<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2018 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/>.
 * ---------------------------------------------------------------------
 */

if (!defined('GLPI_ROOT')) {
   die("Sorry. You can't access this file directly");
}

/// Class SLALevel
class SlaLevel_Ticket extends CommonDBTM {

   static function getTypeName($nb = 0) {
      return __('SLA level for Ticket');
   }


   /**
    * Retrieve an item from the database
    *
    * @param $ID        ID of the item to get
    * @param $slatype
    *
    * @since 9.1 2 mandatory parameters
    *
    * @return true if succeed else false
   **/
   function getFromDBForTicket($ID, $slaType) {
      global $DB;

      $iterator = $DB->request([
         'SELECT'       => [static::getTable() . '.id'],
         'FROM'         => static::getTable(),
         'LEFT JOIN'   => [
            'glpi_slalevels' => [
               'FKEY'   => [
                  static::getTable()   => 'slalevels_id',
                  'glpi_slalevels'     => 'id'
               ]
            ],
            'glpi_slas'       => [
               'FKEY'   => [
                  'glpi_slalevels'     => 'slas_id',
                  'glpi_slas'          => 'id'
               ]
            ]
         ],
         'WHERE'        => [
            static::getTable() . '.tickets_id'  => $ID,
            'glpi_slas.type'                    => $slaType
         ],
         'LIMIT'        => 1
      ]);
      if (count($iterator) == 1) {
         $row = $iterator->next();
         return $this->getFromDB($row['id']);
      }
      return false;
   }


   /**
    * Delete entries for a ticket
    *
    * @param $tickets_id    Ticket ID
    * @param $type          Type of SLA
    *
    * @since 9.1 2 parameters mandatory
    *
    * @return nothing
   **/
   function deleteForTicket($tickets_id, $slaType) {
      global $DB;

      $iterator = $DB->request([
         'SELECT'    => 'glpi_slalevels_tickets.id',
         'FROM'      => 'glpi_slalevels_tickets',
         'LEFT JOIN' => [
            'glpi_slalevels'  => [
               'ON' => [
                  'glpi_slalevels_tickets'   => 'slalevels_id',
                  'glpi_slalevels'           => 'id'
               ]
            ],
            'glpi_slas'       => [
               'ON' => [
                  'glpi_slalevels'  => 'slas_id',
                  'glpi_slas'       => 'id'
               ]
            ]
         ],
         'WHERE'     => [
            'glpi_slalevels_tickets.tickets_id' => $tickets_id,
            'glpi_slas.type'                    => $slaType
         ]
      ]);

      while ($data = $iterator->next()) {
         $this->delete(['id' => $data['id']]);
      }
   }


   /**
    * Give cron information
    *
    * @param $name : task's name
    *
    * @return arrray of information
   **/
   static function cronInfo($name) {

      switch ($name) {
         case 'slaticket' :
            return ['description' => __('Automatic actions of SLA')];
      }
      return [];
   }


   /**
    * Cron for ticket's automatic close
    *
    * @param $task : CronTask object
    *
    * @return integer (0 : nothing done - 1 : done)
   **/
   static function cronSlaTicket(CronTask $task) {
      global $DB;

      $tot = 0;

      $iterator = $DB->request([
         'SELECT'    => [
            'glpi_slalevels_tickets.*',
            'glpi_slas.type AS type',
         ],
         'FROM'      => 'glpi_slalevels_tickets',
         'LEFT JOIN' => [
            'glpi_slalevels'  => [
               'ON' => [
                  'glpi_slalevels_tickets'   => 'slalevels_id',
                  'glpi_slalevels'           => 'id'
               ]
            ],
            'glpi_slas'       => [
               'ON' => [
                  'glpi_slalevels'  => 'slas_id',
                  'glpi_slas'       => 'id'
               ]
            ]
         ],
         'WHERE'     => [
            'glpi_slalevels_tickets.date' => ['<', new \QueryExpression('NOW()')]
         ]
      ]);

      while ($data = $iterator->next()) {
         $tot++;
         self::doLevelForTicket($data, $data['type']);
      }

      $task->setVolume($tot);
      return ($tot > 0 ? 1 : 0);
   }


   /**
    * Do a specific SLAlevel for a ticket
    *
    * @param $data          array data of an entry of slalevels_tickets
    * @param $slaType             Type of sla
    *
    * @since 9.1   2 parameters mandatory
    *
    * @return nothing
   **/
   static function doLevelForTicket(array $data, $slaType) {

      $ticket         = new Ticket();
      $slalevelticket = new self();

      // existing ticket and not deleted
      if ($ticket->getFromDB($data['tickets_id'])
          && !$ticket->isDeleted()) {

         // search all actors of a ticket
         foreach ($ticket->getUsers(CommonITILActor::REQUESTER) as $user) {
            $ticket->fields['_users_id_requester'][] = $user['users_id'];
         }
         foreach ($ticket->getUsers(CommonITILActor::ASSIGN) as $user) {
            $ticket->fields['_users_id_assign'][] = $user['users_id'];
         }
         foreach ($ticket->getUsers(CommonITILActor::OBSERVER) as $user) {
            $ticket->fields['_users_id_observer'][] = $user['users_id'];
         }

         foreach ($ticket->getGroups(CommonITILActor::REQUESTER) as $group) {
            $ticket->fields['_groups_id_requester'][] = $group['groups_id'];
         }
         foreach ($ticket->getGroups(CommonITILActor::ASSIGN) as $group) {
            $ticket->fields['_groups_id_assign'][] = $group['groups_id'];
         }
         foreach ($ticket->getGroups(CommonITILActor::OBSERVER) as $group) {
            $ticket->fields['_groups_id_observer'][] = $group['groups_id'];
         }

         foreach ($ticket->getSuppliers(CommonITILActor::ASSIGN) as $supplier) {
            $ticket->fields['_suppliers_id_assign'][] = $supplier['suppliers_id'];
         }

         $slalevel = new SlaLevel();
         $sla      = new SLA();
         // Check if sla datas are OK
         list($dateField, $slaField) = SLA::getFieldNames($slaType);
         if (($ticket->fields[$slaField] > 0)) {
            if ($ticket->fields['status'] == CommonITILObject::CLOSED) {
               // Drop line when status is closed
               $slalevelticket->delete(['id' => $data['id']]);

            } else if ($ticket->fields['status'] != CommonITILObject::SOLVED) {
               // No execution if ticket has been taken into account
               if (!(($slaType == SLM::TTO)
                     && ($ticket->fields['takeintoaccount_delay_stat'] > 0))) {
                  // If status = solved : keep the line in case of solution not validated
                  $input['id']           = $ticket->getID();
                  $input['_auto_update'] = true;

                  if ($slalevel->getRuleWithCriteriasAndActions($data['slalevels_id'], 1, 1)
                      && $sla->getFromDB($ticket->fields[$slaField])) {
                     $doit = true;
                     if (count($slalevel->criterias)) {
                        $doit = $slalevel->checkCriterias($ticket->fields);
                     }
                     // Process rules
                     if ($doit) {
                        $input = $slalevel->executeActions($input, [], $ticket->fields);
                     }
                  }

                  // Put next level in todo list
                  if ($next = $slalevel->getNextSlaLevel($ticket->fields[$slaField],
                                                         $data['slalevels_id'])) {
                     $sla->addLevelToDo($ticket, $next);
                  }
                  // Action done : drop the line
                  $slalevelticket->delete(['id' => $data['id']]);

                  $ticket->update($input);
               } else {
                  // Drop line
                  $slalevelticket->delete(['id' => $data['id']]);
               }
            }
         } else {
            // Drop line
            $slalevelticket->delete(['id' => $data['id']]);
         }

      } else {
         // Drop line
         $slalevelticket->delete(['id' => $data['id']]);
      }
   }


   /**
    * Replay all task needed for a specific ticket
    *
    * @param $tickets_id Ticket ID
    * @param $slaType Type of sla
    *
    * @since 9.1    2 parameters mandatory
    *
    */
   static function replayForTicket($tickets_id, $slaType) {
      global $DB;

      $criteria = [
         'SELECT'    => 'glpi_slalevels_tickets.*',
         'FROM'      => 'glpi_slalevels_tickets',
         'LEFT JOIN' => [
            'glpi_slalevels'  => [
               'ON' => [
                  'glpi_slalevels_tickets'   => 'slalevels_id',
                  'glpi_slalevels'           => 'id'
               ]
            ],
            'glpi_slas'       => [
               'ON' => [
                  'glpi_slalevels'  => 'slas_id',
                  'glpi_slas'       => 'id'
               ]
            ]
         ],
         'WHERE'     => [
            'glpi_slalevels_tickets.date'       => ['<', new \QueryExpression('NOW()')],
            'glpi_slalevels_tickets.tickets_id' => $tickets_id,
            'glpi_slas.type'                    => $slaType
         ]
      ];

      $number = 0;
      do {
         $iterator = $DB->request($criteria);
         $number = count($iterator);
         if ($number == 1) {
            $data = $iterator->next();
            self::doLevelForTicket($data, $slaType);
         }
      } while ($number == 1);
   }

}
