cryptonas-branches/pythonrewrite/bin/CryptoBoxPlugin.py

# $Id$
#
# parent class for all plugins of the CryptoBox
#

import os


class CryptoBoxPlugin:

	## default capability is "system" - the other supported capability is: "volume"
	pluginCapabilities = [ "system" ]

	## does this plugin require admin authentification?
	requestAuth = False

	## is this plugin enabled by default?
	enabled = True

	## default rank (0..100) of the plugin in listings (lower value means higher priority)
	rank = 80

	def __init__(self, cbox, pluginDir):
		self.cbox = cbox
		self.hdf = {}
		self.pluginDir = pluginDir
		self.hdf_prefix = "Data.Plugins.%s." % self.getName()


	def doAction(self, **args):
		"""override doAction with your plugin code"""
		raise Exception, "undefined action handler ('doAction') in plugin '%'" % self.getName()
	

	def getStatus(self):
		"""you should override this, to supply useful state information"""
		raise Exception, "undefined state handler ('getStatus') in plugin '%'" % self.getName()
	

	def getName(self):
		"""the name of the python file (module) should be the name of the plugin"""
		return self.__module__


	def getTemplateFileName(self, template_name):
		"""return the filename of the template, if it is part of this plugin

		use this function to check, if the plugin provides the specified template
		"""
		result_file = os.path.join(self.pluginDir, template_name + ".cs")
		if os.access(result_file, os.R_OK) and os.path.isfile(result_file):
			return result_file
		else:
			return None


	def getLanguageData(self, lang="en"):
		import neo_cgi, neo_util
		langdir = os.path.abspath(os.path.join(self.pluginDir, "lang"))
		## first: the default language file (english)
		langFiles = [os.path.join(langdir, "en.hdf")]
		## maybe we have to load a translation afterwards
		if lang != "en":
			langFiles.append(os.path.join(langdir, lang + ".hdf"))
		for langFile in langFiles:
			if os.access(langFile, os.R_OK):
				lang_hdf = neo_util.HDF()
				lang_hdf.readFile(langFile)
				return lang_hdf
		self.cbox.log.debug("Couldn't find a valid plugin language file (%s)" % str(langFiles))
		return None


	def loadDataSet(self, hdf):
		for (key, value) in self.hdf.items():
			hdf.setValue(key, str(value))


	def isAuthRequired(self):
		"""check if this plugin requires authentication
		first step: check plugin configuration
		second step: check default value of plugin"""
		try:
			if self.cbox.prefs.pluginConf[self.getName()]["requestAuth"] is None:
				return self.requestAuth
			if self.cbox.prefs.pluginConf[self.getName()]["requestAuth"]:
				return True
			else:
				return False
		except KeyError:
			return self.requestAuth


	def isEnabled(self):
		"""check if this plugin is enabled
		first step: check plugin configuration
		second step: check default value of plugin"""
		import types
		try:
			if self.cbox.prefs.pluginConf[self.getName()]["enabled"] is None:
				return self.enabled
			if self.cbox.prefs.pluginConf[self.getName()]["enabled"]:
				return True
			else:
				return False
		except KeyError:
			return self.enabled


	def getRank(self):
		"""check the rank of this plugin
		first step: check plugin configuration
		second step: check default value of plugin"""
		try:
			if self.cbox.prefs.pluginConf[self.getName()]["rank"] is None:
				return self.rank
			return int(self.cbox.prefs.pluginConf[self.getName()]["rank"])
		except KeyError, TypeError:
			return self.rank


	def getTestClass(self):
		import imp
		pl_file = os.path.join(self.pluginDir, "unittests.py")
		if os.access(pl_file, os.R_OK) and os.path.isfile(pl_file):
			try:
				return getattr(imp.load_source("unittests_%s" % self.getName(), pl_file), "unittests")
			except AttributeError:
				pass
		try:
			self.cbox.log.info("could not load unittests for plugin: %s" % self.getName())
		except AttributeError:
			pass
		return None