# -*- coding: UTF-8 -*-
#
# Desc:    This file is part of the eCromedos document preparation system
# Date:    2006/03/09
# Author:  Tobias Koch (tkoch@ecromedos.net)
# License: GNU General Public License, version 2
# URL:     http://www.ecromedos.net
#

# std includes
import os, shutil

# ecmds includes
from error import ECMDSPluginError


def getInstance(config):
	'''Returns a plugin instance.'''
	return Plugin(config)
#end function


class Plugin:

	def __init__(self, config):
		try:
			self.data_dir = config['data_dir']
		except KeyError:
			msg = "Please specify the correct path to the data directory."
			raise ECMDSPluginError(msg, "data")
		#end try
	#end function


	def flush(self):
		pass
	#end function


	def process(self, node, format):
		'''Prepare @node for target @format.'''

		if format == "xhtml":
			for fname in ["prev.gif", "next.gif", "toc.gif"]:
				src = None
				dst = None
				try:
					try:
						src = file(os.path.join(self.data_dir, fname), "rb")
						dst = file(fname, "wb+")
						shutil.copyfileobj(src, dst)
					finally:
						if src: src.close()
						if dst: dst.close()
					#end try
				except Exception: pass
			#end for
		#end if
		
		return node
	#end function

#end class