1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
 
 
1
1
1
256
 
 
1
 
 
1
 
1
 
 
 
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
 
 
 
1
 
 
 
 
 
 
 
 
'use strict';
 
var hexTable = (function () {
    var array = new Array(256);
    for (var i = 0; i < 256; ++i) {
        array[i] = '%' + ((i < 16 ? '0' : '') + i.toString(16)).toUpperCase();
    }
 
    return array;
}());
 
var has = Object.prototype.hasOwnProperty;
 
exports.arrayToObject = function (source, options) {
    var obj = 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);
    }
 
    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.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)];
    }
 
    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);
    for (var j = 0; j < keys.length; ++j) {
        var key = keys[j];
        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));
};