Function incrementBase32

source/crockford.ts:62–88

(str: string)

}

export function incrementBase32(str: string): string {
    let done: string | undefined = undefined,
        index = str.length,
        char: string,
        charIndex: number,
        output = str;
    const maxCharIndex = ENCODING_LEN - 1;
    while (!done && index-- >= 0) {
        char = output[index];
        charIndex = ENCODING.indexOf(char);
        if (charIndex === -1) {
            throw new ULIDError(
                ULIDErrorCode.Base32IncorrectEncoding,
                "Incorrectly encoded string"
            );
        }
        if (charIndex === maxCharIndex) {
            output = replaceCharAt(output, index, ENCODING[0]);
            continue;
        }
        done = replaceCharAt(output, index, ENCODING[charIndex + 1]);
    }
    if (typeof done === "string") {
        return done;
    }
    throw new ULIDError(ULIDErrorCode.Base32IncorrectEncoding, "Failed incrementing string");
}