<?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");
}

/**
 * @since 0.84
 *
 * Change_Problem Class
 *
 * Relation between Changes and Problems
**/
class Change_Problem extends CommonDBRelation{

   // From CommonDBRelation
   static public $itemtype_1   = 'Change';
   static public $items_id_1   = 'changes_id';

   static public $itemtype_2   = 'Problem';
   static public $items_id_2   = 'problems_id';



   function getForbiddenStandardMassiveAction() {

      $forbidden   = parent::getForbiddenStandardMassiveAction();
      $forbidden[] = 'update';
      return $forbidden;
   }


   static function getTypeName($nb = 0) {
      return _n('Link Problem/Change', 'Links Problem/Change', $nb);
   }


   /**
    * @see CommonGLPI::getTabNameForItem()
   **/
   function getTabNameForItem(CommonGLPI $item, $withtemplate = 0) {

      if (static::canView()) {
         $nb = 0;
         switch ($item->getType()) {
            case 'Change' :
               if ($_SESSION['glpishow_count_on_tabs']) {
                  $nb = countElementsInTable('glpi_changes_problems',
                                             ['changes_id' => $item->getID()]);
               }
               return self::createTabEntry(Problem::getTypeName(Session::getPluralNumber()), $nb);

            case 'Problem' :
               if ($_SESSION['glpishow_count_on_tabs']) {
                  $nb = countElementsInTable('glpi_changes_problems',
                                             ['problems_id' => $item->getID()]);
               }
               return self::createTabEntry(Change::getTypeName(Session::getPluralNumber()), $nb);
         }
      }
      return '';
   }


   static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0) {

      switch ($item->getType()) {
         case 'Change' :
            self::showForChange($item);
            break;

         case 'Problem' :
            self::showForProblem($item);
            break;
      }
      return true;
   }


   /**
    * Show tickets for a problem
    *
    * @param $problem Problem object
   **/
   static function showForProblem(Problem $problem) {
      global $DB;

      $ID = $problem->getField('id');
      if (!$problem->can($ID, READ)) {
         return false;
      }

      $canedit = $problem->canEdit($ID);
      $rand    = mt_rand();

      $iterator = $DB->request([
         'SELECT DISTINCT' => 'glpi_changes_problems.id AS linkid',
         'FIELDS'          => 'glpi_changes.*',
         'FROM'            => 'glpi_changes_problems',
         'LEFT JOIN'       => [
            'glpi_changes' => [
               'ON' => [
                  'glpi_changes_problems' => 'changes_id',
                  'glpi_changes'          => 'id'
               ]
            ]
         ],
         'WHERE'           => [
            'glpi_changes_problems.problems_id' => $ID
         ],
         'ORDERBY'         => 'glpi_changes.name'
      ]);

      $changes = [];
      $used    = [];
      $numrows = count($iterator);
      while ($data = $iterator->next()) {
         $changes[$data['id']] = $data;
         $used[$data['id']]    = $data['id'];
      }

      if ($canedit) {
         echo "<div class='firstbloc'>";

         echo "<form name='changeproblem_form$rand' id='changeproblem_form$rand' method='post'
                action='".Toolbox::getItemTypeFormURL(__CLASS__)."'>";

         echo "<table class='tab_cadre_fixe'>";
         echo "<tr class='tab_bg_2'><th colspan='3'>".__('Add a change')."</th></tr>";

         echo "<tr class='tab_bg_2'><td>";
         echo "<input type='hidden' name='problems_id' value='$ID'>";
         Change::dropdown(['used'        => $used,
                                'entity'      => $problem->getEntityID(),
                                'entity_sons' => $problem->isRecursive()]);
         echo "</td><td class='center'>";
         echo "<input type='submit' name='add' value=\""._sx('button', 'Add')."\" class='submit'>";
         echo "</td><td>";
         if (Session::haveRight('change', CREATE)) {
            echo "<a href='".Toolbox::getItemTypeFormURL('Change')."?problems_id=$ID'>";
            echo __('Create a change from this problem');
            echo "</a>";
         }
         echo "</td></tr></table>";
         Html::closeForm();
         echo "</div>";
      }

      echo "<div class='spaced'>";
      if ($canedit && $numrows) {
         Html::openMassiveActionsForm('mass'.__CLASS__.$rand);
         $massiveactionparams = ['num_displayed' => min($_SESSION['glpilist_limit'], $numrows),
                                      'container'     => 'mass'.__CLASS__.$rand];
         Html::showMassiveActions($massiveactionparams);
      }

      echo "<table class='tab_cadre_fixehov'>";
      echo "<tr class='noHover'><th colspan='12'>".Change::getTypeName($numrows)."</th>";
      echo "</tr>";
      if ($numrows) {
         Change::commonListHeader(Search::HTML_OUTPUT, 'mass'.__CLASS__.$rand);
         Session::initNavigateListItems('Change',
                                 //TRANS : %1$s is the itemtype name,
                                 //        %2$s is the name of the item (used for headings of a list)
                                         sprintf(__('%1$s = %2$s'), Problem::getTypeName(1),
                                                 $problem->fields["name"]));

         $i = 0;
         foreach ($changes as $data) {
            Session::addToNavigateListItems('Change', $data["id"]);
            Change::showShort($data['id'], ['row_num'                => $i,
                                                 'type_for_massiveaction' => __CLASS__,
                                                 'id_for_massiveaction'   => $data['linkid']]);
            $i++;
         }
         Change::commonListHeader(Search::HTML_OUTPUT, 'mass'.__CLASS__.$rand);
      }
      echo "</table>";

      if ($canedit && $numrows) {
         $massiveactionparams['ontop'] = false;
         Html::showMassiveActions($massiveactionparams);
         Html::closeForm();
      }
      echo "</div>";

   }


   /**
    * Show problems for a change
    *
    * @param $change Change object
   **/
   static function showForChange(Change $change) {
      global $DB;

      $ID = $change->getField('id');
      if (!$change->can($ID, READ)) {
         return false;
      }

      $canedit = $change->canEdit($ID);
      $rand    = mt_rand();

      $iterator = $DB->request([
         'SELECT DISTINCT' => 'glpi_changes_problems.id AS linkid',
         'FIELDS'          => 'glpi_problems.*',
         'FROM'            => 'glpi_changes_problems',
         'LEFT JOIN'       => [
            'glpi_problems' => [
               'ON' => [
                  'glpi_changes_problems' => 'problems_id',
                  'glpi_problems'         => 'id'
               ]
            ]
         ],
         'WHERE'           => [
            'glpi_changes_problems.changes_id' => $ID
         ],
         'ORDERBY'         => 'glpi_problems.name'
      ]);

      $problems = [];
      $used     = [];
      $numrows = count($iterator);
      while ($data = $iterator->next()) {
         $problems[$data['id']] = $data;
         $used[$data['id']]     = $data['id'];
      }

      if ($canedit) {
         echo "<div class='firstbloc'>";

         echo "<form name='changeproblem_form$rand' id='changeproblem_form$rand' method='post'
                action='".Toolbox::getItemTypeFormURL(__CLASS__)."'>";

         echo "<table class='tab_cadre_fixe'>";
         echo "<tr class='tab_bg_2'><th colspan='2'>".__('Add a problem')."</th></tr>";

         echo "<tr class='tab_bg_2'><td>";
         echo "<input type='hidden' name='changes_id' value='$ID'>";
         Problem::dropdown(['used'   => $used,
                                 'entity' => $change->getEntityID()]);
         echo "</td><td class='center'>";
         echo "<input type='submit' name='add' value=\""._sx('button', 'Add')."\" class='submit'>";
         echo "</td></tr></table>";
         Html::closeForm();
         echo "</div>";
      }

      echo "<div class='spaced'>";
      if ($canedit && $numrows) {
         Html::openMassiveActionsForm('mass'.__CLASS__.$rand);
         $massiveactionparams = ['num_displayed' => min($_SESSION['glpilist_limit'], $numrows),
                                      'container'     => 'mass'.__CLASS__.$rand];
         Html::showMassiveActions($massiveactionparams);
      }

      echo "<table class='tab_cadre_fixehov'>";
      echo "<tr class='noHover'><th colspan='12'>".Problem::getTypeName($numrows)."</th>";
      echo "</tr>";
      if ($numrows) {
         Problem::commonListHeader(Search::HTML_OUTPUT, 'mass'.__CLASS__.$rand);
         Session::initNavigateListItems('Problem',
                                 //TRANS : %1$s is the itemtype name,
                                 //        %2$s is the name of the item (used for headings of a list)
                                         sprintf(__('%1$s = %2$s'), Change::getTypeName(1),
                                                 $change->fields["name"]));

         $i = 0;
         foreach ($problems as $data) {
            Session::addToNavigateListItems('Problem', $data["id"]);
            Problem::showShort($data['id'], ['row_num'               => $i,
                                                 'type_for_massiveaction' => __CLASS__,
                                                 'id_for_massiveaction'   => $data['linkid']]);
            $i++;
         }
         Problem::commonListHeader(Search::HTML_OUTPUT, 'mass'.__CLASS__.$rand);
      }
      echo "</table>";

      if ($canedit && $numrows) {
         $massiveactionparams['ontop'] = false;
         Html::showMassiveActions($massiveactionparams);
         Html::closeForm();
      }
      echo "</div>";

   }


}
