<?php

/*  PowerAdmin, a friendly web-based admin tool for PowerDNS.

 *  See <https://rejo.zenger.nl/poweradmin> for more details.

 *

 *  Copyright 2007, 2008  Rejo Zenger <rejo@zenger.nl>

 *

 *  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 3 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, see <http://www.gnu.org/licenses/>.

 */

session_start();

/*************

if (isset($_GET["start"])) {

   define(ROWSTART, (($_GET["start"] - 1) * ROWAMOUNT));

   } else {

   define(ROWSTART, 0);

}

if (isset($_GET["letter"])) {

   define(LETTERSTART, $_GET["letter"]);

   $_SESSION["letter"] = $_GET["letter"];

} elseif(isset($_SESSION["letter"])) {

   define(LETTERSTART, $_SESSION["letter"]);

} else {

   define(LETTERSTART, "a");

}

/* Database connection */

require_once("database.inc.php");

// Generates $db variable to access database.

// Array of the available zone types

$server_types = array("MASTER", "SLAVE", "NATIVE");

/*************

 * Includes  *

 *************/

require_once("error.inc.php");

require_once("auth.inc.php");

require_once("i18n.inc.php");

require_once("users.inc.php");

require_once("dns.inc.php");

require_once("record.inc.php");

/*************

 * Functions *

 *************/

/*

 * Display the page option: [1] [2] .. [n]

 */

function show_pages($amount,$rowamount,$id='')

{

   if ($amount > $rowamount) {

      if (!isset($_GET["start"])) $_GET["start"]=1;

      echo _('Show page') . "<br>";

      for ($i=1;$i<=ceil($amount / $rowamount);$i++) {

         if ($_GET["start"] == $i) {

            echo "[ <b>".$i."</b> ] ";

         } else {

            echo "[ <a href=\"".$_SERVER["PHP_SELF"]."?start=".$i;

	    if ($id!='') echo "&id=".$id;

	    echo "\">".$i."</a> ] ";

         }

      }

   }

}

/*

 * Display the alphabetic option: [0-9] [a] [b] .. [z]

 */

function show_letters($letterstart,$userid=true)

{

        echo _('Show zones beginning with:') . "<br>";

	$letter = "[[:digit:]]";

	if ($letterstart == "0")

	{

		echo "[ <span class=\"lettertaken\">0-9</span> ] ";

	}

	elseif (zone_letter_start($letter,$userid))

	{

		echo "[ <a href=\"".$_SERVER["PHP_SELF"]."?letter=1\">0-9</a> ] ";

	}

	else

	{

		echo "[ <span class=\"letternotavailble\">0-9</span> ] ";

	}

        foreach (range('a','z') as $letter)

        {

                if ($letter == $letterstart)

                {

                        echo "[ <span class=\"lettertaken\">".$letter."</span> ] ";

                }

                elseif (zone_letter_start($letter,$userid))

                {

                        echo "[ <a href=\"".$_SERVER["PHP_SELF"]."?letter=".$letter."\">".$letter."</a> ] ";

                }

                else

                {

                        echo "[ <span class=\"letternotavailble\">".$letter."</span> ] ";

                }

        }

}

function zone_letter_start($letter,$userid=true)

{

        global $db;

	global $sql_regexp;

        $sqlq = "SELECT domains.id AS domain_id,

        zones.owner,

        records.id,

        domains.name AS domainname

        FROM domains

        LEFT JOIN zones ON domains.id=zones.domain_id 

        LEFT JOIN records ON records.domain_id=domains.id

        WHERE 1=1";

        if((!level(5) || !$userid) && !level(10) && !level(5))

        {

		// First select the zones for which we have ownership on one or more records.

		$query = 'SELECT records.domain_id FROM records, record_owners WHERE user_id = '.$db->quote($_SESSION['userid']).' AND records.id = record_owners.record_id';

		$result = $db->query($query);

		$zones = array();

		if (!PEAR::isError($result)) {

			$zones = $result->fetchCol();

		}

                $sqlq .= " AND (zones.owner=".$db->quote($_SESSION["userid"]);

		if (count($zones) > 0) {

			$sqlq .= ' OR zones.domain_id IN ('.implode(',', $zones).') '; 

		}

		$sqlq .= ')';

        }

        $sqlq .= " AND substring(domains.name,1,1) ".$sql_regexp." ".$db->quote("^".$letter);

		$db->setLimit(1);

        $result = $db->query($sqlq);

        $numrows = $result->numRows();

        if ( $numrows == "1" ) 

        {

                return 1;

        }

        else

        {

                return 0;

        }

}

/*

 * Print a nice useraimed error.

 */

function error($msg)

{

	// General function for printing critical errors.

	if ($msg)

	{

		include_once("header.inc.php");

	?>

	<p><?php echo _('Oops! An error occured!'); ?></p>

	<p><?php echo nl2br($msg) ?></p>

	<?php

		include_once("footer.inc.php");

		die();

	}

	else

	{

		include_once("footer.inc.php");

		die("No error specified!");

	}

}

/*

 * Something has been done nicely, display a message and a back button.

 */

function message($msg)

{

    include_once("header.inc.php");

    ?>

    <P><TABLE CLASS="messagetable"><TR><TD CLASS="message"><H2><?php echo _('Success!'); ?></H2>

    <BR>

	<FONT STYLE="font-weight: Bold">

	<P>

	<?php

    if($msg)

    {

        echo nl2br($msg);

    }

    else

    {

        echo _('Successful!');

    }

    ?>

    </P>

    <BR>

    <P>

    <a href="javascript:history.go(-1)">&lt;&lt; <?php echo _('back'); ?></a></FONT>

    </P>

    </TD></TR></TABLE></P>

    <?php

    include_once("footer.inc.php");

}

/*

 * Reroute a user to a cleanpage of (if passed) arg

 */

function clean_page($arg='')

{

	if (!$arg)

	{

		header("Location: ".$_SERVER["PHP_SELF"]."?time=".time());

		exit;

	}

	else

	{

		if (preg_match('!\?!si', $arg))

		{

			$add = "&time=";

		}

		else

		{

			$add = "?time=";

		}

		header("Location: $arg$add".time());

		exit;

	}

}

function level($l)

{

	if ($_SESSION["level"] >= $l)

	{

		return 1;

	}

	else

	{

		return 0;

	}

}

function xs($zoneid)

{

	global $db;

	if (is_numeric($zoneid) && is_numeric($_SESSION["level"]))

	{

		$result = $db->query("SELECT id FROM zones WHERE owner=".$db->quote($_SESSION["userid"])." AND domain_id=".$db->quote($zoneid));

		$db->setLimit(1);

		$result_extra = $db->query("SELECT record_owners.id FROM record_owners,records WHERE record_owners.user_id=".$db->quote($_SESSION["userid"])." AND records.domain_id = ".$db->quote($zoneid)." AND records.id = record_owners.record_id");

                if ($result->numRows() == 1 || $_SESSION["level"] >= 5)

                {

			$_SESSION[$zoneid."_ispartial"] = 0;

			return true;

		}

		elseif ($result_extra->numRows() == 1)

		{

			$_SESSION[$zoneid."_ispartial"] = 1;

			return true;

		}

		else

		{

			return false;

		}

	}

	else

	{

        	return false;

        }

}

function get_status($res)

{

	if ($res == '0')

	{

		return "<FONT CLASS=\"inactive\">" . _('Inactive') . "</FONT>";

	}

	elseif ($res == '1')

	{

		return "<FONT CLASS=\"active\">" . _('Active') . "</FONT>";

	}

}

function parse_template_value($val, $domain, $webip, $mailip)

{

	$val = str_replace('##DOMAIN##', $domain, $val);

	$val = str_replace('##WEBIP##', $webip, $val);

	$val = str_replace('##MAILIP##', $mailip, $val);

	return $val;

}

/*

 * Validates an email address.

 * Checks if there is something before the at '@' sign and its followed by a domain and a tld of minimum 2

 * and maximum of 4 characters.

 */

function is_valid_email($email)

{

	if(!eregi("^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.([a-z]{2,6}$)", $email))

	{

		return false;

	}

	return true;

}

?>