-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

--

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local t_insert = table.insert;

local function select_top_resources(user)

	local priority = 0;

	local recipients = {};

	for _, session in pairs(user.sessions) do -- find resource with greatest priority

		if session.presence then

			local p = session.priority;

			if p > priority then

				priority = p;

				recipients = {session};

			elseif p == priority then

				t_insert(recipients, session);

			end

		end

	end

	return recipients;

end

local function recalc_resource_map(user)

	if user then

		user.top_resources = select_top_resources(user);

		if #user.top_resources == 0 then user.top_resources = nil; end

	end

end

return {

	select_top_resources = select_top_resources;

	recalc_resource_map = recalc_resource_map;

}