#
# Copyright 2006 sense.lab e.V.
# 
# This file is part of the CryptoBox.
#
# The CryptoBox is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# The CryptoBox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#


"""The logs feature of the CryptoBox.
"""

__revision__ = "$Id"

import cryptobox.plugins.base
import os

class logs(cryptobox.plugins.base.CryptoBoxPlugin):
	"""The logs feature of the CryptoBox.
	"""

	plugin_capabilities = [ "system" ]
	plugin_visibility = [ "preferences" ]
	request_auth = False
	rank = 90

	def do_action(self, lines=50, size=3000, pattern=None):
		"""Show the latest part of the log file.
		"""
		import re
		## filter input
		try:
			lines = int(lines)
			if lines <= 0:
				raise(ValueError)
		except ValueError:
			lines = 50
		try:
			size = int(size)
			if size <= 0:
				raise(ValueError)
		except ValueError:
			size = 3000
		if not pattern is None:
			pattern = str(pattern)
			if re.search(u'\W', pattern):
				pattern = None
		self.hdf[self.hdf_prefix + "Content"] = self.__get_log_content(
				lines, size, pattern)
		self.hdf[self.hdf_prefix + "StyleSheetFile"] = os.path.abspath(os.path.join(
				self.plugin_dir, "logs.css"))
		return "show_log"


	def get_status(self):
		"""The current status includes the log configuration details.
		"""
		return "%s:%s:%s" % (
			self.cbox.prefs["Log"]["Level"],
			self.cbox.prefs["Log"]["Destination"],
			self.cbox.prefs["Log"]["Details"])


	def __get_log_content(self, lines, max_size, pattern):
		"""Filter, sort and shorten the log content.
		"""
		if pattern:
			content = []
			current_length = 0
			for line in self.cbox.get_log_data():
				if line.find(pattern) != -1:
					content.append(line)
					current_length += len(line)
					if lines and len(content) >= lines:
						break
					if max_size and current_length >= max_size:
						break
		else:
			content = self.cbox.get_log_data(lines, max_size)
		return "<br/>".join(content)