prosody-modules
66f96b98d219
mod_csi_battery_saver/mod_csi_battery_saver.lua

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mod_csi_battery_saver/mod_csi_battery_saver.lua @ 3852:66f96b98d219

mod_rest: Allow returning an array of JID strings as disco#items
author Kim Alvefur <zash@zash.se>
date Sat, 25 Jan 2020 00:30:14 +0100
parent 3633:6b0db0f2d57a
child 3980:19c5bfc3a241
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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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17 local xmlns_delay = "urn:xmpp:delay";
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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 -- TODO check for MUC status codes?
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92 return false;
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93 elseif st_name == "message" then
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94 -- unpack carbon copies
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95 local carbon, stanza_direction = extract_carbon(stanza);
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96 --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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97 if carbon then stanza = carbon; end
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98
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99 local st_type = stanza.attr.type;
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100 -- headline message are always not important
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101 if st_type == "headline" then return false; end
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102
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103 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications
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104 if stanza:child_with_ns("urn:xmpp:chat-markers:0") then return true; end;
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105
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106 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here
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107 --if carbon and stanza_direction == "out" then return false; end
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108
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diff changeset
109 -- We can't check for body contents in encrypted messages, so let's treat them as important
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110 -- Some clients don't even set a body or an empty body for encrypted messages
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diff changeset
111
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112 -- check omemo https://xmpp.org/extensions/inbox/omemo.html
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diff changeset
113 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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114
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115 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html
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116 if stanza:get_child("x", "jabber:x:encrypted") then return true; end
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117
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118 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html
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119 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end
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120
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121 -- check eme
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122 if stanza:get_child("encryption", "urn:xmpp:eme:0") then return true; end
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123
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124 local body = stanza:get_child_text("body");
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125 if st_type == "groupchat" then
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126 if stanza:get_child_text("subject") then return true; end
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127 if body == nil or body == "" then return false; end
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128 -- body contains text, let's see if we want to process it further
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129 if not filter_muc then -- default case
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130 local stanza_important = module:fire_event("csi-is-stanza-important", { stanza = stanza, session = session });
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131 if stanza_important ~= nil then return stanza_important; end
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132 return true; -- deemed unknown/high priority by mod_csi_muc_priorities or some other module
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diff changeset
133 else
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134 if body:find(session.username, 1, true) then return true; end
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135 local rooms = session.rooms_joined;
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136 if not rooms then return false; end
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diff changeset
137 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)];
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diff changeset
138 if room_nick and body:find(room_nick, 1, true) then return true; end
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diff changeset
139 return false;
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diff changeset
140 end
2606
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141 end
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142 return body ~= nil and body ~= "";
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143 end
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144 return true;
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145 end
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parents:
diff changeset
146
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diff changeset
147 module:hook("csi-client-inactive", function (event)
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148 local session = event.origin;
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149 if session.pump then
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150 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id);
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parents:
diff changeset
151 session.pump:pause();
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152 else
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diff changeset
153 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id);
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diff changeset
154 local pump = new_pump(session, session.send, queue_size);
2606
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parents:
diff changeset
155 pump:pause();
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parents:
diff changeset
156 session.pump = pump;
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diff changeset
157 session._pump_orig_send = session.send;
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diff changeset
158 function session.send(stanza)
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159 session.log("debug", "mod_csi_battery_saver(%s): Got outgoing stanza: <%s>", id, tostring(stanza.name or stanza));
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parents:
diff changeset
160 local important = is_important(stanza, session);
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diff changeset
161 -- clone stanzas before adding delay stamp and putting them into the queue
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diff changeset
162 if st.is_stanza(stanza) then stanza = st.clone(stanza); end
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diff changeset
163 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped
2606
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parents:
diff changeset
164 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end
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parents: 2741
diff changeset
165 -- add stanza to outgoing queue and flush the buffer if needed
2606
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parents:
diff changeset
166 pump:push(stanza);
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parents:
diff changeset
167 if important then
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diff changeset
168 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name or stanza));
2606
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parents:
diff changeset
169 pump:flush();
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parents:
diff changeset
170 end
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parents:
diff changeset
171 return true;
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diff changeset
172 end
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diff changeset
173 end
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diff changeset
174 end);
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parents:
diff changeset
175
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diff changeset
176 module:hook("csi-client-active", function (event)
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diff changeset
177 local session = event.origin;
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diff changeset
178 if session.pump then
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diff changeset
179 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id);
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diff changeset
180 session.pump:resume();
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181 end
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diff changeset
182 end);
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diff changeset
183
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diff changeset
184 -- clean up this session on hibernation end
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185 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module
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diff changeset
186 module:hook("smacks-hibernation-end", function (event)
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diff changeset
187 local session = event.resumed;
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diff changeset
188 if session.pump then
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189 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id);
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diff changeset
190 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume
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diff changeset
191 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one
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192 -- session.send = session._pump_orig_send;
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diff changeset
193 session.pump = nil;
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194 session._pump_orig_send = nil;
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195 end
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diff changeset
196 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*)
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197
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diff changeset
198 function module.unload()
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diff changeset
199 module:log("info", "%s: Unloading module, flushing all buffers", id);
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200 local host_sessions = prosody.hosts[module.host].sessions;
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parents:
diff changeset
201 for _, user in pairs(host_sessions) do
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parents:
diff changeset
202 for _, session in pairs(user.sessions) do
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203 if session.pump then
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diff changeset
204 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id);
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diff changeset
205 session.pump:flush();
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diff changeset
206 session.send = session._pump_orig_send;
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diff changeset
207 session.pump = nil;
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diff changeset
208 session._pump_orig_send = nil;
b62cec32680e mod_csi_battery_saver: Fix bug when smacks is resumed before hibernating
tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
209 end
2606
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
tmolitor <thilo@eightysoft.de>
parents:
diff changeset
210 end
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
tmolitor <thilo@eightysoft.de>
parents:
diff changeset
211 end
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
tmolitor <thilo@eightysoft.de>
parents:
diff changeset
212 end
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
tmolitor <thilo@eightysoft.de>
parents:
diff changeset
213
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
tmolitor <thilo@eightysoft.de>
parents:
diff changeset
214 module:log("info", "%s: Successfully loaded module", id);