prosody-modules
cade7dac6159
mod_mam/mod_mam.lua

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mod_mam/mod_mam.lua @ 619:cade7dac6159

mod_mam: Try to not bork when sending a message to your bare jid
author Kim Alvefur <zash@zash.se>
date Tue, 28 Feb 2012 14:36:05 +0100
parent 559:6be3a130c810
child 620:648e75c9d3e7
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1 -- XEP-xxxx: Message Archive Management for Prosody
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2 -- Copyright (C) 2011-2012 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 -- Based on MAM ProtoXEP Version 0.1 (2010-07-01)
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7
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8 local xmlns_mam = "urn:xmpp:mam:tmp";
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9 local xmlns_delay = "urn:xmpp:delay";
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10 local xmlns_forward = "urn:xmpp:forward:0";
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11
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12 local st = require "util.stanza";
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13 local jid_bare = require "util.jid".bare;
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14 local jid_split = require "util.jid".split;
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15 local host = module.host;
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16 local host_sessions = hosts[host].sessions;
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17
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18 local dm_load = require "util.datamanager".load;
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19 local dm_store = require "util.datamanager".store;
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20 local dm_list_load = require "util.datamanager".list_load;
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21 local dm_list_append = require "util.datamanager".list_append;
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22 local rm_load_roster = require "core.rostermanager".load_roster;
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23
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24 local time_now = os.time;
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25 local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse;
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26 local uuid = require "util.uuid".generate;
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27 local global_default_policy = module:get_option("default_archive_policy", false);
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28 -- TODO Should be possible to enforce it too
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29
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30 local default_attrs = {
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31 always = true, [true] = "always",
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32 never = false, [false] = "never",
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33 roster = "roster",
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34 }
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35
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36 do
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37 local prefs_format = {
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38 [false] = "roster",
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39 -- default ::= true | false | "roster"
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40 -- true = always, false = never, nil = global default
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41 ["romeo@montague.net"] = true, -- always
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42 ["montague@montague.net"] = false, -- newer
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43 };
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44 end
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45
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46 local prefs_store = "archive2_prefs";
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47 local function get_prefs(user)
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48 return dm_load(user, host, prefs_store) or
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49 { [false] = global_default_policy };
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50 end
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51 local function set_prefs(user, prefs)
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52 return dm_store(user, host, prefs_store, prefs);
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53 end
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54
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55
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56 -- Handle prefs.
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57 module:hook("iq/self/"..xmlns_mam..":prefs", function(event)
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58 local origin, stanza = event.origin, event.stanza;
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59 local user = origin.username;
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60 if stanza.attr.type == "get" then
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61 local prefs = get_prefs(user);
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62 local default = prefs[false];
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63 default = default ~= nil and default_attrs[default] or global_default_policy;
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64 local reply = st.reply(stanza):tag("prefs", { xmlns = xmlns_mam, default = default })
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65 --module:log("debug", "get_prefs(%q) => %s", user, require"util.serialization".serialize(prefs));
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66 local always = st.stanza("always");
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67 local never = st.stanza("never");
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68 for k,v in pairs(prefs) do
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69 if k then
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70 (v and always or never):tag("jid"):text(k):up();
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71 end
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72 end
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73 reply:add_child(always):add_child(never);
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74 origin.send(reply);
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75 return true
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76 else -- type == "set"
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77 local prefs = {};
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78 local new_prefs = stanza:get_child("prefs", xmlns_mam);
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79 local new_default = new_prefs.attr.default;
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80 if new_default then
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81 prefs[false] = default_attrs[new_default];
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82 end
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83
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84 local always = new_prefs:get_child("always");
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85 if always then
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86 for rule in always:childtags("jid") do
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87 local jid = rule:get_text();
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88 prefs[jid] = true;
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89 end
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90 end
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91
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92 local never = new_prefs:get_child("never");
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93 if never then
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94 for rule in never:childtags("jid") do
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95 local jid = rule:get_text();
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96 prefs[jid] = false;
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97 end
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98 end
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99
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100 --module:log("debug", "set_prefs(%q, %s)", user, require"util.serialization".serialize(prefs));
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101 local ok, err = set_prefs(user, prefs);
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102 if not ok then
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103 origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error storing preferences: "..tostring(err)));
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104 else
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105 origin.send(st.reply(stanza));
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106 end
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107 return true
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108 end
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109 end);
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110
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111 -- Handle archive queries
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112 module:hook("iq/self/"..xmlns_mam..":query", function(event)
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113 local origin, stanza = event.origin, event.stanza;
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114 local query = stanza.tags[1];
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115 if stanza.attr.type == "get" then
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116 local qid = query.attr.queryid;
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117
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118 -- Search query parameters
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119 local qwith = query:get_child_text("with");
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120 local qstart = query:get_child_text("start");
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121 local qend = query:get_child_text("end");
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122 module:log("debug", "Archive query, id %s with %s from %s until %s)",
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123 tostring(qid), qwith or "anyone", qstart or "the dawn of time", qend or "now");
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124
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125 qstart, qend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend))
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126
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127 -- Load all the data!
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128 local data, err = dm_list_load(origin.username, origin.host, "archive2");
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129 if not data then
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130 if (not err) then
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131 module:log("debug", "The archive was empty.");
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132 origin.send(st.reply(stanza));
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133 else
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134 origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error loading archive: "..tostring(err)));
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135 end
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136 return true
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137 end
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138
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139 module:log("debug", "Loaded %d items, about to filter", #data);
523
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140 for i=1,#data do
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141 local item = data[i];
558
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142 local when, with, with_bare = item.when, item.with, item.with_bare;
523
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143 local ts = item.timestamp;
558
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144 --module:log("debug", "message with %s at %s", with, when or "???");
523
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145 -- Apply query filter
558
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146 if (not qwith or ((qwith == with) or (qwith == with_bare)))
523
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147 and (not qstart or when >= qstart)
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148 and (not qend or when <= qend) then
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149 -- Optimizable? Do this when archiving?
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150 --module:log("debug", "sending");
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151 local fwd_st = st.message{ to = origin.full_jid }
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152 :tag("result", { xmlns = xmlns_mam, queryid = qid }):up()
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153 :tag("forwarded", { xmlns = xmlns_forward })
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154 :tag("delay", { xmlns = xmlns_delay, stamp = ts or timestamp(when) }):up();
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155 local orig_stanza = st.deserialize(item.stanza);
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156 orig_stanza.attr.xmlns = "jabber:client";
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157 fwd_st:add_child(orig_stanza);
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158 origin.send(fwd_st);
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159 end
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Kim Alvefur <zash@zash.se>
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160 end
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Kim Alvefur <zash@zash.se>
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161 -- That's all folks!
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162 module:log("debug", "Archive query %s completed", tostring(qid));
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163 origin.send(st.reply(stanza));
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164 return true
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165 end
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166 end);
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167
558
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168 local function has_in_roster(user, who)
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169 local roster = rm_load_roster(user, host);
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170 module:log("debug", "%s has %s in roster? %s", user, who, roster[who] and "yes" or "no");
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171 return roster and roster[who];
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172 end
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173
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174 local function shall_store(user, who)
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175 -- TODO Cache this?
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176 local prefs = get_prefs(user);
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177 local rule = prefs[who];
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178 module:log("debug", "%s's rule for %s is %s", user, who, tostring(rule))
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179 if rule ~= nil then
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180 return rule;
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181 else -- Below could be done by a metatable
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182 local default = prefs[false];
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183 module:log("debug", "%s's default rule is %s", user, tostring(default))
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184 if default == nil then
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185 default = global_default_policy;
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186 module:log("debug", "Using global default rule, %s", tostring(default))
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187 end
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188 if default == "roster" then
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189 return has_in_roster(user, who);
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190 end
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191 return default;
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192 end
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193 end
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194
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195 -- Handle messages
523
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196 local function message_handler(event, c2s)
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197 local origin, stanza = event.origin, event.stanza;
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198 local orig_type = stanza.attr.type or "normal";
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199 local orig_to = stanza.attr.to;
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200 local orig_from = stanza.attr.from;
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201
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202 if not orig_from and c2s then
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203 orig_from = origin.full_jid;
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204 end
619
cade7dac6159 mod_mam: Try to not bork when sending a message to your bare jid
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diff changeset
205 orig_to = orig_to or orig_from; -- Weird corner cases
523
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206
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207 -- Don't store messages of these types
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Kim Alvefur <zash@zash.se>
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208 if orig_type == "error"
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Kim Alvefur <zash@zash.se>
parents:
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209 or orig_type == "headline"
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Kim Alvefur <zash@zash.se>
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210 or orig_type == "groupchat" then
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211 return;
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212 -- TODO Maybe headlines should be configurable?
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213 -- TODO Write a mod_mam_muc for groupchat messages.
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214 end
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parents:
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215
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216 local store_user, store_host = jid_split(c2s and orig_from or orig_to);
558
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217 local target_jid = c2s and orig_to or orig_from;
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218 local target_bare = jid_bare(target_jid);
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diff changeset
219
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diff changeset
220 assert(store_host == host, "This should not happen.");
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diff changeset
221
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diff changeset
222 if shall_store(store_user, target_bare) then
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diff changeset
223 module:log("debug", "Archiving stanza: %s", stanza:top_tag());
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224
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225 -- Stamp "We archived this" on the message
559
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Kim Alvefur <zash@zash.se>
parents: 558
diff changeset
226 local id = uuid();
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Kim Alvefur <zash@zash.se>
parents: 558
diff changeset
227 stanza:tag("archived", { xmlns = xmlns_mam, by = host, id = id });
523
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parents:
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228
558
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229 local when = time_now();
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230 -- And stash it
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diff changeset
231 dm_list_append(store_user, store_host, "archive2", {
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parents: 523
diff changeset
232 -- WARNING This format may change.
559
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Kim Alvefur <zash@zash.se>
parents: 558
diff changeset
233 id = id,
558
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
234 when = when, -- This might be an UNIX timestamp. Probably.
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parents: 523
diff changeset
235 timestamp = timestamp(when), -- Textual timestamp. But I'll assume that comparing numbers is faster and less annoying in case of timezones.
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parents: 523
diff changeset
236 with = target_jid,
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diff changeset
237 with_bare = target_bare, -- Optimization, to avoid loads of jid_bare() calls when filtering.
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parents: 523
diff changeset
238 stanza = st.preserialize(stanza)
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
239 });
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parents: 523
diff changeset
240 else
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parents: 523
diff changeset
241 module:log("debug", "Not archiving stanza: %s", stanza:top_tag());
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parents: 523
diff changeset
242 end
523
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
243 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
244
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
245 local function c2s_message_handler(event)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
246 return message_handler(event, true);
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
247 end
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
248
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
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249 -- Stanzas sent by local clients
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
250 module:hook("pre-message/bare", c2s_message_handler, 1);
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
251 module:hook("pre-message/full", c2s_message_handler, 1);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
252 -- Stanszas to local clients
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
253 module:hook("message/bare", message_handler, 1);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
254 module:hook("message/full", message_handler, 1);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
255
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
256 module:add_feature(xmlns_mam);
558
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
257