<?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");
require_once("filter.inc");
require_once("services.inc");
require_once("system.inc");
require_once("rrd.inc");

/**
 * check if gateway_item can be deleted
 * @param int $id sequence item in $a_gateways
 * @param array $a_gateways gateway list
 * @param array $input_errors input errors
 * @return bool has errors
 */
function can_delete_gateway_item($id, $a_gateways, &$input_errors)
{
    global $config;

    if (!isset($a_gateways[$id])) {
        return false;
    }

    if (isset($config['gateways']['gateway_group'])) {
        foreach ($config['gateways']['gateway_group'] as $group) {
            foreach ($group['item'] as $item) {
                $items = explode("|", $item);
                if ($items[0] == $a_gateways[$id]['name']) {
                    $input_errors[] = sprintf(gettext("Gateway '%s' cannot be deleted because it is in use on Gateway Group '%s'"), $a_gateways[$id]['name'], $group['name']);
                    break;
                }
            }
        }
    }

    if (isset($config['staticroutes']['route'])) {
        foreach ($config['staticroutes']['route'] as $route) {
            if ($route['gateway'] == $a_gateways[$id]['name']) {
                $input_errors[] = sprintf(gettext("Gateway '%s' cannot be deleted because it is in use on Static Route '%s'"), $a_gateways[$id]['name'], $route['network']);
                break;
            }
        }
    }

    if (isset($input_errors) && count($input_errors) > 0) {
        return false;
    }

    return true;
}
/**
 * delete gateway
 * @param int $id sequence item in $a_gateways
 * @param array $a_gateways gateway list
 */
function delete_gateway_item($id, $a_gateways)
{
    global $config;

    if (!isset($a_gateways[$id])) {
        return;
    }

    /* NOTE: Cleanup static routes for the monitor ip if any */
    if (!empty($a_gateways[$id]['monitor']) &&
        $a_gateways[$id]['monitor'] != "dynamic" &&
        is_ipaddr($a_gateways[$id]['monitor']) &&
        $a_gateways[$id]['gateway'] != $a_gateways[$id]['monitor']) {
        if (is_ipaddrv4($a_gateways[$id]['monitor'])) {
            mwexec("/sbin/route delete " . escapeshellarg($a_gateways[$id]['monitor']));
        } else {
            mwexec("/sbin/route delete -inet6 " . escapeshellarg($a_gateways[$id]['monitor']));
        }
    }

    if ($config['interfaces'][$a_gateways[$id]['friendlyiface']]['gateway'] == $a_gateways[$id]['name']) {
        unset($config['interfaces'][$a_gateways[$id]['friendlyiface']]['gateway']);
    }
    unset($config['gateways']['gateway_item'][$a_gateways[$id]['attribute']]);
}


// fetch gateways and let's pretend the order is safe to use...
$a_gateways = return_gateways_array(true, false, true);
$a_gateways_arr = array();
foreach ($a_gateways as $gw) {
    $a_gateways_arr[] = $gw;
}
$a_gateways = $a_gateways_arr;

// form processing
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $pconfig = $_POST;
    $input_errors = array();
    if (isset($pconfig['id']) && isset($a_gateways[$pconfig['id']])) {
        // id found and valid
        $id = $pconfig['id'];
    }
    if (isset($pconfig['apply'])) {
        // apply changes, reconfigure
        $retval = 0;
        $retval = system_routing_configure();
        filter_configure();
        /* reconfigure our gateway monitor */
        setup_gateways_monitor();
        if ($retval == 0) {
            clear_subsystem_dirty('staticroutes');
        }
        header(url_safe('Location: /system_gateways.php?displaysave=true'));
        exit;
    } elseif (isset($id) && isset($pconfig['act']) && $pconfig['act'] == "del") {
        // delete single entry
        $input_errors = array();
        if (can_delete_gateway_item($id, $a_gateways, $input_errors)) {
            $realid = $a_gateways[$id]['attribute'];
            delete_gateway_item($id, $a_gateways);
            write_config("Gateways: removed gateway {$realid}");
            mark_subsystem_dirty('staticroutes');
            header(url_safe('Location: /system_gateways.php'));
            exit;
        }
    } elseif (isset($id) && isset($pconfig['act']) && $pconfig['act'] == "toggle") {
        // Toggle active/in-active
        $realid = $a_gateways[$id]['attribute'];
        if (!is_array($config['gateways'])) {
            $config['gateways'] = array();
        }
        if (!is_array($config['gateways']['gateway_item'])) {
            $config['gateways']['gateway_item'] = array();
        }
        $a_gateway_item = &$config['gateways']['gateway_item'];

        if (isset($a_gateway_item[$realid]['disabled'])) {
            unset($a_gateway_item[$realid]['disabled']);
        } else {
            $a_gateway_item[$realid]['disabled'] = true;
        }

        write_config('Gateways: toggled gateway');
        mark_subsystem_dirty('staticroutes');

        header(url_safe('Location: /system_gateways.php'));
        exit;
    } elseif (!empty($pconfig['rule']) && isset($pconfig['act']) && $pconfig['act'] == "del_x") {
        // delete selected items
        $input_errors = array();
        if (is_array($pconfig['rule']) && count($pconfig['rule'])) {
            foreach ($pconfig['rule'] as $rulei) {
                if (!can_delete_gateway_item($rulei, $a_gateways, $input_errors)) {
                    break;
                }
            }

            if (count($input_errors) == 0) {
                $items_deleted = "";
                foreach ($_POST['rule'] as $rulei) {
                    delete_gateway_item($rulei, $a_gateways);
                    $items_deleted .= "{$rulei} ";
                }
                if (!empty($items_deleted)) {
                    write_config("Gateways: removed gateways {$items_deleted}");
                    mark_subsystem_dirty('staticroutes');
                }
                header(url_safe('Location: /system_gateways.php'));
                exit;
            }
        }
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET') {
    // set save message
    if (!empty($_GET['displaysave'])) {
        $savemsg = get_std_save_message();
    }
}

legacy_html_escape_form_data($a_gateways);

$service_hook = 'apinger';

include("head.inc");

$main_buttons = array(
    array('label'=> gettext('Add gateway'), 'href'=>'system_gateways_edit.php'),
);

?>

<script type="text/javascript">
$( document ).ready(function() {
  // link delete single item buttons (by class)
  $(".act_delete").click(function(event){
      event.preventDefault();
      var id = $(this).data('id');
      BootstrapDialog.show({
        type:BootstrapDialog.TYPE_DANGER,
        title: "<?= gettext("Gateways");?>",
        message: "<?=gettext("Do you really want to delete this gateway?");?>",
        buttons: [{
                  label: "<?= gettext("No");?>",
                  action: function(dialogRef) {
                      dialogRef.close();
                  }}, {
                  label: "<?= gettext("Yes");?>",
                  action: function(dialogRef) {
                    $("#id").val(id);
                    $("#action").val("del");
                    $("#iform").submit()
                }
              }]
      });
  });

  // link toggle buttons (by class)
  $(".act_toggle").click(function(event){
    event.preventDefault();
    var id = $(this).data('id');
    $("#id").val(id);
    $("#action").val("toggle");
    $("#iform").submit();
  });

  // link delete selected
  $("#btn_delete").click(function(event){
    event.preventDefault();
    var id = $(this).data('id');
    BootstrapDialog.show({
      type:BootstrapDialog.TYPE_DANGER,
      title: "<?= gettext("Gateways");?>",
      message: "<?=gettext("Do you really want to delete the selected gateway items?");?>",
      buttons: [{
                label: "<?= gettext("No");?>",
                action: function(dialogRef) {
                    dialogRef.close();
                }}, {
                label: "<?= gettext("Yes");?>",
                action: function(dialogRef) {
                  $("#action").val("del_x");
                  $("#iform").submit()
              }
            }]
    });
  });
  // watch scroll position and set to last known on page load
  watchScrollPosition();
});
</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($input_errors);
    }
    if (isset($savemsg)) {
        print_info_box($savemsg);
    }
    if (is_subsystem_dirty('staticroutes')) {
        print_info_box_apply(gettext("The gateway configuration has been changed.") . "<br />" . gettext("You must apply the changes in order for them to take effect."));
    }
?>
      <section class="col-xs-12">
        <div class="content-box">
          <div class="table-responsive">
            <form method="post"  name="iform" id="iform">
              <input type="hidden" id="id" name="id" value="" />
              <input type="hidden" id="action" name="act" value="" />
              <table class="table table-striped">
                <thead>
                  <tr>
                    <th colspan="2">&nbsp;</th>
                    <th><?=gettext("Name"); ?></th>
                    <th><?=gettext("Interface"); ?></th>
                    <th><?=gettext("Gateway"); ?></th>
                    <th><?=gettext("Monitor IP"); ?></th>
                    <th><?=gettext("Description"); ?></th>
                    <th></th>
                  </tr>
                </thead>
                <tbody>
<?php
                  $i = 0;
                  foreach ($a_gateways as $gateway) :?>
                    <tr class="<?=isset($gateway['disabled']) || isset($gateway['inactive']) ? "text-muted" : "";?>">
                      <td>
<?php
                    if (is_numeric($gateway['attribute'])) :?>
                      <input type="checkbox" name="rule[]" value="<?=$i;?>"/>
<?php
                    else :?>
                      &nbsp;
<?php
                    endif;?>
                      </td>
                      <td>
<?php
                    if (isset($gateway['inactive'])) :?>
                        <span class="fa fa-trash text-muted" data-toggle="tooltip" title="<?=gettext("Gateway is inactive because interface is missing");?>"></span>
<?php
                    elseif (is_numeric($gateway['attribute'])) :?>
                        <a href="#" class="act_toggle" data-id="<?=$i;?>" data-toggle="tooltip" title="<?=(!isset($gateway['disabled'])) ? gettext("disable gateway") : gettext("enable gateway");?>">
                          <span class="glyphicon glyphicon-play <?=isset($gateway['disabled']) || isset($gateway['inactive']) ? "text-muted" : "text-success";?>"></span>
                        </a>
<?php
                    else :?>
                        <span class="glyphicon glyphicon-play <?=isset($gateway['disabled']) || isset($gateway['inactive']) ? "text-muted" : "text-success";?>" data-toggle="tooltip" title="<?=(!isset($filterent['disabled'])) ? gettext("disable gateway") : gettext("enable gateway");?>"></span>
<?php
                    endif;?>
                      </td>
                      <td>
                        <?=$gateway['name'];?>
                        <?=isset($gateway['defaultgw']) ? "<strong>(default)</strong>" : "";?>
                      </td>
                      <td>
                        <?=convert_friendly_interface_to_friendly_descr($gateway['friendlyiface']);?>
                      </td>
                      <td>
                        <?=$gateway['gateway'];?>
                      </td>
                      <td>
                        <?=$gateway['monitor'];?>
                      </td>
                      <td>
                        <?=$gateway['descr'];?>
                      </td>
                      <td>
                        <a href="system_gateways_edit.php?id=<?=$i;?>" class="btn btn-default btn-xs"
                          data-toggle="tooltip" title="<?=gettext("edit gateway");?>">
                          <span class="glyphicon glyphicon-pencil"></span>
                        </a>
<?php
                        if (is_numeric($gateway['attribute'])) :?>
                          <button data-id="<?=$i;?>" title="<?=gettext("delete gateway"); ?>" data-toggle="tooltip"
                                  class="act_delete btn btn-default btn-xs">
                            <span class="fa fa-trash text-muted"></span>
                          </button>
<?php
                        endif;?>
                          <a href="system_gateways_edit.php?dup=<?=$i;?>" class="btn btn-default btn-xs"
                             data-toggle="tooltip" title="<?=gettext("clone gateway");?>">
                            <span class="fa fa-clone text-muted"></span>
                          </a>
                        </td>
                      </tr>
<?php
                    $i++;
                  endforeach;?>
                    <tr>
                      <td colspan="7"></td>
                      <td>
<?php
                      if ($i > 0) :
                                      ?>
                          <button type="submit" id="btn_delete" name="del_x" class="btn btn-default btn-xs" data-toggle="tooltip"
                                  title="<?=gettext("delete selected items");?>">
                              <span class="fa fa-trash text-muted"></span>
                          </button>
<?php
                      endif;?>
                      </td>
                    </tr>
                </tbody>
              </table>
            </form>
          </div>
        </div>
      </section>
    </div>
  </div>
</section>

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