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