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plugins/muc/history.lib.lua @ 7359:a5a080c12c96
Update every link to the documentation to use HTTPS
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sat, 16 Apr 2016 21:08:05 +0100 |
parent | 7350:24e2369b67f9 |
child | 7401:e16b3fd0bd80 |
rev | line source |
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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 = 20; |
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15 local max_history_length = module:get_option_number("max_history_messages", math.huge); |
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16 |
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17 local function set_max_history_length(_max_history_length) |
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18 max_history_length = _max_history_length or math.huge; |
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19 end |
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20 |
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21 local function get_historylength(room) |
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22 return math.min(room._data.history_length or default_history_length, max_history_length); |
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23 end |
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24 |
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25 local function set_historylength(room, length) |
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26 if length then |
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27 length = assert(tonumber(length), "Length not a valid number"); |
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28 end |
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29 if length == default_history_length then length = nil; end |
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30 room._data.history_length = length; |
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31 return true; |
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32 end |
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33 |
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34 module:hook("muc-config-form", function(event) |
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35 table.insert(event.form, { |
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36 name = "muc#roomconfig_historylength"; |
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37 type = "text-single"; |
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38 label = "Maximum Number of History Messages Returned by Room"; |
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39 value = tostring(get_historylength(event.room)); |
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40 }); |
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41 end); |
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42 |
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43 module:hook("muc-config-submitted/muc#roomconfig_historylength", function(event) |
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44 if set_historylength(event.room, event.value) then |
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45 event.status_codes["104"] = true; |
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46 end |
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47 end); |
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48 |
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49 local function parse_history(stanza) |
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50 local x_tag = stanza:get_child("x", "http://jabber.org/protocol/muc"); |
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51 local history_tag = x_tag and x_tag:get_child("history", "http://jabber.org/protocol/muc"); |
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52 if not history_tag then |
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53 return nil, default_history_length, nil; |
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54 end |
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55 |
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56 local maxchars = tonumber(history_tag.attr.maxchars); |
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57 |
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58 local maxstanzas = tonumber(history_tag.attr.maxstanzas); |
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59 |
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60 -- messages received since the UTC datetime specified |
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61 local since = history_tag.attr.since; |
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62 if since then |
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63 since = datetime.parse(since); |
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64 end |
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65 |
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66 -- messages received in the last "X" seconds. |
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67 local seconds = tonumber(history_tag.attr.seconds); |
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68 if seconds then |
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69 seconds = gettime() - seconds; |
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70 if since then |
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71 since = math.max(since, seconds); |
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72 else |
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73 since = seconds; |
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74 end |
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75 end |
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76 |
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77 return maxchars, maxstanzas, since; |
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78 end |
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79 |
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80 module:hook("muc-get-history", function(event) |
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81 local room = event.room; |
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82 local history = room._history; -- send discussion history |
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83 if not history then return nil end |
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84 local history_len = #history; |
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85 |
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86 local to = event.to; |
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87 local maxchars = event.maxchars; |
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88 local maxstanzas = event.maxstanzas or history_len; |
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89 local since = event.since; |
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90 local n = 0; |
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91 local charcount = 0; |
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92 for i=history_len,1,-1 do |
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93 local entry = history[i]; |
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94 if maxchars then |
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95 if not entry.chars then |
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96 entry.stanza.attr.to = ""; |
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97 entry.chars = #tostring(entry.stanza); |
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98 end |
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99 charcount = charcount + entry.chars + #to; |
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100 if charcount > maxchars then break; end |
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101 end |
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102 if since and since > entry.timestamp then break; end |
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103 if n + 1 > maxstanzas then break; end |
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104 n = n + 1; |
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105 end |
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106 |
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107 local i = history_len-n+1 |
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108 function event.next_stanza() |
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109 if i > history_len then return nil end |
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110 local entry = history[i]; |
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111 local msg = entry.stanza; |
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112 msg.attr.to = to; |
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113 i = i + 1; |
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114 return msg; |
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115 end |
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116 return true; |
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117 end); |
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118 |
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119 local function send_history(room, stanza) |
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120 local maxchars, maxstanzas, since = parse_history(stanza); |
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121 local event = { |
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122 room = room; |
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123 to = stanza.attr.from; -- `to` is required to calculate the character count for `maxchars` |
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124 maxchars = maxchars, maxstanzas = maxstanzas, since = since; |
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125 next_stanza = function() end; -- events should define this iterator |
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126 }; |
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127 module:fire_event("muc-get-history", event); |
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128 for msg in event.next_stanza, event do |
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129 room:route_stanza(msg); |
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130 end |
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131 end |
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132 |
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133 -- Send history on join |
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134 module:hook("muc-occupant-session-new", function(event) |
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135 send_history(event.room, event.stanza); |
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136 end, 50); -- Before subject(20) |
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137 |
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138 -- add to history |
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139 module:hook("muc-add-history", function(event) |
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140 local historic = event.stanza:get_child("body"); |
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141 if historic then |
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142 local room = event.room |
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143 local history = room._history; |
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144 if not history then history = {}; room._history = history; end |
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145 local stanza = st.clone(event.stanza); |
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146 stanza.attr.to = ""; |
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147 local ts = gettime(); |
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148 local stamp = datetime.datetime(ts); |
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149 stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = module.host, stamp = stamp}):up(); -- XEP-0203 |
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150 stanza:tag("x", {xmlns = "jabber:x:delay", from = module.host, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated) |
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151 local entry = { stanza = stanza, timestamp = ts }; |
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152 table.insert(history, entry); |
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153 while #history > get_historylength(room) do table.remove(history, 1) end |
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154 end |
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155 return true; |
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156 end, -1); |
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157 |
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158 -- Have a single muc-add-history event, so that plugins can mark it |
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159 -- as handled without stopping other muc-broadcast-message handlers |
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160 module:hook("muc-broadcast-message", function(event) |
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161 module:fire_event("muc-add-history", event); |
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162 end); |
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163 |
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164 return { |
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165 set_max_length = set_max_history_length; |
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166 parse_history = parse_history; |
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167 send = send_history; |
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168 get_length = get_historylength; |
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169 set_length = set_historylength; |
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170 }; |