<?php

/*
    Copyright (C) 2014-2016 Deciso B.V.
    Copyright (C) 2003-2004 Bob Zoller <bob@kludgebox.com> and Manuel Kasper <mk@neon1.net>.
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
*/

require_once("guiconfig.inc");
require_once("services.inc");
require_once("interfaces.inc");

function hostcmp($a, $b)
{
    return strcasecmp($a['host'], $b['host']);
}

if (empty($config['dnsmasq']['hosts']) || !is_array($config['dnsmasq']['hosts'])) {
    $config['dnsmasq']['hosts'] = array();
}

$a_hosts = &$config['dnsmasq']['hosts'];

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    if (isset($_GET['id']) && !empty($a_hosts[$_GET['id']])) {
        $id = $_GET['id'];
    }
    $config_copy_fieldnames = array('host', 'domain', 'ip', 'descr', 'aliases');
    foreach ($config_copy_fieldnames as $fieldname) {
        if (isset($id) && isset($a_hosts[$id][$fieldname])) {
            $pconfig[$fieldname] = $a_hosts[$id][$fieldname];
        } else {
            $pconfig[$fieldname] = null;
        }
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_POST['id']) && !empty($a_hosts[$_POST['id']])) {
        $id = $_POST['id'];
    }
    $input_errors = array();
    $pconfig = $_POST;

    $pconfig['aliases'] =  array();
    if (isset($pconfig['aliases_host'])) {
        $pconfig['aliases']['item'] = array();
        foreach ($pconfig['aliases_host'] as $opt_seq => $opt_host) {
            if (!empty($opt_host)) {
                $pconfig['aliases']['item'][] = array('host' => $opt_host,
                                                      'domain' => $pconfig['aliases_domain'][$opt_seq],
                                                      'description' => $pconfig['aliases_description'][$opt_seq]
                                                      );
            }
        }
    }

    /* input validation */
    $reqdfields = explode(" ", "domain ip");
    $reqdfieldsn = array(gettext("Domain"),gettext("IP address"));

    do_input_validation($pconfig, $reqdfields, $reqdfieldsn, $input_errors);

    if (!empty($pconfig['host']) && !is_hostname($pconfig['host'])) {
        $input_errors[] = gettext("The hostname can only contain the characters A-Z, 0-9 and '-'.");
    }
    if (!empty($pconfig['domain']) && !is_domain($pconfig['domain'])) {
        $input_errors[] = gettext("A valid domain must be specified.");
    }

    if (!empty($pconfig['ip']) && !is_ipaddr($pconfig['ip'])) {
        $input_errors[] = gettext("A valid IP address must be specified.");
    }


    /* validate aliases */
    foreach ($pconfig['aliases']['item'] as $idx => $alias) {
        $aliasreqdfields = array('domain');
        $aliasreqdfieldsn = array(gettext("Alias Domain"));

        do_input_validation($alias, $aliasreqdfields, $aliasreqdfieldsn, $input_errors);
        if (!empty($alias['host']) && !is_hostname($alias['host'])) {
            $input_errors[] = gettext("Hostnames in alias list can only contain the characters A-Z, 0-9 and '-'.");
        }
        if (!empty($alias['domain']) && !is_domain($alias['domain'])) {
            $input_errors[] = gettext("A valid domain must be specified in alias list.");
        }
    }

    /* check for overlaps */
    foreach ($a_hosts as $hostent) {
        if (isset($id) && $a_hosts[$id] === $hostent) {
            continue;
        }
        if (($hostent['host'] == $pconfig['host']) && ($hostent['domain'] == $pconfig['domain'])
          && ((is_ipaddrv4($hostent['ip']) && is_ipaddrv4($pconfig['ip'])) || (is_ipaddrv6($hostent['ip']) && is_ipaddrv6($pconfig['ip'])))) {
            $input_errors[] = gettext("This host/domain already exists.");
            break;
        }
    }

    if (count($input_errors) == 0) {
        $hostent = array();
        $hostent['host'] = $pconfig['host'];
        $hostent['domain'] = $pconfig['domain'];
        $hostent['ip'] = $pconfig['ip'];
        $hostent['descr'] = $pconfig['descr'];
        $hostent['aliases'] = $pconfig['aliases'];

        if (isset($id)) {
            $a_hosts[$id] = $hostent;
        } else {
            $a_hosts[] = $hostent;
        }
        usort($config['dnsmasq']['hosts'], "hostcmp");
        mark_subsystem_dirty('hosts');
        write_config();
        header("Location: services_dnsmasq.php");
        exit;
    }
}

$service_hook = 'dnsmasq';
legacy_html_escape_form_data($pconfig);
include("head.inc");
?>

<body>
<?php include("fbegin.inc"); ?>
<script type="text/javascript">
  $( document ).ready(function() {
    /**
     *  Aliases
     */
    function removeRow() {
        if ( $('#aliases_table > tbody > tr').length == 1 ) {
            $('#aliases_table > tbody > tr:last > td > input').each(function(){
              $(this).val("");
            });
        } else {
            $(this).parent().parent().remove();
        }
    }
    // add new detail record
    $("#addNew").click(function(){
        // copy last row and reset values
        $('#aliases_table > tbody').append('<tr>'+$('#aliases_table > tbody > tr:last').html()+'</tr>');
        $('#aliases_table > tbody > tr:last > td > input').each(function(){
          $(this).val("");
        });
        $(".act-removerow").click(removeRow);
    });
    $(".act-removerow").click(removeRow);
  });
</script>

<section class="page-content-main">
  <div class="container-fluid">
    <div class="row">
      <?php if (isset($input_errors) && count($input_errors) > 0) print_input_errors($input_errors); ?>
      <section class="col-xs-12">
        <div class="content-box">
          <form method="post" name="iform" id="iform">
            <div class="table-responsive">
              <table class="table table-striped">
                <tr>
                  <td width="22%"><strong><?=gettext("Edit DNS Forwarder entry");?></strong></td>
                  <td width="78%" align="right">
                    <small><?=gettext("full help"); ?> </small>
                    <i class="fa fa-toggle-off text-danger"  style="cursor: pointer;" id="show_all_help_page" type="button"></i>
                  </td>
                </tr>
                <tr>
                  <td><a id="help_for_host" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Host");?></td>
                  <td>
                    <input name="host" type="text" id="host" value="<?=$pconfig['host'];?>" />
                    <div class="hidden" for="help_for_host">
                      <?=gettext("Name of the host, without"." domain part"); ?><br />
                      <?=gettext("e.g."); ?> <em><?=gettext("myhost"); ?></em>
                    </div>
                  </td>
                </tr>
                <tr>
                  <td><a id="help_for_domain" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Domain");?></td>
                  <td>
                    <input name="domain" type="text" id="domain" value="<?=$pconfig['domain'];?>" />
                    <div class="hidden" for="help_for_domain">
                      <?=gettext("Domain of the host"); ?><br />
                      <?=gettext("e.g."); ?> <em><?=gettext("example.com"); ?></em>
                    </div>
                  </td>
                </tr>
                <tr>
                  <td><a id="help_for_ip" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("IP address");?></td>
                  <td>
                    <input name="ip" type="text" id="ip" value="<?=$pconfig['ip'];?>" />
                    <div class="hidden" for="help_for_ip">
                      <?=gettext("IP address of the host"); ?><br />
                      <?=gettext("e.g."); ?> <em>192.168.100.100</em> <?=gettext("or"); ?> <em>fd00:abcd::1</em><
                    </div>
                  </td>
                </tr>
                <tr>
                  <td><a id="help_for_descr" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Description");?></td>
                  <td>
                    <input name="descr" type="text" id="descr" value="<?=$pconfig['descr'];?>" />
                    <div class="hidden" for="help_for_descr">
                      <?=gettext("You may enter a description here"." for your reference (not parsed).");?>
                    </div>
                  </td>
                </tr>
                <tr>
                  <td><a id="help_for_alias" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Aliases"); ?></td>
                  <td>
                    <table class="table table-striped table-condensed" id="aliases_table">
                      <thead>
                        <tr>
                          <th></th>
                          <th id="detailsHeading1"><?=gettext("Host"); ?></th>
                          <th id="detailsHeading3"><?=gettext("Domain"); ?></th>
                          <th id="updatefreqHeader" ><?=gettext("Description");?></th>
                        </tr>
                      </thead>
                      <tbody>
<?php
                      if (empty($pconfig['aliases']['item'])) {
                          $aliases = array();
                          $aliases[] = array('number' => null, 'value' => null, 'type' => null);
                      } else {
                          $aliases = $pconfig['aliases']['item'];
                      }
                      foreach($aliases as $item):?>
                        <tr>
                          <td>
                            <div style="cursor:pointer;" class="act-removerow btn btn-default btn-xs" alt="remove"><span class="glyphicon glyphicon-minus"></span></div>
                          </td>
                          <td>
                            <input name="aliases_host[]" type="text" value="<?=$item['host'];?>" />
                          </td>
                          <td>
                            <input name="aliases_domain[]" type="text" value="<?=$item['domain'];?>" />
                          </td>
                          <td>
                            <input name="aliases_description[]" type="text" value="<?=$item['description'];?>" />
                          </td>
                        </tr>
<?php
                      endforeach;?>
                      </tbody>
                      <tfoot>
                        <tr>
                          <td colspan="4">
                            <div id="addNew" style="cursor:pointer;" class="btn btn-default btn-xs" alt="add"><span class="glyphicon glyphicon-plus"></span></div>
                          </td>
                        </tr>
                      </tfoot>
                    </table>
                    <div class="hidden" for="help_for_alias">
                      <?=gettext("Enter additional names for this host."); ?>
                    </div>
                  </td>
                </tr>
                <tr>
                  <td>&nbsp;</td>
                  <td>
                    <input name="Submit" type="submit" class="btn btn-primary" value="<?=gettext("Save");?>" />
                    <input type="button" class="btn btn-default" value="<?=gettext("Cancel");?>" onclick="window.location.href='<?=(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/services_dnsmasq.php');?>'" />
                    <?php if (isset($id)): ?>
                    <input name="id" type="hidden" value="<?=htmlspecialchars($id);?>" />
                    <?php endif; ?>
                  </td>
                </tr>
              </table>
            </div>
          </form>
        </div>
      </section>
    </div>
  </div>
</section>

<?php include("foot.inc"); ?>
