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annotate mod_mam_muc/mod_mam_muc.lua @ 1142:fabdaa0d99e3

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mod_mam_muc: Stap archived messages
author Kim Alvefur <zash@zash.se>
date Sat, 10 Aug 2013 21:17:12 +0200
parents 1091be1c3aba
children 8098683b6d6f
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rev   line source
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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 xmlns_mam = "urn:xmpp:mam:tmp";
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7 local xmlns_delay = "urn:xmpp:delay";
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8 local xmlns_forward = "urn:xmpp:forward:0";
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9
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10 local st = require "util.stanza";
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11 local rsm = module:require "mod_mam/rsm";
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12 local jid_bare = require "util.jid".bare;
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13 local jid_split = require "util.jid".split;
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14
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15 local getmetatable = getmetatable;
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16 local function is_stanza(x)
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17 return getmetatable(x) == st.stanza_mt;
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18 end
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19
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20 local tostring = tostring;
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21 local time_now = os.time;
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22 local m_min = math.min;
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23 local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse;
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24 local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50);
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25
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26 local advertise_archive = module:get_option_boolean("muc_log_advertise", true);
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27
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28 local archive = module:open_store("archive2", "archive");
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29 local rooms = hosts[module.host].modules.muc.rooms;
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30
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31 -- Handle archive queries
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32 module:hook("iq-get/bare/"..xmlns_mam..":query", function(event)
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33 local origin, stanza = event.origin, event.stanza;
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34 local room = jid_split(stanza.attr.to);
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35 local query = stanza.tags[1];
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36
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37 local room_obj = rooms[room];
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38 if not room_obj then
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39 return -- FIXME not found
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40 end
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41 local from = jid_bare(stanza.attr.from);
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42
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43 -- Banned or not a member of a members-only room?
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44 if room_obj._affiliations[from] == "outcast"
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45 or room_obj._data.members_only and not room_obj._affiliations[from] then
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46 return origin.send(st.error_reply(stanza, "auth", "forbidden"))
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47 end
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48
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49 local qid = query.attr.queryid;
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50
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51 -- Search query parameters
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52 local qstart = query:get_child_text("start");
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53 local qend = query:get_child_text("end");
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54 module:log("debug", "Archive query, id %s from %s until %s)",
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55 tostring(qid), qstart or "the dawn of time", qend or "now");
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56
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57 if qstart or qend then -- Validate timestamps
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58 local vstart, vend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend))
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59 if (qstart and not vstart) or (qend and not vend) then
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60 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid timestamp"))
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61 return true
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62 end
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63 qstart, qend = vstart, vend;
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64 end
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65
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66 -- RSM stuff
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67 local qset = rsm.get(query);
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68 local qmax = m_min(qset and qset.max or default_max_items, max_max_items);
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69 local reverse = qset and qset.before or false;
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70
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71 local before, after = qset and qset.before, qset and qset.after;
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72 if type(before) ~= "string" then before = nil; end
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73
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74 -- Load all the data!
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75 local data, err = archive:find(origin.username, {
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76 start = qstart; ["end"] = qend; -- Time range
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77 limit = qmax;
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78 before = before; after = after;
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79 reverse = reverse;
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80 total = true;
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81 });
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82
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83 if not data then
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84 return origin.send(st.error_reply(stanza, "cancel", "internal-server-error"));
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85 end
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86 local count = err;
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87
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88 -- Wrap it in stuff and deliver
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89 local first, last;
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90 for id, item, when in data do
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91 local fwd_st = st.message{ to = origin.full_jid }
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92 :tag("result", { xmlns = xmlns_mam, queryid = qid, id = id })
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93 :tag("forwarded", { xmlns = xmlns_forward })
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94 :tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up();
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95
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96 if not is_stanza(item) then
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97 item = st.deserialize(item);
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98 end
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99 item.attr.xmlns = "jabber:client";
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100 fwd_st:add_child(item);
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101
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102 if not first then first = id; end
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103 last = id;
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104
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105 origin.send(fwd_st);
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106 end
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107 -- That's all folks!
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108 module:log("debug", "Archive query %s completed", tostring(qid));
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109
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110 if reverse then first, last = last, first; end
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111 return origin.send(st.reply(stanza)
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112 :query(xmlns_mam):add_child(rsm.generate {
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113 first = first, last = last, count = count }));
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114 end);
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115
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116 -- Handle messages
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117 local function message_handler(event)
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118 local stanza = event.stanza;
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119 local orig_type = stanza.attr.type or "normal";
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120 local orig_to = stanza.attr.to;
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121 local orig_from = stanza.attr.from;
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122
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123 -- Only store groupchat messages
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124 if not (orig_type == "groupchat" and (stanza:get_child("body") or stanza:get_child("subject"))) then
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125 return;
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126 -- Chat states and other non-content messages, what TODO?
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127 end
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128
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129 local room = jid_split(orig_to);
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130 local room_obj = rooms[orig_to]
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131 if not room_obj then return end -- No such room
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132
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133 local nick = room_obj._jid_nick[orig_from];
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134 if not nick then return end -- Message from someone not in the room?
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135
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136 stanza.attr.from = nick;
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137 -- And stash it
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138 local ok, id = archive:append(room, time_now(), "", stanza);
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139 stanza.attr.from = orig_from;
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140 if ok and advertise_archive then
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141 stanza:tag("archived", { xmlns = xmlns_mam, by = jid_bare(orig_to), id = id }):up();
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142 end
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143 end
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144
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145 module:hook("message/bare", message_handler, 2);
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146
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147 -- TODO should we perhaps log presence as well?
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148 -- And role/affiliation changes?
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149
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150 module:add_feature(xmlns_mam);