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
|
(* Forum -- forum subapp
Copyright (C) 2013 Benjamin Barenblat <bbaren@mit.edu>
This file is a part of 6.947.
6.947 is is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option) any
later version.
6.947 is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU Affero General Public License for more
details.
You should have received a copy of the GNU Affero General Public License along
with 6.947. If not, see <http://www.gnu.org/licenses/>. *)
functor Make(Template : sig
val generic : option string -> xbody -> page
end) = struct
open Styles
table question : { Id : int,
Title : string,
Body : string,
Asker : option string (* 'None' if anonymous *)
} PRIMARY KEY Id
sequence questionIdS
fun prettyPrintQuestion row : xbody =
<xml>
<p>{[row.Question.Title]}: {[row.Question.Body]} (asked by {[row.Question.Asker]})</p>
</xml>
fun main () : transaction page =
newestQuestions <- queryX (SELECT * FROM question) prettyPrintQuestion;
return (
Template.generic (Some "Forum") <xml>
<div class={content}>
<p>All questions:</p>
{newestQuestions}
<p>Ask a new question:</p>
<form>
<textbox {#Title} size=80 /><br />
<textarea {#Body} rows=12 cols=80 /><br />
<submit action={ask} value="Ask" />
</form>
</div>
</xml>
)
and ask submission =
id <- nextval questionIdS;
dml (INSERT INTO question (Id, Title, Body, Asker)
VALUES ({[id]}, {[submission.Title]}, {[submission.Body]}, {[Some "test user"]}));
main ()
end
|