annotate mod_mam/mamprefsxml.lib.lua @ 3459:471855552f49

mod_storage_xmlarchive/README: Add reminder about backups
author Kim Alvefur <zash@zash.se>
date Thu, 24 Jan 2019 13:39:33 +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 }