Hello,
is it possible to prevent a user from leaving a group? I understand the onGroupLeave event, but I can only revert the change there. However, JomSocial will still display that the user left the group. So I would need an option to prevent this message or even let the menu item disappear for anyone but group admins and super users.

Are there other options to implement this feature?

Hi, Ralph.

Sure thing, the best solution will be to just hide "Leave" option.

Copy this file:

ROOT/components/com_community/templates/default/groups.viewgroup.php

to:

ROOT/templates/your-template/html/com_community (if you don't have "html" or "com_community" folders, feel free to create them)

Change this (line 149):

<?php if( ($isMember) && (!$isMine) && !($waitingApproval) && (COwnerHelper::isRegisteredUser()) ) { ?>
                <li><a tabindex="-1" href="javascript:void(0);" onclick="joms.groups.leave('<?php echo $group->id;?>');"><?php echo JText::_('COM_COMMUNITY_GROUPS_LEAVE');?></a></li>
                  <?php } ?>

<?php if($isSuperAdmin) { ?>
                <li><a tabindex="-1" href="javascript:void(0);" onclick="joms.groups.leave('<?php echo $group->id;?>');"><?php echo JText::_('COM_COMMUNITY_GROUPS_LEAVE');?></a></li>
                  <?php } ?>