'use strict';
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var $ = require('../internals/export');
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var getBuiltIn = require('../internals/get-built-in');
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var apply = require('../internals/function-apply');
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var call = require('../internals/function-call');
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var uncurryThis = require('../internals/function-uncurry-this');
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var fails = require('../internals/fails');
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var isArray = require('../internals/is-array');
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var isCallable = require('../internals/is-callable');
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var isRawJSON = require('../internals/is-raw-json');
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var isSymbol = require('../internals/is-symbol');
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var classof = require('../internals/classof-raw');
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var toString = require('../internals/to-string');
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var arraySlice = require('../internals/array-slice');
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var parseJSONString = require('../internals/parse-json-string');
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var uid = require('../internals/uid');
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var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
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var NATIVE_RAW_JSON = require('../internals/native-raw-json');
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var $String = String;
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var $stringify = getBuiltIn('JSON', 'stringify');
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var exec = uncurryThis(/./.exec);
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var charAt = uncurryThis(''.charAt);
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var charCodeAt = uncurryThis(''.charCodeAt);
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var replace = uncurryThis(''.replace);
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var slice = uncurryThis(''.slice);
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var push = uncurryThis([].push);
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var numberToString = uncurryThis(1.1.toString);
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var surrogates = /[\uD800-\uDFFF]/g;
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var lowSurrogates = /^[\uD800-\uDBFF]$/;
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var hiSurrogates = /^[\uDC00-\uDFFF]$/;
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var MARK = uid();
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var MARK_LENGTH = MARK.length;
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var WRONG_SYMBOLS_CONVERSION = !NATIVE_SYMBOL || fails(function () {
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var symbol = getBuiltIn('Symbol')('stringify detection');
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// MS Edge converts symbol values to JSON as {}
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return $stringify([symbol]) !== '[null]'
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// WebKit converts symbol values to JSON as null
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|| $stringify({ a: symbol }) !== '{}'
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// V8 throws on boxed symbols
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|| $stringify(Object(symbol)) !== '{}';
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});
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// https://github.com/tc39/proposal-well-formed-stringify
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var ILL_FORMED_UNICODE = fails(function () {
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return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
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|| $stringify('\uDEAD') !== '"\\udead"';
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});
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var stringifyWithProperSymbolsConversion = WRONG_SYMBOLS_CONVERSION ? function (it, replacer) {
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var args = arraySlice(arguments);
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var $replacer = getReplacerFunction(replacer);
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if (!isCallable($replacer) && (it === undefined || isSymbol(it))) return; // IE8 returns string on undefined
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args[1] = function (key, value) {
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// some old implementations (like WebKit) could pass numbers as keys
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if (isCallable($replacer)) value = call($replacer, this, $String(key), value);
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if (!isSymbol(value)) return value;
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};
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return apply($stringify, null, args);
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} : $stringify;
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var fixIllFormedJSON = function (match, offset, string) {
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var prev = charAt(string, offset - 1);
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var next = charAt(string, offset + 1);
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if ((exec(lowSurrogates, match) && !exec(hiSurrogates, next)) || (exec(hiSurrogates, match) && !exec(lowSurrogates, prev))) {
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return '\\u' + numberToString(charCodeAt(match, 0), 16);
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} return match;
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};
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var getReplacerFunction = function (replacer) {
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if (isCallable(replacer)) return replacer;
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if (!isArray(replacer)) return;
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var rawLength = replacer.length;
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var keys = [];
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for (var i = 0; i < rawLength; i++) {
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var element = replacer[i];
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if (typeof element == 'string') push(keys, element);
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else if (typeof element == 'number' || classof(element) === 'Number' || classof(element) === 'String') push(keys, toString(element));
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}
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var keysLength = keys.length;
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var root = true;
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return function (key, value) {
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if (root) {
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root = false;
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return value;
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}
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if (isArray(this)) return value;
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for (var j = 0; j < keysLength; j++) if (keys[j] === key) return value;
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};
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};
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// `JSON.stringify` method
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// https://tc39.es/ecma262/#sec-json.stringify
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// https://github.com/tc39/proposal-json-parse-with-source
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if ($stringify) $({ target: 'JSON', stat: true, arity: 3, forced: WRONG_SYMBOLS_CONVERSION || ILL_FORMED_UNICODE || !NATIVE_RAW_JSON }, {
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stringify: function stringify(text, replacer, space) {
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var replacerFunction = getReplacerFunction(replacer);
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var rawStrings = [];
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var json = stringifyWithProperSymbolsConversion(text, function (key, value) {
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// some old implementations (like WebKit) could pass numbers as keys
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var v = isCallable(replacerFunction) ? call(replacerFunction, this, $String(key), value) : value;
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return !NATIVE_RAW_JSON && isRawJSON(v) ? MARK + (push(rawStrings, v.rawJSON) - 1) : v;
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}, space);
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if (typeof json != 'string') return json;
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if (ILL_FORMED_UNICODE) json = replace(json, surrogates, fixIllFormedJSON);
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if (NATIVE_RAW_JSON) return json;
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var result = '';
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var length = json.length;
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for (var i = 0; i < length; i++) {
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var chr = charAt(json, i);
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if (chr === '"') {
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var end = parseJSONString(json, ++i).end - 1;
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var string = slice(json, i, end);
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result += slice(string, 0, MARK_LENGTH) === MARK
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? rawStrings[slice(string, MARK_LENGTH)]
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: '"' + string + '"';
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i = end;
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} else result += chr;
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}
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return result;
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}
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});
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