@benev/slate/x/tools/data/anka.js

frontend web stuff

/*

"anka" is an alternative to base64 that i totally made up.
    - it looks cool because it features characters from the indian subcontinent.
    - each byte is represented by one character, which makes a 256 bit id incomparably short at only 32 characters.
    - however, it's probably a bad idea, for these negative reasons:
        1. many of these characters are actually 2-or-3-byte sequences (so even though anka is visually more compact than base64 to the user, it's actually more data in terms of bytes).
        2. it's horrible for url-encoding.
        3. it's horrible for trying to manually copy by typing.

256-bit anka ids look like this:

    ஒഐওଆઊসਅവஎଉखਬശயഘसചവਭଏரঊझഠடଓઐഴঠണവઞ
    ठକநइஎਦਏஒഊটਹஜഴयભকயঙਪഉजकঝഐवઠসഏਓਡਟऋ
    થঞठખஉધഫரਜऐફരਪਙਗഭਣഎफઇমએরଔડਉதਤஅदઘച

*/
import { Bytes } from "./bytes.js";
const characters = [...new Set([
        // devanagari
        ..."अआइईउऊऋएऐओऔकखगघङचछजझञटठडढणतथदधनपफबभमयरलवशषसह",
        // tamil
        ..."அஆஇஈஉஊஎஏஐஒஓகஙசஜஞடணதநபமயரலவழளறன",
        // bengali
        ..."অআইঈউঊএঐওকখগঘঙচছজঝঞটঠডঢণতথদধনপফবভমযরলশষসহ",
        // gurmukhi
        ..."ਅਆਇਈਉਊਏਐਓਕਖਗਘਙਚਛਜਝਞਟਠਡਢਣਤਥਦਧਨਪਫਬਭਮਯਰਲਵਸਹ",
        // malayalam
        ..."അആഇഈഉഊഎഏഐഒഓകഖഗഘങചഛജഝഞടഠഡഢണതഥദധനപഫബഭമയരലവശസഹളഴറ",
        // gujarati
        ..."અઆઇઈઉઊએઐઓકખગઘઙચછજઝઞટઠડઢણતથદધનપફબભમયરલવશષસહ",
        // odia
        ..."ଅଆଇଈଉଊଏଐଓଔକଖଗଘଙଚଛଜଝଞଟଠଡଢଣତଥଦଧନପଫବଭମଯରଲଶଷସହ",
    ])];
export const Anka = Object.freeze({
    string(bytes) {
        return [...bytes]
            .map(int => characters.at(int))
            .join("");
    },
    bytes(code) {
        return new Uint8Array([...code].map(char => {
            const index = characters.indexOf(char);
            if (index === -1)
                throw new Error(`invalid anka character "${char}"`);
            return index;
        }));
    },
    random(count = 32) {
        return this.string(Bytes.random(count));
    },
});
//# sourceMappingURL=anka.js.map