basebee/lib/prepareOptions.js

Basebee is a powerful key-value store built on top of Autobase and Hyperbee, designed to efficiently manage data with customizable key/value encodings, prefix-based key organization, and batch operations. It integrates stream-based APIs for handling key-v

import c from "compact-encoding";
import {nullSafeEncoding} from "./nullSafeEncoding.js";

export function prepareOptions(rangeOrKey, options, config) {
    const _opts = {...(rangeOrKey || {}), ...(config || {}), ...(options || {})};

    // Handle prefix: if options.prefix is undefined, fallback to config.prefix, otherwise null
    let prefix = options.prefix !== undefined
        ? options.prefix
        : (config.prefix !== undefined ? config.prefix : null);

    _opts.prefix = prefix;

    // For keyEncoding and valueEncoding, prioritize options, then fallback to config, and default to binary
    _opts.keyEncoding = options.keyEncoding || config.keyEncoding || c.binary;
    _opts.valueEncoding = nullSafeEncoding(options.valueEncoding || config.valueEncoding || c.binary);

    return _opts;
}