prosody
43b43e7156b8
plugins/muc/presence_broadcast.lib.lua

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plugins/muc/presence_broadcast.lib.lua @ 11245:43b43e7156b8

MUC: Add support for presence probes (fixes #1535) The following patch allows Prosody to respond to `probe` presences and send out the probed occupant's current presence. This is based on line 17.3 in XEP-0045: A MUC service MAY handle presence probes sent to the room JID <room@service> or an occupant JID <room@service/nick> (e.g, these might be sent by an occupant's home server to determine if the room is still online or to synchronize presence information if the user or the user's server has gone offline temporarily or has started sharing presence again, as for instance when Stanza Interception and Filtering Technology (XEP-0273) is used).
author JC Brand <jc@opkode.com>
date Sun, 19 Apr 2020 21:49:45 +0200
parent 10687:8c2c5b4fde32
child 12977:74b9e05af71e
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 -- Copyright (C) 2014 Daurnimator
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local st = require "util.stanza";
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11
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12 local valid_roles = { "none", "visitor", "participant", "moderator" };
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13 local default_broadcast = {
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14 visitor = true;
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15 participant = true;
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16 moderator = true;
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17 };
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18
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19 local function get_presence_broadcast(room)
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20 return room._data.presence_broadcast or default_broadcast;
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21 end
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22
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23 local function set_presence_broadcast(room, broadcast_roles)
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24 broadcast_roles = broadcast_roles or default_broadcast;
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25
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26 local changed = false;
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27 local old_broadcast_roles = get_presence_broadcast(room);
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28 for _, role in ipairs(valid_roles) do
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29 if old_broadcast_roles[role] ~= broadcast_roles[role] then
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30 changed = true;
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31 end
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32 end
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33
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34 if not changed then return false; end
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35
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36 room._data.presence_broadcast = broadcast_roles;
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37
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38 for _, occupant in room:each_occupant() do
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39 local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";});
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40 local role = occupant.role or "none";
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41 if broadcast_roles[role] and not old_broadcast_roles[role] then
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42 -- Presence broadcast is now enabled, so announce existing user
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43 room:publicise_occupant_status(occupant, x);
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44 elseif old_broadcast_roles[role] and not broadcast_roles[role] then
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45 -- Presence broadcast is now disabled, so mark existing user as unavailable
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46 room:publicise_occupant_status(occupant, x, nil, nil, nil, nil, true);
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47 end
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48 end
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49
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50 return true;
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51 end
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52
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53 module:hook("muc-config-form", function(event)
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54 local values = {};
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55 for role, value in pairs(get_presence_broadcast(event.room)) do
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56 if value then
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57 values[#values + 1] = role;
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58 end
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59 end
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60
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61 table.insert(event.form, {
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62 name = "muc#roomconfig_presencebroadcast";
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63 type = "list-multi";
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64 label = "Only show participants with roles:";
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65 value = values;
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66 options = valid_roles;
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67 });
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68 end, 70-7);
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69
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70 module:hook("muc-config-submitted/muc#roomconfig_presencebroadcast", function(event)
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71 local broadcast_roles = {};
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72 for _, role in ipairs(event.value) do
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73 broadcast_roles[role] = true;
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74 end
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75 if set_presence_broadcast(event.room, broadcast_roles) then
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76 event.status_codes["104"] = true;
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77 end
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78 end);
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79
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80 return {
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81 get = get_presence_broadcast;
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82 set = set_presence_broadcast;
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83 };