prosody-modules
ecfd7aece33b
mod_muc_markers/mod_muc_markers.lua

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mod_muc_markers/mod_muc_markers.lua @ 5691:ecfd7aece33b

mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Oct 2023 18:34:39 +0200
parent 4694:6c57b9e31586
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rev   line source
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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 local marker_summary_on_join = module:get_option_boolean("muc_marker_summary_on_join", true);
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25 local rewrite_id_attribute = module:get_option_boolean("muc_marker_rewrite_id", false);
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27 assert(marker_order[marker_element_name], "invalid marker name: "..marker_element_name);
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28
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29 local marker_element_names = set.new();
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30
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31 -- "displayed" implies "received", etc. so we'll add the
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32 -- chosen marker and any "higher" ones to the set
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33 for i = marker_order[marker_element_name], #marker_order do
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34 marker_element_names:add(marker_order[i]);
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35 end
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36
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37 local muc_marker_map_store = module:open_store("muc_markers", "map");
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38
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39 local function get_stanza_id(stanza, by_jid)
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40 for tag in stanza:childtags("stanza-id", "urn:xmpp:sid:0") do
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41 if tag.attr.by == by_jid then
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42 return tag.attr.id;
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43 end
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44 end
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45 return nil;
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46 end
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47
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48 module:hook("muc-broadcast-message", function (event)
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49 local stanza = event.stanza;
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50
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51 local archive_id = get_stanza_id(stanza, event.room.jid);
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52 -- We are not interested in stanzas that didn't get archived
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53 if not archive_id then return; end
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54
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55 if rewrite_id_attribute then
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56 -- Add stanza id as id attribute
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57 stanza.attr.id = archive_id;
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58 end
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59
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60 -- Add markable element to request markers from clients
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61 stanza:tag("markable", { xmlns = xmlns_markers }):up();
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62 end, -1);
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63
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64 module:hook("muc-occupant-groupchat", function (event)
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65 local marker = event.stanza:child_with_ns(xmlns_markers);
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66 if not marker or not marker_element_names:contains(marker.name) then
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67 return; -- No marker, or not one we are interested in
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68 end
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69
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70 -- Store the id that the user has received to
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71 module:log("warn", "New marker for %s in %s: %s", event.occupant.bare_jid, event.room.jid, marker.attr.id);
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72 muc_marker_map_store:set(event.occupant.bare_jid, event.room.jid, marker.attr.id);
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73
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74 end);
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75
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76 module:hook("muc-message-is-historic", function (event)
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77 local marker = event.stanza:get_child(nil, xmlns_markers);
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78
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79 if marker and marker.name ~= "markable" then
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80 -- Prevent stanza from reaching the archive (it's just noise)
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81 return false;
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82 end
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83 end);
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84
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85 local function find_nickname(room, user_jid)
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86 -- Find their current nickname
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87 for nick, occupant in pairs(room._occupants) do
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88 if occupant.bare_jid == user_jid then
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89 return nick;
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90 end
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91 end
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92 -- Or if they're not here
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93 local nickname = room:get_affiliation_data(user_jid, "reserved_nickname");
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94 if nickname then return room.jid.."/"..nickname; end
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95 end
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96
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97 -- Synthesize markers
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98 if muc_marker_map_store.get_all then
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99 module:hook("muc-occupant-session-new", function (event)
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100 if not marker_summary_on_join then
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101 return;
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102 end
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103 local room, to = event.room, event.stanza.attr.from;
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104 local markers = muc_marker_map_store:get_all(room.jid);
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105 if not markers then return end
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106 for user_jid, id in pairs(markers) do
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107 local room_nick = find_nickname(room, user_jid);
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108 if room_nick then
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109 local recv_marker = st.message({ type = "groupchat", from = room_nick, to = to })
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110 :tag(marker_element_name, { xmlns = xmlns_markers, id = id });
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111 room:route_stanza(recv_marker);
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112 end
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113 end
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114 end);
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115 end
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116
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117 -- Public API
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118 --luacheck: ignore 131
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119
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120 function get_user_read_marker(user_jid, room_jid)
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121 return muc_marker_map_store:get(user_jid, room_jid);
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122 end
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123
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124 function is_markable(stanza)
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125 return not not stanza:get_child("markable", xmlns_markers);
554f64c8d0c0 mod_muc_markers: Expose is_markable utility function to other modules
Matthew Wild <mwild1@gmail.com>
parents: 4033
diff changeset
126 end