'use strict';
var utils = require('./utils');
var formats = require('./formats');
var has = Object.prototype.hasOwnProperty;
var arrayPrefixGenerators = {
brackets: function brackets(prefix) { // eslint-disable-line func-name-matching
return prefix + '[]';
},
comma: 'comma',
indices: function indices(prefix, key) { // eslint-disable-line func-name-matching
return prefix + '[' + key + ']';
},
repeat: function repeat(prefix) { // eslint-disable-line func-name-matching
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 defaults = {
addQueryPrefix: false,
allowDots: false,
charset: 'utf-8',
charsetSentinel: false,
delimiter: '&',
encode: true,
encoder: utils.encode,
encodeValuesOnly: false,
formatter: formats.formatters[formats['default']],
// deprecated
indices: false,
serializeDate: function serializeDate(date) { // eslint-disable-line func-name-matching
return toISO.call(date);
},
skipNulls: false,
strictNullHandling: false
};
var stringify = function stringify( // eslint-disable-line func-name-matching
object,
prefix,
generateArrayPrefix,
strictNullHandling,
skipNulls,
encoder,
filter,
sort,
allowDots,
serializeDate,
formatter,
encodeValuesOnly,
charset
) {
var obj = object;
if (typeof filter === 'function') {
obj = filter(prefix, obj);
} else if (obj instanceof Date) {
obj = serializeDate(obj);
} else if (generateArrayPrefix === 'comma' && isArray(obj)) {
obj = obj.join(',');
}
if (obj === null) {
if (strictNullHandling) {
return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder, charset) : prefix;
}
obj = '';
}
if (typeof obj === 'string' || typeof obj === 'number' || typeof obj === 'boolean' || utils.isBuffer(obj)) {
if (encoder) {
var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset);
return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset))];
}
return [formatter(prefix) + '=' + formatter(String(obj))];
}
var values = [];
if (typeof obj === 'undefined') {
return values;
}
var objKeys;
if (isArray(filter)) {
objKeys = filter;
} else {
var keys = Object.keys(obj);
objKeys = sort ? keys.sort(sort) : keys;
}
for (var i = 0; i < objKeys.length; ++i) {
var key = objKeys[i];
if (skipNulls && obj[key] === null) {
continue;
}
if (isArray(obj)) {
pushToArray(values, stringify(
obj[key],
typeof generateArrayPrefix === 'function' ? generateArrayPrefix(prefix, key) : prefix,
generateArrayPrefix,
strictNullHandling,
skipNulls,
encoder,
filter,
sort,
allowDots,
serializeDate,
formatter,
encodeValuesOnly,
charset
));
} else {
pushToArray(values, stringify(
obj[key],
prefix + (allowDots ? '.' + key : '[' + key + ']'),
generateArrayPrefix,
strictNullHandling,
skipNulls,
encoder,
filter,
sort,
allowDots,
serializeDate,
formatter,
encodeValuesOnly,
charset
));
}
}
return values;
};
var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
if (!opts) {
return defaults;
}
if (opts.encoder !== null && 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;
}
return {
addQueryPrefix: typeof opts.addQueryPrefix === 'boolean' ? opts.addQueryPrefix : defaults.addQueryPrefix,
allowDots: typeof opts.allowDots === 'undefined' ? defaults.allowDots : !!opts.allowDots,
charset: charset,
charsetSentinel: typeof opts.charsetSentinel === 'boolean' ? opts.charsetSentinel : defaults.charsetSentinel,
delimiter: typeof opts.delimiter === 'undefined' ? defaults.delimiter : opts.delimiter,
encode: typeof opts.encode === 'boolean' ? opts.encode : defaults.encode,
encoder: typeof opts.encoder === 'function' ? opts.encoder : defaults.encoder,
encodeValuesOnly: typeof opts.encodeValuesOnly === 'boolean' ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
filter: filter,
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 arrayFormat;
if (opts && opts.arrayFormat in arrayPrefixGenerators) {
arrayFormat = opts.arrayFormat;
} else if (opts && 'indices' in opts) {
arrayFormat = opts.indices ? 'indices' : 'repeat';
} else {
arrayFormat = 'indices';
}
var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];
if (!objKeys) {
objKeys = Object.keys(obj);
}
if (options.sort) {
objKeys.sort(options.sort);
}
for (var i = 0; i < objKeys.length; ++i) {
var key = objKeys[i];
if (options.skipNulls && obj[key] === null) {
continue;
}
pushToArray(keys, stringify(
obj[key],
key,
generateArrayPrefix,
options.strictNullHandling,
options.skipNulls,
options.encode ? options.encoder : null,
options.filter,
options.sort,
options.allowDots,
options.serializeDate,
options.formatter,
options.encodeValuesOnly,
options.charset
));
}
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 : '';
};