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annotate mod_mam/mamprefsxml.lib.lua @ 1290:c0957b904487

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mod_http_altconnect: Refactor to have module/connection method lookup in a common place
author Kim Alvefur <zash@zash.se>
date Sat, 25 Jan 2014 20:18:54 +0100
parents 0d6ab5e4bc30
children 18349533c44d
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0d6ab5e4bc30 mod_mam: Break out routines for converting prefs between XML and our internal representation into a library
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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 local xmlns_mam = "urn:xmpp:mam:tmp";
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8
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9 local global_default_policy = module:get_option("default_archive_policy", false);
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10
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11 local default_attrs = {
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12 always = true, [true] = "always",
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13 never = false, [false] = "never",
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14 roster = "roster",
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15 }
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16
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17 local function tostanza(prefs)
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18 local default = prefs[false];
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19 default = default ~= nil and default_attrs[default] or global_default_policy;
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20 local prefstanza = st.stanza("prefs", { xmlns = xmlns_mam, default = default });
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21 local always = st.stanza("always");
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22 local never = st.stanza("never");
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23 for jid, choice in pairs(prefs) do
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24 if jid then
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25 (choice and always or never):tag("jid"):text(jid):up();
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26 end
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27 end
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28 prefstanza:add_child(always):add_child(never);
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29 return prefstanza;
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30 end
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31 local function fromstanza(prefstanza)
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32 local prefs = {};
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33 local default = prefstanza.attr.default;
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34 if default then
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35 prefs[false] = default_attrs[default];
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36 end
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37
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38 local always = prefstanza:get_child("always");
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39 if always then
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40 for rule in always:childtags("jid") do
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41 local jid = rule:get_text();
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42 prefs[jid] = true;
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43 end
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44 end
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45
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46 local never = prefstanza:get_child("never");
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47 if never then
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48 for rule in never:childtags("jid") do
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49 local jid = rule:get_text();
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50 prefs[jid] = false;
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51 end
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52 end
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53
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54 return prefs;
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55 end
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56
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57 return {
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58 tostanza = tostanza;
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59 fromstanza = fromstanza;
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60 }