prosody
e54b8a5e35ad
util/presence.lua

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util/presence.lua @ 12446:e54b8a5e35ad 0.12

util.random: Test whether util.crand works before using it (fix #1734) util.crand can be configured at compile time to use the Linux getrandom() system call, available from Linux 3.17, but it is still possible to load it with an older kernel lacking that system call, where attempting to use it throws an ENOSYS error. By testing for this on load we can fall back to /dev/urandom in this case.
author Kim Alvefur <zash@zash.se>
date Sat, 02 Apr 2022 16:33:27 +0200
parent 8885:d4f5d47f874d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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051279755cad mod_presence: Move function for selecting "top resources" into a new util.presence
Kim Alvefur <zash@zash.se>
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1 -- Prosody IM
051279755cad mod_presence: Move function for selecting "top resources" into a new util.presence
Kim Alvefur <zash@zash.se>
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
051279755cad mod_presence: Move function for selecting "top resources" into a new util.presence
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local t_insert = table.insert;
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10
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11 local function select_top_resources(user)
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12 local priority = 0;
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13 local recipients = {};
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14 for _, session in pairs(user.sessions) do -- find resource with greatest priority
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15 if session.presence then
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16 local p = session.priority;
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17 if p > priority then
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18 priority = p;
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19 recipients = {session};
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20 elseif p == priority then
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21 t_insert(recipients, session);
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22 end
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23 end
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24 end
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25 return recipients;
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26 end
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27 local function recalc_resource_map(user)
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28 if user then
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29 user.top_resources = select_top_resources(user);
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30 if #user.top_resources == 0 then user.top_resources = nil; end
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31 end
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32 end
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33
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34 return {
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35 select_top_resources = select_top_resources;
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36 recalc_resource_map = recalc_resource_map;
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37 }