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'use strict';
const strictUriEncode = require('strict-uri-encode');
const decodeComponent = require('decode-uri-component');
const splitOnFirst = require('split-on-first');
const filterObject = require('filter-obj');
const isNullOrUndefined = value => value === null || value === undefined;
function encoderForArrayFormat(options) {
switch (options.arrayFormat) {
case 'index':
return key => (result, value) => {
const index = result.length;
if (
value === undefined ||
(options.skipNull && value === null) ||
(options.skipEmptyString && value === '')
) {
return result;
}
if (value === null) {
return [...result, [encode(key, options), '[', index, ']'].join('')];
}
return [
...result,
[encode(key, options), '[', encode(index, options), ']=', encode(value, options)].join('')
];
};
case 'bracket':
return key => (result, value) => {
if (
value === undefined ||
(options.skipNull && value === null) ||
(options.skipEmptyString && value === '')
) {
return result;
}
if (value === null) {
return [...result, [encode(key, options), '[]'].join('')];
}
return [...result, [encode(key, options), '[]=', encode(value, options)].join('')];
};
case 'comma':
case 'separator':
return key => (result, value) => {
if (value === null || value === undefined || value.length === 0) {
return result;
}
if (result.length === 0) {
return [[encode(key, options), '=', encode(value, options)].join('')];
}
return [[result, encode(value, options)].join(options.arrayFormatSeparator)];
};
default:
return key => (result, value) => {
if (
value === undefined ||
(options.skipNull && value === null) ||
(options.skipEmptyString && value === '')
) {
return result;
}
if (value === null) {
return [...result, encode(key, options)];
}
return [...result, [encode(key, options), '=', encode(value, options)].join('')];
};
}
}
function parserForArrayFormat(options) {
let result;
switch (options.arrayFormat) {
case 'index':
return (key, value, accumulator) => {
result = /\[(\d*)\]$/.exec(key);
key = key.replace(/\[\d*\]$/, '');
if (!result) {
accumulator[key] = value;
return;
}
if (accumulator[key] === undefined) {
accumulator[key] = {};
}
accumulator[key][result[1]] = value;
};
case 'bracket':
return (key, value, accumulator) => {
result = /(\[\])$/.exec(key);
key = key.replace(/\[\]$/, '');
if (!result) {
accumulator[key] = value;
return;
}
if (accumulator[key] === undefined) {
accumulator[key] = [value];
return;
}
accumulator[key] = [].concat(accumulator[key], value);
};
case 'comma':
case 'separator':
return (key, value, accumulator) => {
const isArray = typeof value === 'string' && value.includes(options.arrayFormatSeparator);
const isEncodedArray = (typeof value === 'string' && !isArray && decode(value, options).includes(options.arrayFormatSeparator));
value = isEncodedArray ? decode(value, options) : value;
const newValue = isArray || isEncodedArray ? value.split(options.arrayFormatSeparator).map(item => decode(item, options)) : value === null ? value : decode(value, options);
accumulator[key] = newValue;
};
default:
return (key, value, accumulator) => {
if (accumulator[key] === undefined) {
accumulator[key] = value;
return;
}
accumulator[key] = [].concat(accumulator[key], value);
};
}
}
function validateArrayFormatSeparator(value) {
if (typeof value !== 'string' || value.length !== 1) {
throw new TypeError('arrayFormatSeparator must be single character string');
}
}
function encode(value, options) {
if (options.encode) {
return options.strict ? strictUriEncode(value) : encodeURIComponent(value);
}
return value;
}
function decode(value, options) {
if (options.decode) {
return decodeComponent(value);
}
return value;
}
function keysSorter(input) {
if (Array.isArray(input)) {
return input.sort();
}
if (typeof input === 'object') {
return keysSorter(Object.keys(input))
.sort((a, b) => Number(a) - Number(b))
.map(key => input[key]);
}
return input;
}
function removeHash(input) {
const hashStart = input.indexOf('#');
if (hashStart !== -1) {
input = input.slice(0, hashStart);
}
return input;
}
function getHash(url) {
let hash = '';
const hashStart = url.indexOf('#');
if (hashStart !== -1) {
hash = url.slice(hashStart);
}
return hash;
}
function extract(input) {
input = removeHash(input);
const queryStart = input.indexOf('?');
if (queryStart === -1) {
return '';
}
return input.slice(queryStart + 1);
}
function parseValue(value, options) {
if (options.parseNumbers && !Number.isNaN(Number(value)) && (typeof value === 'string' && value.trim() !== '')) {
value = Number(value);
} else if (options.parseBooleans && value !== null && (value.toLowerCase() === 'true' || value.toLowerCase() === 'false')) {
value = value.toLowerCase() === 'true';
}
return value;
}
function parse(query, options) {
options = Object.assign({
decode: true,
sort: true,
arrayFormat: 'none',
arrayFormatSeparator: ',',
parseNumbers: false,
parseBooleans: false
}, options);
validateArrayFormatSeparator(options.arrayFormatSeparator);
const formatter = parserForArrayFormat(options);
// Create an object with no prototype
const ret = Object.create(null);
if (typeof query !== 'string') {
return ret;
}
query = query.trim().replace(/^[?#&]/, '');
if (!query) {
return ret;
}
for (const param of query.split('&')) {
if (param === '') {
continue;
}
let [key, value] = splitOnFirst(options.decode ? param.replace(/\+/g, ' ') : param, '=');
// Missing `=` should be `null`:
// http://w3.org/TR/2012/WD-url-20120524/#collect-url-parameters
value = value === undefined ? null : ['comma', 'separator'].includes(options.arrayFormat) ? value : decode(value, options);
formatter(decode(key, options), value, ret);
}
for (const key of Object.keys(ret)) {
const value = ret[key];
if (typeof value === 'object' && value !== null) {
for (const k of Object.keys(value)) {
value[k] = parseValue(value[k], options);
}
} else {
ret[key] = parseValue(value, options);
}
}
if (options.sort === false) {
return ret;
}
return (options.sort === true ? Object.keys(ret).sort() : Object.keys(ret).sort(options.sort)).reduce((result, key) => {
const value = ret[key];
if (Boolean(value) && typeof value === 'object' && !Array.isArray(value)) {
// Sort object keys, not values
result[key] = keysSorter(value);
} else {
result[key] = value;
}
return result;
}, Object.create(null));
}
exports.extract = extract;
exports.parse = parse;
exports.stringify = (object, options) => {
if (!object) {
return '';
}
options = Object.assign({
encode: true,
strict: true,
arrayFormat: 'none',
arrayFormatSeparator: ','
}, options);
validateArrayFormatSeparator(options.arrayFormatSeparator);
const shouldFilter = key => (
(options.skipNull && isNullOrUndefined(object[key])) ||
(options.skipEmptyString && object[key] === '')
);
const formatter = encoderForArrayFormat(options);
const objectCopy = {};
for (const key of Object.keys(object)) {
if (!shouldFilter(key)) {
objectCopy[key] = object[key];
}
}
const keys = Object.keys(objectCopy);
if (options.sort !== false) {
keys.sort(options.sort);
}
return keys.map(key => {
const value = object[key];
if (value === undefined) {
return '';
}
if (value === null) {
return encode(key, options);
}
if (Array.isArray(value)) {
return value
.reduce(formatter(key), [])
.join('&');
}
return encode(key, options) + '=' + encode(value, options);
}).filter(x => x.length > 0).join('&');
};
exports.parseUrl = (url, options) => {
options = Object.assign({
decode: true
}, options);
const [url_, hash] = splitOnFirst(url, '#');
return Object.assign(
{
url: url_.split('?')[0] || '',
query: parse(extract(url), options)
},
options && options.parseFragmentIdentifier && hash ? {fragmentIdentifier: decode(hash, options)} : {}
);
};
exports.stringifyUrl = (object, options) => {
options = Object.assign({
encode: true,
strict: true
}, options);
const url = removeHash(object.url).split('?')[0] || '';
const queryFromUrl = exports.extract(object.url);
const parsedQueryFromUrl = exports.parse(queryFromUrl, {sort: false});
const query = Object.assign(parsedQueryFromUrl, object.query);
let queryString = exports.stringify(query, options);
if (queryString) {
queryString = `?${queryString}`;
}
let hash = getHash(object.url);
if (object.fragmentIdentifier) {
hash = `#${encode(object.fragmentIdentifier, options)}`;
}
return `${url}${queryString}${hash}`;
};
exports.pick = (input, filter, options) => {
options = Object.assign({
parseFragmentIdentifier: true
}, options);
const {url, query, fragmentIdentifier} = exports.parseUrl(input, options);
return exports.stringifyUrl({
url,
query: filterObject(query, filter),
fragmentIdentifier
}, options);
};
exports.exclude = (input, filter, options) => {
const exclusionFilter = Array.isArray(filter) ? key => !filter.includes(key) : (key, value) => !filter(key, value);
return exports.pick(input, exclusionFilter, options);
};