h) dddlZddlZddlmZddlmZdedefdZdededefd Z d ed edefd Z y) N)DEFAULT_ALPHABET)Sqidssreturncd}t|D]}|dzt|z }|dz}|dz|dz dzz}|dk\r|dz}|S) a Compute a hash of the input string using the djb2 algorithm. This implementation processes the characters in reverse order and applies the djb2 algorithm with a twist for 32-bit overflow handling. It then adjusts the result to a signed 32-bit integer. Args: s (str): The input string to be hashed. Returns: int: A signed 32-bit hash of the input string. i!lli@ll)reversedord)rhchars Q/var/www/Befach/backend/env/lib/python3.12/site-packages/upyloadthing/file_key.pydjb2rsc A  Vs4y  Z ZQ!Vz12A J [ Hstringseedc (t|}t|}tt|D]U}t t j t j ||dz|zt|}||||c||<||<Wdj|S)a Shuffle the characters of the given string using a seed. The shuffling process is based on a numeric seed derived from the djb2 hash of the provided seed string, ensuring that the same seed produces the same shuffled result for a given string. Args: string (str): The string to be shuffled. seed (str): The seed string used to influence the shuffling. Returns: str: The shuffled string. r )listrrangelenintmathfmodjoin)rrcharsseed_numijs rshuffler $s LEDzH 3u:   $))Ha!e4q8#e*E F"1XuQxa%( 775>r file_seedapp_idctt|}t|djt t |g}t j|jj}||zS)a Generate a unique key using a file seed and an application identifier. This function generates a unique key by first shuffling the default alphabet using the application id as a seed. It then encodes the absolute value of the djb2 hash of the application id using the Sqids algorithm and a minimum length of 12. Finally, it encodes the file seed with Base64 in a URL-safe manner and concatenates the two encoded strings. Args: file_seed (str): A seed string to represent or identify the file. app_id (str): The application identifier used to influence the key generation and alphabet shuffling. Returns: str: The generated unique key. ) min_length) r rrencodeabsrbase64urlsafe_b64encodedecode)r!r"alphabetencoded_app_idencoded_file_seeds r generate_keyr.=sc$'0H83::CV r3sX , C C 8Css2.C...r