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annotate mod_csi_battery_saver/mod_csi_battery_saver.lua @ 2757:595d9d68fd11

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mod_csi_battery_saver: Fix #921 See also https://mail.jabber.org/pipermail/standards/2017-May/032773.html
author tmolitor <thilo@eightysoft.de>
date Sun, 27 Aug 2017 21:35:08 +0200
parents d1aa5fc005f7
children dfac28504e86
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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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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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tmolitor <thilo@eightysoft.de>
parents:
diff changeset
107 elseif st_name == "message" 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
108 -- unpack carbon copies
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
109 local stanza_direction = "in";
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
110 local carbon;
2754
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
111 local st_type;
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
112 -- support carbon copied message stanzas having an arbitrary message-namespace or no message-namespace at all
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
113 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:2}/forwarded/message"); 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
114 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:1}/forwarded/message"); 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
115 stanza_direction = carbon and stanza:child_with_name("sent") and "out" or "in";
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
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));
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
117 if carbon then stanza = carbon; end
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parents: 2747
diff changeset
118 st_type = stanza.attr.type;
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parents: 2747
diff changeset
119
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tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
120 -- headline message are always not important
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tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
121 if st_type == "headline" then return false; end
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parents: 2747
diff changeset
122
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tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
123 -- chat markers (XEP-0333) are important, too, because some clients use them to update their notifications
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
124 if find(stanza, "{urn:xmpp:chat-markers:0}") then return true; end;
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
125
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
126 -- carbon copied outgoing messages are important (some clients update their notifications upon receiving those) --> don't return false here
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
127 --if carbon and stanza_direction == "out" then return false; end
d1aa5fc005f7 mod_csi_battery_saver: Consider chat markers and outgoing carbon copies as important.
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parents: 2747
diff changeset
128
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parents: 2747
diff changeset
129 -- 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.
tmolitor <thilo@eightysoft.de>
parents: 2747
diff changeset
130 -- Some clients don't even set a body or an empty body for encrypted messages
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parents: 2747
diff changeset
131
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parents: 2606
diff changeset
132 -- check omemo https://xmpp.org/extensions/inbox/omemo.html
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
133 if stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return true; end
2754
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parents: 2747
diff changeset
134
2735
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parents: 2606
diff changeset
135 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
136 if stanza:get_child("x", "jabber:x:encrypted") then return true; end
2754
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parents: 2747
diff changeset
137
2735
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
138 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
139 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end
2754
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parents: 2747
diff changeset
140
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
141 local body = stanza:get_child_text("body");
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
142 if st_type == "groupchat" 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
143 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
144 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
145 -- 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
146 if filter_muc then
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
147 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
148 local rooms = session.rooms_joined;
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tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
149 if not rooms then return false; end
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
150 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
151 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
152 return false;
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
153 else
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
154 return true;
d3a2f4bdaf09 mod_csi_battery_saver: Add config option for better muc handling
tmolitor <thilo@eightysoft.de>
parents: 2745
diff changeset
155 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
156 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
157 return body ~= nil and body ~= "";
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
158 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
159 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
160 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
161
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 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
163 local session = event.origin;
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 if session.pump then
2745
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
165 session.log("debug", "mod_csi_battery_saver(%s): Client is inactive, buffering unimportant outgoing stanzas", id);
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
166 session.pump:pause();
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
167 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
168 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
169 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
170 pump:pause();
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
171 session.pump = pump;
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._pump_orig_send = session.send;
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 function session.send(stanza)
2745
b62cec32680e mod_csi_battery_saver: Fix bug when smacks is resumed before hibernating
tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
174 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
175 local important = is_important(stanza, session);
2742
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tmolitor <thilo@eightysoft.de>
parents: 2741
diff changeset
176 -- 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
177 if st.is_stanza(stanza) then stanza = st.clone(stanza); end
2735
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tmolitor <thilo@eightysoft.de>
parents: 2606
diff changeset
178 -- add delay stamp to unimportant (buffered) stanzas that can/need be stamped
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
179 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
180 -- add stanza to outgoing queue and flush the buffer if needed
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
181 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
182 if important then
2741
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
183 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
184 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
185 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
186 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
187 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
188 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
189 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
190
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
191 module:hook("csi-client-active", 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
192 local session = event.origin;
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
193 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
194 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
195 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
196 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
197 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
198
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
199 -- clean up this session on hibernation start
b62cec32680e mod_csi_battery_saver: Fix bug when smacks is resumed before hibernating
tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
200 module:hook("smacks-hibernation-start", function (event)
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
201 local session = event.origin;
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
202 if session.pump then
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
203 session.log("debug", "mod_csi_battery_saver(%s): Hibernation started, flushing buffer and afterwards disabling for this session", id);
2741
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
204 session.pump:flush();
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
205 session.send = session._pump_orig_send;
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
206 session.pump = nil;
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tmolitor <thilo@eightysoft.de>
parents: 2737
diff changeset
207 session._pump_orig_send = nil;
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parents: 2737
diff changeset
208 end
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parents: 2742
diff changeset
209 end);
2741
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parents: 2737
diff changeset
210
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
211 -- clean up this session on hibernation end as well
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tmolitor <thilo@eightysoft.de>
parents: 2742
diff changeset
212 -- but don't change resumed.send(), it is already overwritten with session.send() by the smacks module
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213 module:hook("smacks-hibernation-end", function (event)
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214 local session = event.resumed;
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215 if session.pump then
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216 session.log("debug", "mod_csi_battery_saver(%s): Hibernation ended without being started, flushing buffer and afterwards disabling for this session", id);
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217 session.pump:flush(session.send); -- use the fresh session.send() introduced by the smacks resume
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218 -- don't reset session.send() because this is not the send previously overwritten by this module, but a fresh one
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219 -- session.send = session._pump_orig_send;
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220 session.pump = nil;
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221 session._pump_orig_send = nil;
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222 end
2741
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223 end);
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224
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225 function module.unload()
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226 module:log("info", "%s: Unloading module, flushing all buffers", id);
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227 local host_sessions = prosody.hosts[module.host].sessions;
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228 for _, user in pairs(host_sessions) do
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229 for _, session in pairs(user.sessions) do
2745
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230 if session.pump then
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231 session.log("debug", "mod_csi_battery_saver(%s): Flushing buffer and restoring to original session.send()", id);
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232 session.pump:flush();
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233 session.send = session._pump_orig_send;
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234 session.pump = nil;
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235 session._pump_orig_send = nil;
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236 end
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237 end
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238 end
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239 end
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240
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241 module:log("info", "%s: Successfully loaded module", id);