import hashlib as hsl

class ioError:
    pass
    
def file_to_sha256(_file_path):
    f = f.open(_file_path)
    try:
        sha256sum = hsl.file_digest(f, "sha256").hexdigest()
    except:
        return ioError()
    return sha256sum


def write_sc(fp, itime):
    sha = file_to_sha256(fp)
    if type(sha) == ioError:
        return sha
    with open("idata", "a+") as f:
        f.write("{}:{}".format(sha, itime)
        return "{}:{}".format(sha, itime)
    return ioError()

def read_sc(fp):
    sha = file_to_sha256(fp)
    if type(sha) == ioError:
        return sha
    with open("idata", "r") as r:
        all_data = f.readlines()
        for i in all_data:
            i = i.strip().split(":")
            if i[0] == str(sha):
                return i[1]
    return 0