<?php
/*
 * This code is part of GOsa (https://gosa.gonicus.de)
 * Copyright (C) 2008 Cajus Pollmeier
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*! \brief Test functions
 *
 * This class provides various test functions. It enables to check
 * if a given value is:
 *
 * - a phone numnber
 * - a DNS name
 * - an URL
 * etc.
 *
 * The functions need to be handled with care, because they are not as strict
 * as one might expect.
 */ 
class tests {

  /*! \brief Test if the given string is a phone number */
  public static function is_phone_nr($nr)
  {
    if ($nr == ""){
      return (TRUE);
    }

    // We require at least one numeric character in the number string.
    return preg_match ("/^[\/0-9 ()+*-]*[0-9]{1}[\/0-9 ()+*-]*$/", $nr);
  }


  /*! \brief Test if the given string contains characters allowed in a DNS name */
  public static function is_dns_name($str, &$reason = "", &$regex = "")
  {
    $regex = "[a-z0-9\.\-]";
  
    # Check over all length
    if(preg_match("/\./", $str) && strlen($str) >= 255){
        $reason = 1;
        return(FALSE);
    }
  
    # Check hostname length
    if(strlen(preg_replace("/\..*$/", "", $str)) > 63){
        $reason = 2;
        return(FALSE);
    }
  
    # Split host and domain part
    $tmp = preg_split("/\./", $str, 2);
    $host = $tmp[0];
    $domain = count($tmp) == 1 ? NULL : $tmp[1];
  
    if(!preg_match("/^{$regex}*$/i", $host)){
        $reason = 3;
        return(FALSE);
    }
  
    if ($domain) {
        $regex = "[a-z0-9\.\-_]";
        if(!preg_match("/^{$regex}*$/i", $domain)){
            $reason = 4;
            return(FALSE);
        }
    }
  
    return(TRUE);
  }


  /*! \brief Test if the given string is an URL */
  public static function is_url($url)
  {
    if ($url == ""){
      return (TRUE);
    }

    return preg_match ("/^(http|https):\/\/((?:[a-zA-Z0-9_-]+\.?)+):?(\d*)/", $url);
  }


  /*! \brief Test if the given string is a DN */
  public static function is_dn($dn)
  {
    if ($dn == ""){
      return (TRUE);
    }

    return preg_match ("/^[a-z0-9 _-]+$/i", $dn);
  }


  /*! \brief Test if the given string is an uid */
  public static function is_uid($uid)
  {
    if ($uid == ""){
      return (TRUE);
    }

    return preg_match ("/".get_uid_regexp()."/", $uid);
  }


  /*! \brief Test if the given string is an IP */
  public static function is_ip($ip)
  {
    if(function_exists('filter_var')) {
      return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
    } else {
      return preg_match("/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $ip);
    }
  }


  public static function is_ipv6($ip)
  {
    if(function_exists('filter_var')) {
        return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
    } else {
        $ipv4 = '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)';
        $g = '([0-9a-f]{1,4})'; //IPv6 group
        return preg_match("/^$g:$g:$g:$g:$g:$g:$g:$g$/", $ip) ||
               preg_match("/^$g:$g:$g:$g:$g:$g:$ipv4$/", $ip);
    }
  }


  /*! \brief Test if the given string is a mac address */
  public static function is_mac($mac)
  {
    return preg_match("/^[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]:[a-f0-9][a-f0-9]$/i", $mac);
  }


  /*! \brief Checks if the given ip address dosen't match 
      "is_ip" because there is also a sub net mask given */
  public static function is_ip_with_subnetmask($ip)
  {
          /* Generate list of valid submasks */
          $res = array();
          for($e = 0 ; $e <= 32; $e++){
                  $res[$e] = $e;
          }
          $i[0] =255;
          $i[1] =255;
          $i[2] =255;
          $i[3] =255;
          for($a= 3 ; $a >= 0 ; $a --){
                  $c = 1;
                  while($i[$a] > 0 ){
                          $str  = $i[0].".".$i[1].".".$i[2].".".$i[3];
                          $res[$str] = $str;
                          $i[$a] -=$c;
                          $c = 2*$c;
                  }
          }
          $res["0.0.0.0"] = "0.0.0.0";
          if(preg_match("/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/", $ip)){
                  $mask = preg_replace("/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.".
                          "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/","",$ip);

                  $mask = preg_replace("/^\//","",$mask);
                  if((in_array_strict("$mask",$res)) && preg_match("/^[0-9\.]/",$mask)){
                          return(TRUE);
                  }
          }
          return(FALSE);
  }


  /*! \brief Simple is domain check
   *
   * This checks if the given string looks like "string(...).string"
   */
  public static function is_domain($str)
  {
    return(preg_match("/^(([a-z0-9\-]{2,63})\.)*[a-z]{2,63}$/i",$str));
  }


  /*! \brief Check if the given argument is an id */
  public static function is_id($id)
  {
    if ($id == ""){
      return (FALSE);
    }

    return preg_match ("/^[0-9]+$/", $id);
  }


  /*! \brief Check if the given argument is a path */
  public static function is_path($path)
  {
    if ($path == ""){
      return (TRUE);
    }
    if (!preg_match('/^[a-z0-9%\/_.+-]+$/i', $path)){
      return (FALSE);
    }

    return preg_match ("/\/.+$/", $path);
  }


  /*! \brief Check if the given argument is an email */
  public static function is_email($address, $template= FALSE)
  {
    if ($address == ""){
      return (TRUE);
    }
    if ($template){
      return preg_match ("/^[a-zA-Z0-9_{\[\]}%]+([.][a-zA-Z0-9_{\[\]}%\+-]+)*[@][a-zA-Z0-9_{\[\]}%-]+([.][a-zA-Z0-9_{\[\]}%-]+)*$/",
          $address);
    } else {
      return preg_match ("/^[a-zA-Z0-9_\+-]+([.][a-zA-Z0-9_\+-]+)*[@][a-zA-Z0-9_-]+([.][a-zA-Z0-9_-]+)*$/",
          $address);
    }
  }


  /* \brief Check if the given department name is valid */
  public static function is_department_name_reserved($name,$base)
  {
    $reservedName = array("systems","apps","incomming","internal","accounts","fax","addressbook",
                            preg_replace("/ou=(.*),/","\\1",get_people_ou()),
                            preg_replace("/ou=(.*),/","\\1",get_groups_ou()));
    $follwedNames['/ou=fai,ou=configs,ou=systems,/'] = array("fai","hooks","templates","scripts","disk","packages","variables","profiles");

    /* Check if name is one of the reserved names */
    if(in_array_ics($name,$reservedName)) {
      return(true);
    }

    /* Check all follow combinations if name is in array && parent base == array_key, return false*/
    foreach($follwedNames as $key => $names){
      if((in_array_ics($name,$names)) && (preg_match($key,$base))){
        return(true);
      }
    }
    return(false);
  }


  /* \brief Check if $ip1 and $ip2 represents a valid IP range
   *  \return TRUE in case of a valid range, FALSE in case of an error. 
   */
  public static function is_ip_range($ip1,$ip2)
  {
    if(!tests::is_ip($ip1) || !tests::is_ip($ip2)){
      return(FALSE);
    }else{
      $ar1 = explode(".",$ip1);
      $var1 = $ar1[0] * (16777216) + $ar1[1] * (65536) + $ar1[2] * (256) + $ar1[3];

      $ar2 = explode(".",$ip2);
      $var2 = $ar2[0] * (16777216) + $ar2[1] * (65536) + $ar2[2] * (256) + $ar2[3];
      return($var1 < $var2);
    }
  }


  /* \brief Check if the specified IP address $address is inside the given network */
  public static function is_in_network($network, $netmask, $address)
  {
    $nw= explode('.', $network);
    $nm= explode('.', $netmask);
    $ad= explode('.', $address);

    /* Generate inverted netmask */
    for ($i= 0; $i<4; $i++){
      $ni[$i]= 255-$nm[$i];
      $la[$i]= $nw[$i] | $ni[$i];
    }

    /* Transform to integer */
    $first= $nw[0] * (16777216) + $nw[1] * (65536) + $nw[2] * (256) + $nw[3];
    $curr=  $ad[0] * (16777216) + $ad[1] * (65536) + $ad[2] * (256) + $ad[3];
    $last=  $la[0] * (16777216) + $la[1] * (65536) + $la[2] * (256) + $la[3];

    return ($first < $curr&& $last > $curr);
  }

  /* Check if entry value is a valid date */
  public static function is_date($date)
  {
    global $lang;

    if ($date == ""){
      return (TRUE);
    }

    #TODO: use $lang to check date format
    if (!preg_match("/^([0-9]{1,2})\.([0-9]{1,2})\.([0-9]{4})$/", $date, $matches)) {
      return false;
    }

    return checkdate($matches[2],$matches[1],$matches[3]);
  }

  /* Check if entry value is a valid date */
  public static function is_iso8601_date($date)
  {
    global $lang;

    if ($date == ""){
      return (TRUE);
    }

    if (!preg_match("/^(\d{4})-(\d{2})-(\d{2})$/", $date, $matches)) {
      return false;
    }

    return checkdate($matches[2],$matches[3],$matches[1]);
  }

  /*
   * Compares two dates
   * @param $dataA as String in german dateformat
   * @param $dataB as String in german dateformat
   * @return float or false on error
   * 
   * * <0 => a<b
   * 0 => a=b
   * >0 => a>b
   */
 public static function compareDate($dateA, $dateB){
	 /*
	  * TODO:
	  * use $lang to check date format	
	  */ 
 	$tstampA = strtotime($dateA);
 	if($tstampA === false){
 		trigger_error("Given date can not be converted to timestamp(".$dataA.") in function tests::compareDate.");
 		return false;	
 	}
 	$tstampB = strtotime($dateB);
 	if($tstampB === false){
 		trigger_error("Given date can not be converted to timestamp(".$dataB.") in function tests::compareDate.");
 		return false;	
 	}
 	
	return $tstampA-$tstampB;
 }
  /* \brief Check if the specified IP address $address is inside the given network */
  public static function is_in_ip_range($from, $to, $address)
  {
    $from = explode('.', $from);
    $to   = explode('.', $to);
    $ad   = explode('.', $address);

    /* Transform to integer */
    $from= $from[0] * (16777216) + $from[1] * (65536) + $from[2] * (256) + $from[3];
    $to=  $to[0] * (16777216) + $to[1] * (65536) + $to[2] * (256) + $to[3];
    $ad=  $ad[0] * (16777216) + $ad[1] * (65536) + $ad[2] * (256) + $ad[3];

    return ($ad >= $from && $ad <= $to);
  }
}

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?>