base256-archive/dist/packer.js

Simple archive format that produces a base256-encoded string.

/* IMPORT */
import Base256 from 'base256-encoding';
import { TYPE_ARRAY, TYPE_OBJECT } from './constants.js';
/* HELPERS */
const Helpers = {
    /* API */
    getDivider: (values) => {
        let length = 0;
        while (true) {
            length += 3;
            const divider = `\n${'-'.repeat(length)}\n`;
            if (values.find(value => value.includes(divider)))
                continue; // Not unique, skipping
            return divider;
        }
    },
    getValues: (packable, encode = true) => {
        const encoder = encode ? (value) => Base256.encodeStr(String(value)) : String;
        if (Array.isArray(packable)) {
            return [TYPE_ARRAY, ...packable.map(encoder)];
        }
        else {
            return [TYPE_OBJECT, ...Object.entries(packable).flat().map(encoder)];
        }
    }
};
/* MAIN */
const Packer = {
    /* API */
    pack: (packable, options) => {
        const values = Helpers.getValues(packable, options?.encode);
        const divider = Helpers.getDivider(values);
        const packed = values.join(divider);
        return packed;
    }
};
/* EXPORT */
export default Packer;