1// Load modules
 2
 3var Utils = require('./utils');
 4
 5
 6// Declare internals
 7
 8var internals = {
 9    delimiter: '&',
10    indices: true
11};
12
13
14internals.stringify = function (obj, prefix, options) {
15
16    if (Utils.isBuffer(obj)) {
17        obj = obj.toString();
18    }
19    else if (obj instanceof Date) {
20        obj = obj.toISOString();
21    }
22    else if (obj === null) {
23        obj = '';
24    }
25
26    if (typeof obj === 'string' ||
27        typeof obj === 'number' ||
28        typeof obj === 'boolean') {
29
30        return [encodeURIComponent(prefix) + '=' + encodeURIComponent(obj)];
31    }
32
33    var values = [];
34
35    if (typeof obj === 'undefined') {
36        return values;
37    }
38
39    var objKeys = Object.keys(obj);
40    for (var i = 0, il = objKeys.length; i < il; ++i) {
41        var key = objKeys[i];
42        if (!options.indices &&
43            Array.isArray(obj)) {
44
45            values = values.concat(internals.stringify(obj[key], prefix, options));
46        }
47        else {
48            values = values.concat(internals.stringify(obj[key], prefix + '[' + key + ']', options));
49        }
50    }
51
52    return values;
53};
54
55
56module.exports = function (obj, options) {
57
58    options = options || {};
59    var delimiter = typeof options.delimiter === 'undefined' ? internals.delimiter : options.delimiter;
60    options.indices = typeof options.indices === 'boolean' ? options.indices : internals.indices;
61
62    var keys = [];
63
64    if (typeof obj !== 'object' ||
65        obj === null) {
66
67        return '';
68    }
69
70    var objKeys = Object.keys(obj);
71    for (var i = 0, il = objKeys.length; i < il; ++i) {
72        var key = objKeys[i];
73        keys = keys.concat(internals.stringify(obj[key], key, options));
74    }
75
76    return keys.join(delimiter);
77};