-- 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 pcall = pcall;

local find = string.find;

local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;

module "logger"

local level_sinks = {};

local make_logger;

function init(name)

	local log_debug = make_logger(name, "debug");

	local log_info = make_logger(name, "info");

	local log_warn = make_logger(name, "warn");

	local log_error = make_logger(name, "error");

	return function (level, message, ...)

			if level == "debug" then

				return log_debug(message, ...);

			elseif level == "info" then

				return log_info(message, ...);

			elseif level == "warn" then

				return log_warn(message, ...);

			elseif level == "error" then

				return log_error(message, ...);

			end

		end

end

function make_logger(source_name, level)

	local level_handlers = level_sinks[level];

	if not level_handlers then

		level_handlers = {};

		level_sinks[level] = level_handlers;

	end

	local logger = function (message, ...)

		for i = 1,#level_handlers do

			level_handlers[i](source_name, level, message, ...);

		end

	end

	return logger;

end

function reset()

	for level, handler_list in pairs(level_sinks) do

		-- Clear all handlers for this level

		for i = 1, #handler_list do

			handler_list[i] = nil;

		end

	end

end

function add_level_sink(level, sink_function)

	if not level_sinks[level] then

		level_sinks[level] = { sink_function };

	else

		level_sinks[level][#level_sinks[level] + 1 ] = sink_function;

	end

end

_M.new = make_logger;

return _M;