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comparison plugins/muc/restrict_pm.lib.lua @ 13495:47e1df2d0a37

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MUC: Add per-room PM restriction functionality (thanks Wirlaburla) Based on mod_muc_restrict_pm in prosody-modules d82c0383106a
author Matthew Wild <mwild1@gmail.com>
date Thu, 23 May 2024 17:39:20 +0100
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children 5fb7b9a9346f
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13494:4c3d6ed9c823 13495:47e1df2d0a37
1 -- Based on code from mod_muc_restrict_pm in prosody-modules@d82c0383106a
2 -- by Nicholas George <wirlaburla@worlio.com>
3
4 local st = require "util.stanza";
5 local muc_util = module:require "muc/util";
6 local valid_roles = muc_util.valid_roles;
7
8 -- COMPAT w/ prosody-modules allow_pm
9 local compat_map = {
10 everyone = "visitor";
11 participants = "participant";
12 moderators = "moderator";
13 members = "affiliated";
14 };
15
16 local function get_allow_pm(room)
17 local val = room._data.allow_pm;
18 return compat_map[val] or val or "visitor";
19 end
20
21 local function set_allow_pm(room, val)
22 if get_allow_pm(room) == val then return false; end
23 room._data.allow_pm = val;
24 return true;
25 end
26
27 local function get_allow_modpm(room)
28 return room._data.allow_modpm or false;
29 end
30
31 local function set_allow_modpm(room, val)
32 if get_allow_modpm(room) == val then return false; end
33 room._data.allow_modpm = val;
34 return true;
35 end
36
37 module:hook("muc-config-form", function(event)
38 local pmval = get_allow_pm(event.room);
39 table.insert(event.form, {
40 name = 'muc#roomconfig_allowpm';
41 type = 'list-single';
42 label = 'Allow private messages from';
43 options = {
44 { value = 'visitor', label = 'Everyone', default = pmval == 'visitor' };
45 { value = 'participant', label = 'Participants', default = pmval == 'participant' };
46 { value = 'moderator', label = 'Moderators', default = pmval == 'moderator' };
47 { value = 'affiliated', label = "Members", default = pmval == "affiliated" };
48 { value = 'none', label = 'No one', default = pmval == 'none' };
49 }
50 });
51 table.insert(event.form, {
52 name = '{xmpp:prosody.im}muc#allow_modpm';
53 type = 'boolean';
54 label = 'Always allow private messages to moderators';
55 value = get_allow_modpm(event.room)
56 });
57 end);
58
59 module:hook("muc-config-submitted/muc#roomconfig_allowpm", function(event)
60 if set_allow_pm(event.room, event.value) then
61 event.status_codes["104"] = true;
62 end
63 end);
64
65 module:hook("muc-config-submitted/{xmpp:prosody.im}muc#allow_modpm", function(event)
66 if set_allow_modpm(event.room, event.value) then
67 event.status_codes["104"] = true;
68 end
69 end);
70
71 local who_restricted = {
72 none = "in this group";
73 participant = "from guests";
74 moderator = "from non-moderators";
75 affiliated = "from non-members";
76 };
77
78 module:hook("muc-private-message", function(event)
79 local stanza, room = event.stanza, event.room;
80 local from_occupant = room:get_occupant_by_nick(stanza.attr.from);
81 local to_occupant = room:get_occupant_by_nick(stanza.attr.to);
82
83 -- To self is always okay
84 if to_occupant.bare_jid == from_occupant.bare_jid then return; end
85
86 if get_allow_modpm(room) then
87 if to_occupant and to_occupant.role == 'moderator'
88 or from_occupant and from_occupant.role == "moderator" then
89 return; -- Allow to/from moderators
90 end
91 end
92
93 local pmval = get_allow_pm(room);
94
95 if pmval ~= "none" then
96 if pmval == "affiliated" and room:get_affiliation(from_occupant.bare_jid) then
97 return; -- Allow from affiliated users
98 elseif valid_roles[from_occupant.role] >= valid_roles[pmval] then
99 module:log("debug", "Allowing PM: %s(%d) >= %s(%d)", from_occupant.role, valid_roles[from_occupant.role], pmval, valid_roles[pmval]);
100 return; -- Allow from a permitted role
101 end
102 end
103
104 local msg = ("Private messages are restricted %s"):format(who_restricted[pmval]);
105 module:log("debug", "Blocking PM from %s %s: %s", from_occupant.role, stanza.attr.from, msg);
106
107 room:route_to_occupant(
108 from_occupant,
109 st.error_reply(stanza, "cancel", "policy-violation", msg, room.jid)
110 );
111 return false;
112 end, 1);
113
114 return {
115 get_allow_pm = get_allow_pm;
116 set_allow_pm = set_allow_pm;
117 get_allow_modpm = get_allow_modpm;
118 set_allow_modpm = set_allow_modpm;
119 };