If you go to the Categories section, and then click on properties, you can specify which Categories/folders are hidden. Good luck!

You can read this page in Wiki

Here is my recommendation, the simplest solution in my opinion.

Forget about permission at category level, it is an advanced solution and I don't think you need such a powerful feature. Use permissions at photo level.

1) make all your categories public on [Administration > Categories > Properties > Public / Private]

2) change the "who can see this photo?" setting to "Admins, Family, Friends, Contacts" for the photos you want to hide to unregistered visitors. You can change this setting on photos one by one, or use the "bulk manager" on  a given category or on the [Administration > Photos > Caddie]. You can ask for details if you don't know how to use the "bulk manager".

3) install + activate the LocalFiles Editor plugin.

4) open [Administration > Plugins > LocalFiles Editor > Personal plugin] and paste:

<?php
/*
Plugin Name: Personal Plugin
Version: 1.0
Description: Personal Plugin
Plugin URI: http://piwigo.org
Author:
Author URI:
*/

add_event_handler('register_user', 'set_default_privacy_level');
function set_default_privacy_level($user)
{
  $query = '
UPDATE '.USER_INFOS_TABLE.'
  SET level = 1
  WHERE user_id = '.$user['id'].'
;';
  pwg_query($query);
}

?>

Now, when visitors browse your gallery:
1) if he's not registered he only sees the photos visible by "Everybody"
2) when he registers, he automatically get the "Contacts" privacy level

Sorry for the little piece of "coding". It would be better to have an option "default privacy level for registered user".

Pleuris wrote:

thanks for your reply. But sadly I must have done something wrong. At this time my piwigo page doesn't work no more. I'm only getting a blank page. So I will first take a backup of all the pictures and start all over again.

No, it must be a problem in your personal plugin, open your FTP connection and remove the "plugins/PersonalPlugin" directory.

Just reinstalled it. Trying to get the basic setup right. So 4 photo's to start. 1 for everybody and the 3 other for registerd users. After a lot of swearing it seems to work.

The biggest problem is that newly registrerd users don't automaticaly get the contact privileges. Also when all almost 20.000 photo's are being used I hope I get to give them all the right properties at once.

Big thanks for all your help so far.