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'use strict';
var getSideChannel = require('side-channel');
var utils = require('./utils');
var formats = require('./formats');
var has = Object.prototype.hasOwnProperty;
var arrayPrefixGenerators = {
brackets: function brackets(prefix) {
return prefix + '[]';
},
comma: 'comma',
indices: function indices(prefix, key) {
return prefix + '[' + key + ']';
},
repeat: function repeat(prefix) {
return prefix;
}
};
var isArray = Array.isArray;
var push = Array.prototype.push;
var pushToArray = function (arr, valueOrArray) {
push.apply(arr, isArray(valueOrArray) ? valueOrArray : [valueOrArray]);
};
var toISO = Date.prototype.toISOString;
var defaultFormat = formats['default'];
var defaults = {
addQueryPrefix: false,
allowDots: false,
allowEmptyArrays: false,
arrayFormat: 'indices',
charset: 'utf-8',
charsetSentinel: false,
commaRoundTrip: false,
delimiter: '&',
encode: true,
encodeDotInKeys: false,
encoder: utils.encode,
encodeValuesOnly: false,
filter: void undefined,
format: defaultFormat,
formatter: formats.formatters[defaultFormat],
// deprecated
indices: false,
serializeDate: function serializeDate(date) {
return toISO.call(date);
},
skipNulls: false,
strictNullHandling: false
};
var isNonNullishPrimitive = function isNonNullishPrimitive(v) {
return typeof v === 'string'
|| typeof v === 'number'
|| typeof v === 'boolean'
|| typeof v === 'symbol'
|| typeof v === 'bigint';
};
var sentinel = {};
var stringify = function stringify(
object,
prefix,
generateArrayPrefix,
commaRoundTrip,
allowEmptyArrays,
strictNullHandling,
skipNulls,
encodeDotInKeys,
encoder,
filter,
sort,
allowDots,
serializeDate,
format,
formatter,
encodeValuesOnly,
charset,
sideChannel
) {
var obj = object;
var tmpSc = sideChannel;
var step = 0;
var findFlag = false;
while ((tmpSc = tmpSc.get(sentinel)) !== void undefined && !findFlag) {
// Where object last appeared in the ref tree
var pos = tmpSc.get(object);
step += 1;
if (typeof pos !== 'undefined') {
if (pos === step) {
throw new RangeError('Cyclic object value');
} else {
findFlag = true; // Break while
}
}
if (typeof tmpSc.get(sentinel) === 'undefined') {
step = 0;
}
}
if (typeof filter === 'function') {
obj = filter(prefix, obj);
} else if (obj instanceof Date) {
obj = serializeDate(obj);
} else if (generateArrayPrefix === 'comma' && isArray(obj)) {
obj = utils.maybeMap(obj, function (value) {
if (value instanceof Date) {
return serializeDate(value);
}
return value;
});
}
if (obj === null) {
if (strictNullHandling) {
return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder, charset, 'key', format) : prefix;
}
obj = '';
}
if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
if (encoder) {
var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, 'key', format);
return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset, 'value', format))];
}
return [formatter(prefix) + '=' + formatter(String(obj))];
}
var values = [];
if (typeof obj === 'undefined') {
return values;
}
var objKeys;
if (generateArrayPrefix === 'comma' && isArray(obj)) {
// we need to join elements in
if (encodeValuesOnly && encoder) {
obj = utils.maybeMap(obj, encoder);
}
objKeys = [{ value: obj.length > 0 ? obj.join(',') || null : void undefined }];
} else if (isArray(filter)) {
objKeys = filter;
} else {
var keys = Object.keys(obj);
objKeys = sort ? keys.sort(sort) : keys;
}
var encodedPrefix = encodeDotInKeys ? String(prefix).replace(/\./g, '%2E') : String(prefix);
var adjustedPrefix = commaRoundTrip && isArray(obj) && obj.length === 1 ? encodedPrefix + '[]' : encodedPrefix;
if (allowEmptyArrays && isArray(obj) && obj.length === 0) {
return adjustedPrefix + '[]';
}
for (var j = 0; j < objKeys.length; ++j) {
var key = objKeys[j];
var value = typeof key === 'object' && key && typeof key.value !== 'undefined'
? key.value
: obj[key];
if (skipNulls && value === null) {
continue;
}
var encodedKey = allowDots && encodeDotInKeys ? String(key).replace(/\./g, '%2E') : String(key);
var keyPrefix = isArray(obj)
? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(adjustedPrefix, encodedKey) : adjustedPrefix
: adjustedPrefix + (allowDots ? '.' + encodedKey : '[' + encodedKey + ']');
sideChannel.set(object, step);
var valueSideChannel = getSideChannel();
valueSideChannel.set(sentinel, sideChannel);
pushToArray(values, stringify(
value,
keyPrefix,
generateArrayPrefix,
commaRoundTrip,
allowEmptyArrays,
strictNullHandling,
skipNulls,
encodeDotInKeys,
generateArrayPrefix === 'comma' && encodeValuesOnly && isArray(obj) ? null : encoder,
filter,
sort,
allowDots,
serializeDate,
format,
formatter,
encodeValuesOnly,
charset,
valueSideChannel
));
}
return values;
};
var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
if (!opts) {
return defaults;
}
if (typeof opts.allowEmptyArrays !== 'undefined' && typeof opts.allowEmptyArrays !== 'boolean') {
throw new TypeError('`allowEmptyArrays` option can only be `true` or `false`, when provided');
}
if (typeof opts.encodeDotInKeys !== 'undefined' && typeof opts.encodeDotInKeys !== 'boolean') {
throw new TypeError('`encodeDotInKeys` option can only be `true` or `false`, when provided');
}
if (opts.encoder !== null && typeof opts.encoder !== 'undefined' && typeof opts.encoder !== 'function') {
throw new TypeError('Encoder has to be a function.');
}
var charset = opts.charset || defaults.charset;
if (typeof opts.charset !== 'undefined' && opts.charset !== 'utf-8' && opts.charset !== 'iso-8859-1') {
throw new TypeError('The charset option must be either utf-8, iso-8859-1, or undefined');
}
var format = formats['default'];
if (typeof opts.format !== 'undefined') {
if (!has.call(formats.formatters, opts.format)) {
throw new TypeError('Unknown format option provided.');
}
format = opts.format;
}
var formatter = formats.formatters[format];
var filter = defaults.filter;
if (typeof opts.filter === 'function' || isArray(opts.filter)) {
filter = opts.filter;
}
var arrayFormat;
if (opts.arrayFormat in arrayPrefixGenerators) {
arrayFormat = opts.arrayFormat;
} else if ('indices' in opts) {
arrayFormat = opts.indices ? 'indices' : 'repeat';
} else {
arrayFormat = defaults.arrayFormat;
}
if ('commaRoundTrip' in opts && typeof opts.commaRoundTrip !== 'boolean') {
throw new TypeError('`commaRoundTrip` must be a boolean, or absent');
}
var allowDots = typeof opts.allowDots === 'undefined' ? opts.encodeDotInKeys === true ? true : defaults.allowDots : !!opts.allowDots;
return {
addQueryPrefix: typeof opts.addQueryPrefix === 'boolean' ? opts.addQueryPrefix : defaults.addQueryPrefix,
allowDots: allowDots,
allowEmptyArrays: typeof opts.allowEmptyArrays === 'boolean' ? !!opts.allowEmptyArrays : defaults.allowEmptyArrays,
arrayFormat: arrayFormat,
charset: charset,
charsetSentinel: typeof opts.charsetSentinel === 'boolean' ? opts.charsetSentinel : defaults.charsetSentinel,
commaRoundTrip: !!opts.commaRoundTrip,
delimiter: typeof opts.delimiter === 'undefined' ? defaults.delimiter : opts.delimiter,
encode: typeof opts.encode === 'boolean' ? opts.encode : defaults.encode,
encodeDotInKeys: typeof opts.encodeDotInKeys === 'boolean' ? opts.encodeDotInKeys : defaults.encodeDotInKeys,
encoder: typeof opts.encoder === 'function' ? opts.encoder : defaults.encoder,
encodeValuesOnly: typeof opts.encodeValuesOnly === 'boolean' ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
filter: filter,
format: format,
formatter: formatter,
serializeDate: typeof opts.serializeDate === 'function' ? opts.serializeDate : defaults.serializeDate,
skipNulls: typeof opts.skipNulls === 'boolean' ? opts.skipNulls : defaults.skipNulls,
sort: typeof opts.sort === 'function' ? opts.sort : null,
strictNullHandling: typeof opts.strictNullHandling === 'boolean' ? opts.strictNullHandling : defaults.strictNullHandling
};
};
module.exports = function (object, opts) {
var obj = object;
var options = normalizeStringifyOptions(opts);
var objKeys;
var filter;
if (typeof options.filter === 'function') {
filter = options.filter;
obj = filter('', obj);
} else if (isArray(options.filter)) {
filter = options.filter;
objKeys = filter;
}
var keys = [];
if (typeof obj !== 'object' || obj === null) {
return '';
}
var generateArrayPrefix = arrayPrefixGenerators[options.arrayFormat];
var commaRoundTrip = generateArrayPrefix === 'comma' && options.commaRoundTrip;
if (!objKeys) {
objKeys = Object.keys(obj);
}
if (options.sort) {
objKeys.sort(options.sort);
}
var sideChannel = getSideChannel();
for (var i = 0; i < objKeys.length; ++i) {
var key = objKeys[i];
var value = obj[key];
if (options.skipNulls && value === null) {
continue;
}
pushToArray(keys, stringify(
value,
key,
generateArrayPrefix,
commaRoundTrip,
options.allowEmptyArrays,
options.strictNullHandling,
options.skipNulls,
options.encodeDotInKeys,
options.encode ? options.encoder : null,
options.filter,
options.sort,
options.allowDots,
options.serializeDate,
options.format,
options.formatter,
options.encodeValuesOnly,
options.charset,
sideChannel
));
}
var joined = keys.join(options.delimiter);
var prefix = options.addQueryPrefix === true ? '?' : '';
if (options.charsetSentinel) {
if (options.charset === 'iso-8859-1') {
// encodeURIComponent('✓'), the "numeric entity" representation of a checkmark
prefix += 'utf8=%26%2310003%3B&';
} else {
// encodeURIComponent('✓')
prefix += 'utf8=%E2%9C%93&';
}
}
return joined.length > 0 ? prefix + joined : '';
};