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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;
}());
exports.arrayToObject = function (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 (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 (Object.prototype.hasOwnProperty.call(acc, key)) {
acc[key] = exports.merge(acc[key], value, options);
} else {
acc[key] = value;
}
return acc;
}, mergeTarget);
};
exports.decode = function (str) {
try {
return decodeURIComponent(str.replace(/\+/g, ' '));
} catch (e) {
return str;
}
};
exports.encode = function (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)]; // eslint-disable-line max-len
}
return out;
};
exports.compact = function (obj, references) {
if (typeof obj !== 'object' || obj === null) {
return obj;
}
var refs = references || [];
var lookup = refs.indexOf(obj);
if (lookup !== -1) {
return refs[lookup];
}
refs.push(obj);
if (Array.isArray(obj)) {
var compacted = [];
for (var i = 0; i < obj.length; ++i) {
if (obj[i] && typeof obj[i] === 'object') {
compacted.push(exports.compact(obj[i], refs));
} else if (typeof obj[i] !== 'undefined') {
compacted.push(obj[i]);
}
}
return compacted;
}
var keys = Object.keys(obj);
keys.forEach(function (key) {
obj[key] = exports.compact(obj[key], refs);
});
return obj;
};
exports.isRegExp = function (obj) {
return Object.prototype.toString.call(obj) === '[object RegExp]';
};
exports.isBuffer = function (obj) {
if (obj === null || typeof obj === 'undefined') {
return false;
}
return !!(obj.constructor && obj.constructor.isBuffer && obj.constructor.isBuffer(obj));
};
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