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'use strict';
var has = Object.prototype.hasOwnProperty;
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) {
var obj;
while (queue.length) {
var item = queue.pop();
obj = item.obj[item.prop];
if (Array.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;
}
}
return obj;
};
exports.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;
};
exports.merge = function merge(target, source, options) {
if (!source) {
return target;
}
if (typeof source !== 'object') {
if (Array.isArray(target)) {
target.push(source);
} else if (typeof target === 'object') {
if (options.plainObjects || options.allowPrototypes || !has.call(Object.prototype, source)) {
target[source] = true;
}
} else {
return [target, source];
}
return target;
}
if (typeof target !== 'object') {
return [target].concat(source);
}
var mergeTarget = target;
if (Array.isArray(target) && !Array.isArray(source)) {
mergeTarget = exports.arrayToObject(target, options);
}
if (Array.isArray(target) && Array.isArray(source)) {
source.forEach(function (item, i) {
if (has.call(target, i)) {
if (target[i] && typeof target[i] === 'object') {
target[i] = exports.merge(target[i], 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] = exports.merge(acc[key], value, options);
} else {
acc[key] = value;
}
return acc;
}, mergeTarget);
};
exports.assign = function assignSingleSource(target, source) {
return Object.keys(source).reduce(function (acc, key) {
acc[key] = source[key];
return acc;
}, target);
};
exports.decode = function (str) {
try {
return decodeURIComponent(str.replace(/\+/g, ' '));
} catch (e) {
return str;
}
};
exports.encode = function encode(str) {
// 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 = typeof str === 'string' ? str : String(str);
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
) {
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));
out += hexTable[0xF0 | (c >> 18)]
+ hexTable[0x80 | ((c >> 12) & 0x3F)]
+ hexTable[0x80 | ((c >> 6) & 0x3F)]
+ hexTable[0x80 | (c & 0x3F)];
}
return out;
};
exports.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);
}
}
}
return compactQueue(queue);
};
exports.isRegExp = function isRegExp(obj) {
return Object.prototype.toString.call(obj) === '[object RegExp]';
};
exports.isBuffer = function isBuffer(obj) {
if (obj === null || typeof obj === 'undefined') {
return false;
}
return !!(obj.constructor && obj.constructor.isBuffer && obj.constructor.isBuffer(obj));
};
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