Mercurial > prosody-modules
annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 3434:a6722a35f35e
mod_storage_xmlarchive: Expand description in README
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 06 Jan 2019 10:27:16 +0100 |
parents | 75930e4c2478 |
children | 1c8612d8db55 |
rev | line source |
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mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
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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 |
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7 module:depends"csi" |
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8 if filter_muc then module:depends"track_muc_joins"; end -- only depend on this module if we actually use it |
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9 local s_match = string.match; |
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10 local s_sub = string.sub; |
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11 local jid = require "util.jid"; |
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12 local new_queue = require "util.queue".new; |
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13 local datetime = require "util.datetime"; |
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14 local st = require "util.stanza"; |
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15 |
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16 local xmlns_delay = "urn:xmpp:delay"; |
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17 |
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18 -- a log id for this module instance |
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19 local id = s_sub(require "util.hashes".sha256(datetime.datetime(), true), 1, 4); |
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20 |
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21 |
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22 -- Patched version of util.stanza:find() that supports giving stanza names |
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23 -- without their namespace, allowing for every namespace. |
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24 local function find(self, path) |
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25 local pos = 1; |
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26 local len = #path + 1; |
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27 |
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28 repeat |
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29 local xmlns, name, text; |
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30 local char = s_sub(path, pos, pos); |
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31 if char == "@" then |
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32 return self.attr[s_sub(path, pos + 1)]; |
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33 elseif char == "{" then |
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34 xmlns, pos = s_match(path, "^([^}]+)}()", pos + 1); |
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35 end |
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36 name, text, pos = s_match(path, "^([^@/#]*)([/#]?)()", pos); |
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37 name = name ~= "" and name or nil; |
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38 if pos == len then |
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39 if text == "#" then |
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40 local child = xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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41 return child and child:get_text() or nil; |
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42 end |
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43 return xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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44 end |
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45 self = xmlns ~= nil and self:get_child(name, xmlns) or self:child_with_name(name); |
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46 until not self |
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47 return nil; |
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48 end |
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49 |
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50 local function new_pump(output, ...) |
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51 -- luacheck: ignore 212/self |
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52 local q = new_queue(...); |
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53 local flush = true; |
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54 function q:pause() |
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55 flush = false; |
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56 end |
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57 function q:resume() |
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58 flush = true; |
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59 return q:flush(); |
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60 end |
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61 local push = q.push; |
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62 function q:push(item) |
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63 local ok = push(self, item); |
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64 if not ok then |
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65 q:flush(); |
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66 output(item, self); |
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67 elseif flush then |
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68 return q:flush(); |
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69 end |
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70 return true; |
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71 end |
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72 function q:flush(alternative_output) |
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73 local out = alternative_output or output; |
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74 local item = self:pop(); |
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75 while item do |
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76 out(item, self); |
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77 item = self:pop(); |
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78 end |
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79 return true; |
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80 end |
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81 return q; |
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82 end |
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83 |
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84 local function is_stamp_needed(stanza, session) |
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85 local st_name = stanza and stanza.name or nil; |
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86 if st_name == "presence" then |
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87 return true; |
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88 elseif st_name == "message" then |
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89 if stanza:get_child("delay", xmlns_delay) then return false; end |
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90 if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then return true; end |
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91 end |
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92 return false; |
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93 end |
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94 |
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95 local function add_stamp(stanza, session) |
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96 local bare_jid = jid.bare(session.full_jid or session.host); |
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97 stanza = stanza:tag("delay", { xmlns = xmlns_delay, from = bare_jid, stamp = datetime.datetime()}); |
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98 return stanza; |
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99 end |
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100 |
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101 local function is_important(stanza, session) |
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102 local st_name = stanza and stanza.name or nil; |
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103 if not st_name then return true; end -- nonzas are always important |
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104 if st_name == "presence" then |
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105 -- TODO check for MUC status codes? |
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106 return false; |
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107 elseif st_name == "message" then |
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108 -- unpack carbon copies |
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109 local stanza_direction = "in"; |
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110 local carbon; |
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111 local st_type; |
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112 -- support carbon copied message stanzas having an arbitrary message-namespace or no message-namespace at all |
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113 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:2}/forwarded/message"); end |
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114 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:1}/forwarded/message"); end |
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115 stanza_direction = carbon and stanza:child_with_name("sent") and "out" or "in"; |
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116 --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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117 if carbon then stanza = carbon; end |
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118 st_type = stanza.attr.type; |
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119 |
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120 -- headline message are always not important |
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121 if st_type == "headline" then return false; end |
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122 |
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123 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications |
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124 if find(stanza, "{urn:xmpp:chat-markers:0}") then return true; end; |
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125 |
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126 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here |
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127 --if carbon and stanza_direction == "out" then return false; end |
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128 |
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129 -- We can't check for body contents in encrypted messages, so let's treat them as important |
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130 -- Some clients don't even set a body or an empty body for encrypted messages |
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131 |
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132 -- check omemo https://xmpp.org/extensions/inbox/omemo.html |
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133 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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134 |
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135 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html |
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136 if stanza:get_child("x", "jabber:x:encrypted") then return true; end |
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137 |
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138 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html |
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139 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end |
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140 |
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141 local body = stanza:get_child_text("body"); |
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142 if st_type == "groupchat" then |
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143 if stanza:get_child_text("subject") then return true; end |
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144 if body == nil or body == "" then return false; end |
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145 -- body contains text, let's see if we want to process it further |
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146 if filter_muc then |
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147 if body:find(session.username, 1, true) then return true; end |
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148 local rooms = session.rooms_joined; |
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149 if not rooms then return false; end |
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150 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)]; |
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151 if room_nick and body:find(room_nick, 1, true) then return true; end |
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152 return false; |
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153 else |
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154 return true; |
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155 end |
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156 end |
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157 return body ~= nil and body ~= ""; |
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158 end |
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159 return true; |
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160 end |
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161 |
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162 module:hook("csi-client-inactive", function (event) |
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163 local session = event.origin; |
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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.send, 100); |
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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 session.pump then |
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194 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id); |
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195 session.pump:resume(); |
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196 end |
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197 end); |
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198 |
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199 -- clean up this session on hibernation end |
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200 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module |
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201 module:hook("smacks-hibernation-end", function (event) |
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202 local session = event.resumed; |
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203 if session.pump then |
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204 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id); |
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205 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume |
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206 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one |
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207 -- session.send = session._pump_orig_send; |
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208 session.pump = nil; |
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209 session._pump_orig_send = nil; |
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210 end |
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211 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*) |
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212 |
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213 function module.unload() |
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214 module:log("info", "%s: Unloading module, flushing all buffers", id); |
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215 local host_sessions = prosody.hosts[module.host].sessions; |
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216 for _, user in pairs(host_sessions) do |
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217 for _, session in pairs(user.sessions) do |
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218 if session.pump then |
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219 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id); |
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220 session.pump:flush(); |
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221 session.send = session._pump_orig_send; |
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222 session.pump = nil; |
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223 session._pump_orig_send = nil; |
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224 end |
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225 end |
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226 end |
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227 end |
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228 |
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229 module:log("info", "%s: Successfully loaded module", id); |