prosody-modules
5aee8d86629a
mod_mamsub/mod_mamsub.lua

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mod_mamsub/mod_mamsub.lua @ 4738:5aee8d86629a

mod_bookmarks2: Fix handling of nick and password elements This form of child retrieval fails when the stanza elements internally don't have an 'xmlns' attribute, which can happen sometimes for some reason, including when they have been constructed via the stanza builder API. When that is the case then the explicit namespace arguemnt does not match the nil value of the internal attribute. Calling `:get_child()` without the namespace argument does the right thing here, with both nil and the parent namespace as valid values for the internal attribute.
author Kim Alvefur <zash@zash.se>
date Wed, 03 Nov 2021 21:11:55 +0100
parent 1748:0697fbef9134
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rev   line source
1747
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1 -- MAM Subscriptions prototype
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2 -- Copyright (C) 2015 Kim Alvefur
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3 --
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4 -- This file is MIT/X11 licensed.
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5
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6 local mt = require"util.multitable";
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7 local st = require"util.stanza";
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8
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9 local xmlns_mamsub = "http://prosody.im/protocol/mamsub";
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10
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11 module:add_feature(xmlns_mamsub);
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12
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13 local host_sessions = prosody.hosts[module.host].sessions;
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14
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15 local weak = { __mode = "k" };
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16
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17 module:hook("iq-set/self/"..xmlns_mamsub..":subscribe", function (event)
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18 local origin, stanza = event.origin, event.stanza;
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19 if origin.mamsub ~= nil then
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20 origin.send(st.error_reply(stanza, "modify", "conflict"));
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21 return true;
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22 end
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23 origin.mamsub = xmlns_mamsub;
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24 local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
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25 if not mamsub_sessions then
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26 mamsub_sessions = setmetatable({}, weak);
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27 host_sessions[origin.username].mamsub_sessions = mamsub_sessions;
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28 end
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29 mamsub_sessions[origin] = true;
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30 origin.send(st.reply(stanza));
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31 return true;
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32 end);
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33
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34 module:hook("iq-set/self/"..xmlns_mamsub..":unsubscribe", function (event)
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35 local origin, stanza = event.origin, event.stanza;
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36 if origin.mamsub ~= xmlns_mamsub then
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37 origin.send(st.error_reply(stanza, "modify", "conflict"));
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38 return true;
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39 end
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40 origin.mamsub = nil;
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41 local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
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42 if mamsub_sessions then
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43 mamsub_sessions[origin] = nil;
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44 end
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45 origin.send(st.reply(stanza));
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46 return true;
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47 end);
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48
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49 module:hook("archive-message-added", function (event)
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50 local user_session = host_sessions[event.for_user];
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51 local mamsub_sessions = user_session and user_session.mamsub_sessions;
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52 if not mamsub_sessions then return end;
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53
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54 local for_broadcast = st.message():tag("mamsub", { xmlns = xmlns_mamsub })
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55 :tag("forwarded", { xmlns = "urn:xmpp:forward:0" })
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56 :add_child(event.stanza);
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57
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58 for session in pairs(mamsub_sessions) do
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59 if session.mamsub == xmlns_mamsub then
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60 for_broadcast.attr.to = session.full_jid;
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61 session.send(for_broadcast);
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62 end
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63 end
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64 end);