inputのnameで配列表記されているものをjavascriptのデータ構造に変換する

parse_param.js

var is_array = function(value) {
    return value &&
        typeof value === 'object' &&
        typeof value.length === 'number' &&
        typeof value.splice === 'function' &&
        !(value.propertyIsEnumerable('length'));
}

function parse_param(params) {
    var build_hash;
    build_hash = function (hash, value, list) {

        if (list.length == 1) {
            if (is_array(value) && list[0] == "") {
                for (var i=0; i < value.length; i++) {
                    hash[i] = value[i];
                }
            } else {
                hash[list[0]] = value;
            }
            return hash;
        }

        var key = list.shift();
        if (!hash[key]) hash[key] = {};
        hash[key] = build_hash(hash[key], value, list);
        return hash;
    };

    ret = {};
    for (key in params) {
        if (key.match(/^(.+?)(\[.*?\]+)$/)) {
            name = RegExp.$1
            array = RegExp.$2;
            value = params[key];

            var index = [];
            var buf = array;
            while(1) {
                if (buf.match(/^\[(.*?)\](\[.*?\]*)*$/)) {
                    cur = RegExp.$1;
                    buf = RegExp.$2;
                    index.push(cur);
                } else {
                    break;
                }
            }
            index.unshift(name);
            ret = build_hash(ret, value, index);
        } else {
            ret[key] = params[key];
        }
    }

    return ret;
}

var params;
var ret;

params = {
    'list[0]': 'test1',
    'list[1]': 'test2'
};
ret = parse_param(params);
console.log(ret['list'][0]); // test1
console.log(ret['list'][1]); // test2

params = {
    'schedule[starttime][0]': '00',
    'schedule[starttime][1]': '01',
    'schedule[endtime][0]': '10',
    'schedule[endtime][1]': '11'
};
ret = parse_param(params);
console.log(ret['schedule']['starttime'][0]); // '00';
console.log(ret['schedule']['starttime'][1]); // '01';
console.log(ret['schedule']['endtime'][0]);   // '10';
console.log(ret['schedule']['endtime'][1]);   // '11';


params = {
    'schedule[starttime][0]': '00',
    'schedule[starttime][1]': '01',
    'schedule[endtime][0]': '10',
    'schedule[endtime][1]': '11',
    'name': 'uhouho'
};
ret = parse_param(params);
console.log(ret['schedule']['starttime'][0]); // '00';
console.log(ret['schedule']['starttime'][1]); // '01';
console.log(ret['schedule']['endtime'][0]); // '10';
console.log(ret['schedule']['endtime'][1]); // '11';
console.log(ret['name']); // 'uhouho';

params = {
    'list[0][name]': 'test1',
    'list[0][age]': 29,
    'list[1][name]': 'test2',
    'list[1][age]': 30
};
ret = parse_param(params);
console.log(ret['list'][0]['name']); // test1
console.log(ret['list'][0]['age']);  // 29
console.log(ret['list'][1]['name']); // test2
console.log(ret['list'][1]['age']);  // 30


params = {
    'list[]': ['test1', 'test2']
};
ret = parse_param(params);
console.log(ret['list'][0]); // test1
console.log(ret['list'][1]); // test2