<?php

/*
 * Copyright (C) 2014-2015 Deciso B.V.
 * Copyright (C) 2010 Seth Mos <seth.mos@dds.nl>
 * 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");

$a_gateway_groups = &config_read_array('gateways', 'gateway_group');
$a_gateways = (new \OPNsense\Routing\Gateways(legacy_interfaces_details()))->gatewaysIndexedByName();

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    if (isset($_GET['id']) && isset($a_gateway_groups[$_GET['id']])) {
        $id = $_GET['id'];
        $configId = $id;
    } elseif (isset($_GET['dup']) && isset($a_gateway_groups[$_GET['dup']])) {
        $configId = $_GET['dup'];
    }
    $pconfig = [];
    if (isset($configId)) {
        $pconfig['name'] = $a_gateway_groups[$configId]['name'];
        $pconfig['item'] = &$a_gateway_groups[$configId]['item'];
        $pconfig['descr'] = $a_gateway_groups[$configId]['descr'];
        $pconfig['trigger'] = $a_gateway_groups[$configId]['trigger'];
    } else {
        $pconfig['name'] = null;
        $pconfig['descr'] = null;
        $pconfig['trigger'] = null;
        $pconfig['item'] = array();
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $pconfig = $_POST;
    if (isset($_POST['id']) && isset($a_gateway_groups[$_POST['id']])) {
        $id = $_POST['id'];
    }

    $input_errors = array();
    /* input validation */
    $reqdfields = explode(" ", "name");
    $reqdfieldsn = explode(",", "Name");

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

    if (empty($pconfig['name'])) {
        $input_errors[] = gettext("A valid gateway group name must be specified.");
    } elseif (!isset($id) && !preg_match('/^[a-zA-Z0-9_\-]{1,32}$/', $pconfig['name'])) {
        $input_errors[] = sprintf(gettext('The name must be less than 32 characters long and may only consist of the following characters: %s'), 'a-z, A-Z, 0-9, _');
    }

    if (!empty($pconfig['name'])) {
        /* check for overlaps */
        if (is_array($a_gateway_groups)) {
            foreach ($a_gateway_groups as $gateway_group) {
                if (isset($id) && ($a_gateway_groups[$id]) && ($a_gateway_groups[$id] === $gateway_group)) {
                    if ($gateway_group['name'] != $pconfig['name']) {
                        $input_errors[] = gettext("Changing name on a gateway group is not allowed.");
                    }
                    continue;
                }

                if ($gateway_group['name'] == $pconfig['name']) {
                    $input_errors[] = sprintf(gettext('A gateway group with this name "%s" already exists.'), $pconfig['name']);
                    break;
                }
            }
        }
    }

    /* Build list of items in group with priority */
    $pconfig['item'] = array();
    foreach ($a_gateways as $gwname => $gateway) {
        if (isset($pconfig[$gwname]) && $pconfig[$gwname] > 0) {
            /* we have a priority above 0 (disabled), add item to list */
            $pconfig['item'][] = "{$gwname}|{$pconfig[$gwname]}";
        }
        /* check for overlaps */
        if ($pconfig['name'] == $gwname) {
            $input_errors[] = sprintf(gettext('A gateway group cannot have the same name with a gateway "%s" please choose another name.'), $pconfig['name']);
        }

    }
    if (count($pconfig['item']) == 0) {
        $input_errors[] = gettext("No gateway(s) have been selected to be used in this group");
    }

    if (count($input_errors) == 0) {
        $gateway_group = array();
        $gateway_group['name'] = $pconfig['name'];
        $gateway_group['item'] = $pconfig['item'];
        $gateway_group['trigger'] = $pconfig['trigger'];
        $gateway_group['descr'] = $pconfig['descr'];

        if (isset($id)) {
            $a_gateway_groups[$id] = $gateway_group;
        } else {
            $a_gateway_groups[] = $gateway_group;
        }

        mark_subsystem_dirty('gwgroups');
        write_config();

        header(url_safe('Location: /system_gateway_groups.php'));
        exit;
    }
}

legacy_html_escape_form_data($a_gateways);
legacy_html_escape_form_data($pconfig);

include("head.inc");

?>

<script>
$( document ).ready(function() {
    // force protocol on initial selection (only relevant for new items)
    $("select.act-tier-change").change(function(){
      var proto = $(this).data('proto');
      $("select.act-tier-change").each(function(){
            if ($(this).data('proto') != proto) {
                $(this).val('0');
            }
      });
      $('.selectpicker').selectpicker('refresh');
    });
});
</script>
<body>
<?php include("fbegin.inc"); ?>
  <section class="page-content-main">
    <div class="container-fluid">
      <div class="row">
<?php if (isset($input_errors) && count($input_errors) > 0) {
        print_input_errors($input_errors);
} ?>
        <section class="col-xs-12">
          <div class="tab-content content-box col-xs-12">
            <div class="table-responsive">
              <form method="post" name="iform" id="iform">
                <table class="table table-striped opnsense_standard_table_form">
                  <tr>
                    <td style="width:22%"></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>
                    </td>
                  </tr>
                  <tr>
                    <td><i class="fa fa-info-circle text-muted"></i> <?=gettext("Group Name"); ?></td>
                    <td>
                      <input name="name" type="text" size="20" value="<?=$pconfig['name'];?>" />
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_gatewayprio" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Gateway Priority"); ?></td>
                    <td>
                      <table class="table table-condensed">
                        <tr>
                          <td><?= gettext('Gateway') ?></td>
                          <td><?= gettext('Tier') ?></td>
                          <td><?= gettext('Description') ?></td>
                        </tr>
<?php
                        foreach ($a_gateways as $gwname => $gateway):?>
                        <tr>
                          <td><strong><?=$gateway['name'];?></strong></td>
                          <td>
                            <select name="<?=$gwname;?>" class="selectpicker act-tier-change" data-width='auto' data-proto="<?=$gateway['ipprotocol'];?>">
<?php
                              for ($tierId = 0 ; $tierId < 6 ; ++$tierId):
                                $is_selected = false;
                                foreach ((array)$pconfig['item'] as $item) {
                                    $itemsplit = explode("|", $item);
                                    if ($itemsplit[0] == $gwname && $itemsplit[1] == $tierId) {
                                        $is_selected = true;
                                    }
                                }
?>
                                <option value="<?=$tierId;?>" <?=$is_selected ? "selected=\"selected\"" : "";?>>
                                    <?=$tierId == 0 ? gettext("Never") : sprintf(gettext("Tier %d"), $tierId) ;?>
                                </option>
<?php
                              endfor;?>
                            </select>
                          </td>
                          <td><strong><?=$gateway['descr'];?></strong></td>
                        </tr>
<?php
                        endforeach;?>
                      </table>
                      <div data-for="help_for_gatewayprio" class="hidden">
                          <br>
                          <strong><?=gettext("Link Priority"); ?></strong> <br />
                          <?=gettext("The priority selected here defines in what order failover and balancing of links will be done. " .
                                                  "Multiple links of the same priority will balance connections until all links in the priority will be exhausted. " .
                                                  "If all links in a priority level are exhausted we will use the next available link(s) in the next priority level.") ?>

                          <br />
                          <strong><?=gettext("Virtual IP"); ?></strong> <br />
                          <?=gettext("The virtual IP field selects what (virtual) IP should be used when this group applies to a local Dynamic DNS, IPsec or OpenVPN endpoint") ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_triggerlvl" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Trigger Level"); ?></td>
                    <td>
                      <select name='trigger' class='selectpicker'>
                        <option value="down" <?=$pconfig['trigger'] == "down" ? "selected=\"selected\"" :"";?> ><?=gettext("Member Down");?></option>
                        <option value="downloss" <?=$pconfig['trigger'] == "downloss" ? "selected=\"selected\"" :"";?> ><?=gettext("Packet Loss");?></option>
                        <option value="downlatency" <?=$pconfig['trigger'] == "downlatency" ? "selected=\"selected\"" :"";?> ><?=gettext("High Latency");?></option>
                        <option value="downlosslatency" <?=$pconfig['trigger'] == "downlosslatency" ? "selected=\"selected\"" :"";?> ><?=gettext("Packet Loss or High Latency");?></option>
                      </select>
                      <div data-for="help_for_triggerlvl" class="hidden">
                        <?=gettext("When to trigger exclusion of a member"); ?>
                      </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="<?=$pconfig['descr'];?>" />
                      <div data-for="help_for_descr" class="hidden">
                        <?=gettext("You may enter a description here for your reference (not parsed)."); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td></td>
                    <td>
                      <input name="Submit" type="submit" class="btn btn-primary" value="<?=html_safe(gettext('Save'));?>" />
                      <input type="button" class="btn btn-default" value="<?=html_safe(gettext("Cancel"));?>" onclick="window.location.href='/system_gateway_groups.php'" />
<?php
                      if (isset($id)) :?>
                      <input name="id" type="hidden" value="<?=$id;?>" />
<?php
                      endif; ?>
                    </td>
                  </tr>
                </table>
              </form>
            </div>
          </div>
        </section>
      </div>
    </div>
  </section>
<?php include("foot.inc"); ?>