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annotate mod_mamsub/mod_mamsub.lua @ 4876:0f5f2d4475b9

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mod_http_xep227: Add support for import via APIs rather than direct store manipulation In particular this transitions PEP nodes and data to be imported via mod_pep's APIs, fixing issues with importing at runtime while PEP data may already be live in RAM. Next obvious candidate for this approach is rosters, so clients get immediate roster pushes and other special handling (such as emitting subscribes to reach the desired subscription state).
author Matthew Wild <mwild1@gmail.com>
date Tue, 18 Jan 2022 17:01:18 +0000
parents 0697fbef9134
children
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985e05ac833b mod_mamsub: Experimental implementation of MAM subscriptions
Kim Alvefur <zash@zash.se>
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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);