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annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 3481:1c8612d8db55

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mod_csi_battery_saver: Remove patched stanza:find() method and reduce Carbons-related code
author Matthew Wild <mwild1@gmail.com>
date Fri, 08 Mar 2019 11:44:20 +0000
parents 75930e4c2478
children 972b21d34306
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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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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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22 -- Returns a forwarded message, and either "in" or "out" depending on the direction
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23 -- Returns nil if the message is not a carbon
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24 local function extract_carbon(stanza)
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25 local carbon = stanza:child_with_ns("urn:xmpp:carbons:2") or stanza:child_with_ns("urn:xmpp:carbons:1");
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26 if not carbon then return; end
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27 local direction = carbon.name == "sent" and "out" or "in";
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28 local forward = carbon:get_child("urn:xmpp:forward:0", "forwarded");
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29 local message = forward and forward:child_with_name("message") or nil;
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30 if not message then return; end
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31 return message, direction;
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32 end
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33
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34 local function new_pump(output, ...)
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35 -- luacheck: ignore 212/self
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36 local q = new_queue(...);
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37 local flush = true;
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38 function q:pause()
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39 flush = false;
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40 end
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41 function q:resume()
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42 flush = true;
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43 return q:flush();
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44 end
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45 local push = q.push;
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46 function q:push(item)
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47 local ok = push(self, item);
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48 if not ok then
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49 q:flush();
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50 output(item, self);
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51 elseif flush then
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52 return q:flush();
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53 end
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54 return true;
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55 end
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56 function q:flush(alternative_output)
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57 local out = alternative_output or output;
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58 local item = self:pop();
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59 while item do
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60 out(item, self);
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61 item = self:pop();
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62 end
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63 return true;
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64 end
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65 return q;
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66 end
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67
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68 local function is_stamp_needed(stanza, session)
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69 local st_name = stanza and stanza.name or nil;
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70 if st_name == "presence" then
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71 return true;
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72 elseif st_name == "message" then
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73 if stanza:get_child("delay", xmlns_delay) then return false; end
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74 if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then return true; end
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75 end
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76 return false;
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77 end
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78
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79 local function add_stamp(stanza, session)
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80 local bare_jid = jid.bare(session.full_jid or session.host);
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81 stanza = stanza:tag("delay", { xmlns = xmlns_delay, from = bare_jid, stamp = datetime.datetime()});
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82 return stanza;
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83 end
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84
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85 local function is_important(stanza, session)
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86 local st_name = stanza and stanza.name or nil;
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87 if not st_name then return true; end -- nonzas are always important
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88 if st_name == "presence" then
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89 -- TODO check for MUC status codes?
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90 return false;
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91 elseif st_name == "message" then
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92 -- unpack carbon copies
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93 local carbon, stanza_direction = extract_carbon(stanza);
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94 --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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95 if carbon then stanza = carbon; end
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96
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97 local st_type = stanza.attr.type;
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98 -- headline message are always not important
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99 if st_type == "headline" then return false; end
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100
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101 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications
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102 if stanza:child_with_ns("urn:xmpp:chat-markers:0") then return true; end;
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103
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104 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here
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105 --if carbon and stanza_direction == "out" then return false; end
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106
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parents: 2747
diff changeset
107 -- We can't check for body contents in encrypted messages, so let's treat them as important
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
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parents: 2747
diff changeset
108 -- Some clients don't even set a body or an empty body for encrypted messages
2946
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Michel Le Bihan <michel@lebihan.pl>
parents: 2757
diff changeset
109
2735
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parents: 2606
diff changeset
110 -- check omemo https://xmpp.org/extensions/inbox/omemo.html
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parents: 2606
diff changeset
111 if stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return true; end
2946
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Michel Le Bihan <michel@lebihan.pl>
parents: 2757
diff changeset
112
2735
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parents: 2606
diff changeset
113 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html
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parents: 2606
diff changeset
114 if stanza:get_child("x", "jabber:x:encrypted") then return true; end
2946
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Michel Le Bihan <michel@lebihan.pl>
parents: 2757
diff changeset
115
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
116 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html
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parents: 2606
diff changeset
117 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end
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Michel Le Bihan <michel@lebihan.pl>
parents: 2757
diff changeset
118
2606
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
119 local body = stanza:get_child_text("body");
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parents:
diff changeset
120 if st_type == "groupchat" then
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
121 if stanza:get_child_text("subject") then return true; end
2746
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
122 if body == nil or body == "" then return false; end
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
123 -- body contains text, let's see if we want to process it further
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
124 if filter_muc then
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
125 if body:find(session.username, 1, true) then return true; end
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
126 local rooms = session.rooms_joined;
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parents: 2745
diff changeset
127 if not rooms then return false; end
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tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
128 local room_nick = rooms[jid.bare(stanza_direction == "in" and stanza.attr.from or stanza.attr.to)];
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
129 if room_nick and body:find(room_nick, 1, true) then return true; end
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
130 return false;
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
131 else
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
132 return true;
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
133 end
2606
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parents:
diff changeset
134 end
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parents:
diff changeset
135 return body ~= nil and body ~= "";
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parents:
diff changeset
136 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
137 return true;
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
138 end
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parents:
diff changeset
139
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
140 module:hook("csi-client-inactive", function (event)
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
141 local session = event.origin;
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
142 if session.pump then
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
143 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id);
2606
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
144 session.pump:pause();
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
145 else
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
146 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive the first time, initializing module for this session", id);
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
147 local pump = new_pump(session.send, 100);
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
148 pump:pause();
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
149 session.pump = pump;
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parents:
diff changeset
150 session._pump_orig_send = session.send;
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
151 function session.send(stanza)
2745
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parents: 2742
diff changeset
152 session.log("debug", "mod_csi_battery_saver(%s): Got outgoing stanza: <%s>", id, tostring(stanza.name or stanza));
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
153 local important = is_important(stanza, session);
2742
2e30bb3a10d5 mod_csi_battery_saver: Fix a bug introduced by commit f43c77c69a8a
tmolitor <thilo@eightysoft.de>
parents: 2741
diff changeset
154 -- clone stanzas before adding delay stamp and putting them into the queue
2e30bb3a10d5 mod_csi_battery_saver: Fix a bug introduced by commit f43c77c69a8a
tmolitor <thilo@eightysoft.de>
parents: 2741
diff changeset
155 if st.is_stanza(stanza) then stanza = st.clone(stanza); end
2735
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
156 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped
2606
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
157 if not important and is_stamp_needed(stanza, session) then stanza = add_stamp(stanza, session); end
2742
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tmolitor <thilo@eightysoft.de>
parents: 2741
diff changeset
158 -- add stanza to outgoing queue and flush the buffer if needed
2606
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
159 pump:push(stanza);
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
160 if important then
2741
69248dcd7cff mod_csi_battery_saver: Fix interaction with smacks hibernation
tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
161 session.log("debug", "mod_csi_battery_saver(%s): Encountered important stanza, flushing buffer: <%s>", id, tostring(stanza.name or stanza));
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
162 pump:flush();
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
163 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
164 return true;
538c54d2dab3 mod_csi_battery_saver: CSI module to save battery on mobile devices, based on mod_csi_pump
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parents:
diff changeset
165 end
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parents:
diff changeset
166 end
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
167 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
168
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
169 module:hook("csi-client-active", function (event)
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
170 local session = event.origin;
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
171 if session.pump then
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
172 session.log("debug", "mod_csi_battery_saver(%s): Client is active, resuming direct delivery", id);
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
173 session.pump:resume();
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
174 end
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
175 end);
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parents:
diff changeset
176
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parents: 2946
diff changeset
177 -- clean up this session on hibernation end
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parents: 2742
diff changeset
178 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
179 module:hook("smacks-hibernation-end", function (event)
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parents: 2742
diff changeset
180 local session = event.resumed;
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
181 if session.pump then
3109
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tmolitor <thilo@eightysoft.de>
parents: 2946
diff changeset
182 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended, flushing buffer and afterwards disabling for this session", id);
2745
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
183 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume
b62cec32680e mod_csi_battery_saver: Fix bug when smacks is resumed before hibernating
tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
184 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
185 -- session.send = session._pump_orig_send;
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parents: 2742
diff changeset
186 session.pump = nil;
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parents: 2742
diff changeset
187 session._pump_orig_send = nil;
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parents: 2742
diff changeset
188 end
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tmolitor <thilo@eightysoft.de>
parents: 2946
diff changeset
189 end, 1000); -- high priority to prevent message reordering on resumption (we want to flush our buffers *first*)
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parents: 2737
diff changeset
190
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
191 function module.unload()
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
192 module:log("info", "%s: Unloading module, flushing all buffers", id);
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
193 local host_sessions = prosody.hosts[module.host].sessions;
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
194 for _, user in pairs(host_sessions) do
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
195 for _, session in pairs(user.sessions) do
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parents: 2742
diff changeset
196 if session.pump then
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parents: 2742
diff changeset
197 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id);
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parents: 2742
diff changeset
198 session.pump:flush();
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parents: 2742
diff changeset
199 session.send = session._pump_orig_send;
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parents: 2742
diff changeset
200 session.pump = nil;
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parents: 2742
diff changeset
201 session._pump_orig_send = nil;
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parents: 2742
diff changeset
202 end
2606
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parents:
diff changeset
203 end
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parents:
diff changeset
204 end
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
205 end
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parents:
diff changeset
206
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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
207 module:log("info", "%s: Successfully loaded module", id);