all files / lib/ menu.js

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
1×
1×
 
1×
6×
6×
18×
 
 
 
1×
2×
2×
 
 
 
 
 
 
 
 
 
1×
3×
 
3×
6×
6×
4×
4×
1×
 
3×
3×
3×
3×
 
 
 
2×
 
 
 
 
 
 
 
 
 
 
1×
3×
 
3×
3×
6×
13×
 
12×
 
6×
3×
9×
3×
3×
 
 
3×
 
 
 
 
1×
 
 
 
 
var stdin = process.stdin;
var stdout = process.stdout;
 
function printTitleAndOptions(title, options) {
    stdout.write(title + ':\n');
    for(var i = 0; i < options.length; i++) {
        stdout.write((i + 1) + ') ' + options[i].title + '\n');
    }
}
 
function build(func, title, options, callback) {
    return function() {
        func(title, options, callback);
    };
}
 
/**
 * Prints a single-choice menu
 * @param title (String)
 * @param options (options Object)
 * @param callback (Function)
 */
function single(title, options, callback) {
    printTitleAndOptions(title, options);
 
    stdin.addListener('data', function (e) {
        var choose = parseInt(e.toString().trim(), 10);
        if (choose) {
            choose--;
            if (choose < 0 || choose >= options.length) {
                stdout.write('Invalid option\n');
            } else {
                stdin.removeAllListeners('data');
                options[choose].action();
                Eif(callback) {
                    return callback();
                }
            }
        } else {
            stdout.write('Invalid option\n');
        }
    });
}
 
/**
 * Prints a multi-choice menu
 * @param title (String)
 * @param options (options Object)
 * @param callback (Function)
 */
function multi(title, options, callback) {
    printTitleAndOptions(title, options);
 
    var stdin = process.openStdin();
    stdin.addListener('data', function (e) {
        var chooseStr = e.toString().replace(/\s+/g, ' ').trim().split(' ');
        var choose = chooseStr.map(function(i) { return parseInt(i, 10); });
 
        var valid = choose.every(function(i) {return i && !(i < 0 || i > options.length); });
 
        if(valid) {
            stdin.removeAllListeners('data');
            choose.forEach(function(c) { options[c - 1].action(); });
            Eif(callback) {
                return callback();
            }
        } else {
            stdout.write('Invalid option\n');
        }
    });
}
 
module.exports = {
    build: build,
    single: single,
    multi: multi
};