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1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | *) | |
18 | ||
19 | (* Configuring e-mail aliases *) | |
20 | ||
21 | structure Alias :> ALIAS = struct | |
22 | ||
23 | open Ast | |
24 | ||
e0b0abd2 | 25 | structure SM = DataStructures.StringMap |
629a34f6 | 26 | |
a6b60abf | 27 | val aliases : Domain.files SM.map ref = ref SM.empty |
e0b0abd2 | 28 | fun aliasesF node = valOf (SM.find (!aliases, node)) |
629a34f6 | 29 | |
a6b60abf | 30 | val aliasesD : Domain.files SM.map ref = ref SM.empty |
e0b0abd2 AC |
31 | fun aliasesDF node = valOf (SM.find (!aliasesD, node)) |
32 | ||
33 | fun write nodes = | |
34 | let | |
35 | val files = map (fn node => aliasesF node) nodes | |
36 | in | |
a6b60abf AC |
37 | (fn s => app (fn file => #write file s) files, |
38 | fn () => app (fn file => #writeDom file ()) files) | |
e0b0abd2 AC |
39 | end |
40 | ||
41 | fun writeD nodes = | |
42 | let | |
43 | val files = map (fn node => aliasesDF node) nodes | |
44 | in | |
a6b60abf AC |
45 | (fn s => app (fn file => #write file s) files, |
46 | fn () => app (fn file => #writeDom file ()) files) | |
e0b0abd2 AC |
47 | end |
48 | ||
49 | fun openInAll base = foldl (fn (node, r) => | |
50 | SM.insert (r, | |
51 | node, | |
a6b60abf | 52 | Domain.domainsFile {node = node, name = base})) |
2ed6d0e5 | 53 | SM.empty Domain.nodes |
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54 | |
55 | val _ = Domain.registerBefore | |
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56 | (fn _ => (aliases := openInAll "aliases"; |
57 | aliasesD := openInAll "aliases.default")) | |
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58 | |
59 | val _ = Domain.registerAfter | |
a6b60abf AC |
60 | (fn _ => (SM.app (fn file => #close file ()) (!aliases); |
61 | SM.app (fn file => #close file ()) (!aliasesD))) | |
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62 | |
63 | fun validEmailUser s = | |
64 | size s > 0 andalso size s < 50 | |
65 | andalso CharVector.all (fn ch => Char.isAlphaNum ch | |
66 | orelse ch = #"." | |
67 | orelse ch = #"_" | |
68 | orelse ch = #"-" | |
69 | orelse ch = #"+") s | |
70 | ||
71 | val _ = Env.type_one "emailUser" | |
72 | Env.string | |
73 | validEmailUser | |
74 | ||
75 | fun validEmail s = | |
76 | case String.fields (fn ch => ch = #"@") s of | |
77 | [user] => validEmailUser user | |
78 | | [user, host] => validEmailUser user andalso Domain.validDomain host | |
79 | | _ => false | |
80 | ||
81 | val _ = Env.type_one "email" | |
82 | Env.string | |
83 | validEmail | |
84 | ||
85 | datatype aliasSource = | |
86 | User of string | |
87 | | Default | |
88 | | CatchAll | |
89 | ||
90 | val source = fn (EApp ((EVar "userSource", _), e), _) => | |
91 | Option.map User (Env.string e) | |
92 | | (EVar "defaultSource", _) => SOME Default | |
93 | | (EVar "catchAllSource", _) => SOME CatchAll | |
94 | | _ => NONE | |
95 | ||
96 | datatype aliasTarget = | |
97 | Address of string | |
98 | | Addresses of string list | |
99 | | Drop | |
100 | ||
101 | val target = fn (EApp ((EVar "addressTarget", _), e), _) => | |
102 | Option.map Address (Env.string e) | |
103 | | (EApp ((EVar "addressesTarget", _), e), _) => | |
104 | Option.map Addresses (Env.list Env.string e) | |
105 | | (EVar "dropTarget", _) => SOME Drop | |
106 | | _ => NONE | |
107 | ||
108 | fun localhostify s = | |
109 | let | |
110 | val (prefix, suffix) = Substring.splitl (fn ch => ch <> #"@") (Substring.full s) | |
111 | in | |
112 | if Substring.size suffix = 0 then | |
113 | s ^ "@localhost" | |
114 | else | |
115 | s | |
116 | end | |
117 | ||
e0b0abd2 AC |
118 | fun writeSource (env, s, t) = |
119 | let | |
120 | val nodes = Env.env (Env.list Env.string) (env, "MailNodes") | |
121 | ||
a6b60abf AC |
122 | val (write, writeDom) = write nodes |
123 | val (writeD, writeDomD) = writeD nodes | |
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124 | |
125 | fun writeTarget (writer, t) = | |
126 | case t of | |
127 | Address s => writer (localhostify s) | |
128 | | Addresses [] => writer "!" | |
129 | | Addresses ss => writer (String.concatWith "," (map localhostify ss)) | |
130 | | Drop => writer "!" | |
131 | in | |
132 | case s of | |
133 | User s => (write s; | |
134 | write "@"; | |
a6b60abf | 135 | writeDom (); |
e0b0abd2 AC |
136 | write ": "; |
137 | writeTarget (write, t); | |
138 | write "\n") | |
139 | | Default => (write "*@"; | |
a6b60abf | 140 | writeDom (); |
e0b0abd2 AC |
141 | write ": "; |
142 | writeTarget (write, t); | |
143 | write "\n") | |
144 | | CatchAll => (writeD "*@"; | |
a6b60abf | 145 | writeDomD (); |
e0b0abd2 AC |
146 | writeD ": "; |
147 | writeTarget (writeD, t); | |
148 | writeD "\n") | |
149 | end | |
150 | ||
151 | val _ = Env.actionV_two "aliasPrim" | |
152 | ("from", source, "to", target) | |
153 | writeSource | |
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154 | |
155 | end |