1 files changed, 276 insertions, 0 deletions
diff --git a/core/loggingmanager.lua b/core/loggingmanager.lua
new file mode 100644
index 00000000..c69dede8
--- /dev/null
+++ b/core/loggingmanager.lua
@@ -0,0 +1,276 @@
+-- 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 format = string.format;
+local setmetatable, rawset, pairs, ipairs, type =
+	setmetatable, rawset, pairs, ipairs, type;
+local io_open, io_write = io.open, io.write;
+local math_max, rep = math.max, string.rep;
+local os_date = os.date;
+local getstyle, setstyle = require "util.termcolours".getstyle, require "util.termcolours".setstyle;
+
+if os.getenv("__FLUSH_LOG") then
+	local io_flush = io.flush;
+	local _io_write = io_write;
+	io_write = function(...) _io_write(...); io_flush(); end
+end
+
+local config = require "core.configmanager";
+local logger = require "util.logger";
+local prosody = prosody;
+
+_G.log = logger.init("general");
+
+module "loggingmanager"
+
+-- The log config used if none specified in the config file (see reload_logging for initialization)
+local default_logging;
+local default_file_logging;
+local default_timestamp = "%b %d %H:%M:%S";
+-- The actual config loggingmanager is using
+local logging_config;
+
+local apply_sink_rules;
+local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
+local get_levels;
+local logging_levels = { "debug", "info", "warn", "error" }
+
+-- Put a rule into action. Requires that the sink type has already been registered.
+-- This function is called automatically when a new sink type is added [see apply_sink_rules()]
+local function add_rule(sink_config)
+	local sink_maker = log_sink_types[sink_config.to];
+	if sink_maker then
+		-- Create sink
+		local sink = sink_maker(sink_config);
+		
+		-- Set sink for all chosen levels
+		for level in pairs(get_levels(sink_config.levels or logging_levels)) do
+			logger.add_level_sink(level, sink);
+		end
+	else
+		-- No such sink type
+	end
+end
+
+-- Search for all rules using a particular sink type, and apply
+-- them. Called automatically when a new sink type is added to
+-- the log_sink_types table.
+function apply_sink_rules(sink_type)
+	if type(logging_config) == "table" then
+		
+		for _, level in ipairs(logging_levels) do
+			if type(logging_config[level]) == "string" then
+				local value = logging_config[level];
+				if sink_type == "file" and not value:match("^%*") then
+					add_rule({
+						to = sink_type;
+						filename = value;
+						timestamps = true;
+						levels = { min = level };
+					});
+				elseif value == "*"..sink_type then
+					add_rule({
+						to = sink_type;
+						levels = { min = level };
+					});
+				end
+			end
+		end
+		
+		for _, sink_config in ipairs(logging_config) do
+			if (type(sink_config) == "table" and sink_config.to == sink_type) then
+				add_rule(sink_config);
+			elseif (type(sink_config) == "string" and sink_config:match("^%*(.+)") == sink_type) then
+				add_rule({ levels = { min = "debug" }, to = sink_type });
+			end
+		end
+	elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
+		-- User specified simply a filename, and the "file" sink type
+		-- was just added
+		for _, sink_config in pairs(default_file_logging) do
+			sink_config.filename = logging_config;
+			add_rule(sink_config);
+			sink_config.filename = nil;
+		end
+	elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
+		-- Log all levels (debug+) to this sink
+		add_rule({ levels = { min = "debug" }, to = sink_type });
+	end
+end
+
+
+
+--- Helper function to get a set of levels given a "criteria" table
+function get_levels(criteria, set)
+	set = set or {};
+	if type(criteria) == "string" then
+		set[criteria] = true;
+		return set;
+	end
+	local min, max = criteria.min, criteria.max;
+	if min or max then
+		local in_range;
+		for _, level in ipairs(logging_levels) do
+			if min == level then
+				set[level] = true;
+				in_range = true;
+			elseif max == level then
+				set[level] = true;
+				return set;
+			elseif in_range then
+				set[level] = true;
+			end
+		end
+	end
+	
+	for _, level in ipairs(criteria) do
+		set[level] = true;
+	end
+	return set;
+end
+
+-- Initialize config, etc. --
+function reload_logging()
+	local old_sink_types = {};
+	
+	for name, sink_maker in pairs(log_sink_types) do
+		old_sink_types[name] = sink_maker;
+		log_sink_types[name] = nil;
+	end
+	
+	logger.reset();
+
+	local debug_mode = config.get("*", "debug");
+
+	default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
+	default_file_logging = {
+		{ to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true }
+	};
+	default_timestamp = "%b %d %H:%M:%S";
+
+	logging_config = config.get("*", "log") or default_logging;
+	
+	
+	for name, sink_maker in pairs(old_sink_types) do
+		log_sink_types[name] = sink_maker;
+	end
+	
+	prosody.events.fire_event("logging-reloaded");
+end
+
+reload_logging();
+prosody.events.add_handler("config-reloaded", reload_logging);
+
+--- Definition of built-in logging sinks ---
+
+-- Null sink, must enter log_sink_types *first*
+function log_sink_types.nowhere()
+	return function () return false; end;
+end
+
+-- Column width for "source" (used by stdout and console)
+local sourcewidth = 20;
+
+function log_sink_types.stdout(config)
+	local timestamps = config.timestamps;
+	
+	if timestamps == true then
+		timestamps = default_timestamp; -- Default format
+	end
+	
+	return function (name, level, message, ...)
+		sourcewidth = math_max(#name+2, sourcewidth);
+		local namelen = #name;
+		if timestamps then
+			io_write(os_date(timestamps), " ");
+		end
+		if ... then
+			io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
+		else
+			io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
+		end
+	end
+end
+
+do
+	local do_pretty_printing = true;
+	
+	local logstyles = {};
+	if do_pretty_printing then
+		logstyles["info"] = getstyle("bold");
+		logstyles["warn"] = getstyle("bold", "yellow");
+		logstyles["error"] = getstyle("bold", "red");
+	end
+	function log_sink_types.console(config)
+		-- Really if we don't want pretty colours then just use plain stdout
+		if not do_pretty_printing then
+			return log_sink_types.stdout(config);
+		end
+		
+		local timestamps = config.timestamps;
+
+		if timestamps == true then
+			timestamps = default_timestamp; -- Default format
+		end
+
+		return function (name, level, message, ...)
+			sourcewidth = math_max(#name+2, sourcewidth);
+			local namelen = #name;
+			
+			if timestamps then
+				io_write(os_date(timestamps), " ");
+			end
+			io_write(name, rep(" ", sourcewidth-namelen));
+			setstyle(logstyles[level]);
+			io_write(level);
+			setstyle();
+			if ... then
+				io_write("\t", format(message, ...), "\n");
+			else
+				io_write("\t", message, "\n");
+			end
+		end
+	end
+end
+
+local empty_function = function () end;
+function log_sink_types.file(config)
+	local log = config.filename;
+	local logfile = io_open(log, "a+");
+	if not logfile then
+		return empty_function;
+	end
+	local write, flush = logfile.write, logfile.flush;
+
+	local timestamps = config.timestamps;
+
+	if timestamps == nil or timestamps == true then
+		timestamps = default_timestamp; -- Default format
+	end
+
+	return function (name, level, message, ...)
+		if timestamps then
+			write(logfile, os_date(timestamps), " ");
+		end
+		if ... then
+			write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
+		else
+			write(logfile, name, "\t" , level, "\t", message, "\n");
+		end
+		flush(logfile);
+	end;
+end
+
+function register_sink_type(name, sink_maker)
+	local old_sink_maker = log_sink_types[name];
+	log_sink_types[name] = sink_maker;
+	return old_sink_maker;
+end
+
+return _M;