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- 'use strict';
-
- var formats = require('./formats');
-
- var has = Object.prototype.hasOwnProperty;
- var isArray = Array.isArray;
-
- var hexTable = (function () {
- var array = [];
- for (var i = 0; i < 256; ++i) {
- array.push('%' + ((i < 16 ? '0' : '') + i.toString(16)).toUpperCase());
- }
-
- return array;
- }());
-
- var compactQueue = function compactQueue(queue) {
- while (queue.length > 1) {
- var item = queue.pop();
- var obj = item.obj[item.prop];
-
- if (isArray(obj)) {
- var compacted = [];
-
- for (var j = 0; j < obj.length; ++j) {
- if (typeof obj[j] !== 'undefined') {
- compacted.push(obj[j]);
- }
- }
-
- item.obj[item.prop] = compacted;
- }
- }
- };
-
- var arrayToObject = function arrayToObject(source, options) {
- var obj = options && options.plainObjects ? Object.create(null) : {};
- for (var i = 0; i < source.length; ++i) {
- if (typeof source[i] !== 'undefined') {
- obj[i] = source[i];
- }
- }
-
- return obj;
- };
-
- var merge = function merge(target, source, options) {
- /* eslint no-param-reassign: 0 */
- if (!source) {
- return target;
- }
-
- if (typeof source !== 'object') {
- if (isArray(target)) {
- target.push(source);
- } else if (target && typeof target === 'object') {
- if ((options && (options.plainObjects || options.allowPrototypes)) || !has.call(Object.prototype, source)) {
- target[source] = true;
- }
- } else {
- return [target, source];
- }
-
- return target;
- }
-
- if (!target || typeof target !== 'object') {
- return [target].concat(source);
- }
-
- var mergeTarget = target;
- if (isArray(target) && !isArray(source)) {
- mergeTarget = arrayToObject(target, options);
- }
-
- if (isArray(target) && isArray(source)) {
- source.forEach(function (item, i) {
- if (has.call(target, i)) {
- var targetItem = target[i];
- if (targetItem && typeof targetItem === 'object' && item && typeof item === 'object') {
- target[i] = merge(targetItem, item, options);
- } else {
- target.push(item);
- }
- } else {
- target[i] = item;
- }
- });
- return target;
- }
-
- return Object.keys(source).reduce(function (acc, key) {
- var value = source[key];
-
- if (has.call(acc, key)) {
- acc[key] = merge(acc[key], value, options);
- } else {
- acc[key] = value;
- }
- return acc;
- }, mergeTarget);
- };
-
- var assign = function assignSingleSource(target, source) {
- return Object.keys(source).reduce(function (acc, key) {
- acc[key] = source[key];
- return acc;
- }, target);
- };
-
- var decode = function (str, decoder, charset) {
- var strWithoutPlus = str.replace(/\+/g, ' ');
- if (charset === 'iso-8859-1') {
- // unescape never throws, no try...catch needed:
- return strWithoutPlus.replace(/%[0-9a-f]{2}/gi, unescape);
- }
- // utf-8
- try {
- return decodeURIComponent(strWithoutPlus);
- } catch (e) {
- return strWithoutPlus;
- }
- };
-
- var encode = function encode(str, defaultEncoder, charset, kind, format) {
- // This code was originally written by Brian White (mscdex) for the io.js core querystring library.
- // It has been adapted here for stricter adherence to RFC 3986
- if (str.length === 0) {
- return str;
- }
-
- var string = str;
- if (typeof str === 'symbol') {
- string = Symbol.prototype.toString.call(str);
- } else if (typeof str !== 'string') {
- string = String(str);
- }
-
- if (charset === 'iso-8859-1') {
- return escape(string).replace(/%u[0-9a-f]{4}/gi, function ($0) {
- return '%26%23' + parseInt($0.slice(2), 16) + '%3B';
- });
- }
-
- var out = '';
- for (var i = 0; i < string.length; ++i) {
- var c = string.charCodeAt(i);
-
- if (
- c === 0x2D // -
- || c === 0x2E // .
- || c === 0x5F // _
- || c === 0x7E // ~
- || (c >= 0x30 && c <= 0x39) // 0-9
- || (c >= 0x41 && c <= 0x5A) // a-z
- || (c >= 0x61 && c <= 0x7A) // A-Z
- || (format === formats.RFC1738 && (c === 0x28 || c === 0x29)) // ( )
- ) {
- out += string.charAt(i);
- continue;
- }
-
- if (c < 0x80) {
- out = out + hexTable[c];
- continue;
- }
-
- if (c < 0x800) {
- out = out + (hexTable[0xC0 | (c >> 6)] + hexTable[0x80 | (c & 0x3F)]);
- continue;
- }
-
- if (c < 0xD800 || c >= 0xE000) {
- out = out + (hexTable[0xE0 | (c >> 12)] + hexTable[0x80 | ((c >> 6) & 0x3F)] + hexTable[0x80 | (c & 0x3F)]);
- continue;
- }
-
- i += 1;
- c = 0x10000 + (((c & 0x3FF) << 10) | (string.charCodeAt(i) & 0x3FF));
- /* eslint operator-linebreak: [2, "before"] */
- out += hexTable[0xF0 | (c >> 18)]
- + hexTable[0x80 | ((c >> 12) & 0x3F)]
- + hexTable[0x80 | ((c >> 6) & 0x3F)]
- + hexTable[0x80 | (c & 0x3F)];
- }
-
- return out;
- };
-
- var compact = function compact(value) {
- var queue = [{ obj: { o: value }, prop: 'o' }];
- var refs = [];
-
- for (var i = 0; i < queue.length; ++i) {
- var item = queue[i];
- var obj = item.obj[item.prop];
-
- var keys = Object.keys(obj);
- for (var j = 0; j < keys.length; ++j) {
- var key = keys[j];
- var val = obj[key];
- if (typeof val === 'object' && val !== null && refs.indexOf(val) === -1) {
- queue.push({ obj: obj, prop: key });
- refs.push(val);
- }
- }
- }
-
- compactQueue(queue);
-
- return value;
- };
-
- var isRegExp = function isRegExp(obj) {
- return Object.prototype.toString.call(obj) === '[object RegExp]';
- };
-
- var isBuffer = function isBuffer(obj) {
- if (!obj || typeof obj !== 'object') {
- return false;
- }
-
- return !!(obj.constructor && obj.constructor.isBuffer && obj.constructor.isBuffer(obj));
- };
-
- var combine = function combine(a, b) {
- return [].concat(a, b);
- };
-
- var maybeMap = function maybeMap(val, fn) {
- if (isArray(val)) {
- var mapped = [];
- for (var i = 0; i < val.length; i += 1) {
- mapped.push(fn(val[i]));
- }
- return mapped;
- }
- return fn(val);
- };
-
- module.exports = {
- arrayToObject: arrayToObject,
- assign: assign,
- combine: combine,
- compact: compact,
- decode: decode,
- encode: encode,
- isBuffer: isBuffer,
- isRegExp: isRegExp,
- maybeMap: maybeMap,
- merge: merge
- };
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