original_string: public function change_sortorder_by_one($up) {
          global $DB;
          $params = array($this->sortorder, $this->parent);
          if ($up) {
              $select = 'sortorder < ? AND parent = ?';
              $sort = 'sortorder DESC';
          } else {
              $select = 'sortorder > ? AND parent = ?';
              $sort = 'sortorder ASC';
          }
          fix_course_sortorder();
          $swapcategory = $DB->get_records_select('course_categories', $select, $params, $sort, '*', 0, 1);
          $swapcategory = reset($swapcategory);
          if ($swapcategory) {
              $DB->set_field('course_categories', 'sortorder', $swapcategory->sortorder, array('id' => $this->id));
              $DB->set_field('course_categories', 'sortorder', $this->sortorder, array('id' => $swapcategory->id));
              $this->sortorder = $swapcategory->sortorder;
  
              $event = \core\event\course_category_updated::create(array(
                  'objectid' => $this->id,
                  'context' => $this->get_context()
              ));
              $event->set_legacy_logdata(array(SITEID, 'category', 'move', 'management.php?categoryid=' . $this->id,
                  $this->id));
              $event->trigger();
  
              // Finally reorder courses.
              fix_course_sortorder();
              cache_helper::purge_by_event('changesincoursecat');
              return true;
          }
          return false;
      }
code: public function change_sortorder_by_one($up) {
          global $DB;
          $params = array($this->sortorder, $this->parent);
          if ($up) {
              $select = 'sortorder < ? AND parent = ?';
              $sort = 'sortorder DESC';
          } else {
              $select = 'sortorder > ? AND parent = ?';
              $sort = 'sortorder ASC';
          }
          fix_course_sortorder();
          $swapcategory = $DB->get_records_select('course_categories', $select, $params, $sort, '*', 0, 1);
          $swapcategory = reset($swapcategory);
          if ($swapcategory) {
              $DB->set_field('course_categories', 'sortorder', $swapcategory->sortorder, array('id' => $this->id));
              $DB->set_field('course_categories', 'sortorder', $this->sortorder, array('id' => $swapcategory->id));
              $this->sortorder = $swapcategory->sortorder;
  
              $event = \core\event\course_category_updated::create(array(
                  'objectid' => $this->id,
                  'context' => $this->get_context()
              ));
              $event->set_legacy_logdata(array(SITEID, 'category', 'move', 'management.php?categoryid=' . $this->id,
                  $this->id));
              $event->trigger();
  
              // Finally reorder courses.
              fix_course_sortorder();
              cache_helper::purge_by_event('changesincoursecat');
              return true;
          }
          return false;
      }
code_tokens: public function change_sortorder_by_one ( $ up ) { global $ DB ; $ params = array ( $ this -> sortorder , $ this -> parent ) ; if ( $ up ) { $ select = 'sortorder < ? AND parent = ?' ; $ sort = 'sortorder DESC' ; } else { $ select = 'sortorder > ? AND parent = ?' ; $ sort = 'sortorder ASC' ; } fix_course_sortorder ( ) ; $ swapcategory = $ DB -> get_records_select ( 'course_categories' , $ select , $ params , $ sort , '*' , 0 , 1 ) ; $ swapcategory = reset ( $ swapcategory ) ; if ( $ swapcategory ) { $ DB -> set_field ( 'course_categories' , 'sortorder' , $ swapcategory -> sortorder , array ( 'id' => $ this -> id ) ) ; $ DB -> set_field ( 'course_categories' , 'sortorder' , $ this -> sortorder , array ( 'id' => $ swapcategory -> id ) ) ; $ this -> sortorder = $ swapcategory -> sortorder ; $ event = \ core \ event \ course_category_updated :: create ( array ( 'objectid' => $ this -> id , 'context' => $ this -> get_context ( ) ) ) ; $ event -> set_legacy_logdata ( array ( SITEID , 'category' , 'move' , 'management.php?categoryid=' . $ this -> id , $ this -> id ) ) ; $ event -> trigger ( ) ; // Finally reorder courses. fix_course_sortorder ( ) ; cache_helper :: purge_by_event ( 'changesincoursecat' ) ; return true ; } return false ; }
docstring: Changes the sort order of this categories parent shifting this category up or down one.
  
  @param bool $up If set to true the category is shifted up one spot, else its moved down.
  @return bool True on success, false otherwise.
docstring_tokens: Changes the sort order of this categories parent shifting this category up or down one .