author | Kim Alvefur <zash@zash.se> |
Tue, 28 Feb 2012 14:36:41 +0100 | |
changeset 620 | 648e75c9d3e7 |
parent 619 | cade7dac6159 |
child 621 | 7bdd02056e2b |
permissions | -rw-r--r-- |
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-- XEP-xxxx: Message Archive Management for Prosody |
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-- Copyright (C) 2011-2012 Kim Alvefur |
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-- |
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-- This file is MIT/X11 licensed. |
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-- |
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-- Based on MAM ProtoXEP Version 0.1 (2010-07-01) |
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local xmlns_mam = "urn:xmpp:mam:tmp"; |
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local xmlns_delay = "urn:xmpp:delay"; |
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local xmlns_forward = "urn:xmpp:forward:0"; |
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local st = require "util.stanza"; |
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local jid_bare = require "util.jid".bare; |
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local jid_split = require "util.jid".split; |
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local host = module.host; |
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local host_sessions = hosts[host].sessions; |
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local dm_load = require "util.datamanager".load; |
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local dm_store = require "util.datamanager".store; |
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local dm_list_load = require "util.datamanager".list_load; |
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local dm_list_append = require "util.datamanager".list_append; |
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local rm_load_roster = require "core.rostermanager".load_roster; |
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local time_now = os.time; |
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local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse; |
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local uuid = require "util.uuid".generate; |
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local global_default_policy = module:get_option("default_archive_policy", false); |
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-- TODO Should be possible to enforce it too |
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local default_attrs = { |
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always = true, [true] = "always", |
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never = false, [false] = "never", |
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roster = "roster", |
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} |
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|
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do |
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local prefs_format = { |
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[false] = "roster", |
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-- default ::= true | false | "roster" |
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-- true = always, false = never, nil = global default |
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["romeo@montague.net"] = true, -- always |
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["montague@montague.net"] = false, -- newer |
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}; |
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end |
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local prefs_store = "archive2_prefs"; |
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local function get_prefs(user) |
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return dm_load(user, host, prefs_store) or |
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{ [false] = global_default_policy }; |
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end |
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local function set_prefs(user, prefs) |
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return dm_store(user, host, prefs_store, prefs); |
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end |
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-- Handle prefs. |
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module:hook("iq/self/"..xmlns_mam..":prefs", function(event) |
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local origin, stanza = event.origin, event.stanza; |
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local user = origin.username; |
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if stanza.attr.type == "get" then |
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local prefs = get_prefs(user); |
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local default = prefs[false]; |
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default = default ~= nil and default_attrs[default] or global_default_policy; |
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local reply = st.reply(stanza):tag("prefs", { xmlns = xmlns_mam, default = default }) |
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--module:log("debug", "get_prefs(%q) => %s", user, require"util.serialization".serialize(prefs)); |
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local always = st.stanza("always"); |
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local never = st.stanza("never"); |
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for k,v in pairs(prefs) do |
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if k then |
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(v and always or never):tag("jid"):text(k):up(); |
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end |
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end |
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reply:add_child(always):add_child(never); |
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origin.send(reply); |
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return true |
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else -- type == "set" |
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local prefs = {}; |
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local new_prefs = stanza:get_child("prefs", xmlns_mam); |
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local new_default = new_prefs.attr.default; |
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if new_default then |
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prefs[false] = default_attrs[new_default]; |
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end |
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local always = new_prefs:get_child("always"); |
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if always then |
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for rule in always:childtags("jid") do |
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local jid = rule:get_text(); |
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prefs[jid] = true; |
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end |
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end |
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local never = new_prefs:get_child("never"); |
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if never then |
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for rule in never:childtags("jid") do |
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local jid = rule:get_text(); |
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prefs[jid] = false; |
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end |
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end |
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--module:log("debug", "set_prefs(%q, %s)", user, require"util.serialization".serialize(prefs)); |
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local ok, err = set_prefs(user, prefs); |
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if not ok then |
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origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error storing preferences: "..tostring(err))); |
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else |
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origin.send(st.reply(stanza)); |
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end |
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return true |
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end |
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end); |
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|
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-- Handle archive queries |
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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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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); |
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140 |
for i=1,#data do |
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141 |
local item = data[i]; |
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142 |
local when, with, with_bare = item.when, item.with, item.with_bare; |
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143 |
local ts = item.timestamp; |
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144 |
--module:log("debug", "message with %s at %s", with, when or "???"); |
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145 |
-- Apply query filter |
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146 |
if (not qwith or ((qwith == with) or (qwith == with_bare))) |
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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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160 |
end |
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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 |
|
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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 |
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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 |
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205 |
orig_to = orig_to or orig_from; -- Weird corner cases |
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206 |
|
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207 |
-- Don't store messages of these types |
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208 |
if orig_type == "error" |
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209 |
or orig_type == "headline" |
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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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215 |
|
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216 |
local store_user, store_host = jid_split(c2s and orig_from or orig_to); |
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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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219 |
|
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220 |
assert(store_host == host, "This should not happen."); |
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221 |
|
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222 |
if shall_store(store_user, target_bare) then |
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223 |
module:log("debug", "Archiving stanza: %s", stanza:top_tag()); |
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|
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-- Stamp "We archived this" on the message |
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local id = uuid(); |
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stanza:tag("archived", { xmlns = xmlns_mam, by = host, id = id }):up(); |
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|
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local when = time_now(); |
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-- And stash it |
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dm_list_append(store_user, store_host, "archive2", { |
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-- WARNING This format may change. |
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id = id, |
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when = when, -- This might be an UNIX timestamp. Probably. |
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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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with = target_jid, |
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with_bare = target_bare, -- Optimization, to avoid loads of jid_bare() calls when filtering. |
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stanza = st.preserialize(stanza) |
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}); |
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else |
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module:log("debug", "Not archiving stanza: %s", stanza:top_tag()); |
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end |
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end |
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|
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local function c2s_message_handler(event) |
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return message_handler(event, true); |
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end |
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-- Stanzas sent by local clients |
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module:hook("pre-message/bare", c2s_message_handler, 1); |
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module:hook("pre-message/full", c2s_message_handler, 1); |
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-- Stanszas to local clients |
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module:hook("message/bare", message_handler, 1); |
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module:hook("message/full", message_handler, 1); |
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|
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module:add_feature(xmlns_mam); |
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