annotate mod_mam/mamprefsxml.lib.lua @ 4282:281a864e7472

mod_pubsub_feeds: Don't skip publishing items after an existing one I encountered a feed which was backwards, such that older entries were considered first and then it would skip newer entries. This may however run into trouble if the feed contains more items than what's persisted in pubsub.
author Kim Alvefur <zash@zash.se>
date Mon, 30 Nov 2020 15:17:29 +0100
parents 5941aac79f06
children
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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 }