Mercurial > prosody-modules
annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 5853:97c9b76867ca
mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Otherwise the global event handlers accumulate, one added each time
logging is reoladed, and each invocation of the signal or event triggers
one dump of each created ringbuffer.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 03 Mar 2024 11:23:40 +0100 |
parents | f6a2602129c8 |
children | 433a4dd1dc2a |
rev | line source |
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1 -- Copyright (C) 2016 Kim Alvefur |
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2 -- Copyright (C) 2017 Thilo Molitor |
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3 -- |
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4 |
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5 local filter_muc = module:get_option_boolean("csi_battery_saver_filter_muc", false); |
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6 local queue_size = module:get_option_number("csi_battery_saver_queue_size", 256); |
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7 |
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8 module:depends"csi" |
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9 if filter_muc then module:depends"track_muc_joins"; end -- only depend on this module if we actually use it |
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10 local s_match = string.match; |
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11 local s_sub = string.sub; |
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12 local jid = require "util.jid"; |
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13 local new_queue = require "util.queue".new; |
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14 local datetime = require "util.datetime"; |
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15 local st = require "util.stanza"; |
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16 |
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17 local xmlns_delay = "urn:xmpp:delay"; |
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18 |
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19 -- a log id for this module instance |
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20 local id = s_sub(require "util.hashes".sha256(datetime.datetime(), true), 1, 4); |
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21 |
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22 |
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23 -- Returns a forwarded message, and either "in" or "out" depending on the direction |
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24 -- Returns nil if the message is not a carbon |
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25 local function extract_carbon(stanza) |
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26 local carbon = stanza:child_with_ns("urn:xmpp:carbons:2") or stanza:child_with_ns("urn:xmpp:carbons:1"); |
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27 if not carbon then return; end |
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28 local direction = carbon.name == "sent" and "out" or "in"; |
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29 local forward = carbon:get_child("forwarded", "urn:xmpp:forward:0"); |
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30 local message = forward and forward:child_with_name("message") or nil; |
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31 if not message then return; end |
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32 return message, direction; |
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33 end |
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34 |
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35 local function new_pump(session, output, ...) |
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36 -- luacheck: ignore 212/self |
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37 local q = new_queue(...); |
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38 local flush = true; |
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39 function q:pause() |
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40 flush = false; |
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41 end |
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42 function q:resume() |
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43 flush = true; |
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44 return q:flush(); |
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45 end |
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46 local push = q.push; |
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47 function q:push(item) |
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48 local ok = push(self, item); |
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49 if not ok then |
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50 session.log("debug", "mod_csi_battery_saver(%s): Queue full (%d items), forcing flush...", id, q:count()); |
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51 q:flush(); |
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52 output(item, self); |
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53 elseif flush then |
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54 return q:flush(); |
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55 end |
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56 return true; |
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57 end |
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58 function q:flush(alternative_output) |
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59 local out = alternative_output or output; |
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60 local item = self:pop(); |
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61 while item do |
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62 out(item, self); |
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63 item = self:pop(); |
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64 end |
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65 return true; |
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66 end |
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67 return q; |
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68 end |
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69 |
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70 local function is_stamp_needed(stanza, session) |
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71 local st_name = stanza and stanza.name or nil; |
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72 if st_name == "presence" then |
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73 return true; |
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74 elseif st_name == "message" then |
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75 if stanza:get_child("delay", xmlns_delay) then return false; end |
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76 if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then return true; end |
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77 end |
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78 return false; |
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79 end |
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80 |
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81 local function add_stamp(stanza, session) |
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82 local bare_jid = jid.bare(session.full_jid or session.host); |
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83 stanza = stanza:tag("delay", { xmlns = xmlns_delay, from = bare_jid, stamp = datetime.datetime()}); |
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84 return stanza; |
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85 end |
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86 |
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87 local function is_important(stanza, session) |
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88 local st_name = stanza and stanza.name or nil; |
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89 if not st_name then return true; end -- nonzas are always important |
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90 if st_name == "presence" then |
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91 local st_type = stanza.attr.type; |
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92 -- subscription requests are important |
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93 if st_type == "subscribe" then return true; end |
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94 -- muc status codes are important, too |
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95 local muc_x = stanza:get_child("x", "http://jabber.org/protocol/muc#user") |
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96 local muc_status = muc_x and muc_x:get_child("status") or nil |
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97 if muc_status and muc_status.attr.code then return true; end |
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98 return false; |
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99 elseif st_name == "message" then |
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100 -- unpack carbon copies |
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101 local carbon, stanza_direction = extract_carbon(stanza); |
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102 --session.log("debug", "mod_csi_battery_saver(%s): stanza_direction = %s, carbon = %s, stanza = %s", id, stanza_direction, carbon and "true" or "false", tostring(stanza)); |
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103 if carbon then stanza = carbon; end |
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104 |
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105 local st_type = stanza.attr.type; |
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106 |
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107 -- headline message are always not important |
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108 if st_type == "headline" then return false; end |
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109 |
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110 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications |
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111 if stanza:child_with_ns("urn:xmpp:chat-markers:0") then return true; end; |
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112 |
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113 -- XEP-0353: Jingle Message Initiation incoming call messages |
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114 if stanza:child_with_ns("urn:xmpp:jingle-message:0") then return true; end |
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115 if stanza:child_with_ns("urn:xmpp:jingle-message:1") then return true; end |
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116 |
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117 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here |
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118 --if carbon and stanza_direction == "out" then return false; end |
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119 |
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120 -- We can't check for body contents in encrypted messages, so let's treat them as important |
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121 -- Some clients don't even set a body or an empty body for encrypted messages |
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122 |
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123 -- check omemo https://xmpp.org/extensions/inbox/omemo.html |
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124 if stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return true; end |
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125 |
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126 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html |
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127 if stanza:get_child("x", "jabber:x:encrypted") then return true; end |
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128 |
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129 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html |
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130 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end |
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131 |
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132 -- check eme |
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133 if stanza:get_child("encryption", "urn:xmpp:eme:0") then return true; end |
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134 |
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135 local body = stanza:get_child_text("body"); |
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136 if st_type == "groupchat" then |
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137 if stanza:get_child_text("subject") then return true; end |
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138 if body == nil or body == "" then return false; end |
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139 -- body contains text, let's see if we want to process it further |
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140 if not filter_muc then -- default case |
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141 local stanza_important = module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session }); |
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142 if stanza_important ~= nil then return stanza_important; end |
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143 return true; -- deemed unknown/high priority by mod_csi_muc_priorities or some other module |
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144 else |
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145 if body:find(session.username, 1, true) then return true; end |
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146 local rooms = session.rooms_joined; |
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147 if not rooms then return false; end |
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148 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)]; |
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149 if room_nick and body:find(room_nick, 1, true) then return true; end |
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150 return false; |
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151 end |
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152 end |
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153 return body ~= nil and body ~= ""; |
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154 end |
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155 return true; |
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156 end |
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157 |
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158 module:hook("csi-client-inactive", function (event) |
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159 local session = event.origin; |
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160 if not session.resource then |
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161 session.log("warn", "Ignoring csi if no resource is bound!"); |
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162 return; |
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163 end |
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164 if session.pump then |
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165 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id); |
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166 session.pump:pause(); |
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167 else |
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168 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id); |
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169 local pump = new_pump(session, session.send, queue_size); |
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170 pump:pause(); |
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171 session.pump = pump; |
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172 session._pump_orig_send = session.send; |
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173 function session.send(stanza) |
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174 session.log("debug", "mod_csi_battery_saver(%s): Got outgoing stanza: <%s>", id, tostring(stanza.name or stanza)); |
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175 local important = is_important(stanza, session); |
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176 -- clone stanzas before adding delay stamp and putting them into the queue |
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177 if st.is_stanza(stanza) then stanza = st.clone(stanza); end |
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178 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped |
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179 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end |
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180 -- add stanza to outgoing queue and flush the buffer if needed |
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181 pump:push(stanza); |
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182 if important then |
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183 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name or stanza)); |
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184 pump:flush(); |
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185 end |
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186 return true; |
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187 end |
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188 end |
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189 end); |
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190 |
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191 module:hook("csi-client-active", function (event) |
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192 local session = event.origin; |
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193 if not session.resource then |
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194 session.log("warn", "Ignoring csi if no resource is bound!"); |
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195 return; |
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196 end |
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197 if session.pump then |
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198 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id); |
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199 session.pump:resume(); |
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200 end |
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201 end); |
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202 |
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203 -- clean up this session on hibernation end |
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204 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module |
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205 module:hook("smacks-hibernation-end", function (event) |
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206 local session = event.resumed; |
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207 if session.pump then |
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208 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id); |
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209 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume |
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210 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one |
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211 -- session.send = session._pump_orig_send; |
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212 session.pump = nil; |
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213 session._pump_orig_send = nil; |
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214 end |
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215 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*) |
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216 |
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217 function module.unload() |
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218 module:log("info", "%s: Unloading module, flushing all buffers", id); |
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219 local host_sessions = prosody.hosts[module.host].sessions; |
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220 for _, user in pairs(host_sessions) do |
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221 for _, session in pairs(user.sessions) do |
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222 if session.pump then |
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223 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id); |
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224 session.pump:flush(); |
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225 session.send = session._pump_orig_send; |
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226 session.pump = nil; |
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227 session._pump_orig_send = nil; |
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228 end |
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229 end |
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230 end |
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231 end |
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232 |
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233 module:log("info", "%s: Successfully loaded module", id); |