prosody
c667887d78ad
plugins/mod_mam/mamprefsxml.lib.lua

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plugins/mod_mam/mamprefsxml.lib.lua @ 9485:c667887d78ad

util.serialization: Simpler metatable pre-processing It was too difficult to describe what it did.
author Kim Alvefur <zash@zash.se>
date Fri, 12 Oct 2018 00:13:24 +0200
parent 7903:036c771b842a
child 9728:d41ce505cdf9
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1 -- Prosody IM
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Kim Alvefur <zash@zash.se>
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2 -- Copyright (C) 2008-2017 Matthew Wild
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3 -- Copyright (C) 2008-2017 Waqas Hussain
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4 -- Copyright (C) 2011-2017 Kim Alvefur
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9 -- XEP-0313: Message Archive Management for Prosody
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10 --
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11
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12 local st = require"util.stanza";
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13 local xmlns_mam = "urn:xmpp:mam:2";
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14
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15 local default_attrs = {
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16 always = true, [true] = "always",
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17 never = false, [false] = "never",
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18 roster = "roster",
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19 }
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20
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21 local function tostanza(prefs)
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22 local default = prefs[false];
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23 default = default_attrs[default];
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24 local prefstanza = st.stanza("prefs", { xmlns = xmlns_mam, default = default });
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25 local always = st.stanza("always");
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26 local never = st.stanza("never");
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27 for jid, choice in pairs(prefs) do
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28 if jid then
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29 (choice and always or never):tag("jid"):text(jid):up();
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30 end
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31 end
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32 prefstanza:add_child(always):add_child(never);
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33 return prefstanza;
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34 end
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35 local function fromstanza(prefstanza)
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36 local prefs = {};
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37 local default = prefstanza.attr.default;
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38 if default then
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39 prefs[false] = default_attrs[default];
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40 end
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41
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42 local always = prefstanza:get_child("always");
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43 if always then
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44 for rule in always:childtags("jid") do
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45 local jid = rule:get_text();
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46 prefs[jid] = true;
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47 end
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48 end
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49
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50 local never = prefstanza:get_child("never");
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51 if never then
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52 for rule in never:childtags("jid") do
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53 local jid = rule:get_text();
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54 prefs[jid] = false;
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55 end
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56 end
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57
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58 return prefs;
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59 end
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60
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61 return {
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62 tostanza = tostanza;
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63 fromstanza = fromstanza;
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64 }