@conpago/mongo-cursor-pagination/dist/node/utils/bsonUrlEncoding.js

Make it easy to return cursor-paginated results from a Mongo collection

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = void 0;
const bson_1 = require("bson");
// BSON can't encode undefined values, so we will use this value instead:
const BSON_UNDEFINED = "__mixmax__undefined__";
/**
 * These will take a paging handle (`next` or `previous`) and encode/decode it
 * as a string which can be passed in a URL.
 */
function _encode(str) {
    return Buffer.from(encodeURIComponent(str)).toString("base64");
}
function _decode(str) {
    return decodeURIComponent(Buffer.from(str, "base64").toString());
}
const encode = (obj) => {
    if (Array.isArray(obj) && obj[0] === undefined)
        obj[0] = BSON_UNDEFINED;
    else if (typeof obj === "string" && obj === "")
        return obj;
    return _encode(typeof obj === "string" ? obj : bson_1.EJSON.stringify(obj, { relaxed: true }));
};
exports.encode = encode;
const decode = (str) => {
    if (str === "")
        return str;
    const obj = bson_1.EJSON.parse(_decode(str), { relaxed: true });
    if (Array.isArray(obj) && obj[0] === BSON_UNDEFINED)
        obj[0] = undefined;
    return obj;
};
exports.decode = decode;
//# sourceMappingURL=bsonUrlEncoding.js.map