prosody-modules
281a864e7472
mod_muc_markers/mod_muc_markers.lua

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mod_muc_markers/mod_muc_markers.lua @ 4282:281a864e7472

mod_pubsub_feeds: Don't skip publishing items after an existing one I encountered a feed which was backwards, such that older entries were considered first and then it would skip newer entries. This may however run into trouble if the feed contains more items than what's persisted in pubsub.
author Kim Alvefur <zash@zash.se>
date Mon, 30 Nov 2020 15:17:29 +0100
parent 4071:8e28d0918abc
child 4298:020dd0a59f1f
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1 -- Track messages received by users of the MUC
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2
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3 -- We rewrite the 'id' attribute of outgoing stanzas to match the stanza (archive) id
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4 -- This module is therefore incompatible with the muc#stable_id feature
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5 -- We rewrite the id because XEP-0333 doesn't tell clients explicitly which id to use
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6 -- in marker reports. However it implies the 'id' attribute through examples, and this
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7 -- is what some clients implement.
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8 -- Notably Conversations will ack the origin-id instead. We need to update the XEP to
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9 -- clarify the correct behaviour.
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10
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11 local set = require "util.set";
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12 local st = require "util.stanza";
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13
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14 local xmlns_markers = "urn:xmpp:chat-markers:0";
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15
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16 local marker_order = { "received", "displayed", "acknowledged" };
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17
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18 -- Add reverse mapping
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19 for priority, name in ipairs(marker_order) do
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20 marker_order[name] = priority;
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21 end
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22
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23 local marker_element_name = module:get_option_string("muc_marker_type", "displayed");
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24
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25 assert(marker_order[marker_element_name], "invalid marker name: "..marker_element_name);
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26
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27 local marker_element_names = set.new();
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28
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29 -- "displayed" implies "received", etc. so we'll add the
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30 -- chosen marker and any "higher" ones to the set
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31 for i = marker_order[marker_element_name], #marker_order do
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32 marker_element_names:add(marker_order[i]);
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33 end
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34
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35 local muc_marker_map_store = module:open_store("muc_markers", "map");
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36
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37 local function get_stanza_id(stanza, by_jid)
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38 for tag in stanza:childtags("stanza-id", "urn:xmpp:sid:0") do
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39 if tag.attr.by == by_jid then
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40 return tag.attr.id;
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41 end
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42 end
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43 return nil;
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44 end
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45
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46 module:hook("muc-broadcast-message", function (event)
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47 local stanza = event.stanza;
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48
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49 local archive_id = get_stanza_id(stanza, event.room.jid);
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50 -- We are not interested in stanzas that didn't get archived
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51 if not archive_id then return; end
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52
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53 -- Add stanza id as id attribute
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54 stanza.attr.id = archive_id;
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55 -- Add markable element to request markers from clients
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56 stanza:tag("markable", { xmlns = xmlns_markers }):up();
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57 end, -1);
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58
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59 module:hook("muc-occupant-groupchat", function (event)
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60 local marker = event.stanza:child_with_ns(xmlns_markers);
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61 if not marker or not marker_element_names:contains(marker.name) then
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62 return; -- No marker, or not one we are interested in
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63 end
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64
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65 -- Store the id that the user has received to
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66 module:log("warn", "New marker for %s in %s: %s", event.occupant.bare_jid, event.room.jid, marker.attr.id);
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67 muc_marker_map_store:set(event.occupant.bare_jid, event.room.jid, marker.attr.id);
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68
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69 end);
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70
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71 module:hook("muc-message-is-historic", function (event)
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72 local marker = event.stanza:get_child(nil, xmlns_markers)
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73
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74 -- Prevent stanza from reaching the archive (it's just noise)
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75 if marker and marker_element_names:contains(marker.name) then
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76 return false
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77 end
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78 end);
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79
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80 local function find_nickname(room, user_jid)
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81 -- Find their current nickname
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82 for nick, occupant in pairs(room._occupants) do
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83 if occupant.bare_jid == user_jid then
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84 return nick;
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85 end
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86 end
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87 -- Or if they're not here
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88 local nickname = room:get_affiliation_data(user_jid, "reserved_nickname");
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89 if nickname then return room.jid.."/"..nickname; end
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90 end
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91
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92 -- Synthesize markers
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93 if muc_marker_map_store.get_all then
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94 module:hook("muc-occupant-session-new", function (event)
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95 local room, to = event.room, event.stanza.attr.from;
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96 local markers = muc_marker_map_store:get_all(room.jid);
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97 if not markers then return end
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98 for user_jid, id in pairs(markers) do
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99 local room_nick = find_nickname(room, user_jid);
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100 if room_nick then
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101 local recv_marker = st.message({ type = "groupchat", from = room_nick, to = to })
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102 :tag(marker_element_name, { xmlns = xmlns_markers, id = id });
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103 room:route_stanza(recv_marker);
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104 end
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105 end
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106 end);
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107 end
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108
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109 -- Public API
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110 --luacheck: ignore 131
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111
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112 function get_user_read_marker(user_jid, room_jid)
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113 return muc_marker_map_store:get(user_jid, room_jid);
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114 end
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115
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116 function is_markable(stanza)
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117 return not not stanza:get_child("markable", xmlns_markers);
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118 end