Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Model/PermissionSet.php
*/
namespace Friendica\Model;
use Friendica\Database\DBA;
/**
* @brief functions for interacting with the permission set of an object (item, photo, event, ...)
*/
class PermissionSet
{
/**
* Fetch the id of a given permission set. Generate a new one when needed
*
* @param array $postarray The array from an item, picture or event post
* @return int id
* @throws \Exception
*/
public static function fetchIDForPost(&$postarray)
{
$condition = ['uid' => $postarray['uid'],
'allow_cid' => self::sortPermissions($postarray['allow_cid'] ?? ''),
'allow_gid' => self::sortPermissions($postarray['allow_gid'] ?? ''),
'deny_cid' => self::sortPermissions($postarray['deny_cid'] ?? ''),
'deny_gid' => self::sortPermissions($postarray['deny_gid'] ?? '')];
$set = DBA::selectFirst('permissionset', ['id'], $condition);
if (!DBA::isResult($set)) {
DBA::insert('permissionset', $condition, true);
$set = DBA::selectFirst('permissionset', ['id'], $condition);
}
$postarray['allow_cid'] = null;
$postarray['allow_gid'] = null;
$postarray['deny_cid'] = null;
$postarray['deny_gid'] = null;
return $set['id'];
}
private static function sortPermissions($permissionlist)
{
$cleaned_list = trim($permissionlist, '<>');
if (empty($cleaned_list)) {
return $permissionlist;
}
$elements = explode('><', $cleaned_list);
if (count($elements) <= 1) {
return $permissionlist;
}
asort($elements);
return '<' . implode('><', $elements) . '>';
}
/**
* @brief Returns a permission set for a given contact
*
* @param integer $uid User id whom the items belong
* @param integer $contact_id Contact id of the visitor
*
* @return array of permission set ids.
* @throws \Exception
*/
static public function get($uid, $contact_id)
{
if (DBA::exists('contact', ['id' => $contact_id, 'uid' => $uid, 'blocked' => false])) {
$groups = Group::getIdsByContactId($contact_id);
}
if (empty($groups) || !is_array($groups)) {
return [];
}
$group_str = '<<>>'; // should be impossible to match
foreach ($groups as $g) {
$group_str .= '|<' . intval($g) . '>';
}
$contact_str = '<' . $contact_id . '>';
$condition = ["`uid` = ? AND (NOT (`deny_cid` REGEXP ? OR deny_gid REGEXP ?)
AND (allow_cid REGEXP ? OR allow_gid REGEXP ? OR (allow_cid = '' AND allow_gid = '')))",
$uid, $contact_str, $group_str, $contact_str, $group_str];
$ret = DBA::select('permissionset', ['id'], $condition);
$set = [];
while ($permission = DBA::fetch($ret)) {
$set[] = $permission['id'];
}
DBA::close($ret);
return $set;
}
}