prosody-modules
2f189f022b84
mod_muc_occupant_id/mod_muc_occupant_id.lua

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mod_muc_occupant_id/mod_muc_occupant_id.lua @ 3834:2f189f022b84

mod_muc_occupant_id: Simplify handling of occupants (all into one function)
author Maxime “pep” Buquet <pep@bouah.net>
date Sat, 04 Jan 2020 19:47:55 +0100
parent 3831:435f5b4ebd06
child 3835:5258f0afa8b4
comparison
equal deleted inserted replaced
3833:580862decd77 3834:2f189f022b84
11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0"; 11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0";
12 12
13 local function generate_id(occupant, room) 13 local function generate_id(occupant, room)
14 local bare = occupant.bare_jid; 14 local bare = occupant.bare_jid;
15 15
16 -- TODO: Move the salt on the MUC component. Setting the salt on the room
17 -- can be problematic when the room is destroyed. Next time it's recreated
18 -- the salt will be different and so will be the unique_id. Or maybe we want
19 -- this anyway?
20 if room._data.occupant_id_salt == nil then 16 if room._data.occupant_id_salt == nil then
21 local salt = uuid.generate(); 17 room._data.occupant_id_salt = uuid.generate();
22 room._data.occupant_id_salt = salt;
23 end 18 end
24 19
25 return b64encode(hmac_sha256(bare, room._data.occupant_id_salt)); 20 if room._data.occupant_ids == nil then
21 room._data.occupant_ids = {};
22 end
23
24 if room._data.occupant_ids[bare] == nil then
25 local unique_id = b64encode(hmac_sha256(bare, room._data.occupant_id_salt));
26 room._data.occupant_ids[bare] = unique_id;
27 end
28
29 return room._data.occupant_ids[bare];
26 end 30 end
27 31
28 local function edit_occupant(event) 32 local function update_occupant(event)
29 local unique_id = generate_id(event.occupant, event.room);
30
31 -- TODO: Store this only once per bare jid and not once per occupant?
32 local stanza = event.stanza;
33 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id })
34 :text(unique_id)
35 :up();
36 end
37
38 local function handle_stanza(event)
39 local stanza, occupant, room = event.stanza, event.occupant, event.room; 33 local stanza, occupant, room = event.stanza, event.occupant, event.room;
40 34
41 -- strip any existing <occupant-id/> tags to avoid forgery 35 -- strip any existing <occupant-id/> tags to avoid forgery
42 stanza:remove_children("occupant-id", xmlns_occupant_id); 36 stanza:remove_children("occupant-id", xmlns_occupant_id);
43 37
44 local occupant_tag = occupant.sessions[stanza.attr.from] 38 local unique_id = generate_id(occupant, room);
45 :get_child("occupant-id", xmlns_occupant_id);
46
47 local unique_id;
48 if occupant_tag == nil then
49 unique_id = generate_id(occupant, room);
50 else
51 unique_id = occupant.sessions[stanza.attr.from]
52 :get_child("occupant-id", xmlns_occupant_id)
53 :get_text();
54 end
55
56 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id }) 39 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id })
57 :text(unique_id) 40 :text(unique_id)
58 :up(); 41 :up();
59 end 42 end
60 43
61 module:add_feature(xmlns_occupant_id); 44 module:add_feature(xmlns_occupant_id);
62 module:hook("muc-disco#info", function (event) 45 module:hook("muc-disco#info", function (event)
63 event.reply:tag("feature", { var = xmlns_occupant_id }):up(); 46 event.reply:tag("feature", { var = xmlns_occupant_id }):up();
64 end); 47 end);
65 48
66 module:hook("muc-occupant-pre-join", edit_occupant); 49 module:hook("muc-occupant-pre-join", update_occupant);
67 module:hook("muc-occupant-groupchat", handle_stanza); 50 module:hook("muc-occupant-groupchat", update_occupant);