import CryptoBoxPlugin
from CryptoBoxExceptions import *


class volume_props(CryptoBoxPlugin.CryptoBoxPlugin):

	pluginCapabilities = [ "volume" ]
	pluginVisibility = [ "volume" ]
	requestAuth = False
	rank = 40


	def doAction(self, store=None, vol_name=None, old_pw=None, new_pw=None, new_pw2=None):
		self.container = self.cbox.getContainer(self.device)
		if not self.container:
			return None
		self.__prepareHDF()
		if store == "set_name":
			return self.__setVolumeName(vol_name)
		elif store == "change_pw":
			return self.__changePassword(old_pw, new_pw, new_pw2)
		elif not store:
			return "volume_properties"
		else:
			self.cbox.log.info("plugin 'volume_props' - unknown action: %s" % store)
			return "volume_properties"
	

	def getStatus(self):
		self.container = self.cbox.getContainer(self.device)
		if not self.container:
			return "invalid device"
		return "name=%s" % self.container.getName()
	

	def __prepareHDF(self):
		self.hdf[self.hdf_prefix + "vol_name"] = self.container.getName()
	

	def __setVolumeName(self, vol_name):
		if not vol_name:
			self.hdf["Data.Warning"] = "Plugins.volume_props.InvalidVolumeName"
			return "volume_properties"
		if vol_name == self.container.getName():
			## nothing has to be done
			return "volume_properties"
		try:
			self.container.setName(vol_name)
		except CBInvalidName:
			self.hdf["Data.Warning"] = "Plugins.volume_props.InvalidVolumeName"
		except CBNameActivelyUsed:
			self.hdf["Data.Warning"] = "Plugins.volume_props.VolumeNameIsInUse"
		except CBContainerError:
			self.hdf["Data.Warning"] = "Plugins.volume_props.SetVolumeNameFailed"
		## reread the volume name
		self.__prepareHDF()
		return "volume_properties"


	def __changePassword(self, old_pw, new_pw, new_pw2):
		if not old_pw:
			self.hdf["Data.Warning"] = "EmptyPassword"
		elif not new_pw:
			self.hdf["Data.Warning"] = "EmptyNewPassword"
		elif new_pw != new_pw2:
			self.hdf["Data.Warning"] = "DifferentPasswords"
		elif old_pw == new_pw:
			## do nothing
			pass
		else:
			try:
				self.container.changePassword(old_pw, new_pw)
			except CBInvalidType, errMsg:
				self.cbox.log.info("plugin 'volume_props' - cannot change passphrase for non-encrypted container (%s): %s" % (self.device, errMsg))
			except CBVolumeIsActive:
				self.hdf["Data.Warning"] = "VolumeMayNotBeMounted"
			except CBChangePasswordError, errMsg:
				self.cbox.log.warn("plugin 'volume_props' - cannot change password for device (%s): %s" % (self.device, errMsg))
				self.hdf["Data.Warning"] = "Plugins.volume_props.PasswordChange"
			else:
				self.hdf["Data.Success"] = "Plugins.volume_props.PasswordChange"
		return "volume_properties"