diff options
| -rw-r--r-- | app/class/table.class.php | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/app/class/table.class.php b/app/class/table.class.php index 62f95d3..0edff9d 100644 --- a/app/class/table.class.php +++ b/app/class/table.class.php @@ -168,6 +168,45 @@ abstract class table $query = "DELETE FROM views WHERE guid = '" . $guid . "' OR viewer = '" . $guid . "'"; $this->db->query($query); } + + /* + * Get a random sha256 blob, returned as a hexadecimal string + */ + public function getBlob() : string + { + return hash("sha256", openssl_random_pseudo_bytes(64)); + } + + /* + * Get current timestamp as a string for object database purposes + */ + private function getCurrentTimestamp() : string + { + $query = "SELECT now() AS stamp"; + $res = $this->db->query($query); + return $res[0]['stamp']; + } + + /* + * Check whether the given GUID exists + */ + private function isGUID(string $guid) : bool + { + $guid = $this->db->esc($guid); + $query = "SELECT guid FROM objects WHERE guid = '" . $guid . "'"; + $res = $this->db->query($query); + return count($res) > 0; + } + + /* + * Get a new, unique GUID for a new system object + */ + private function getNewGUID() : string + { + do $guid = substr($this->getBlob(), 0, 8); + while ($this->isGUID($guid)); + return $guid; + } } ?> |