nested-query-params/lib/print.js

Rack like parsing of nested query parameters

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.printQueryParamVal = exports.printQueryParams = exports.printQuery = void 0;
/**
 * Serializes the given object to a valid query parameter string. Supported
 * types are Arrays, Objects and basic value types. Heavily inspired by
 * {@link https://github.com/rails/rails/blob/main/activesupport/lib/active_support/core_ext/object/to_query.rb#L61-L89|Rack's nested query parser}.
 *
 * @example
 * // returns "?one[two]=3";
 * parseQuery({ one: { two: "3" } });
 */
function printQuery(query, ns) {
    return "?" + printQueryParams(query, ns);
}
exports.printQuery = printQuery;
function printQueryParams(query, ns) {
    const makeKey = (key) => (ns ? `${ns}[${key}]` : key);
    return Object.entries(query)
        .map(([key, val]) => printQueryParamVal(val, makeKey(key)))
        .join("&");
}
exports.printQueryParams = printQueryParams;
function printQueryParamVal(query, ns) {
    if (typeof query === "object") {
        if (!Array.isArray(query)) {
            return printQueryParams(query, ns);
        }
        const prefix = `${ns}[]`;
        if (query.length === 0) {
            return printQueryParamVal("", prefix);
        }
        return query.map((q) => printQueryParamVal(q, prefix)).join("&");
    }
    return `${encode(ns)}=${encode(query)}`;
}
exports.printQueryParamVal = printQueryParamVal;
function encode(str) {
    return encodeURIComponent(str);
}
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