<?php
	
	class UserGroupsEventHandler extends kDBEventHandler {
	
		/**
		 * Adds user as member for selected groups
		 *
		 * @param kEvent $event
		 */
		function OnProcessSelected(&$event)
		{
			$new_groups = $this->Application->GetVar('g');
			if (!$new_groups) {
				return ;
			}
			
			$new_groups = array_keys($new_groups);
			
			// don't insert duplicate group membership record
			$user_id = $this->Application->GetVar('u_id');
			$table_name = $this->Application->GetTempName(TABLE_PREFIX.'UserGroup', 'prefix:u');
			$sql = 'SELECT GroupId
					FROM '.$table_name.'
					WHERE PortalUserId = '.$user_id;
			$old_groups = $this->Conn->GetCol($sql);
			
			$new_groups = array_diff($new_groups, $old_groups);
			if ($new_groups) {
				foreach ($new_groups as $new_group) {
					$fields_hash = Array (
						'GroupId'		=>	$new_group,
						'PortalUserId'	=>	$user_id,
						'PrimaryGroup'	=>	0,
					);
					$this->Conn->doInsert($fields_hash, $table_name);
				}
			}
			
			$event->SetRedirectParam('opener', 'u');
		}
		
		/**
		 * Sets primary group for user (in editing only)
		 *
		 * @param kEvent $event
		 */
		function OnSetPrimary(&$event)
		{
			$ids = $this->StoreSelectedIDs($event);
			if ($ids) {
				$id = array_shift($ids);
				$object =& $event->getObject( Array('skip_autoload' => true) );
				$user_id = $this->Application->GetVar('u_id');
				
				$sql = 'UPDATE '.$object->TableName.'
						SET PrimaryGroup = 0
						WHERE PortalUserId = '.$user_id;
				$this->Conn->Query($sql);
	
				$sql = 'UPDATE '.$object->TableName.'
						SET PrimaryGroup = 1
						WHERE '.$object->IDField.' = '.$id.' AND PortalUserId = '.$user_id;
				$this->Conn->Query($sql);
			}
			
			$this->clearSelectedIDs($event);
		}
		
		/**
		 * Don't allow primary group record deleting
		 *
		 * @param kEvent $event
		 */
		function customProcessing(&$event, $type)
		{
			if ($event->Name == 'OnMassDelete' && $type == 'before') {
				$ids = $event->getEventParam('ids');
				if ($ids) {
					$object =& $event->getObject( Array('skip_autoload' => true) );
					$user_id = $this->Application->GetVar('u_id');
					$sql = 'SELECT '.$object->IDField.'
							FROM '.$object->TableName.'
							WHERE '.$object->IDField.' IN ('.implode(',', $ids).') AND PortalUserId = '.$user_id.' AND PrimaryGroup = 0';
					$ids = $this->Conn->GetCol($sql);
					$event->setEventParam('ids', $ids);
				}
			}
		}
	}

?>