annotate mod_muc_bot/mod_muc_bot.lua @ 5648:c217f4edfc4f

misc/mtail: Start of an mtail config Stashing it here in case anyone wants to continue working on it. Currently it's only counting log messages by level. Due to the permissions set by systemd on Prosody logs, mtail never managed to start correctly until permissions were manually relaxed.
author Kim Alvefur <zash@zash.se>
date Sun, 17 Sep 2023 13:36:30 +0200
parents 205b9d06fe6b
children
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30f2d7c3f946 mod_muc_bot: Attempt at module easing creation of stateless bots
Kim Alvefur <zash@zash.se>
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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
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4 local bots = module:get_option_set("known_bots", {});
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5
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6 module:hook("muc-occupant-groupchat", function(event)
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7 if event.occupant then return end -- skip messages from actual occupants
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8 local room = event.room;
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9
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10 if bots:contains(jid.bare(event.from)) or bots:contains(jid.host(event.from)) then
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11
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12 local nick = room:get_registered_nick(jid);
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13
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14 if not nick then
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15 -- Allow bot to specify its own nick, but we're appending '[bot]' to it.
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16 -- FIXME HATS!!!
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17 nick = event.stanza:get_child_text("nick", "http://jabber.org/protocol/nick");
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18 nick = (nick or jid.bare(event.from)) .. "[bot]";
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19 end
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20
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21 local virtual_occupant_jid = jid.prep(room.jid .. "/" .. nick, true);
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22 if not virtual_occupant_jid then
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23 module:send(st.error_reply(event.stanza, "modify", "jid-malformed", "Nickname must pass strict validation", room.jid));
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24 return true;
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25 end
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26
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27 local occupant = room:new_occupant(jid.bare(event.from), virtual_occupant_jid);
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28 local join = st.presence({from = event.from; to = virtual_occupant_jid});
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29 local dest_x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user"});
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30 occupant:set_session(event.from, join, true);
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31 room:save_occupant(occupant);
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32 room:publicise_occupant_status(occupant, dest_x);
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33 -- Inject virtual occupant to trick all the other hooks on this event that
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34 -- this is an actual legitimate participant.
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35 event.occupant = occupant;
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36
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37 end
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38 end, 66);
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39
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40 module:hook("muc-occupant-pre-join", function(event)
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41 local room = event.room;
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42 local nick = jid.resource(event.occupant.nick);
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43 if nick:sub(-5, -1) == "[bot]" then
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44 event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", "Only known bots may use the [bot] suffix", room.jid));
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45 return true;
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46 end
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47 end, 3);
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48
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49 module:hook("muc-occupant-pre-change", function(event)
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50 local room = event.room;
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51 local nick = jid.resource(event.dest_occupant.nick);
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52 if nick:sub(-5, -1) == "[bot]" then
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53 event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", "Only known bots may use the [bot] suffix", room.jid));
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54 return true;
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55 end
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56 end, 3);
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57
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58 if not module:get_option_boolean("bots_get_messages", true) then
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59 module:hook("muc-broadcast-message", function (event)
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60 event.room:broadcast(event.stanza, function (nick, occupant)
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61 if nick:sub(-5, -1) == "[bot]" or bots:contains(occupant.bare_jid) or bots:contains(jid.host(occupant.bare_jid)) then
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62 return false;
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63 else
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64 return true;
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65 end
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66 end);
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67 return true;
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68 end, -100);
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69 end
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70
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71 if module:get_option_boolean("ignore_bot_errors", true) then
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72 module:hook("message/full", function (event)
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73 local stanza = event.stanza;
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74 if stanza.attr.type == "error" then
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75 if bots:contains(jid.bare(stanza.attr.from)) or bots:contains(jid.host(stanza.attr.from)) then
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76 module:log("debug", "Ignoring error from known bot");
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77 return true;
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78 end
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79 end
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80 end, 1);
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81 end
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82
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83 assert(string.sub("foo[bot]", -5, -1) == "[bot]", "substring indicies, how do they work?");