prosody
93695bb1f0e7
plugins/muc/subject.lib.lua

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plugins/muc/subject.lib.lua @ 8567:93695bb1f0e7

luacheckrc: Reflow globals settings
author Kim Alvefur <zash@zash.se>
date Wed, 07 Mar 2018 19:19:56 +0100
parent 7401:e16b3fd0bd80
child 8606:b6b1f0f9b381
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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 muc_util = module:require "muc/util";
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13 local valid_roles = muc_util.valid_roles;
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14
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15 local function create_subject_message(from, subject)
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16 return st.message({from = from; type = "groupchat"})
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17 :tag("subject"):text(subject):up();
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18 end
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19
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20 local function get_changesubject(room)
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21 return room._data.changesubject;
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22 end
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23
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24 local function set_changesubject(room, changesubject)
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25 changesubject = changesubject and true or nil;
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26 if get_changesubject(room) == changesubject then return false; end
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27 room._data.changesubject = changesubject;
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28 return true;
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29 end
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30
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31 module:hook("muc-config-form", function(event)
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32 table.insert(event.form, {
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33 name = "muc#roomconfig_changesubject";
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34 type = "boolean";
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35 label = "Allow Occupants to Change Subject?";
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36 value = get_changesubject(event.room);
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37 });
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38 end, 100-8);
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39
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40 module:hook("muc-config-submitted/muc#roomconfig_changesubject", function(event)
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41 if set_changesubject(event.room, event.value) then
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42 event.status_codes["104"] = true;
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43 end
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44 end);
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45
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46 local function get_subject(room)
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47 -- a <message/> stanza from the room JID (or from the occupant JID of the entity that set the subject)
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48 return room._data.subject_from or room.jid, room._data.subject;
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49 end
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50
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51 local function send_subject(room, to)
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52 local msg = create_subject_message(get_subject(room));
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53 msg.attr.to = to;
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54 room:route_stanza(msg);
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55 end
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56
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57 local function set_subject(room, from, subject)
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58 if subject == "" then subject = nil; end
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59 local old_from, old_subject = get_subject(room);
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60 if old_subject == subject and old_from == from then return false; end
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61 room._data.subject_from = from;
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62 room._data.subject = subject;
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63 local msg = create_subject_message(from, subject);
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64 room:broadcast_message(msg);
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65 return true;
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66 end
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67
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68 -- Send subject to joining user
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69 module:hook("muc-occupant-session-new", function(event)
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70 send_subject(event.room, event.stanza.attr.from);
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71 end, 20);
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72
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73 -- Prosody has made the decision that messages with <subject/> are exclusively subject changes
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74 -- e.g. body will be ignored; even if the subject change was not allowed
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75 module:hook("muc-occupant-groupchat", function(event)
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76 local stanza = event.stanza;
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77 local subject = stanza:get_child("subject");
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78 if subject then
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79 local room = event.room;
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80 local occupant = event.occupant;
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81 -- Role check for subject changes
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82 local role_rank = valid_roles[occupant and occupant.role or "none"];
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83 if role_rank >= valid_roles.moderator or
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84 ( role_rank >= valid_roles.participant and get_changesubject(room) ) then -- and participant
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85 set_subject(room, occupant.nick, subject:get_text());
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86 room:save();
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87 return true;
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88 else
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89 event.origin.send(st.error_reply(stanza, "auth", "forbidden"));
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90 return true;
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91 end
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92 end
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93 end, 20);
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94
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95 return {
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96 get_changesubject = get_changesubject;
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97 set_changesubject = set_changesubject;
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98 get = get_subject;
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99 set = set_subject;
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100 send = send_subject;
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101 };