Mercurial > prosody-modules

annotate mod_muc_restrict_rooms/mod_muc_restrict_rooms.lua @ 4976:75b6e5df65f9

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various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents 79adec50b24d
children
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1 local st = require "util.stanza";
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2 local jid = require "util.jid";
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3 local nodeprep = require "util.encodings".stringprep.nodeprep;
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4
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5 local rooms = module:shared "muc/rooms";
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6 if not rooms then
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7 module:log("error", "This module only works on MUC components!");
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8 return;
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9 end
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11 local restrict_patterns = module:get_option("muc_restrict_matching", {});
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12 local restrict_excepts = module:get_option_set("muc_restrict_exceptions", {});
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13 local restrict_allow_admins = module:get_option_boolean("muc_restrict_allow_admins", false);
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15 local function is_restricted(room, who)
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16 -- If admins can join prohibited rooms, we allow them to
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17 if restrict_allow_admins and usermanager.is_admin(who, module.host) then
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18 module:log("debug", "Admins are allowed to enter restricted rooms (%s on %s)", who, room)
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19 return nil;
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20 end
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21
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22 -- Don't evaluate exceptions
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23 if restrict_excepts:contains(room) then
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24 module:log("debug", "Room %s is amongst restriction exceptions", room())
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25 return nil;
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26 end
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27
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28 -- Evaluate regexps of restricted patterns
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29 for pattern,reason in pairs(restrict_patterns) do
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30 if room:match(pattern) then
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31 module:log("debug", "Room %s is restricted by pattern %s, user %s is not allowed to join (%s)", room, pattern, who, reason)
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32 return reason;
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33 end
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34 end
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35
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36 return nil
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37 end
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38
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39 module:hook("presence/full", function(event)
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40 local stanza = event.stanza;
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41
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42 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Leaving events get discarded
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43 return;
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44 end
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46 -- Get the room
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47 local room = jid.split(stanza.attr.to);
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48 if not room then return; end
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49
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50 -- Get who has tried to join it
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51 local who = jid.bare(stanza.attr.from)
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52
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53 -- Checking whether room is restricted
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54 local check_restricted = is_restricted(room, who)
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55 if check_restricted ~= nil then
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56 event.allowed = false;
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57 event.stanza.attr.type = 'error';
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58 return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
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59 end
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60 end, 10);