49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
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'use strict';
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var $TypeError = require('es-errors/type');
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var callBound = require('call-bind/callBound');
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var forEach = require('../helpers/forEach');
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var $charCodeAt = callBound('String.prototype.charCodeAt');
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var $numberToString = callBound('Number.prototype.toString');
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var $toLowerCase = callBound('String.prototype.toLowerCase');
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var $strSlice = callBound('String.prototype.slice');
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var $strSplit = callBound('String.prototype.split');
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// https://262.ecma-international.org/6.0/#sec-quotejsonstring
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var escapes = {
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'\u0008': 'b',
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'\u000C': 'f',
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'\u000A': 'n',
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'\u000D': 'r',
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'\u0009': 't'
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};
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module.exports = function QuoteJSONString(value) {
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if (typeof value !== 'string') {
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throw new $TypeError('Assertion failed: `value` must be a String');
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}
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var product = '"';
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if (value) {
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forEach($strSplit(value), function (C) {
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if (C === '"' || C === '\\') {
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product += '\u005C' + C;
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} else if (C === '\u0008' || C === '\u000C' || C === '\u000A' || C === '\u000D' || C === '\u0009') {
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var abbrev = escapes[C];
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product += '\u005C' + abbrev;
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} else {
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var cCharCode = $charCodeAt(C, 0);
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if (cCharCode < 0x20) {
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product += '\u005Cu' + $toLowerCase($strSlice('0000' + $numberToString(cCharCode, 16), -4));
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} else {
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product += C;
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}
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}
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});
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}
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product += '"';
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return product;
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};
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