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plugins/muc/occupant.lib.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 | 7086:6cc7c9da29ed |
child | 12977:74b9e05af71e |
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local pairs = pairs; local setmetatable = setmetatable; local st = require "util.stanza"; local util = module:require "muc/util"; local function get_filtered_presence(stanza) return util.filter_muc_x(st.clone(stanza)); end local occupant_mt = {}; occupant_mt.__index = occupant_mt; local function new_occupant(bare_real_jid, nick) return setmetatable({ bare_jid = bare_real_jid; nick = nick; -- in-room jid sessions = {}; -- hash from real_jid to presence stanzas. stanzas should not be modified role = nil; jid = nil; -- Primary session }, occupant_mt); end -- Deep copy an occupant local function copy_occupant(occupant) local sessions = {}; for full_jid, presence_stanza in pairs(occupant.sessions) do -- Don't keep unavailable presences, as they'll accumulate; unless they're the primary session if presence_stanza.attr.type ~= "unavailable" or full_jid == occupant.jid then sessions[full_jid] = presence_stanza; end end return setmetatable({ bare_jid = occupant.bare_jid; nick = occupant.nick; sessions = sessions; role = occupant.role; jid = occupant.jid; }, occupant_mt); end -- finds another session to be the primary (there might not be one) function occupant_mt:choose_new_primary() for jid, pr in self:each_session() do if pr.attr.type == nil then return jid; end end return nil; end function occupant_mt:set_session(real_jid, presence_stanza, replace_primary) local pr = get_filtered_presence(presence_stanza); pr.attr.from = self.nick; pr.attr.to = real_jid; self.sessions[real_jid] = pr; if replace_primary then self.jid = real_jid; elseif self.jid == nil or (pr.attr.type == "unavailable" and self.jid == real_jid) then -- Only leave an unavailable presence as primary when there are no other options self.jid = self:choose_new_primary() or real_jid; end end function occupant_mt:remove_session(real_jid) -- Delete original session self.sessions[real_jid] = nil; if self.jid == real_jid then self.jid = self:choose_new_primary(); end end function occupant_mt:each_session() return pairs(self.sessions) end function occupant_mt:get_presence(real_jid) return self.sessions[real_jid or self.jid] end return { new = new_occupant; copy = copy_occupant; mt = occupant_mt; }