prosody
d336b28b4002
util/rsm.lua

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util/rsm.lua @ 11395:d336b28b4002

mod_http_errors: Style tweak Weird to have the background all the way to the edge of the viewport. Would be nice if this could be done without the extra span.
author Kim Alvefur <zash@zash.se>
date Sun, 21 Feb 2021 07:59:17 +0100
parent 10764:1fbfcc2f6805
child 11426:c7948491c5e4
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1 -- Prosody IM
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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 stanza = require"util.stanza".stanza;
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13 local tonumber = tonumber;
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14 local s_format = string.format;
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15 local type = type;
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16 local pairs = pairs;
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17
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18 local function inttostr(n)
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19 return s_format("%d", n);
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20 end
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21
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22 local xmlns_rsm = 'http://jabber.org/protocol/rsm';
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23
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24 local element_parsers = {};
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25
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26 do
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27 local parsers = element_parsers;
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28 local function xs_int(st)
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29 return tonumber((st:get_text()));
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30 end
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31 local function xs_string(st)
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32 return st:get_text();
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33 end
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34
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35 parsers.after = xs_string;
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36 parsers.before = function(st)
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37 local text = st:get_text();
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38 return text == "" or text;
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39 end;
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40 parsers.max = xs_int;
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41 parsers.index = xs_int;
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42
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43 parsers.first = function(st)
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44 return { index = tonumber(st.attr.index); st:get_text() };
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45 end;
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46 parsers.last = xs_string;
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47 parsers.count = xs_int;
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48 end
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49
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50 local element_generators = setmetatable({
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51 first = function(st, data)
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52 if type(data) == "table" then
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53 st:tag("first", { index = inttostr(data.index) }):text(data[1]):up();
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54 else
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55 st:tag("first"):text(data):up();
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56 end
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57 end;
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58 before = function(st, data)
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59 if data == true then
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60 st:tag("before"):up();
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61 else
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62 st:tag("before"):text(data):up();
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63 end
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64 end;
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65 max = function (st, data)
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66 st:tag("max"):text(inttostr(data)):up();
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67 end;
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68 count = function (st, data)
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69 st:tag("count"):text(inttostr(data)):up();
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70 end;
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71 }, {
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72 __index = function(_, name)
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73 return function(st, data)
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74 st:tag(name):text(data):up();
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75 end
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76 end;
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77 });
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78
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79
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80 local function parse(set)
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81 local rs = {};
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82 for tag in set:childtags() do
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83 local name = tag.name;
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84 local parser = name and element_parsers[name];
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85 if parser then
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86 rs[name] = parser(tag);
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87 end
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88 end
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89 return rs;
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90 end
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91
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92 local function generate(t)
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93 local st = stanza("set", { xmlns = xmlns_rsm });
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94 for k,v in pairs(t) do
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95 if element_parsers[k] then
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96 element_generators[k](st, v);
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97 end
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98 end
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99 return st;
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100 end
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101
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102 local function get(st)
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103 local set = st:get_child("set", xmlns_rsm);
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104 if set and #set.tags > 0 then
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105 return parse(set);
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106 end
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107 end
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108
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109 return { parse = parse, generate = generate, get = get };