70 lines
1.6 KiB
JavaScript
70 lines
1.6 KiB
JavaScript
"use strict";
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const { encodeString } = require("./internals/querystring");
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function getAsPrimitive(value) {
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const type = typeof value;
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if (type === "string") {
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// Length check is handled inside encodeString function
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return encodeString(value);
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} else if (type === "bigint") {
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return value.toString();
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} else if (type === "boolean") {
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return value ? "true" : "false";
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} else if (type === "number" && Number.isFinite(value)) {
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return value < 1e21 ? "" + value : encodeString("" + value);
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}
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return "";
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}
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/**
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* @param {Record<string, string | number | boolean
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* | ReadonlyArray<string | number | boolean> | null>} input
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* @returns {string}
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*/
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function stringify(input) {
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let result = "";
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if (input === null || typeof input !== "object") {
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return result;
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}
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const separator = "&";
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const keys = Object.keys(input);
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const keyLength = keys.length;
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let valueLength = 0;
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for (let i = 0; i < keyLength; i++) {
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const key = keys[i];
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const value = input[key];
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const encodedKey = encodeString(key) + "=";
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if (i) {
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result += separator;
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}
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if (Array.isArray(value)) {
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valueLength = value.length;
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for (let j = 0; j < valueLength; j++) {
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if (j) {
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result += separator;
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}
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// Optimization: Dividing into multiple lines improves the performance.
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// Since v8 does not need to care about the '+' character if it was one-liner.
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result += encodedKey;
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result += getAsPrimitive(value[j]);
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}
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} else {
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result += encodedKey;
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result += getAsPrimitive(value);
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}
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}
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return result;
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}
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module.exports = stringify;
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