<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2021 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI 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 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI 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 GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

/**
 * @since 9.1
 */

class APIClient extends CommonDBTM {

   const DOLOG_DISABLED   = 0;
   const DOLOG_LOGS       = 1;
   const DOLOG_HISTORICAL = 2;

   static $rightname = 'config';

   // From CommonDBTM
   public $dohistory                   = true;

   static $undisclosedFields = [
      'app_token'
   ];

   static function canCreate() {
      return Session::haveRight(static::$rightname, UPDATE);
   }

   static function canPurge() {
      return Session::haveRight(static::$rightname, UPDATE);
   }

   static function getTypeName($nb = 0) {
      return _n("API client", "API clients", $nb);
   }

   function defineTabs($options = []) {

      $ong = [];
      $this->addDefaultFormTab($ong)
           ->addStandardTab('Log', $ong, $options);

      return $ong;
   }

   function rawSearchOptions() {
      $tab = [];

      $tab[] = [
         'id'                 => 'common',
         'name'               => self::GetTypeName()
      ];

      $tab[] = [
         'id'                 => '1',
         'table'              => $this->getTable(),
         'field'              => 'name',
         'name'               => __('Name'),
         'datatype'           => 'itemlink',
         'autocomplete'       => true,
      ];

      $tab[] = [
         'id'                 => '2',
         'table'              => $this->getTable(),
         'field'              => 'id',
         'name'               => __('ID'),
         'massiveaction'      => false,
         'datatype'           => 'number'
      ];

      $tab[] = [
         'id'                 => '3',
         'table'              => $this->getTable(),
         'field'              => 'is_active',
         'name'               => __('Active'),
         'datatype'           => 'bool'
      ];

      $tab[] = [
         'id'                 => '4',
         'table'              => $this->getTable(),
         'field'              => 'dolog_method',
         'name'               => __('Log connections'),
         'datatype'           => 'specific'
      ];

      $tab[] = [
         'id'                 => 'filter',
         'name'               => __('Filter access')
      ];

      $tab[] = [
         'id'                 => '5',
         'table'              => $this->getTable(),
         'field'              => 'ipv4_range_start',
         'name'               => __('IPv4 address range')." - ".__("Start"),
         'datatype'           => 'specific'
      ];

      $tab[] = [
         'id'                 => '6',
         'table'              => $this->getTable(),
         'field'              => 'ipv4_range_end',
         'name'               => __('IPv4 address range')." - ".__("End"),
         'datatype'           => 'specific'
      ];

      $tab[] = [
         'id'                 => '7',
         'table'              => $this->getTable(),
         'field'              => 'ipv6',
         'name'               => __('IPv6 address'),
         'datatype'           => 'text',
         'autocomplete'       => true,
      ];

      $tab[] = [
         'id'                 => '8',
         'table'              => $this->getTable(),
         'field'              => 'app_token',
         'name'               => __('Application token'),
         'massiveaction'      => false,
         'datatype'           => 'text',
         'autocomplete'       => true,
      ];

      return $tab;
   }

   static function getSpecificValueToDisplay($field, $values, array $options = []) {

      switch ($field) {
         case 'dolog_method' :
            $methods = self::getLogMethod();
            return $methods[$values[$field]];

         case 'ipv4_range_start':
         case 'ipv4_range_end':
            if (empty($values[$field])) {
               return '';
            }
            return long2ip((int)$values[$field]);
      }

      return parent::getSpecificValueToDisplay($field, $values, $options);
   }

   /**
    * Show form
    *
    * @param integer $ID      Item ID
    * @param array   $options Options
    *
    * @return void
    */
   function showForm ($ID, $options = []) {

      $this->initForm($ID, $options);
      $this->showFormHeader($options);

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Name')."</td>";
      echo "<td>";
      Html::autocompletionTextField($this, "name");
      echo "</td>";
      echo "<td rowspan='3'>".__('Comments')."</td>";
      echo "<td rowspan='3'>";
      echo "<textarea name='comment' >".$this->fields["comment"]."</textarea>";
      echo "</td></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td >".__('Active')."</td>";
      echo "<td>";
      Dropdown::showYesNo("is_active", $this->fields["is_active"]);
      echo "</td></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td >".__('Log connections')."</td>";
      echo "<td>";
      Dropdown::showFromArray("dolog_method",
                              self::getLogMethod(),
                              ['value' => $this->fields["dolog_method"]]);
      echo "</td></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<th colspan='4'>";
      echo "<div class='center'>". __("Filter access")."</div>";
      echo "</th></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td colspan='4'>";
      echo "<i>".__('Leave these parameters empty to disable API access restriction')."</i>";
      echo "<br><br><br>";
      echo "</td></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('IPv4 address range')."</td>";
      echo "<td colspan='3'>";
      echo "<input type='text' name='ipv4_range_start' value='".
            ($this->fields["ipv4_range_start"] ? long2ip($this->fields["ipv4_range_start"]) : '') .
            "' size='17'> - ";
      echo "<input type='text' name='ipv4_range_end' value='" .
            ($this->fields["ipv4_range_end"] ? long2ip($this->fields["ipv4_range_end"]) : '') .
            "' size='17'>";
      echo "</td></tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('IPv6 address')."</td>";
      echo "<td>";
      Html::autocompletionTextField($this, "ipv6");
      echo "</td>";
      echo "<td colspan='2'></td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".sprintf(__('%1$s (%2$s)'), __('Application token'), "app_token")."</td>";
      echo "<td colspan='2'>";
      Html::autocompletionTextField($this, "app_token");
      echo "<br><input type='checkbox' name='_reset_app_token' id='app_token'>&nbsp;";
      echo "<label for='app_token'>".__('Regenerate')."</label>";
      echo "</td><td></td></tr>";

      $this->showFormButtons($options);
   }

   function prepareInputForAdd($input) {
      return $this->prepareInputForUpdate($input);
   }

   function prepareInputForUpdate($input) {

      if (isset($input['ipv4_range_start'])) {
         $input['ipv4_range_start'] = ip2long($input['ipv4_range_start']);
      }

      if (isset($input['ipv4_range_end'])) {
         $input['ipv4_range_end'] = ip2long($input['ipv4_range_end']);
      }

      if (isset($input['ipv4_range_start']) && isset($input['ipv4_range_end'])) {
         if (empty($input['ipv4_range_start'])) {
            $input['ipv4_range_start'] = "NULL";
            $input['ipv4_range_end'] = "NULL";
         } else {
            if (empty($input['ipv4_range_end'])) {
               $input['ipv4_range_end'] = $input['ipv4_range_start'];
            }

            if ($input['ipv4_range_end'] < $input['ipv4_range_start']) {
               $tmp = $input['ipv4_range_end'];
               $input['ipv4_range_end'] = $input['ipv4_range_start'];
               $input['ipv4_range_start'] = $tmp;
            }
         }
      }

      if (isset($input['ipv6']) && empty($input['ipv6'])) {
         $input['ipv6'] = "NULL";
      }

      if (isset($input['_reset_app_token'])) {
         $input['app_token']      = self::getUniqueAppToken();
         $input['app_token_date'] = $_SESSION['glpi_currenttime'];
      }

      return $input;
   }

   /**
    * Get log methods
    *
    * @return array
    */
   static function getLogMethod() {

      return [self::DOLOG_DISABLED   => __('Disabled'),
                   self::DOLOG_HISTORICAL => __('Historical'),
                   self::DOLOG_LOGS       => _n('Log', 'Logs',
                                                Session::getPluralNumber())];
   }

   /**
    * Get app token checking that it is unique
    *
    * @return string app token
    */
   static function getUniqueAppToken() {

      $ok = false;
      do {
         $key    = Toolbox::getRandomString(40);
         if (countElementsInTable(self::getTable(), ['app_token' => $key]) == 0) {
            return $key;
         }
      } while (!$ok);
   }
}