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annotate mod_mam/mamprefsxml.lib.lua @ 3656:3e0f4d727825

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mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:46:43 +0200
parents 5941aac79f06
children
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Kim Alvefur <zash@zash.se>
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1 -- XEP-0313: Message Archive Management for Prosody
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2 -- Copyright (C) 2011-2013 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 st = require"util.stanza";
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7
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8 local default_attrs = {
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9 always = true, [true] = "always",
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10 never = false, [false] = "never",
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11 roster = "roster",
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12 }
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13
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14 local function tostanza(prefs, xmlns_mam)
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15 local default = prefs[false];
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16 default = default_attrs[default];
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17 local prefstanza = st.stanza("prefs", { xmlns = xmlns_mam, default = default });
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18 local always = st.stanza("always");
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19 local never = st.stanza("never");
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20 for jid, choice in pairs(prefs) do
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21 if jid then
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22 (choice and always or never):tag("jid"):text(jid):up();
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23 end
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24 end
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25 prefstanza:add_child(always):add_child(never);
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26 return prefstanza;
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27 end
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28 local function fromstanza(prefstanza)
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29 local prefs = {};
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30 local default = prefstanza.attr.default;
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31 if default then
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32 prefs[false] = default_attrs[default];
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33 end
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34
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35 local always = prefstanza:get_child("always");
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36 if always then
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37 for rule in always:childtags("jid") do
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38 local jid = rule:get_text();
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39 prefs[jid] = true;
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40 end
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41 end
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42
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43 local never = prefstanza:get_child("never");
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44 if never then
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45 for rule in never:childtags("jid") do
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46 local jid = rule:get_text();
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47 prefs[jid] = false;
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48 end
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49 end
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50
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51 return prefs;
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52 end
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53
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54 return {
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55 tostanza = tostanza;
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56 fromstanza = fromstanza;
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57 }