8d347a33 |
1 | structure Init :> INIT = |
2 | struct |
3 | |
4 | open Util Sql |
5 | structure C = PgClient |
6 | |
7 | exception Access of string |
8 | |
9 | fun conn () = C.conn "dbname='hcoop'" |
10 | val close = C.close |
11 | |
12 | type user = {id : int, name : string, rname : string, bal : int, joined : C.timestamp} |
13 | |
14 | val db = ref (NONE : C.conn option) |
15 | val user = ref (NONE : user option) |
16 | |
17 | fun getDb () = valOf (!db) |
18 | |
19 | fun mkUserRow [id, name, rname, bal, joined] = |
20 | {id = C.intFromSql id, name = C.stringFromSql name, rname = C.stringFromSql rname, |
21 | bal = C.intFromSql bal, joined = C.timestampFromSql joined} |
22 | | mkUserRow row = raise Fail ("Bad user row : " ^ makeSet id row) |
23 | |
24 | fun init () = |
25 | let |
26 | val c = conn () |
27 | in |
28 | C.dml c "BEGIN"; |
29 | case Web.getCgi "REMOTE_USER" of |
30 | NONE => raise Fail "Not logged in" |
31 | | SOME name => |
32 | (case C.oneOrNoRows c ($`SELECT id, name, rname, bal, joined |
33 | FROM WebUser |
34 | WHERE name=^(C.stringToSql name)`) of |
35 | NONE => raise Fail "User not found" |
36 | | SOME r => user := SOME (mkUserRow r)); |
37 | db := SOME c |
38 | end |
39 | |
40 | fun done () = |
41 | let |
42 | val db = getDb () |
43 | in |
44 | C.dml db "COMMIT"; |
45 | close db |
46 | end |
47 | |
48 | fun getUser () = valOf (!user) |
49 | fun getUserId () = #id (getUser ()) |
50 | fun getUserName () = #name (getUser ()) |
51 | |
52 | fun lookupUser id = |
53 | mkUserRow (C.oneRow (getDb ()) ($`SELECT id, name, rname, bal, joined |
54 | FROM WebUser |
55 | WHERE id = ^(C.intToSql id)`)) |
56 | |
57 | fun listUsers () = |
58 | C.map (getDb ()) mkUserRow ($`SELECT id, name, rname, bal, joined |
59 | FROM WebUser |
60 | ORDER BY name`) |
61 | |
62 | fun nextSeq (db, seq) = |
63 | case C.oneRow db ($`SELECT nextval('^(seq)')`) of |
64 | [id] => id |
65 | | _ => raise Fail "Bad next sequence val" |
66 | |
67 | fun addUser (name, rname, bal) = |
68 | let |
69 | val db = getDb () |
70 | val id = nextSeq (db, "WebUserSeq") |
71 | in |
72 | C.dml db ($`INSERT INTO WebUser (id, name, rname, bal, joined) |
73 | VALUES (^id, ^(C.stringToSql name), ^(C.stringToSql rname), ^(C.intToSql bal), CURRENT_TIMESTAMP)`); |
74 | C.intFromSql id |
75 | end |
76 | |
77 | fun modUser (user : user) = |
78 | let |
79 | val db = getDb () |
80 | in |
81 | ignore (C.dml db ($`UPDATE WebUser SET |
82 | name = ^(C.stringToSql (#name user)), rname = ^(C.stringToSql (#rname user)), |
83 | bal = ^(C.intToSql (#bal user)) |
84 | WHERE id = ^(C.intToSql (#id user))`)) |
85 | end |
86 | |
87 | fun deleteUser id = |
88 | C.dml (getDb ()) ($`DELETE FROM WebUser WHERE id = ^(C.intToSql id)`) |
89 | |
90 | fun validUsername name = |
91 | size name <= 10 |
92 | andalso CharVector.all Char.isAlpha name |
93 | |
94 | fun userNameToId name = |
95 | case C.oneOrNoRows (getDb ()) ($`SELECT id FROM WebUser WHERE name = ^(C.stringToSql name)`) of |
96 | SOME [id] => SOME (C.intFromSql id) |
97 | | _ => NONE |
98 | |
99 | end |