Mercurial > prosody-modules

annotate mod_muc_markers/mod_muc_markers.lua @ 5448:9d542e86e19a

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mod_http_oauth2: Allow requesting a subset of scopes on token refresh This enables clients to request access tokens with fewer permissions than the grant they were given, reducing impact of token leak. Clients could e.g. request access tokens with some privileges and immediately revoke them after use, or other strategies.
author Kim Alvefur <zash@zash.se>
date Thu, 11 May 2023 21:40:09 +0200
parents 6c57b9e31586
children
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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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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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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);
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126 end