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<?php

/*
 * Copyright 2004-2014, AfterLogic Corp.
 * Licensed under AGPLv3 license or AfterLogic license
 * if commercial version of the product was purchased.
 * See the LICENSE file for a full license statement.
 */

/**
 * @package Api
 */
class api_Utils
{
	/**
	* @var array
	*/
	static $aSuppostedCharsets = array(
		'iso-8859-1', 'iso-8859-2', 'iso-8859-3', 'iso-8859-4', 'iso-8859-5', 'iso-8859-6',
		'iso-8859-7', 'iso-8859-8', 'iso-8859-9', 'iso-8859-10', 'iso-8859-11', 'iso-8859-12',
		'iso-8859-13', 'iso-8859-14', 'iso-8859-15', 'iso-8859-16',
		'koi8-r', 'koi8-u', 'koi8-ru',
		'cp1250', 'cp1251', 'cp1252', 'cp1253', 'cp1254', 'cp1257', 'cp949', 'cp1133',
		'cp850', 'cp866', 'cp1255', 'cp1256', 'cp862', 'cp874', 'cp932', 'cp950', 'cp1258',
		'windows-1250', 'windows-1251', 'windows-1252', 'windows-1253', 'windows-1254', 'windows-1255',
		'windows-1256', 'windows-1257', 'windows-1258', 'windows-874',
		'macroman', 'maccentraleurope', 'maciceland', 'maccroatian', 'macromania', 'maccyrillic',
		'macukraine', 'macgreek', 'macturkish', 'macintosh', 'machebrew', 'macarabic',
		'euc-jp', 'shift_jis', 'iso-2022-jp', 'iso-2022-jp-2', 'iso-2022-jp-1',
		'euc-cn', 'gb2312', 'hz', 'gbk', 'gb18030', 'euc-tw', 'big5', 'big5-hkscs',
		'iso-2022-cn', 'iso-2022-cn-ext', 'euc-kr', 'iso-2022-kr', 'johab',
		'armscii-8', 'georgian-academy', 'georgian-ps', 'koi8-t',
		'tis-620', 'macthai', 'mulelao-1',
		'viscii', 'tcvn', 'hp-roman8', 'nextstep',
		'utf-8', 'ucs-2', 'ucs-2be', 'ucs-2le', 'ucs-4', 'ucs-4be', 'ucs-4le',
		'utf-16', 'utf-16be', 'utf-16le', 'utf-32', 'utf-32be', 'utf-32le', 'utf-7',
		'c99', 'java', 'ucs-2-internal', 'ucs-4-internal');

	/**
	* @var string
	*/
	static $sTimeZone = null;

	/**
	 * @return float
	 */
	public static function Microtime()
	{
		return microtime(true);
	}

	/**
	 * @param array $aArray
	 * @param string $sKey
	 * @param mixed $mDefault
	 * @return mixed
	 */
	public static function ArrayValue($aArray, $sKey, $mDefault)
	{
		return (isset($aArray[$sKey])) ? $aArray[$sKey] : $mDefault;
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function EncodeSpecialXmlChars($sValue)
	{
		return str_replace('>', '&gt;', str_replace('<', '&lt;', str_replace('&', '&amp;', $sValue)));
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function DecodeSpecialXmlChars($sValue)
	{
		return str_replace('&amp;', '&', str_replace('&lt;', '<', str_replace('&gt;', '>', $sValue)));
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function EncodeSimpleSpecialXmlChars($sValue)
	{
		return str_replace(']]>','&#93;&#93;&gt;', $sValue);
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function DecodeSimpleSpecialXmlChars($sValue)
	{
		return str_replace('&#93;&#93;&gt;', ']]>', $sValue);
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function ShowCRLF($sValue)
	{
		return str_replace(array("\r", "\n", "\t"), array('\r', '\n', '\t'), $sValue);
	}

	/**
	 * @param string $sPath
	 * @param string $sPrefix = null
	 * @return string
	 */
	public static function GetFullPath($sPath, $sPrefix = null)
	{
		if ($sPrefix !== null && !self::IsFullPath($sPath))
		{
			$sPath = rtrim($sPrefix, '\\/').'/'.trim($sPath, '\\/');
		}

		if (@is_dir($sPath))
		{
			$sPath = rtrim(str_replace('\\', '/', realpath($sPath)), '/');
		}

		return $sPath;
	}

	/**
	 * @param string $sPpath
	 * @return bool
	 */
	public static function IsFullPath($sPpath)
	{
		if (strlen($sPpath) > 0)
		{
			return (($sPpath{0} == '/' || $sPpath{0} == '\\') || (strlen($sPpath) > 1 && self::IsWin() && $sPpath{1} == ':'));
		}
		return false;
	}

	/**
	 * @return bool
	 */
	public static function IsWin()
	{
		return (defined('PHP_OS') && 'WIN' === strtoupper(substr(PHP_OS, 0, 3)));
	}

	/**
	 * @param array $aArray
	 * @param string $sType
	 * @return array
	 */
	public static function SetTypeArrayValue($aArray, $sType)
	{
		$aResult = array();
		foreach ($aArray as $mValue)
		{
			settype($mValue, $sType);
			$aResult[] = $mValue;
		}
		return $aResult;
	}

	/**
	 * @param string $sPrefix
	 * @return string
	 */
	public static function ClearPrefix($sPrefix)
	{
		$sNewPrefix = preg_replace('/[^a-z0-9_]/i', '_', $sPrefix);
		if ($sNewPrefix !== $sPrefix)
		{
			$sNewPrefix = preg_replace('/[_]+/', '_', $sNewPrefix);
		}
		return $sNewPrefix;
	}

	/**
	 * @param string $sEncoding
	 * @return string
	 */
	protected static function iconvNormalizeCharset($sEncoding)
	{
		$sEncoding = strtolower($sEncoding);
		switch ($sEncoding)
		{
			case 'ansi':
			case 'ansii':
			case 'us-ansii':
				$sEncoding = 'iso-8859-1';
				break;
			case 'utf8':
			case 'utf-8':
				$sEncoding = 'utf-8';
				break;
			case 'utf7-imap':
			case 'utf7imap':
			case 'utf-7imap':
			case 'utf-7-imap':
				$sEncoding = 'utf7-imap';
				break;
			case 'ks-c-5601-1987':
			case 'ks_c_5601-1987':
				$sEncoding = 'euc-kr';
				break;
			case 'x-gbk':
				$sEncoding = 'gb2312';
				break;
			case 'iso-8859-i':
			case 'iso-8859-8-i':
				$sEncoding = 'iso-8859-8';
				break;
		}

		return $sEncoding;
	}

	/**
	 * @param string $sString
	 * @param string $sFromEncoding
	 * @param string $sToEncoding
	 * @return string
	 */
	public static function ConvertEncoding($sString, $sFromEncoding, $sToEncoding)
	{
		$sResult = $sString;
		$sFromEncoding = self::iconvNormalizeCharset($sFromEncoding);
		$sToEncoding = self::iconvNormalizeCharset($sToEncoding);

		if ('' === trim($sResult) || $sFromEncoding === $sToEncoding)
		{
			return $sResult;
		}

		switch (true)
		{
			default:
				break;
			case ($sFromEncoding === 'iso-8859-1' && $sToEncoding === 'utf-8' && function_exists('utf8_encode')):
				$sResult = utf8_encode($sResult);
				break;
			case ($sFromEncoding === 'utf-8' && $sToEncoding === 'iso-8859-1' && function_exists('utf8_decode'));
				$sResult = utf8_decode($sResult);
				break;
			case ($sFromEncoding === 'utf7-imap' && $sToEncoding === 'utf-8'):
				$sResult = self::Utf7ModifiedToUtf8($sResult);
				if (false === $sResult)
				{
					$sResult = $sString;
				}
				break;
			case ($sFromEncoding === 'utf-8' && $sToEncoding === 'utf7-imap'):
				$sResult = self::Utf8ToUtf7Modified($sResult);
				if (false === $sResult)
				{
					$sResult = $sString;
				}
				break;
			case (in_array(strtolower($sFromEncoding), self::$aSuppostedCharsets)):
				$sResult = @iconv($sFromEncoding, $sToEncoding.'//IGNORE', $sResult);
				if (false === $sResult)
				{
					CApi::Log('iconv FALSE result ["'.$sFromEncoding.'", "'.$sToEncoding.'//IGNORE", "'.substr($sString, 0, 20).' / cut"]', ELogLevel::Error);
					$sResult = $sString;
				}
				break;
		}

		return $sResult;
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function UrlSafeBase64Encode($sValue)
	{
		return str_replace(array('+', '/', '='), array('-', '_', '.'), base64_encode($sValue));
	}

	/**
	 * @param string $sValue
	 * @return string
	 */
	public static function UrlSafeBase64Decode($sValue)
	{
		$sData = str_replace(array('-', '_', '.'), array('+', '/', '='), $sValue);
		$sMode = strlen($sData) % 4;
		if ($sMode)
		{
			$sData .= substr('====', $sMode);
		}

		return base64_decode($sData);
	}

	/**
	 * @param string $sStr
	 * @return bool
	 */
	public static function IsUtf7($sStr)
	{
		$iAmp = strpos($sStr, '&');
		return (false !== $iAmp && false !== strpos($sStr, '-', $iAmp));
	}

	/**
	 * @param string $str
	 * @return string
	 */
	public static function Utf7ModifiedToUtf8($str)
	{
		$array = array(-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62, 63,-1,-1,-1,52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1);

		$result = '';
		$error = false;
		$strlen = strlen($str);

		for ($i = 0; $strlen > 0; $i++, $strlen--)
		{
			$char = $str{$i};
			if ($char == '&')
			{
				$i++;
				$strlen--;

				$char = isset($str{$i}) ? $str{$i} : null;
				if ($char === null)
				{
					break;
				}

				if ($strlen && $char == '-')
				{
					$result .= '&';
					continue;
				}

				$ch = 0;
				$k = 10;
				for (; $strlen > 0; $i++, $strlen--)
				{
					$char = $str{$i};

					$b = $array[ord($char)];
					if ((ord($char) & 0x80) || $b == -1)
					{
						break;
					}

					if ($k > 0)
					{
						$ch |= $b << $k;
						$k -= 6;
					}
					else
					{
						$ch |= $b >> (-$k);
						if ($ch < 0x80)
						{
							if (0x20 <= $ch && $ch < 0x7f)
							{
								return $error;
							}

							$result .= chr($ch);
						}
						else if ($ch < 0x800)
						{
							$result .= chr(0xc0 | ($ch >> 6));
							$result .= chr(0x80 | ($ch & 0x3f));
						}
						else
						{
							$result .= chr(0xe0 | ($ch >> 12));
							$result .= chr(0x80 | (($ch >> 6) & 0x3f));
							$result .= chr(0x80 | ($ch & 0x3f));
						}

						$ch = ($b << (16 + $k)) & 0xffff;
						$k += 10;
					}
				}

				if (($ch || $k < 6) ||
					(!$strlen || $char != '-') ||
					($strlen > 2 && '&' === $str{$i+1} && '-' !==  $str{$i+2}))
				{
					return $error;
				}
			}
			else if (ord($char) < 0x20 || ord($char) >= 0x7f)
			{
				return $error;
			}
			else
			{
				$result .= $char;
			}
		}

		return $result;
	}

	/**
	 * @param string $str
	 * @return string
	 */
	public static function Utf8ToUtf7Modified($str)
	{
		$array = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+',',');

		$strlen = strlen($str);
		$isB = false;
		$i = $n = 0;
		$return = '';
		$error = false;
		$ch = $b = $k = 0;

		while ($strlen)
		{
			$c = ord($str{$i});
			if ($c < 0x80)
			{
				$ch = $c;
				$n = 0;
			}
			else if ($c < 0xc2)
			{
				return $error;
			}
			else if ($c < 0xe0)
			{
				$ch = $c & 0x1f;
				$n = 1;
			}
			else if ($c < 0xf0)
			{
				$ch = $c & 0x0f;
				$n = 2;
			}
			else if ($c < 0xf8)
			{
				$ch = $c & 0x07;
				$n = 3;
			}
			else if ($c < 0xfc)
			{
				$ch = $c & 0x03;
				$n = 4;
			}
			else if ($c < 0xfe)
			{
				$ch = $c & 0x01;
				$n = 5;
			}
			else
			{
				return $error;
			}

			$i++;
			$strlen--;

			if ($n > $strlen)
			{
				return $error;
			}

			for ($j=0; $j < $n; $j++)
			{
				$o = ord($str{$i+$j});
				if (($o & 0xc0) != 0x80)
				{
					return $error;
				}

				$ch = ($ch << 6) | ($o & 0x3f);
			}

			if ($n > 1 && !($ch >> ($n * 5 + 1)))
			{
				return $error;
			}

			$i += $n;
			$strlen -= $n;

			if ($ch < 0x20 || $ch >= 0x7f)
			{
				if (!$isB)
				{
					$return .= '&';
					$isB = true;
					$b = 0;
					$k = 10;
				}

				if ($ch & ~0xffff)
				{
					$ch = 0xfffe;
				}

				$return .= $array[($b | $ch >> $k)];
				$k -= 6;
				for (; $k >= 0; $k -= 6)
				{
					$return .= $array[(($ch >> $k) & 0x3f)];
				}

				$b = ($ch << (-$k)) & 0x3f;
				$k += 16;
			}
			else
			{
				if ($isB)
				{
					if ($k > 10)
					{
						$return .= $array[$b];
					}
					$return .= '-';
					$isB = false;
				}

				$return .= chr($ch);
				if ('&' === chr($ch))
				{
					$return .= '-';
				}
			}
		}

		if ($isB)
		{
			if ($k > 10)
			{
				$return .= $array[$b];
			}

			$return .= '-';
		}

		return $return;
	}

	/**
	 * @param string $sPassword
	 * @return string
	 */
	public static function EncodePassword($sPassword)
	{
		if (empty($sPassword))
		{
			return '';
		}

		$sPlainBytes = $sPassword;
		$sEncodeByte = $sPlainBytes{0};
		$sResult = bin2hex($sEncodeByte);

		for ($iIndex = 1, $iLen = strlen($sPlainBytes); $iIndex < $iLen; $iIndex++)
		{
			$sPlainBytes{$iIndex} = ($sPlainBytes{$iIndex} ^ $sEncodeByte);
			$sResult .= bin2hex($sPlainBytes{$iIndex});
		}

		return $sResult;
	}

	/**
	 * @param string $sPassword
	 * @return string
	 */
	public static function DecodePassword($sPassword)
	{
		$sResult = '';
		$iPasswordLen = strlen($sPassword);

		if (0 < $iPasswordLen && strlen($sPassword) % 2 == 0)
		{
			$sDecodeByte = chr(hexdec(substr($sPassword, 0, 2)));
			$sPlainBytes = $sDecodeByte;
			$iStartIndex = 2;
			$iCurrentByte = 1;

			do
			{
				$sHexByte = substr($sPassword, $iStartIndex, 2);
				$sPlainBytes .= (chr(hexdec($sHexByte)) ^ $sDecodeByte);

				$iStartIndex += 2;
				$iCurrentByte++;
			}
			while ($iStartIndex < $iPasswordLen);

			$sResult = $sPlainBytes;
		}
		return $sResult;
	}

	/**
	 * @param string $sEmail
	 * @return string
	 */
	public static function GetAccountNameFromEmail($sEmail)
	{
		$sResult = '';
		if (!empty($sEmail))
		{
			$iPos = strpos($sEmail, '@');
			$sResult = (false === $iPos) ? $sEmail : substr($sEmail, 0, $iPos);
		}

		return $sResult;
	}

	/**
	 * @param string $sEmail
	 * @return string
	 */
	public static function GetDomainFromEmail($sEmail)
	{
		$sResult = '';
		if (!empty($sEmail))
		{
			$iPos = strpos($sEmail, '@');
			if (false !== $iPos)
			{
				$sResult = substr($sEmail, $iPos + 1);
			}
		}
		return $sResult;
	}

	/**
	 * @param string $iSizeInBytes
	 * @return string
	 */
	public static function GetFriendlySize($iSizeInBytes)
	{
		$iSizeInKB = ceil($iSizeInBytes / 1024);
		$iSizeInMB = $iSizeInKB / 1024;
		if ($iSizeInMB >= 100)
		{
			$iSizeInKB = ceil($iSizeInMB * 10 / 10).'MB';
		}
		else if ($iSizeInMB > 1)
		{
			$iSizeInKB = (ceil($iSizeInMB * 10) / 10).'MB';
		}
		else
		{
			$iSizeInKB = $iSizeInKB.'KB';
		}

		return $iSizeInKB;
	}

	/**
	 * @param string $iSizeInBytes
	 * @return string
	 */
	public static function GetFriendlySizeSpec($iSizeInBytes)
	{
		$size = ceil($iSizeInBytes / 1024);
		$mbSize = $size / 1024;
		return ($mbSize > 1)
			? (($mbSize >= 1024)
				? (ceil(($mbSize * 10) / 1024) / 10).'GB'
				: (ceil($mbSize * 10) / 10).'MB')
			: $size.'KB';
	}

	/**
	 * @staticvar array $aMapping
	 * @param int $iCodePage
	 * @return string
	 */
	public static function GetCodePageName($iCodePage)
	{
		static $aMapping = array(
			0 => 'default',
			51936 => 'euc-cn',
			936 => 'gb2312',
			950 => 'big5',
			946 => 'euc-kr',
			50225 => 'iso-2022-kr',
			50220 => 'iso-2022-jp',
			932 => 'shift-jis',
			65000 => 'utf-7',
			65001 => 'utf-8',
			1250 => 'windows-1250',
			1251 => 'windows-1251',
			1252 => 'windows-1252',
			1253 => 'windows-1253',
			1254 => 'windows-1254',
			1255 => 'windows-1255',
			1256 => 'windows-1256',
			1257 => 'windows-1257',
			1258 => 'windows-1258',
			20866 => 'koi8-r',
			28591 => 'iso-8859-1',
			28592 => 'iso-8859-2',
			28593 => 'iso-8859-3',
			28594 => 'iso-8859-4',
			28595 => 'iso-8859-5',
			28596 => 'iso-8859-6',
			28597 => 'iso-8859-7',
			28598 => 'iso-8859-8'
		);

		return (isset($aMapping[$iCodePage])) ? $aMapping[$iCodePage] : '';
	}

	/**
	 * @staticvar array $aMapping
	 * @param string $sCodePageName
	 * @return int
	 */
	public static function GetCodePageNumber($sCodePageName)
	{
		static $aMapping = array(
			'default' => 0,
			'euc-cn' => 51936,
			'gb2312' => 936,
			'big5' => 950,
			'euc-kr' => 949,
			'iso-2022-kr' => 50225,
			'iso-2022-jp' => 50220,
			'shift-jis' => 932,
			'utf-7' => 65000,
			'utf-8' => 65001,
			'windows-1250' => 1250,
			'windows-1251' => 1251,
			'windows-1252' => 1252,
			'windows-1253' => 1253,
			'windows-1254' => 1254,
			'windows-1255' => 1255,
			'windows-1256' => 1256,
			'windows-1257' => 1257,
			'windows-1258' => 1258,
			'koi8-r' => 20866,
			'iso-8859-1' => 28591,
			'iso-8859-2' => 28592,
			'iso-8859-3' => 28593,
			'iso-8859-4' => 28594,
			'iso-8859-5' => 28595,
			'iso-8859-6' => 28596,
			'iso-8859-7' => 28597,
			'iso-8859-8' => 28598
		);

		return (isset($aMapping[$sCodePageName])) ? $aMapping[$sCodePageName] : 0;
	}

	/**
	 * @param string $sDateTime
	 * @return array | bool
	 */
	public static function DateParse($sDateTime)
	{
		if (function_exists('date_parse'))
		{
			return date_parse($sDateTime);
		}

		$mReturn = false;
		$aDateTime = explode(' ', $sDateTime, 2);
		if (count($aDateTime) == 2)
		{
			$aDate = explode('-', trim($aDateTime[0]), 3);
			$aTime = explode(':', trim($aDateTime[1]), 3);

			if (3 === count($aDate) && 3 === count($aTime))
			{
				$mReturn = array(
					'year' => $aDate[0],
					'day' => $aDate[2],
					'month' => $aDate[1],

					'hour' => $aTime[0],
					'minute' => $aTime[1],
					'second' => $aTime[2]
				);
			}
		}
		return $mReturn;
	}

	/**
	 * @param string $sTimeOffset
	 * @return int
	 */
	static public function GetTimeOffsetFromHoursString($sTimeOffset)
	{
		$iResult = 0;
		$sTimeOffset = trim($sTimeOffset);
		if (0 < strlen($sTimeOffset))
		{
			$sSign = $sTimeOffset{0};
			$sTimeOffset = substr($sTimeOffset, 1);
			$nOffset = (is_numeric($sTimeOffset)) ? (int) $sTimeOffset : 0;

			$iHours = $nOffset / 100;
			$iMinutes = $nOffset % 100;

			$iMultiplier = ('-' === $sSign) ? -1 : 1;

			$iResult += $iMultiplier * $iHours * 60 * 60;
			$iResult += $iMultiplier * $iMinutes * 60;
		}

		return $iResult;
	}

	/**
	 * @param int $iDefaultTimeZone
	 * @param string $sClientTimeZone = ''
	 * @return short
	 */
	public static function GetTimeOffset($iDefaultTimeZone, $sClientTimeZone = '')
	{
		if ('' !== $sClientTimeZone)
		{
			try {

				$oDateTimeZone = new DateTimeZone($sClientTimeZone);
				return $oDateTimeZone->getOffset(new DateTime('now')) / 60;
			}
			catch (Exception $oE)
			{
				CApi::Log($sClientTimeZone);
				CApi::LogObject($oE, ELogLevel::Warning);
			}
		}

		$iTimeOffset = 0;
		switch ($iDefaultTimeZone)
		{
			default:
			case 0:
				break;
			case 1:
				$iTimeOffset = -12 * 60;
				break;
			case 2:
				$iTimeOffset = -11 * 60;
				break;
			case 3:
				$iTimeOffset = -10 * 60;
				break;
			case 4:
				$iTimeOffset = -9 * 60;
				break;
			case 5:
				$iTimeOffset =  -8*60;
				break;
			case 6:
			case 7:
				$iTimeOffset = -7 * 60;
				break;
			case 8:
			case 9:
			case 10:
			case 11:
				$iTimeOffset = -6 * 60;
				break;
			case 12:
			case 13:
			case 14:
				$iTimeOffset = -5 * 60;
				break;
			case 15:
			case 16:
			case 17:
				$iTimeOffset = -4 * 60;
				break;
			case 18:
				$iTimeOffset = -3.5 * 60;
				break;
			case 19:
			case 20:
			case 21:
				$iTimeOffset = -3 * 60;
				break;
			case 22:
				$iTimeOffset = -2 * 60;
				break;
			case 23:
			case 24:
				$iTimeOffset = -60;
				break;
			case 25:
			case 26:
				$iTimeOffset = 0;
				break;
			case 27:
			case 28:
			case 29:
			case 30:
			case 31:
				$iTimeOffset = 60;
				break;
			case 32:
			case 33:
			case 34:
			case 35:
			case 36:
			case 37:
				$iTimeOffset = 2 * 60;
				break;
			case 38:
			case 39:
			case 40:
				$iTimeOffset = 3 * 60;
				break;
			case 41:
				$iTimeOffset = 3.5 * 60;
				break;
			case 42:
			case 43:
			case 44:
				$iTimeOffset = 4 * 60;
				break;
			case 45:
				$iTimeOffset = 4.5 * 60;
				break;
			case 46:
				$iTimeOffset = 5 * 60;
				break;
			case 47:
				$iTimeOffset = 5.5 * 60;
				break;
			case 48:
				$iTimeOffset = 5 * 60 + 45;
				break;
			case 49:
			case 50:
			case 51:
			case 52:
				$iTimeOffset = 6 * 60;
				break;
			case 53:
				$iTimeOffset = 6.5 * 60;
			case 54:
				$iTimeOffset = 7 * 60;
				break;
			case 55:
			case 56:
			case 57:
			case 58:
			case 59:
			case 60:
				$iTimeOffset = 8 * 60;
				break;
			case 61:
			case 62:
				$iTimeOffset = 9 * 60;
				break;
			case 63:
			case 64:
				$iTimeOffset = 9.5 * 60;
				break;
			case 65:
			case 66:
			case 67:
			case 68:
			case 69:
				$iTimeOffset = 10 * 60;
				break;
			case 70:
			case 71:
				$iTimeOffset = 11 * 60;
				break;
			case 72:
			case 73:
				$iTimeOffset = 12 * 60;
				break;
			case 74:
				$iTimeOffset = 13 * 60;
				break;
		}

		return $iTimeOffset;
	}

	/**
	 * @param int $iDefaultTimeZone
	 * @param string $sClientTimeZone = ''
	 * @return string
	 */
	public static function GetStrTimeZone($iDefaultTimeZone, $sClientTimeZone = '')
	{
		if ('' !== $sClientTimeZone)
		{
			return $sClientTimeZone;
		}

		if (null !== self::$sTimeZone)
		{
			return self::$sTimeZone;
		}

		$sResult = 'Etc/GMT';

		$aTimeZones = array(
			'Default', #0
			'Pacific/Kwajalein', #1
			'Pacific/Midway', #2
			'US/Hawaii', #3
			'US/Alaska', #4
			'America/Tijuana', #5
			'America/Dawson_Creek', #6
			'America/Denver', #7
			'America/Belize', #8
			'America/Chicago', #9
			'America/Cancun', #10
			'America/Belize', #11
			'America/Havana', #12
			'America/New_York', #13
			'America/Bogota', #14
			'America/Santiago', #15
			'America/Caracas', #16
			'America/Glace_Bay', #17
			'America/St_Johns', #18
			'America/Godthab', #19
			'America/Argentina/Buenos_Aires', #20
			'America/Sao_Paulo', #21
			'America/Noronha', #22
			'Atlantic/Cape_Verde', #23
			'Atlantic/Azores', #24
			'Africa/Abidjan', #25
			'Europe/Dublin', #26
			'Europe/Amsterdam', #27
			'Europe/Belgrade', #28
			'Europe/Brussels', #29
			'Europe/Sarajevo', #30
			'Africa/Algiers', #31
			'Europe/Minsk', #32
			'Europe/Bucharest', #33
			'Africa/Cairo', #34
			'Africa/Blantyre', #35
			'Africa/Harare', #36
			'Asia/Jerusalem', #37
			'Asia/Baghdad', #38
			'Asia/Kuwait', #39
			'Africa/Addis_Ababa', #40
			'Asia/Tehran', #41
			'Europe/Moscow', #42
			'Asia/Dubai', #43
			'Asia/Yerevan', #44
			'Asia/Kabul', #45
			'Asia/Tashkent', #46
			'Asia/Kolkata', #47
			'Asia/Katmandu', #48
			'Asia/Yekaterinburg', #49
			'Asia/Almaty', #50
			'Asia/Dhaka', #51
			'Asia/Colombo', #52
			'Asia/Rangoon', #53
			'Asia/Bangkok', #54
			'Asia/Krasnoyarsk', #55
			'Asia/Hong_Kong', #56
			'Asia/Irkutsk', #57
			'Asia/Kuala_Lumpur', #58
			'Australia/Perth', #59
			'Asia/Taipei', #60
			'Asia/Tokyo', #61
			'Asia/Seoul', #62
			'Australia/Adelaide', #63
			'Australia/Darwin', #64
			'Asia/Yakutsk', #65
			'Australia/Brisbane', #66
			'Australia/Canberra', #67
			'Pacific/Guam', #68
			'Australia/Hobart', #69
			'Asia/Vladivostok', #70
			'Pacific/Noumea', #71
			'Asia/Magadan', #72
			'Asia/Anadyr', #73
			'Pacific/Tongatapu' #74
		);

		$iDefaultTimeZone = isset($aTimeZones[$iDefaultTimeZone]) ? $iDefaultTimeZone : 0;

		if (0 === $iDefaultTimeZone)
		{
			$iOffset = self::GetTimeOffset($iDefaultTimeZone, $sClientTimeZone) / 60 * -1;
			$sSign = ($iOffset < 0) ? '-' : '+';
			$sResult = 'Etc/GMT'.$sSign.abs($iOffset);
		}
		else
		{
			$sResult = $aTimeZones[$iDefaultTimeZone];
		}

		self::$sTimeZone = $sResult;
		return self::$sTimeZone;
	}

	/**
	 * @param string $sDir
	 */
	public static function RecRmdir($sDir)
	{
		if (is_dir($sDir))
		{
			$aObjects = scandir($sDir);
			foreach ($aObjects as $sObject)
			{
				if ($sObject != '.' && $sObject != '..')
				{
					if (filetype($sDir.'/'.$sObject) == 'dir')
					{
						self::RecRmdir($sDir.'/'.$sObject);
					}
					else
					{
						unlink($sDir.'/'.$sObject);
					}
				}
			}

			reset($aObjects);
			rmdir($sDir);
		}
	}

	/**
	 * @return bool
	 */
	public static function IsPhp53()
	{
		return (bool) (version_compare(phpversion(), '5.3.0') > -1);
	}

	/**
	 * @return bool
	 */
	public static function HasGdSupport()
	{
		return (bool) @function_exists('imagecreatefrompng');
	}

	/**
	 * @return bool
	 */
	public static function HasSslSupport()
	{
		return (bool) @function_exists('openssl_open');
	}

	/**
	 * @return bool
	 */
	public static function IsMcryptSupported()
	{
		return (bool) @function_exists('mcrypt_encrypt');
	}

	/**
	 * @return bool
	 */
	public static function IsIconvSupported()
	{
		return (bool) @function_exists('iconv');
	}

	/**
	 * @return bool
	 */
	public static function IsGzipSupported()
	{
		return (bool)
			((false !== strpos(isset($_SERVER['HTTP_ACCEPT_ENCODING'])
				? $_SERVER['HTTP_ACCEPT_ENCODING'] : '', 'gzip'))
			&& function_exists('gzencode'));
	}

	/**
	 * @param string $sFileName
	 * @return string
	 */
	public static function GetFileExtension($sFileName)
	{
		$iLast = strrpos($sFileName, '.');
                $sExtension = '';
                if ($iLast !== false)
                {
                    $sExtension = substr($sFileName, $iLast + 1);
                    if (strlen($sExtension) > 5)
                    {
                        $sExtension = '';
                    }
                }
		return $sExtension;
	}

	/**
	 * @param int $sLen = 6
	 * @return string
	 */
	public static function GenerateShortHashString($sLen = 10)
	{
		$sResult = '';
		$sChars = 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789';
		$iCharLen = strlen($sChars);

		for (; 0 < $sLen; $sLen--)
		{
			$sResult .= substr($sChars, rand(0, $iCharLen), 1);
		}
		
		return $sResult;
	}

	public static function GetMimeContentTypes()
        {
                return array(

			'eml'	=> 'message/rfc822',
			'mime'	=> 'message/rfc822',
			'txt'	=> 'text/plain',
			'text'	=> 'text/plain',
			'def'	=> 'text/plain',
			'list'	=> 'text/plain',
			'in'	=> 'text/plain',
			'ini'	=> 'text/plain',
			'log'	=> 'text/plain',
			'sql'	=> 'text/plain',
			'cfg'	=> 'text/plain',
			'conf'	=> 'text/plain',
			'rtx'	=> 'text/richtext',
			'vcard'	=> 'text/vcard',
			'vcf'	=> 'text/vcard',
			'htm'	=> 'text/html',
			'html'	=> 'text/html',
			'csv'	=> 'text/csv',
			'ics'	=> 'text/calendar',
			'ifb'	=> 'text/calendar',
			'xml'	=> 'text/xml',
			'json'	=> 'application/json',
			'swf'	=> 'application/x-shockwave-flash',
			'hlp'	=> 'application/winhlp',
			'wgt'	=> 'application/widget',
			'chm'	=> 'application/vnd.ms-htmlhelp',
			'p10'	=> 'application/pkcs10',
			'p7c'	=> 'application/pkcs7-mime',
			'p7m'	=> 'application/pkcs7-mime',
			'p7s'	=> 'application/pkcs7-signature',
			'ttf'	=> 'application/x-ttf',
			'torrent'	=> 'application/x-bittorrent',

			// scripts
			'js'	=> 'application/javascript',
			'pl'	=> 'text/perl',
			'css'	=> 'text/css',
			'asp'	=> 'text/asp',
			'php'	=> 'application/x-httpd-php',
			'php3'	=> 'application/x-httpd-php',
			'php4'	=> 'application/x-httpd-php',
			'php5'	=> 'application/x-httpd-php',
			'phtml'	=> 'application/x-httpd-php',

			// images
			'png'	=> 'image/png',
			'jpg'	=> 'image/jpeg',
			'jpeg'	=> 'image/jpeg',
			'jpe'	=> 'image/jpeg',
			'jfif'	=> 'image/jpeg',
			'gif'	=> 'image/gif',
			'bmp'	=> 'image/bmp',
			'cgm'	=> 'image/cgm',
			'ief'	=> 'image/ief',
			'ico'	=> 'image/x-icon',
			'tif'	=> 'image/tiff',
			'tiff'	=> 'image/tiff',
			'svg'	=> 'image/svg+xml',
			'svgz'	=> 'image/svg+xml',
			'djv'	=> 'image/vnd.djvu',
			'djvu'	=> 'image/vnd.djvu',
			'webp'	=> 'image/webp',

			// archives
			'zip'	=> 'application/zip',
			'7z'	=> 'application/x-7z-compressed',
			'rar'	=> 'application/x-rar-compressed',
			'exe'	=> 'application/x-msdownload',
			'dll'	=> 'application/x-msdownload',
			'scr'	=> 'application/x-msdownload',
			'com'	=> 'application/x-msdownload',
			'bat'	=> 'application/x-msdownload',
			'msi'	=> 'application/x-msdownload',
			'cab'	=> 'application/vnd.ms-cab-compressed',
			'gz'	=> 'application/x-gzip',
			'tgz'	=> 'application/x-gzip',
			'bz'	=> 'application/x-bzip',
			'bz2'	=> 'application/x-bzip2',
			'deb'	=> 'application/x-debian-package',

			// fonts
			'psf'	=> 'application/x-font-linux-psf',
			'otf'	=> 'application/x-font-otf',
			'pcf'	=> 'application/x-font-pcf',
			'snf'	=> 'application/x-font-snf',
			'ttf'	=> 'application/x-font-ttf',
			'ttc'	=> 'application/x-font-ttf',

			// audio
			'mp3'	=> 'audio/mpeg',
			'amr'	=> 'audio/amr',
			'aac'	=> 'audio/x-aac',
			'aif'	=> 'audio/x-aiff',
			'aifc'	=> 'audio/x-aiff',
			'aiff'	=> 'audio/x-aiff',
			'wav'	=> 'audio/x-wav',
			'wma'	=> 'audio/x-ms-wma',
			'wax'	=> 'audio/x-ms-wax',
			'midi'	=> 'audio/midi',
			'mp4a'	=> 'audio/mp4',
			'ogg'	=> 'audio/ogg',
			'weba'	=> 'audio/webm',
			'ra'	=> 'audio/x-pn-realaudio',
			'ram'	=> 'audio/x-pn-realaudio',
			'rmp'	=> 'audio/x-pn-realaudio-plugin',
			'm3u'	=> 'audio/x-mpegurl',

			// video
			'flv'	=> 'video/x-flv',
			'qt'	=> 'video/quicktime',
			'mov'	=> 'video/quicktime',
			'wmv'	=> 'video/windows-media',
			'avi'	=> 'video/x-msvideo',
			'mpg'	=> 'video/mpeg',
			'mpeg'	=> 'video/mpeg',
			'mpe'	=> 'video/mpeg',
			'm1v'	=> 'video/mpeg',
			'm2v'	=> 'video/mpeg',
			'3gp'	=> 'video/3gpp',
			'3g2'	=> 'video/3gpp2',
			'h261'	=> 'video/h261',
			'h263'	=> 'video/h263',
			'h264'	=> 'video/h264',
			'jpgv'	=> 'video/jpgv',
			'mp4v'	=> 'video/mp4',
			'mpg4'	=> 'video/mp4',
			'ogv'	=> 'video/ogg',
			'webm'	=> 'video/webm',
			'm4v'	=> 'video/x-m4v',
			'asf'	=> 'video/x-ms-asf',
			'asx'	=> 'video/x-ms-asf',
			'wm'	=> 'video/x-ms-wm',
			'wmv'	=> 'video/x-ms-wmv',
			'wmx'	=> 'video/x-ms-wmx',
			'wvx'	=> 'video/x-ms-wvx',
			'movie'	=> 'video/x-sgi-movie',

			// adobe
			'pdf'	=> 'application/pdf',
			'psd'	=> 'image/vnd.adobe.photoshop',
			'ai'	=> 'application/postscript',
			'eps'	=> 'application/postscript',
			'ps'	=> 'application/postscript',

			// ms office
			'doc'	=> 'application/msword',
			'docx'	=> 'application/msword',
			'rtf'	=> 'application/rtf',
			'xls'	=> 'application/vnd.ms-excel',
			'ppt'	=> 'application/vnd.ms-powerpoint',

			// open office
			'odt'	=> 'application/vnd.oasis.opendocument.text',
			'ods'	=> 'application/vnd.oasis.opendocument.spreadsheet'

		);
        }
        
        /**
	 * @param string $sFileName
	 * @return string
	 */
	public static function MimeContentType($sFileName)
	{
		$sResult = 'application/octet-stream';

		$aMimeTypes = self::GetMimeContentTypes();
		$sExt = strtolower(self::GetFileExtension($sFileName));
		if (!empty($sExt) && isset($aMimeTypes[$sExt]))
		{
			$sResult = $aMimeTypes[$sExt];
		}

		return $sResult;
	}

        /**
	 * @param string $sMimeContentType
	 * @return string
	 */
	public static function GetFileExtensionFromMimeContentType($sMimeContentType)
	{
		$aMimeTypes = self::GetMimeContentTypes();
                return array_search($sMimeContentType, $aMimeTypes);
        }
        
	/**
	 * @param string $sLanguage
	 * @return string
	 */
	public static function ConvertLanguageNameToShort($sLanguage)
	{
		$aList = array(
			'english' => 'en',
			'polish' => 'pl',
			'estonian' => 'et',
			'bulgarian' => 'bg',
			'ukrainian' => 'uk',
			'thai' => 'th',
			'swedish' => 'sv',
			'spanish' => 'es',
			'russian' => 'ru',
			'romanian' => 'ro',
			'portuguese-portuguese' => 'pt',
			'portuguese-brazil' => 'pt-br',
//			'persian' => '', // TODO name? Farsi
			'latvian' => 'lv',
			'korean' => 'ko',
			'japanese' => 'ja',
			'italian' => 'it',
			'hungarian' => 'hu',
			'hebrew' => 'he',
			'german' => 'de',
			'french' => 'fr',
			'finnish' => 'fi',
			'dutch' => 'nl',
			'danish' => 'da',
			'chinese-Traditional' => 'zh-tw',
			'chinese-Simplified' => 'zh-cn',
			'arabic' => 'ar',
			'turkish' => 'tr',
			'norwegian' => 'nb',
//			'lithuanian' => 'lt',  // TODO
			'greek' => 'el',
			'czech' => 'cs'
		);

		$sLanguage = strtolower($sLanguage);
		return isset($aList[$sLanguage]) ? $aList[$sLanguage] : $sLanguage;
	}

	/**
	 * @param int $iBigInt
	 * @return int
	 */
	public static function GetGoodBigInt($iBigInt)
	{
		if (null === $iBigInt || false == $iBigInt)
		{
			return 0;
		}
		else if ($iBigInt > API_PHP_INT_MAX)
		{
			return API_PHP_INT_MAX;
		}
		else if ($iBigInt < API_PHP_INT_MIN)
		{
			return API_PHP_INT_MIN;
		}

		return (int) $iBigInt;
	}

	/**
	 * @param string $sUtf8String
	 * @param int $iLength
	 * @return string
	 */
	public static function Utf8Truncate($sUtf8String, $iLength)
	{
		if (strlen($sUtf8String) <= $iLength)
		{
			return $sUtf8String;
		}

		while ($iLength >= 0)
		{
			if ((ord($sUtf8String[$iLength]) < 0x80) || (ord($sUtf8String[$iLength]) >= 0xC0))
			{
				return substr($sUtf8String, 0, $iLength);
			}

			$iLength--;
		}

		return '';
	}

	/**
	 * @param string $sUtf8String
	 * @return string
	 */
	public static function Utf8ToLowerCase($sUtf8String)
	{
		if (function_exists('mb_strtolower'))
		{
			return mb_strtolower($sUtf8String, 'utf-8');
		}

		$aMapping = array(
			"\xC3\x80" => "\xC3\xA0", "\xC3\x81" => "\xC3\xA1",
			"\xC3\x82" => "\xC3\xA2", "\xC3\x83" => "\xC3\xA3", "\xC3\x84" => "\xC3\xA4", "\xC3\x85" => "\xC3\xA5",
			"\xC3\x86" => "\xC3\xA6", "\xC3\x87" => "\xC3\xA7", "\xC3\x88" => "\xC3\xA8", "\xC3\x89" => "\xC3\xA9",
			"\xC3\x8A" => "\xC3\xAA", "\xC3\x8B" => "\xC3\xAB", "\xC3\x8C" => "\xC3\xAC", "\xC3\x8D" => "\xC3\xAD",
			"\xC3\x8E" => "\xC3\xAE", "\xC3\x8F" => "\xC3\xAF", "\xC3\x90" => "\xC3\xB0", "\xC3\x91" => "\xC3\xB1",
			"\xC3\x92" => "\xC3\xB2", "\xC3\x93" => "\xC3\xB3", "\xC3\x94" => "\xC3\xB4", "\xC3\x95" => "\xC3\xB5",
			"\xC3\x96" => "\xC3\xB6", "\xC3\x98" => "\xC3\xB8", "\xC3\x99" => "\xC3\xB9", "\xC3\x9A" => "\xC3\xBA",
			"\xC3\x9B" => "\xC3\xBB", "\xC3\x9C" => "\xC3\xBC", "\xC3\x9D" => "\xC3\xBD", "\xC3\x9E" => "\xC3\xBE",
			"\xC4\x80" => "\xC4\x81", "\xC4\x82" => "\xC4\x83", "\xC4\x84" => "\xC4\x85", "\xC4\x86" => "\xC4\x87",
			"\xC4\x88" => "\xC4\x89", "\xC4\x8A" => "\xC4\x8B", "\xC4\x8C" => "\xC4\x8D", "\xC4\x8E" => "\xC4\x8F",
			"\xC4\x90" => "\xC4\x91", "\xC4\x92" => "\xC4\x93", "\xC4\x96" => "\xC4\x97", "\xC4\x98" => "\xC4\x99",
			"\xC4\x9A" => "\xC4\x9B", "\xC4\x9C" => "\xC4\x9D", "\xC4\x9E" => "\xC4\x9F", "\xC4\xA0" => "\xC4\xA1",
			"\xC4\xA2" => "\xC4\xA3", "\xC4\xA4" => "\xC4\xA5", "\xC4\xA6" => "\xC4\xA7", "\xC4\xA8" => "\xC4\xA9",
			"\xC4\xAA" => "\xC4\xAB", "\xC4\xAE" => "\xC4\xAF", "\xC4\xB4" => "\xC4\xB5", "\xC4\xB6" => "\xC4\xB7",
			"\xC4\xB9" => "\xC4\xBA", "\xC4\xBB" => "\xC4\xBC", "\xC4\xBD" => "\xC4\xBE", "\xC5\x81" => "\xC5\x82",
			"\xC5\x83" => "\xC5\x84", "\xC5\x85" => "\xC5\x86", "\xC5\x87" => "\xC5\x88", "\xC5\x8A" => "\xC5\x8B",
			"\xC5\x8C" => "\xC5\x8D", "\xC5\x90" => "\xC5\x91", "\xC5\x94" => "\xC5\x95", "\xC5\x96" => "\xC5\x97",
			"\xC5\x98" => "\xC5\x99", "\xC5\x9A" => "\xC5\x9B", "\xC5\x9C" => "\xC5\x9D", "\xC5\x9E" => "\xC5\x9F",
			"\xC5\xA0" => "\xC5\xA1", "\xC5\xA2" => "\xC5\xA3", "\xC5\xA4" => "\xC5\xA5", "\xC5\xA6" => "\xC5\xA7",
			"\xC5\xA8" => "\xC5\xA9", "\xC5\xAA" => "\xC5\xAB", "\xC5\xAC" => "\xC5\xAD", "\xC5\xAE" => "\xC5\xAF",
			"\xC5\xB0" => "\xC5\xB1", "\xC5\xB2" => "\xC5\xB3", "\xC5\xB4" => "\xC5\xB5", "\xC5\xB6" => "\xC5\xB7",
			"\xC5\xB8" => "\xC3\xBF", "\xC5\xB9" => "\xC5\xBA", "\xC5\xBB" => "\xC5\xBC", "\xC5\xBD" => "\xC5\xBE",
			"\xC6\xA0" => "\xC6\xA1", "\xC6\xAF" => "\xC6\xB0", "\xC8\x98" => "\xC8\x99", "\xC8\x9A" => "\xC8\x9B",
			"\xCE\x86" => "\xCE\xAC", "\xCE\x88" => "\xCE\xAD", "\xCE\x89" => "\xCE\xAE", "\xCE\x8A" => "\xCE\xAF",
			"\xCE\x8C" => "\xCF\x8C", "\xCE\x8E" => "\xCF\x8D", "\xCE\x8F" => "\xCF\x8E", "\xCE\x91" => "\xCE\xB1",
			"\xCE\x92" => "\xCE\xB2", "\xCE\x93" => "\xCE\xB3", "\xCE\x94" => "\xCE\xB4", "\xCE\x95" => "\xCE\xB5",
			"\xCE\x96" => "\xCE\xB6", "\xCE\x97" => "\xCE\xB7", "\xCE\x98" => "\xCE\xB8", "\xCE\x99" => "\xCE\xB9",
			"\xCE\x9A" => "\xCE\xBA", "\xCE\x9B" => "\xCE\xBB", "\xCE\x9C" => "\xCE\xBC", "\xCE\x9D" => "\xCE\xBD",
			"\xCE\x9E" => "\xCE\xBE", "\xCE\x9F" => "\xCE\xBF", "\xCE\xA0" => "\xCF\x80", "\xCE\xA1" => "\xCF\x81",
			"\xCE\xA3" => "\xCF\x83", "\xCE\xA4" => "\xCF\x84", "\xCE\xA5" => "\xCF\x85", "\xCE\xA6" => "\xCF\x86",
			"\xCE\xA7" => "\xCF\x87", "\xCE\xA8" => "\xCF\x88", "\xCE\xA9" => "\xCF\x89", "\xCE\xAA" => "\xCF\x8A",
			"\xCE\xAB" => "\xCF\x8B", "\xD0\x81" => "\xD1\x91", "\xD0\x82" => "\xD1\x92", "\xD0\x83" => "\xD1\x93",
			"\xD0\x84" => "\xD1\x94", "\xD0\x85" => "\xD1\x95", "\xD0\x86" => "\xD1\x96", "\xD0\x87" => "\xD1\x97",
			"\xD0\x88" => "\xD1\x98", "\xD0\x89" => "\xD1\x99", "\xD0\x8A" => "\xD1\x9A", "\xD0\x8B" => "\xD1\x9B",
			"\xD0\x8C" => "\xD1\x9C", "\xD0\x8E" => "\xD1\x9E", "\xD0\x8F" => "\xD1\x9F", "\xD0\x90" => "\xD0\xB0",
			"\xD0\x91" => "\xD0\xB1", "\xD0\x92" => "\xD0\xB2", "\xD0\x93" => "\xD0\xB3", "\xD0\x94" => "\xD0\xB4",
			"\xD0\x95" => "\xD0\xB5", "\xD0\x96" => "\xD0\xB6", "\xD0\x97" => "\xD0\xB7", "\xD0\x98" => "\xD0\xB8",
			"\xD0\x99" => "\xD0\xB9", "\xD0\x9A" => "\xD0\xBA", "\xD0\x9B" => "\xD0\xBB", "\xD0\x9C" => "\xD0\xBC",
			"\xD0\x9D" => "\xD0\xBD", "\xD0\x9E" => "\xD0\xBE", "\xD0\x9F" => "\xD0\xBF", "\xD0\xA0" => "\xD1\x80",
			"\xD0\xA1" => "\xD1\x81", "\xD0\xA2" => "\xD1\x82", "\xD0\xA3" => "\xD1\x83", "\xD0\xA4" => "\xD1\x84",
			"\xD0\xA5" => "\xD1\x85", "\xD0\xA6" => "\xD1\x86", "\xD0\xA7" => "\xD1\x87", "\xD0\xA8" => "\xD1\x88",
			"\xD0\xA9" => "\xD1\x89", "\xD0\xAA" => "\xD1\x8A", "\xD0\xAB" => "\xD1\x8B", "\xD0\xAC" => "\xD1\x8C",
			"\xD0\xAD" => "\xD1\x8D", "\xD0\xAE" => "\xD1\x8E", "\xD0\xAF" => "\xD1\x8F", "\xD2\x90" => "\xD2\x91",
			"\xE1\xB8\x82" => "\xE1\xB8\x83", "\xE1\xB8\x8A" => "\xE1\xB8\x8B", "\xE1\xB8\x9E" => "\xE1\xB8\x9F", "\xE1\xB9\x80" => "\xE1\xB9\x81",
			"\xE1\xB9\x96" => "\xE1\xB9\x97", "\xE1\xB9\xA0" => "\xE1\xB9\xA1", "\xE1\xB9\xAA" => "\xE1\xB9\xAB", "\xE1\xBA\x80" => "\xE1\xBA\x81",
			"\xE1\xBA\x82" => "\xE1\xBA\x83", "\xE1\xBA\x84" => "\xE1\xBA\x85", "\xE1\xBB\xB2" => "\xE1\xBB\xB3"
		);

		return strtr(strtolower($sUtf8String), $aMapping);
	}

	/**
	 * @param string $sPabUri
	 * @return array
	 */
	public static function LdapUriParse($sPabUri)
	{
		$aReturn = array(
			'host' => '127.0.0.1',
			'port' => 389,
			'search_dn' => '',
		);

		$sPabUriLower = strtolower($sPabUri);
		if ('ldap://' === substr($sPabUriLower, 0, 7))
		{
			$sPabUriLower = substr($sPabUriLower, 7);
		}

		$aPabUriLowerExplode = explode('/', $sPabUriLower, 2);
		$aReturn['search_dn'] = isset($aPabUriLowerExplode[1]) ? $aPabUriLowerExplode[1] : '';

		if (isset($aPabUriLowerExplode[0]))
		{
			$aPabUriLowerHostPortExplode = explode(':', $aPabUriLowerExplode[0], 2);
			$aReturn['host'] = isset($aPabUriLowerHostPortExplode[0]) ? $aPabUriLowerHostPortExplode[0] : $aReturn['host'];
			$aReturn['port'] = isset($aPabUriLowerHostPortExplode[1]) ? (int) $aPabUriLowerHostPortExplode[1] : $aReturn['port'];
		}

		return $aReturn;
	}

	/**
	 * @return string
	 */
	public static function RequestUri()
	{
		$sUri = '';
		if (isset($_SERVER['REQUEST_URI']))
		{
			$sUri = $_SERVER['REQUEST_URI'];
		}
		else
		{
			if (isset($_SERVER['SCRIPT_NAME']))
			{
				if (isset($_SERVER['argv'], $_SERVER['argv'][0]))
				{
					$sUri = $_SERVER['SCRIPT_NAME'].'?'.$_SERVER['argv'][0];
				}
				else if (isset($_SERVER['QUERY_STRING']))
				{
					$sUri = $_SERVER['SCRIPT_NAME'].'?'.$_SERVER['QUERY_STRING'];
				}
				else
				{
					$sUri = $_SERVER['SCRIPT_NAME'];
				}
			}
		}

		$sUri = '/'. ltrim($sUri, '/');
		return $sUri;
	}

	/**
	 * @return string $sFileName
	 * @return string
	 */
	public static function CsvToArray($sFileName)
	{
		if (!file_exists($sFileName) || !is_readable($sFileName))
		{
			return false;
		}

		$aHeaders = null;
		$aData = array();

		@setlocale(LC_CTYPE, 'en_US.UTF-8');
		\ini_set('auto_detect_line_endings', true);
		
		if (false !== ($rHandle = @fopen($sFileName, 'rb')))
		{
			$sDelimiterSearchString = @fread($rHandle, 2000);
			rewind($rHandle);

			$sDelimiter = (
				(int) substr_count($sDelimiterSearchString, ',') > (int) substr_count($sDelimiterSearchString, ';'))
					? ',' : ';';

			while (false !== ($mRow = fgetcsv($rHandle, 5000, $sDelimiter, '"')))
			{
				$mRow = preg_replace('/[\r\n]+/', "\n", $mRow);
				if (null === $aHeaders)
				{
					if (3 >= count($mRow))
					{
						CApi::Log('Invalid csv headers');
						CApi::LogObject($mRow);
						fclose($rHandle);
						return $aData;
					}

					$aHeaders = $mRow;
				}
				else
				{
					$aNewItem = array();
					foreach ($aHeaders as $iIndex => $sHeaderValue)
					{
						$aNewItem[@iconv('utf-8', 'utf-8//IGNORE', $sHeaderValue)] =
							isset($mRow[$iIndex]) ? $mRow[$iIndex] : '';
					}

					$aData[] = $aNewItem;
				}
			}

			fclose($rHandle);
		}

		ini_set('auto_detect_line_endings', false);

		return $aData;
	}

	public static function DirMtime($dir)
	{
		$last_modified = 0;
		$files = glob($dir.'/*');
		foreach ($files as $file)
		{
			if (is_dir($file)) {
				$modified = self::DirMtime($file);
			} else {
				$modified = filemtime($file);
			}
			if ($modified > $last_modified) {
				$last_modified = $modified;
			}
		}
		return $last_modified;
	}

	public static function GlobRecursive($pattern, $flags = 0)
	{
		$files = glob($pattern, $flags);

		$aPaternFiles = glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT);

		if (is_array($aPaternFiles) && is_array($files))
		{
			foreach ($aPaternFiles as $dir)
			{
				$files = array_merge($files, self::GlobRecursive($dir.'/'.basename($pattern), $flags));
			}
		}

		return is_array($files) ? $files : array();
	}

	/**
	 * @param string $sPhone
	 * @return string
	 */
	public static function ClearPhone($sPhone)
	{
		return preg_replace('/^0000000000/', '+', preg_replace('/[^\d]+/', '',
			preg_replace('/^[+]/', '0000000000', trim($sPhone))));
	}
	
	/**
	 * @param string $sSearch
	 * @return string
	 */
	public static function ClearPhoneSearch($sSearch)
	{
		return preg_replace('/[\s\-()]+/', '', preg_replace('/^[+]/', '', trim($sSearch)));
	}

	/**
	 * @param string $sSearch
	 * @return bool
	 */
	public static function IsPhoneSearch($sSearch)
	{
		return (bool) preg_match('/^[\d]{3,}$/', self::ClearPhoneSearch($sSearch));
	}

	/**
	 * @param string $sFolder
	 * @param int $iMessageCount
	 * @param int $iMessageUnseenCount
	 * @param string $sUidNext
	 * @return string
	 */
	public static function GenerateFolderHash($sFolder, $iMessageCount, $iMessageUnseenCount, $sUidNext)
	{
		$iMessageUnseenCount  =0;

		$sD = "\x0";
		return md5($sFolder.$sD.$iMessageCount.$sD.$iMessageUnseenCount.$sD.$sUidNext);
	}

	/**
	 * @param string $sMimeType
	 * @param string $sFileName = ''
	 * @return bool
	 */
	public static function IsGDImageMimeTypeSuppoted($sMimeType, $sFileName = '')
	{
		$bResult = function_exists('gd_info');
		if ($bResult)
		{
			$bResult = false;
			switch (strtolower($sMimeType))
			{
				case 'image/jpg':
				case 'image/jpeg':
					$bResult = function_exists('imagecreatefromjpeg');
					break;
				case 'image/png':
					$bResult = function_exists('imagecreatefrompng');
					break;
				case 'image/gif':
					$bResult = function_exists('imagecreatefromgif');
					break;
			}
		}

		return $bResult;
	}

	public static function GetDirectorySize($path)
	{
		$size = 0;
		$files = 0;
		$directories = 0;

		$handle = is_dir($path) ? opendir($path) : null;
		if ($handle)
		{
			while (false !== ($file = readdir($handle)))
			{
				$nextpath = $path . '/' . $file;
				if ($file != '.' && $file != '..' && !is_link($nextpath))
				{
					if (is_dir($nextpath))
					{
						$directories++;
						$result = self::GetDirectorySize($nextpath);
						$size += $result['size'];
						$files += $result['files'];
						$directories += $result['directories'];
					}
					elseif (is_file($nextpath))
					{
						$size += filesize($nextpath);
						$files++;
					}
				}
			}
			
			if (is_resource($handle))
			{
				closedir($handle);
			}
		}

		return array(
		  'size' => $size,
		  'files' => $files,
		  'directories' => $directories
		);
	}
	
	public static function SearchFiles($sPath, $sPattern)
	{
		$files = array();

		// Create recursive dir iterator which skips dot folders
		$oDirIterator = new RecursiveDirectoryIterator($sPath, 
				FilesystemIterator::SKIP_DOTS |
				FilesystemIterator::UNIX_PATHS
		);		

		$oIterators = new RecursiveIteratorIterator($oDirIterator,
				RecursiveIteratorIterator::SELF_FIRST
		);
		
		foreach($oIterators as $oIterator)
		{
			$sName = $oIterator->getFilename();
			$aMatches = array();
			$iResult = preg_match("/" . preg_quote($sPattern) . "/ui", $sName, $aMatches);
			if ($sName !== '.sabredav' && $sName !== API_HELPDESK_PUBLIC_NAME && $iResult === 1)
			{
				$files[] = $oIterator->getPathname();		
			}
		}
		
		return $files;
	}
	
	public static function GetRemoteFileInfo($sUrl)
	{
		$aResult = array(
			'size' => 0,
			'content-type' => ''
		);

		$oCurl = \curl_init();
		\curl_setopt_array($oCurl, array(
			CURLOPT_URL => $sUrl,
			CURLOPT_HEADER => true,
			CURLOPT_SSL_VERIFYPEER => false,
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_NOBODY => true
		));
		
		\curl_exec($oCurl);
		$aInfo = \curl_getinfo($oCurl);

		if ($aInfo)
		{
			$sContentType = '';
			$aResult['size'] = isset($aInfo['download_content_length']) ? (int) $aInfo['download_content_length'] : 0;
			
			if (isset($aInfo['content_type']))
			{
				$aContentType = explode(';', $aInfo['content_type']);
				$sContentType = isset($aContentType[0]) ? $aContentType[0] : '';
			}
			
			$aResult['content-type'] = $sContentType;
		}

		if (\is_resource($oCurl))
		{
			\curl_close($oCurl);
		}
		
		return $aResult;
	}

	/**
	 * @param string $sUrl
	 * @return bool
	 */
	public static function RemoteFileExists($sUrl)
	{
		if (0 === strlen(trim($sUrl)))
		{
			return false;
		}
		
		$oCurl = curl_init($sUrl);
		if (is_resource($oCurl))
		{
			curl_setopt($oCurl, CURLOPT_NOBODY, true);
			curl_exec($oCurl);
		}

		$iCode = curl_getinfo($oCurl, CURLINFO_HTTP_CODE);
		
		if (is_resource($oCurl))
		{
			curl_close($oCurl);
		}

		return ($iCode === 200 || $iCode === 0);
	}

	/**
	 * @param string $sLink
	 * @return int
	 */
	public static function GetLinkType($sLink)
	{
		$iResult = \EFileStorageLinkType::Unknown;
		if (false !== strpos($sLink, '.google.com'))
		{
			$iResult = \EFileStorageLinkType::GoogleDrive;
		}
		else if (false !== strpos($sLink, 'dl.dropboxusercontent.com') || 
				false !== strpos($sLink, 'dropbox.com'))
		{
			$iResult = \EFileStorageLinkType::DropBox;
		}
		
		return $iResult;
	}

	public static function PopulateGoogleDriveFileInfo(&$oFileInfo)
	{
		if (!isset($oFileInfo->downloadUrl))
		{
			switch($oFileInfo->mimeType)
			{
				case 'application/vnd.google-apps.document':
					$oFileInfo->downloadUrl = $oFileInfo->exportLinks->{'application/vnd.openxmlformats-officedocument.wordprocessingml.document'};
					$oFileInfo->title = $oFileInfo->title . '.docx';
					break;
				case 'application/vnd.google-apps.spreadsheet':
					$oFileInfo->downloadUrl = $oFileInfo->exportLinks->{'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'};
					$oFileInfo->title = $oFileInfo->title . '.xlsx';
					break;
				case 'application/vnd.google-apps.drawing':
					$oFileInfo->downloadUrl = $oFileInfo->exportLinks->{'image/png'};
					$oFileInfo->title = $oFileInfo->title . '.png';
					break;
				case 'application/vnd.google-apps.presentation':
					$oFileInfo->downloadUrl = $oFileInfo->exportLinks->{'application/vnd.openxmlformats-officedocument.presentationml.presentation'};
					$oFileInfo->title = $oFileInfo->title . '.pptx';
					break;
				default:
					$oFileInfo->downloadUrl = $oFileInfo->exportLinks->{'application/pdf'};
					$oFileInfo->title = $oFileInfo->title . '.pdf';
					break;
			}
			
			if (!isset($oFileInfo->fileSize))
			{
				$aRemoteFileInfo = \api_Utils::GetRemoteFileInfo($oFileInfo->downloadUrl);
				$oFileInfo->fileSize = $aRemoteFileInfo['size'];
			}
		}
	}
	
	public static function GetGoogleDriveFileInfo($sLink, $sGoogleAPIKey, $sAccessToken = null, $bLinkAsId = false)
	{
		$mResult = false;
		$sGDId = '';
		if ($bLinkAsId)
		{
			$sGDId = $sLink;
		}
		else
		{
			$matches = array();
			preg_match("%https://\w+\.google\.com/\w+/d/(.*?)/edit*%", $sLink, $matches);
			$sGDId = isset($matches[1]) ? $matches[1] : '';	
		}
		
		if ($sGDId !== '')
		{
			$sUrl = "https://www.googleapis.com/drive/v2/files/".$sGDId.'?key='.$sGoogleAPIKey;
			$aHeaders = $sAccessToken ? array('Authorization: Bearer '. $sAccessToken) : array();

			$sContentType = '';
			$iCode = 0;

			$mResult = \MailSo\Base\Http::SingletonInstance()->GetUrlAsString($sUrl, '', $sContentType, $iCode, null, 10, '', '', $aHeaders);
			if ($iCode === 200)
			{
				$mResult = json_decode($mResult);	
				self::PopulateGoogleDriveFileInfo($mResult);
			}
			else
			{
				$mResult = false;
			}
		}
		else
		{
			$mResult = false;
		}
		
		return $mResult;
	}
	
	public static function GetGoogleUserInfo($sGoogleAPIKey, $sAccessToken = null)
	{
		$mResult = false;
		$sUrl = "https://www.googleapis.com/plus/v1/people/me?key=".$sGoogleAPIKey;
		$aHeaders = $sAccessToken ? array('Authorization: Bearer '. $sAccessToken) : array();

		$sContentType = '';
		$iCode = 0;

		$mResult = \MailSo\Base\Http::SingletonInstance()->GetUrlAsString($sUrl, '', $sContentType, $iCode, null, 10, '', '', $aHeaders);
		return ($iCode === 200) ? json_decode($mResult) : false;
	}
	
	/**
	 * @return \CAccount | null
	 */
	public static function GetDefaultAccount()
	{
		$oResult = null;
		$oApiUsers = /* @var $oApiUsers \CApiUsersManager */ \CApi::Manager('users');
		$oApiIntegrator /* @var $oApiIntegrator \CApiIntegratorManager */ = \CApi::Manager('integrator');
		$iUserId = $oApiIntegrator->GetLogginedUserId();
		if (0 < $iUserId)
		{
			$iAccountId = $oApiUsers->GetDefaultAccountId($iUserId);
			if (0 < $iAccountId)
			{
				$oAccount = $oApiUsers->GetAccountById($iAccountId);
				if ($oAccount instanceof \CAccount && !$oAccount->IsDisabled)
				{
					$oResult = $oAccount;
				}
			}
		}

		return $oResult;
	}
	
	public static function GetAppUrl()
	{
		$aUrlParts = parse_url($_SERVER['HTTP_REFERER']);

		$sProtocol = !empty($aUrlParts['scheme']) ? $aUrlParts['scheme'] : 'http';
		$sHost = !empty($aUrlParts['host']) ? $aUrlParts['host'] : 'localhost';
		$sPath = !empty($aUrlParts['path']) ? str_replace('index.php', '', $aUrlParts['path']) : '';
		$sPort = !empty($aUrlParts['port']) ? ':'.$aUrlParts['port'] : '';
		
		return $sProtocol.'://'.$sHost.$sPath.$sPort;
	}
}

/**
 * @package Api
 */
class api_Validate
{
	/**
	 * @param string $sFuncName
	 * @return string
	 */
	public static function GetError($sFuncName)
	{
		switch ($sFuncName)
		{
			case 'Port':
				return 'Required valid port.';
			case 'IsEmpty':
				return 'Required fields cannot be empty.';
		}

		return 'Error';
	}

	/**
	 * @param mixed $mValue
	 * @return bool
	 */
	public static function IsValidTenantLogin($mValue)
	{
		return preg_match('/^[a-zA-Z0-9@\-_\.]+$/', $mValue);
	}

	/**
	 * @param mixed $mValue
	 * @return bool
	 */
	public static function IsValidChannelLogin($mValue)
	{
		return preg_match('/^[a-zA-Z0-9@\-_\.]+$/', $mValue);
	}

	/**
	 * @param mixed $mValue
	 * @return bool
	 */
	public static function IsEmpty($mValue)
	{
		return !is_string($mValue) || 0 === strlen($mValue);
	}

	/**
	 * @param mixed $mValue
	 * @return bool
	 */
	public static function Port($mValue)
	{
		$bResult = false;
		if (0 < strlen((string) $mValue) && is_numeric($mValue))
		{
			$iPort = (int) $mValue;
			if (0 < $iPort && $iPort < 65355)
			{
				$bResult = true;
			}
		}
		return $bResult;
	}
}

/**
 * @package Api
 */
class CApiValidationException extends CApiBaseException  {}

/**
 * @package Api
 */
class api_Ints
{
	/**
	 * @return int
	 */
	public static function getIntMax()
	{
		$iMax = 0x7fff;
		$iProbe = 0x7fffffff;
		while ($iMax == ($iProbe >> 16))
		{
			$iMax = $iProbe;
			$iProbe = ($iProbe << 16) + 0xffff;
		}
		return $iMax;
	}
}

function fNullCallback() {}

defined('API_PHP_INT_MAX') || define('API_PHP_INT_MAX', (int) api_Ints::getIntMax());
defined('API_PHP_INT_MIN') || define('API_PHP_INT_MIN', (int) (API_PHP_INT_MAX + 1));

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