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annotate mod_mam/rsm.lib.lua @ 737:e4ea03b060ed

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mod_archive: switch from/to The XEP-0136 is not very explicit about the meening of <from> and <to> elements, but the examples are clear: <from> means it comes from the user in the 'with' attribute of the collection. That is the opposite of what is currently implemented in that module. So for better compatibility with complient clients, this switch the 'from' and 'to' fields
author Olivier Goffart <ogoffart@woboq.com>
date Wed, 04 Jul 2012 14:08:43 +0200
parents 57206f8f7b09
children 479df3e0b012
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
701
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1 local stanza = require"util.stanza".stanza;
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2 local tostring, tonumber = tostring, tonumber;
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3 local type = type;
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4 local pairs = pairs;
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5
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6 local xmlns_rsm = 'http://jabber.org/protocol/rsm';
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7
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8 local element_parsers;
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9
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10 do
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11 local function xs_int(st)
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12 return tonumber((st:get_text()));
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13 end
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14 local function xs_string(st)
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15 return st:get_text();
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16 end
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17
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18 element_parsers = {
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19 after = xs_string;
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20 before = function(st)
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21 return st:get_text() or true;
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22 end;
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23 max = xs_int;
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24 index = xs_int;
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25
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26 first = function(st)
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27 return { index = tonumber(st.attr.index); st:get_text() };
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28 end;
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29 last = xs_string;
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30 count = xs_int;
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31 }
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32 end
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33
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34 local element_generators = setmetatable({
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35 first = function(st, data)
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36 if type(data) == "table" then
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37 st:tag("first", { index = data.index }):text(data[1]):up();
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38 else
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39 st:tag("first"):text(tostring(data)):up();
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40 end
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41 end;
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42 }, {
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43 __index = function(_, name)
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44 return function(st, data)
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45 st:tag(name):text(tostring(data)):up();
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46 end
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47 end;
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48 });
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49
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50
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51 local function parse(stanza)
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52 local rs = {};
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53 for tag in stanza:childtags() do
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54 local name = tag.name;
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55 local parser = name and element_parsers[name];
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56 if parser then
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57 rs[name] = parser(tag);
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58 end
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59 end
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60 return rs;
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61 end
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62
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63 local function generate(t)
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64 local st = stanza("set", { xmlns = xmlns_rsm });
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65 for k,v in pairs(t) do
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66 if element_parsers[k] then
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67 element_generators[k](st, v);
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68 end
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69 end
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70 return st;
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71 end
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72
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73 local function get(st)
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74 local set = st:get_child("set", xmlns_rsm);
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75 if set and #set.tags > 0 then
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76 return parse(set);
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77 end
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78 end
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79
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80 return { parse = parse, generate = generate, get = get };