throw new ParameterError($name." can not be empty array");
 }
 }

 public static function setIfNotNull($var, $name, &$args)
 {
 if (!is_null($var)) {
 $args[$name] = $var;
 }
 }

 public static function arrayGet($array, $key, $default = null)
 {
 if (array_key_exists($key, $array)) {
 return $array[$key];
 }
 return $default;
 }

 /**
 * 数组 转 对象
 *
 * @param array $arr 数组
 * @return mixed|void
 */
 public static function Array2Object($arr)
 {
 if (gettype($arr) != 'array') {
 return;
 }
 foreach ($arr as $k => $v) {
 if (gettype($v) == 'array' || getType($v) == 'object') {
 $arr[$k] = (object) self::Array2Object($v);
 }
 }

 return (object) $arr;
 }

 /**
 * 对象 转 数组
 *
 * @param object $obj 对象
 * @return array
 */
 public static function Object2Array($object)
 {
 if (is_object($object) || is_array($object)) {
 $array = array();
 foreach ($object as $key => $value) {
 if ($value == null) {
 continue;
 }
 $array[$key] = self::Object2Array($value);
 }
 return $array;
 } else {
 return $object;
 }
 }

 //数组转XML
 public static function Array2Xml($rootName, $arr)
 {
 $xml = "<".$rootName.">";
 foreach ($arr as $key => $val) {
 if (is_numeric($val)) {
 $xml .= "<".$key.">".$val."</".$key.">";
 } else {
 $xml .= "<".$key."><![CDATA[".$val."]]></".$key.">";
 }
 }
 $xml .= "</".$rootName.">";
 return $xml;
 }

 //将XML转为array
 public static function Xml2Array($xml)
 {
 //禁止引用外部xml实体
 libxml_disable_entity_loader(true);
 $values = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
 return $values;
 }

} // class Utils