action_dispatch.format source code

1 module action_dispatch.format;
2 
3 class Format {
4   protected {
5     string _format;
6   }
7 
8   this(string format) {
9     _format = format;
10   }
11 
12   @property string format() {
13     return _format;
14   }
15 
16   void html(void delegate() yield) {
17     yield_for_format("html", yield);
18   }
19 
20   void json(void delegate() yield) {
21     yield_for_format("json", yield);
22   }
23 
24   void xml(void delegate() yield) {
25     yield_for_format("xml", yield);
26   }
27 
28   protected {
29     void yield_for_format(string format, void delegate() yield) {
30       if (_format == format) {
31         yield();
32       }
33     }
34   }
35 }
36 
37 unittest {
38   import dunit.toolkit;
39 
40   struct Foo { int a; }
41 
42   Foo html_foo = { a: 0 };
43   html_foo.a.assertEqual(0);
44   auto html_f = new Format("html");
45   html_f.format.assertEqual("html");
46   html_f.html(delegate void() { html_foo.a = 2; });
47   html_foo.a.assertEqual(2);
48   html_f.xml(delegate void() { html_foo.a = 3; });
49   html_foo.a.assertEqual(2);
50 
51   Foo json_foo = { a: 1 };
52   auto json_f = new Format("json");
53   json_f.format.assertEqual("json");
54   json_f.json(delegate void() { json_foo.a = 3; });
55   json_foo.a.assertEqual(3);
56   json_f.html(delegate void() { json_foo.a = 0; });
57   json_foo.a.assertEqual(3);
58 
59   Foo xml_foo = { a: 5 };
60   auto xml_f = new Format("xml");
61   xml_f.format.assertEqual("xml");
62   xml_f.xml(delegate void() { xml_foo.a = 4; });
63   xml_foo.a.assertEqual(4);
64   xml_f.json(delegate void() { xml_foo.a = 6; });
65   xml_foo.a.assertEqual(4);
66 }