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