prosody
1dd09dc04945
plugins/muc/history.lib.lua

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plugins/muc/history.lib.lua @ 6215:1dd09dc04945

plugins/muc: Move history to an external module This resulted in the split up of the main muc-occupant-joined event handler into 3 seperate ones, handling occupant list, history and subject
author daurnimator <quae@daurnimator.com>
date Thu, 03 Apr 2014 15:14:52 -0400
child 6231:bc12a8253f94
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6215
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 -- Copyright (C) 2014 Daurnimator
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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
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10 local gettime = os.time;
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11 local datetime = require "util.datetime";
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12 local st = require "util.stanza";
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13
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14 local default_history_length, max_history_length = 20, math.huge;
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15
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16 local function set_max_history_length(_max_history_length)
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17 max_history_length = _max_history_length or math.huge;
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18 end
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19
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20 local function get_historylength(room)
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21 return math.min(room._data.history_length or default_history_length, max_history_length);
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22 end
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23
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24 local function set_historylength(room, length)
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25 length = assert(tonumber(length), "Length not a valid number");
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26 if length == default_history_length then length = nil; end
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27 room._data.history_length = length;
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28 return true;
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29 end
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30
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31 module:hook("muc-config-form", function(event)
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32 table.insert(event.form, {
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33 name = "muc#roomconfig_historylength";
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34 type = "text-single";
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35 label = "Maximum Number of History Messages Returned by Room";
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36 value = tostring(get_historylength(event.room));
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37 });
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38 end);
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39
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40 module:hook("muc-config-submitted", function(event)
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41 local new = event.fields["muc#roomconfig_historylength"];
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42 if new ~= nil and set_historylength(event.room, new) then
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43 event.status_codes["104"] = true;
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44 end
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45 end);
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46
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47 local function parse_history(stanza)
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48 local x_tag = stanza:get_child("x", "http://jabber.org/protocol/muc");
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49 local history_tag = x_tag and x_tag:get_child("history", "http://jabber.org/protocol/muc");
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50 if not history_tag then
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51 return nil, default_history_length, nil;
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52 end
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53
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54 local maxchars = tonumber(history_tag.attr.maxchars);
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55
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56 local maxstanzas = tonumber(history_tag.attr.maxstanzas);
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57
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58 -- messages received since the UTC datetime specified
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59 local since = history_tag.attr.since;
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60 if since then
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61 since = datetime.parse(since);
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62 end
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63
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64 -- messages received in the last "X" seconds.
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65 local seconds = tonumber(history_tag.attr.seconds);
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66 if seconds then
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67 seconds = gettime() - seconds;
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68 if since then
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69 since = math.max(since, seconds);
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70 else
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71 since = seconds;
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72 end
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73 end
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74
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75 return maxchars, maxstanzas, since;
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76 end
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77
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78 module:hook("muc-get-history", function(event)
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79 local room = event.room;
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80 local history = room._data["history"]; -- send discussion history
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81 if not history then return nil end
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82 local history_len = #history;
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83
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84 local to = event.to;
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85 local maxchars = event.maxchars;
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86 local maxstanzas = event.maxstanzas or history_len;
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87 local since = event.since;
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88 local n = 0;
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89 local charcount = 0;
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90 for i=history_len,1,-1 do
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91 local entry = history[i];
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92 if maxchars then
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93 if not entry.chars then
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94 entry.stanza.attr.to = "";
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95 entry.chars = #tostring(entry.stanza);
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96 end
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97 charcount = charcount + entry.chars + #to;
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98 if charcount > maxchars then break; end
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99 end
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100 if since and since > entry.timestamp then break; end
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101 if n + 1 > maxstanzas then break; end
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102 n = n + 1;
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103 end
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104
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105 local i = history_len-n+1
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106 function event:next_stanza()
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107 if i > history_len then return nil end
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108 local entry = history[i];
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109 local msg = entry.stanza;
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110 msg.attr.to = to;
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111 i = i + 1;
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112 return msg;
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113 end
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114 return true;
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115 end);
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116
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117 local function send_history(room, stanza)
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118 local maxchars, maxstanzas, since = parse_history(stanza);
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119 local event = {
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120 room = room;
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121 to = stanza.attr.from; -- `to` is required to calculate the character count for `maxchars`
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122 maxchars = maxchars, maxstanzas = maxstanzas, since = since;
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123 next_stanza = function() end; -- events should define this iterator
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124 };
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125 module:fire_event("muc-get-history", event);
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126 for msg in event.next_stanza, event do
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127 room:route_stanza(msg);
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128 end
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129 end
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130
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131 -- Send history on join
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132 module:hook("muc-occupant-joined", function(event)
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133 send_history(event.room, event.stanza);
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134 end, 50); -- Between occupant list (80) and subject(20)
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135
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136 -- add to history
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137 module:hook("muc-broadcast-message", function(event)
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138 local historic = event.stanza:get_child("body");
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139 if historic then
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140 local room = event.room
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141 local history = room._data["history"];
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142 if not history then history = {}; room._data["history"] = history; end
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143 local stanza = st.clone(event.stanza);
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144 stanza.attr.to = "";
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145 local ts = gettime();
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daurnimator <quae@daurnimator.com>
parents:
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146 local stamp = datetime.datetime(ts);
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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147 stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = module.host, stamp = stamp}):up(); -- XEP-0203
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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148 stanza:tag("x", {xmlns = "jabber:x:delay", from = module.host, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated)
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daurnimator <quae@daurnimator.com>
parents:
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149 local entry = { stanza = stanza, timestamp = ts };
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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150 table.insert(history, entry);
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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151 while #history > get_historylength(room) do table.remove(history, 1) end
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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152 end
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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153 end);
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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154
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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155 return {
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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156 set_max_length = set_max_history_length;
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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157 parse_history = parse_history;
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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158 send = send_history;
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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159 get_length = get_historylength;
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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160 set_length = set_historylength;
1dd09dc04945 plugins/muc: Move history to an external module
daurnimator <quae@daurnimator.com>
parents:
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161 };