<?php

/*
 * Copyright (C) 2014-2015 Deciso B.V.
 * Copyright (C) 2009 Ermal Luçi
 * Copyright (C) 2004 Scott Ullrich <sullrich@gmail.com>
 * 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("interfaces.inc");
require_once("filter.inc");

$a_ifgroups = &config_read_array('ifgroups', 'ifgroupentry');

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    // read form data
    if (!empty($a_ifgroups[$_GET['id']])) {
        $id = $_GET['id'];
    }
    $pconfig = array();
    $pconfig['ifname'] = isset($a_ifgroups[$id]['ifname']) ? $a_ifgroups[$id]['ifname'] : null;
    $pconfig['descr'] = isset($a_ifgroups[$id]['descr']) ?  $a_ifgroups[$id]['descr'] : null;
    $pconfig['members'] = isset($a_ifgroups[$id]['members']) ? explode(' ', $a_ifgroups[$id]['members']) : array();
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // validate and save form data
    if (!empty($a_ifgroups[$_POST['id']])) {
        $id = $_POST['id'];
    }
    $input_errors = array();
    $pconfig = $_POST;

    if (!isset($id)) {
        foreach ($a_ifgroups as $groupentry) {
            if ($groupentry['ifname'] == $pconfig['ifname']) {
                $input_errors[] = gettext("Group name already exists!");
            }
        }
    }

    if (empty($pconfig['ifname']) || preg_match('/[^a-zA-Z0-9_]+/', $pconfig['ifname'], $match)) {
        $input_errors[] = gettext('Only letters, digits and underscores are allowed as the group name.');
    }

    if (!empty($pconfig['ifname'])) {
        if (strlen($pconfig['ifname']) > 15) {
            $input_errors[] = gettext('The group name shall not be longer than 15 characters.');
        }

        if (preg_match('/[0-9]$/', $pconfig['ifname'], $match)) {
            $input_errors[] = gettext('The group name shall not end in a digit.');
        }
    }

    foreach (get_configured_interface_with_descr() as $gif => $gdescr) {
        if ($gdescr == $pconfig['ifname'] || $gif == $pconfig['ifname']) {
            $input_errors[] = gettext("The specified group name is already used by an interface. Please choose another name.");
        }
    }

    if (empty($pconfig['members'])) {
        $input_errors[] = gettext("At least one group member must be specified.");
        $pconfig['members'] = array();
    }

    if (count($input_errors) == 0) {
      $ifgroupentry = array();
      $ifgroupentry['members'] = implode(' ', $pconfig['members']);
      $ifgroupentry['descr'] = $pconfig['descr'];
      $ifgroupentry['ifname'] = $pconfig['ifname'];

      if (isset($id)) {
          // rename interface group
          if ($pconfig['ifname'] != $a_ifgroups[$id]['ifname']) {
              if (!empty($config['filter']) && is_array($config['filter']['rule'])) {
                  foreach ($config['filter']['rule'] as &$rule) {
                        $rule_ifs = explode(",", $rule['interface']);
                        if (in_array($a_ifgroups[$id]['ifname'], $rule_ifs)) {
                            // replace interface
                            $rule_ifs[array_search($a_ifgroups[$id]['ifname'], $rule_ifs)] = $ifgroupentry['ifname'];
                            $rule['interface'] = implode(",", $rule_ifs);
                        }
                    }
              }
              if (!empty($config['nat']) && is_array($config['nat']['rule'])) {
                  foreach ($config['nat']['rule'] as &$rule) {
                      $rule_ifs = explode(",", $rule['interface']);
                      if (in_array($a_ifgroups[$id]['ifname'], $rule_ifs)) {
                          // replace interface
                          $rule_ifs[array_search($a_ifgroups[$id]['ifname'], $rule_ifs)] = $ifgroupentry['ifname'];
                          $rule['interface'] = implode(",", $rule_ifs);
                      }
                  }
              }
          }
          // update item
          $a_ifgroups[$id] = $ifgroupentry;
      } else {
          // add new item
          $a_ifgroups[] = $ifgroupentry;
      }
      mark_subsystem_dirty('filter');
      usort($a_ifgroups, function($a, $b) {
          return strnatcmp($a['ifname'], $b['ifname']);
      });
      filter_rules_sort();
      write_config();
      header(url_safe('Location: /interfaces_groups.php'));
      exit;
    }
}


include("head.inc");
legacy_html_escape_form_data($pconfig);
?>

<body>
<?php include("fbegin.inc"); ?>

<section class="page-content-main">
  <div class="container-fluid">
    <div class="row">
      <?php if (isset($input_errors) && count($input_errors) > 0) print_input_errors($input_errors); ?>
      <section class="col-xs-12">
        <div class="content-box">
          <div class="table-responsive">
            <form method="post" name="iform" id="iform">
              <table class="table table-striped opnsense_standard_table_form">
                <thead>
                  <tr>
                    <td style="width:22%"><strong><?=gettext("Interface Groups Edit");?></strong></td>
                    <td style="width:78%; text-align:right">
                      <small><?=gettext("full help"); ?> </small>
                      <i class="fa fa-toggle-off text-danger"  style="cursor: pointer;" id="show_all_help_page"></i>
                      &nbsp;
                    </td>
                  </tr>
                </thead>
                <tbody>
                  <tr>
                    <td><a id="help_for_ifname" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?= gettext('Name') ?></td>
                    <td>
                      <input type="text" name="ifname" value="<?=$pconfig['ifname'];?>" />
                      <div class="hidden" data-for="help_for_ifname">
                        <?=gettext("No numbers or spaces are allowed. Only characters in a-zA-Z");?>
                      </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" value="<?=$pconfig['descr'];?>" />
                      <div class="hidden" data-for="help_for_descr">
                        <?= gettext('You may enter a description here for your reference.') ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_members" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?= gettext('Members') ?></td>
                    <td>
                        <select name="members[]" multiple="multiple" class="selectpicker" data-size="5" data-live-search="true">
<?php
                        foreach (legacy_config_get_interfaces() as $ifn => $ifdetail):
                          if (!empty($ifdetail['type']) && $ifdetail['type'] == 'group') {
                              continue;
                          }
                          ?>
                          <option value="<?=$ifn;?>" <?=in_array($ifn, $pconfig['members']) ? "selected=\"selected\"" : "";?>>
                            <?= htmlspecialchars($ifdetail['descr']) ?>
                          </option>
<?php
                        endforeach;?>
                        </select>
                      <div class="hidden" data-for="help_for_members">
                        <?= gettext('Rules for WAN type interfaces in groups do not contain the reply-to mechanism upon which Multi-WAN typically relies.') ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td>&nbsp;</td>
                    <td>
                      <input name="submit" type="submit" class="btn btn-primary" value="<?=html_safe(gettext('Save'));?>" />
                      <input type="button" class="btn btn-default" value="<?=html_safe(gettext('Cancel'));?>" onclick="window.location.href='/interfaces_groups.php'" />
                      <?php if (isset($id)): ?>
                      <input name="id" type="hidden" value="<?=$id;?>" />
                      <?php endif; ?>
                    </td>
                  </tr>
                </tbody>
              </table>
            </form>
          </div>
        </div>
      </section>
    </div>
  </div>
</section>
<?php
include("foot.inc");