'use strict';
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var getSideChannel = require('side-channel');
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var utils = require('./utils');
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var formats = require('./formats');
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var has = Object.prototype.hasOwnProperty;
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var arrayPrefixGenerators = {
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brackets: function brackets(prefix) {
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return prefix + '[]';
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},
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comma: 'comma',
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indices: function indices(prefix, key) {
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return prefix + '[' + key + ']';
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},
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repeat: function repeat(prefix) {
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return prefix;
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}
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};
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var isArray = Array.isArray;
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var split = String.prototype.split;
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var push = Array.prototype.push;
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var pushToArray = function (arr, valueOrArray) {
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push.apply(arr, isArray(valueOrArray) ? valueOrArray : [valueOrArray]);
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};
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var toISO = Date.prototype.toISOString;
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var defaultFormat = formats['default'];
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var defaults = {
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addQueryPrefix: false,
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allowDots: false,
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charset: 'utf-8',
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charsetSentinel: false,
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delimiter: '&',
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encode: true,
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encoder: utils.encode,
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encodeValuesOnly: false,
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format: defaultFormat,
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formatter: formats.formatters[defaultFormat],
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// deprecated
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indices: false,
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serializeDate: function serializeDate(date) {
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return toISO.call(date);
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},
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skipNulls: false,
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strictNullHandling: false
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};
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var isNonNullishPrimitive = function isNonNullishPrimitive(v) {
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return typeof v === 'string'
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|| typeof v === 'number'
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|| typeof v === 'boolean'
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|| typeof v === 'symbol'
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|| typeof v === 'bigint';
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};
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var sentinel = {};
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var stringify = function stringify(
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object,
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prefix,
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generateArrayPrefix,
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commaRoundTrip,
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strictNullHandling,
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skipNulls,
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encoder,
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filter,
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sort,
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allowDots,
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serializeDate,
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format,
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formatter,
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encodeValuesOnly,
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charset,
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sideChannel
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) {
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var obj = object;
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var tmpSc = sideChannel;
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var step = 0;
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var findFlag = false;
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while ((tmpSc = tmpSc.get(sentinel)) !== void undefined && !findFlag) {
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// Where object last appeared in the ref tree
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var pos = tmpSc.get(object);
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step += 1;
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if (typeof pos !== 'undefined') {
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if (pos === step) {
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throw new RangeError('Cyclic object value');
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} else {
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findFlag = true; // Break while
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}
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}
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if (typeof tmpSc.get(sentinel) === 'undefined') {
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step = 0;
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}
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}
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if (typeof filter === 'function') {
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obj = filter(prefix, obj);
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} else if (obj instanceof Date) {
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obj = serializeDate(obj);
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} else if (generateArrayPrefix === 'comma' && isArray(obj)) {
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obj = utils.maybeMap(obj, function (value) {
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if (value instanceof Date) {
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return serializeDate(value);
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}
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return value;
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});
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}
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if (obj === null) {
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if (strictNullHandling) {
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return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder, charset, 'key', format) : prefix;
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}
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obj = '';
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}
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if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
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if (encoder) {
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var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, 'key', format);
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if (generateArrayPrefix === 'comma' && encodeValuesOnly) {
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var valuesArray = split.call(String(obj), ',');
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var valuesJoined = '';
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for (var i = 0; i < valuesArray.length; ++i) {
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valuesJoined += (i === 0 ? '' : ',') + formatter(encoder(valuesArray[i], defaults.encoder, charset, 'value', format));
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}
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return [formatter(keyValue) + (commaRoundTrip && isArray(obj) && valuesArray.length === 1 ? '[]' : '') + '=' + valuesJoined];
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}
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return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset, 'value', format))];
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}
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return [formatter(prefix) + '=' + formatter(String(obj))];
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}
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var values = [];
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if (typeof obj === 'undefined') {
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return values;
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}
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var objKeys;
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if (generateArrayPrefix === 'comma' && isArray(obj)) {
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// we need to join elements in
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objKeys = [{ value: obj.length > 0 ? obj.join(',') || null : void undefined }];
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} else if (isArray(filter)) {
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objKeys = filter;
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} else {
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var keys = Object.keys(obj);
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objKeys = sort ? keys.sort(sort) : keys;
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}
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var adjustedPrefix = commaRoundTrip && isArray(obj) && obj.length === 1 ? prefix + '[]' : prefix;
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for (var j = 0; j < objKeys.length; ++j) {
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var key = objKeys[j];
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var value = typeof key === 'object' && typeof key.value !== 'undefined' ? key.value : obj[key];
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if (skipNulls && value === null) {
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continue;
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}
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var keyPrefix = isArray(obj)
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? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(adjustedPrefix, key) : adjustedPrefix
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: adjustedPrefix + (allowDots ? '.' + key : '[' + key + ']');
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sideChannel.set(object, step);
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var valueSideChannel = getSideChannel();
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valueSideChannel.set(sentinel, sideChannel);
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pushToArray(values, stringify(
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value,
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keyPrefix,
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generateArrayPrefix,
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commaRoundTrip,
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strictNullHandling,
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skipNulls,
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encoder,
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filter,
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sort,
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allowDots,
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serializeDate,
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format,
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formatter,
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encodeValuesOnly,
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charset,
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valueSideChannel
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));
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}
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return values;
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};
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var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
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if (!opts) {
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return defaults;
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}
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if (opts.encoder !== null && typeof opts.encoder !== 'undefined' && typeof opts.encoder !== 'function') {
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throw new TypeError('Encoder has to be a function.');
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}
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var charset = opts.charset || defaults.charset;
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if (typeof opts.charset !== 'undefined' && opts.charset !== 'utf-8' && opts.charset !== 'iso-8859-1') {
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throw new TypeError('The charset option must be either utf-8, iso-8859-1, or undefined');
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}
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var format = formats['default'];
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if (typeof opts.format !== 'undefined') {
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if (!has.call(formats.formatters, opts.format)) {
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throw new TypeError('Unknown format option provided.');
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}
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format = opts.format;
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}
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var formatter = formats.formatters[format];
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var filter = defaults.filter;
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if (typeof opts.filter === 'function' || isArray(opts.filter)) {
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filter = opts.filter;
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}
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return {
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addQueryPrefix: typeof opts.addQueryPrefix === 'boolean' ? opts.addQueryPrefix : defaults.addQueryPrefix,
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allowDots: typeof opts.allowDots === 'undefined' ? defaults.allowDots : !!opts.allowDots,
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charset: charset,
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charsetSentinel: typeof opts.charsetSentinel === 'boolean' ? opts.charsetSentinel : defaults.charsetSentinel,
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delimiter: typeof opts.delimiter === 'undefined' ? defaults.delimiter : opts.delimiter,
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encode: typeof opts.encode === 'boolean' ? opts.encode : defaults.encode,
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encoder: typeof opts.encoder === 'function' ? opts.encoder : defaults.encoder,
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encodeValuesOnly: typeof opts.encodeValuesOnly === 'boolean' ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
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filter: filter,
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format: format,
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formatter: formatter,
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serializeDate: typeof opts.serializeDate === 'function' ? opts.serializeDate : defaults.serializeDate,
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skipNulls: typeof opts.skipNulls === 'boolean' ? opts.skipNulls : defaults.skipNulls,
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sort: typeof opts.sort === 'function' ? opts.sort : null,
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strictNullHandling: typeof opts.strictNullHandling === 'boolean' ? opts.strictNullHandling : defaults.strictNullHandling
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};
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};
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module.exports = function (object, opts) {
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var obj = object;
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var options = normalizeStringifyOptions(opts);
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var objKeys;
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var filter;
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if (typeof options.filter === 'function') {
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filter = options.filter;
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obj = filter('', obj);
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} else if (isArray(options.filter)) {
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filter = options.filter;
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objKeys = filter;
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}
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var keys = [];
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if (typeof obj !== 'object' || obj === null) {
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return '';
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}
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var arrayFormat;
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if (opts && opts.arrayFormat in arrayPrefixGenerators) {
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arrayFormat = opts.arrayFormat;
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} else if (opts && 'indices' in opts) {
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arrayFormat = opts.indices ? 'indices' : 'repeat';
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} else {
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arrayFormat = 'indices';
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}
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var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];
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if (opts && 'commaRoundTrip' in opts && typeof opts.commaRoundTrip !== 'boolean') {
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throw new TypeError('`commaRoundTrip` must be a boolean, or absent');
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}
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var commaRoundTrip = generateArrayPrefix === 'comma' && opts && opts.commaRoundTrip;
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if (!objKeys) {
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objKeys = Object.keys(obj);
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}
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if (options.sort) {
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objKeys.sort(options.sort);
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}
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var sideChannel = getSideChannel();
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for (var i = 0; i < objKeys.length; ++i) {
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var key = objKeys[i];
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if (options.skipNulls && obj[key] === null) {
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continue;
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}
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pushToArray(keys, stringify(
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obj[key],
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key,
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generateArrayPrefix,
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commaRoundTrip,
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options.strictNullHandling,
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options.skipNulls,
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options.encode ? options.encoder : null,
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options.filter,
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options.sort,
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options.allowDots,
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options.serializeDate,
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options.format,
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options.formatter,
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options.encodeValuesOnly,
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options.charset,
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sideChannel
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));
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}
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var joined = keys.join(options.delimiter);
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var prefix = options.addQueryPrefix === true ? '?' : '';
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if (options.charsetSentinel) {
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if (options.charset === 'iso-8859-1') {
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// encodeURIComponent('✓'), the "numeric entity" representation of a checkmark
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prefix += 'utf8=%26%2310003%3B&';
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} else {
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// encodeURIComponent('✓')
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prefix += 'utf8=%E2%9C%93&';
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}
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}
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return joined.length > 0 ? prefix + joined : '';
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};
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