<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2020 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 Ticket links
class Ticket_Ticket extends CommonDBRelation {


   // From CommonDBRelation
   static public $itemtype_1     = 'Ticket';
   static public $items_id_1     = 'tickets_id_1';
   static public $itemtype_2     = 'Ticket';
   static public $items_id_2     = 'tickets_id_2';

   static public $check_entity_coherency = false;

   // Ticket links
   const LINK_TO        = 1;
   const DUPLICATE_WITH = 2;
   const SON_OF         = 3;
   const PARENT_OF      = 4;


   /**
    * @since 0.85
    *
    * @see CommonDBTM::showMassiveActionsSubForm()
   **/
   static function showMassiveActionsSubForm(MassiveAction $ma) {

      switch ($ma->getAction()) {
         case 'add' :
            $rand = Ticket_Ticket::dropdownLinks('link');
            printf(__('%1$s: %2$s'), Ticket::getTypeName(1), __('ID'));
            echo "&nbsp;<input type='text' name='tickets_id_1' value='' size='10'>\n";
            echo "<br><br>";
            echo "<br><br><input type='submit' name='massiveaction' class='submit' value='".
                           _sx('button', 'Post')."'>";
            return true;
      }
      return parent::showMassiveActionsSubForm($ma);
   }


   /**
    * @since 0.85
    *
    * @see CommonDBTM::processMassiveActionsForOneItemtype()
   **/
   static function processMassiveActionsForOneItemtype(MassiveAction $ma, CommonDBTM $item,
                                                       array $ids) {

      switch ($ma->getAction()) {
         case 'add' :
            $input = $ma->getInput();
            $ticket = new Ticket();
            if (isset($input['link'])
                && isset($input['tickets_id_1'])) {
               if ($item->getFromDB($input['tickets_id_1'])) {
                  foreach ($ids as $id) {
                     $input2                          = [];
                     $input2['id']                    = $input['tickets_id_1'];
                     $input2['_link']['tickets_id_1'] = $input['tickets_id_1'];
                     $input2['_link']['link']         = $input['link'];
                     $input2['_link']['tickets_id_2'] = $id;
                     if ($item->can($input['tickets_id_1'], UPDATE)) {
                        if ($ticket->update($input2)) {
                           $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_OK);
                        } else {
                           $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_KO);
                           $ma->addMessage($item->getErrorMessage(ERROR_ON_ACTION));
                        }
                     } else {
                         $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_NORIGHT);
                         $ma->addMessage($item->getErrorMessage(ERROR_RIGHT));
                     }
                  }
               }
            }
            return;
      }
      parent::processMassiveActionsForOneItemtype($ma, $item, $ids);
   }


   /**
    * Get linked tickets to a ticket
    *
    * @param $ID ID of the ticket id
    *
    * @return array of linked tickets  array(id=>linktype)
   **/
   static function getLinkedTicketsTo ($ID) {
      global $DB;

      // Make new database object and fill variables
      if (empty($ID)) {
         return false;
      }

      $iterator = $DB->request([
         'FROM'   => self::getTable(),
         'WHERE'  => [
            'OR'  => [
               'tickets_id_1' => $ID,
               'tickets_id_2' => $ID
            ]
         ]
      ]);
      $tickets = [];

      while ($data = $iterator->next()) {
         if ($data['tickets_id_1'] != $ID) {
            $tickets[$data['id']] = [
               'link'         => $data['link'],
               'tickets_id_1' => $data['tickets_id_1'],
               'tickets_id'   => $data['tickets_id_1']
            ];
         } else {
            $tickets[$data['id']] = [
               'link'       => $data['link'],
               'tickets_id' => $data['tickets_id_2']
            ];
         }
      }

      ksort($tickets);
      return $tickets;
   }


   /**
    * Display linked tickets to a ticket
    *
    * @param $ID ID of the ticket id
    *
    * @return void
   **/
   static function displayLinkedTicketsTo ($ID) {
      $tickets   = self::getLinkedTicketsTo($ID);
      $canupdate = Session::haveRight('ticket', UPDATE);

      $ticket    = new Ticket();
      $tick      = new Ticket();
      if (is_array($tickets) && count($tickets)) {
         foreach ($tickets as $linkid => $data) {
            if ($ticket->getFromDB($data['tickets_id'])) {
               $icons =  Ticket::getStatusIcon($ticket->fields['status']);
               if ($canupdate) {
                  if ($tick->getFromDB($ID)
                      && ($tick->fields['status'] != CommonITILObject::CLOSED)) {
                     $icons .= '&nbsp;'.Html::getSimpleForm(static::getFormURL(), 'purge',
                                                            _x('button', 'Delete permanently'),
                                                         ['id'         => $linkid,
                                                          'tickets_id' => $ID],
                                                         'fa-times-circle');
                  }
               }
               $inverted = (isset($data['tickets_id_1']));
               $text = sprintf(__('%1$s %2$s'), self::getLinkName($data['link'], $inverted),
                               $ticket->getLink(['forceid' => true]));
               printf(__('%1$s %2$s'), $text, $icons);

            }
            echo '<br>';
         }
      }
   }


   /**
    * Dropdown for links between tickets
    *
    * @param string  $myname select name
    * @param integer $value  default value (default self::LINK_TO)
    *
    * @return void
   **/
   static function dropdownLinks($myname, $value = self::LINK_TO) {

      $tmp[self::LINK_TO]        = __('Linked to');
      $tmp[self::DUPLICATE_WITH] = __('Duplicates');
      $tmp[self::SON_OF]         = __('Son of');
      $tmp[self::PARENT_OF]      = __('Parent of');
      Dropdown::showFromArray($myname, $tmp, ['value' => $value]);
   }


   /**
    * Get Link Name
    *
    * @param integer $value    Current value
    * @param boolean $inverted Whether to invert label
    *
    * @return string
   **/
   static function getLinkName($value, $inverted = false) {
      $tmp = [];

      if (!$inverted) {
         $tmp[self::LINK_TO]        = __('Linked to');
         $tmp[self::DUPLICATE_WITH] = __('Duplicates');
         $tmp[self::SON_OF]         = __('Son of');
         $tmp[self::PARENT_OF]      = __('Parent of');
      } else {
         $tmp[self::LINK_TO]        = __('Linked to');
         $tmp[self::DUPLICATE_WITH] = __('Duplicated by');
         $tmp[self::SON_OF]         = __('Parent of');
         $tmp[self::PARENT_OF]      = __('Son of');
      }

      if (isset($tmp[$value])) {
         return $tmp[$value];
      }
      return NOT_AVAILABLE;
   }


   function prepareInputForAdd($input) {
      // Clean values
      $input['tickets_id_1'] = Toolbox::cleanInteger($input['tickets_id_1']);
      $input['tickets_id_2'] = Toolbox::cleanInteger($input['tickets_id_2']);

      // Check of existance of rights on both Ticket(s) is done by the parent
      if ($input['tickets_id_2'] == $input['tickets_id_1']) {
         return false;
      }

      if (!isset($input['link'])) {
         $input['link'] = self::LINK_TO;
      }

      $this->checkParentSon($input);

      // No multiple links
      $tickets = self::getLinkedTicketsTo($input['tickets_id_1']);
      if (count($tickets)) {
         foreach ($tickets as $key => $t) {
            if ($t['tickets_id'] == $input['tickets_id_2']) {
               // Delete old simple link
               if (($input['link'] == self::DUPLICATE_WITH)
                   && ($t['link'] == self::LINK_TO)) {
                  $tt = new Ticket_Ticket();
                  $tt->delete(["id" => $key]);
               } else { // No duplicate link
                  return false;
               }
            }
         }
      }

      return parent::prepareInputForAdd($input);
   }


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


   /**
    * Check for parent relation (inverse of son)
    *
    * @param array $input Input
    *
    * @return void
    */
   public function checkParentSon(&$input) {
      if (isset($input['link']) && $input['link'] == Ticket_Ticket::PARENT_OF) {
         //a PARENT_OF relation is an inverted SON_OF one :)
         $id1 = $input['tickets_id_2'];
         $id2 = $input['tickets_id_1'];
         $input['tickets_id_1'] = $id1;
         $input['tickets_id_2'] = $id2;
         $input['link']         = Ticket_Ticket::SON_OF;
      }
   }


   function post_deleteFromDB() {
      global $CFG_GLPI;

      $t = new Ticket();
      $t->updateDateMod($this->fields['tickets_id_1']);
      $t->updateDateMod($this->fields['tickets_id_2']);
      parent::post_deleteFromDB();

      $donotif = !isset($this->input['_disablenotif']) && $CFG_GLPI["use_notifications"];
      if ($donotif) {
         $t->getFromDB($this->fields['tickets_id_1']);
         NotificationEvent::raiseEvent("update", $t);
         $t->getFromDB($this->fields['tickets_id_2']);
         NotificationEvent::raiseEvent("update", $t);
      }
   }


   function post_addItem() {
      global $CFG_GLPI;

      $t = new Ticket();
      $t->updateDateMod($this->fields['tickets_id_1']);
      $t->updateDateMod($this->fields['tickets_id_2']);
      parent::post_addItem();

      $donotif = !isset($this->input['_disablenotif']) && $CFG_GLPI["use_notifications"];
      if ($donotif) {
         $t->getFromDB($this->fields['tickets_id_1']);
         NotificationEvent::raiseEvent("update", $t);
         $t->getFromDB($this->fields['tickets_id_2']);
         NotificationEvent::raiseEvent("update", $t);
      }

   }


   /**
    * Count number of open children for a parent
    *
    * @param integer $pid Parent ID
    *
    * @return integer
    */
   public function countOpenChildren($pid) {
      global $DB;

      $result = $DB->request([
         'COUNT'        => 'cpt',
         'FROM'         => $this->getTable() . ' AS links',
         'INNER JOIN'   => [
            Ticket::getTable() . ' AS tickets' => [
               'ON' => [
                  'links'     => 'tickets_id_1',
                  'tickets'   => 'id'
               ]
            ]
         ],
         'WHERE'        => [
            'links.link'         => self::SON_OF,
            'links.tickets_id_2' => $pid,
            'NOT'                => [
               'tickets.status'  => Ticket::getClosedStatusArray() + Ticket::getSolvedStatusArray()
            ]
         ]
      ])->next();
      return (int)$result['cpt'];
   }


   /**
    * Affect the same solution/status for duplicates tickets.
    *
    * @param integer           $ID        ID of the ticket id
    * @param ITILSolution|null $solution  Ticket's solution
    *
    * @return void
   **/
   static function manageLinkedTicketsOnSolved($ID, $solution = null) {

      $ticket = new Ticket();
      if (!$ticket->getfromDB($ID)) {
         return;
      }
      $tickets = self::getLinkedTicketsTo($ID);

      if (false === $tickets) {
         return;
      }

      $tickets = array_filter(
         $tickets,
         function ($data) {
            $linked_ticket = new Ticket();
            $linked_ticket->getFromDB($data['tickets_id']);
            return $linked_ticket->can($data['tickets_id'], UPDATE)
                && ($data['link'] == self::DUPLICATE_WITH)
                && ($linked_ticket->fields['status'] != CommonITILObject::SOLVED)
                && ($linked_ticket->fields['status'] != CommonITILObject::CLOSED);
         }
      );

      if (null === $solution) {
         // Change status without adding a solution
         // This will be done if a ticket is solved/closed without a solution
         foreach ($tickets as $data) {
            $linked_ticket = new Ticket();
            $linked_ticket->update(
               [
                  'id'     => $data['tickets_id'],
                  'status' => $ticket->fields['status']
               ]
            );
         }
      } else {
         // Add same solution to duplicates
         $solution_data = $solution->fields;
         unset($solution_data['id']);
         unset($solution_data['date_creation']);
         unset($solution_data['date_mod']);

         foreach ($tickets as $data) {
            $solution_data['items_id'] = $data['tickets_id'];
            $solution_data['_linked_ticket'] = true;
            $new_solution = new ITILSolution();
            $new_solution->add($solution_data);
         }
      }
   }
}