# npackage example  https://svn.lliurex.net/pandora/n4d-ldap/trunk
# jinja2 http://jinja.pocoo.org/docs/templates

from jinja2 import Environment
from jinja2.loaders import FileSystemLoader
from jinja2 import Template
import tempfile
import shutil
import os
import subprocess
class NetinstallManager:

	def __init__(self):
		#Load template file
		self.tpl_env = Environment(loader=FileSystemLoader('/usr/share/n4d/templates/netinstall'))
		pass
	#def init
	
	def startup(self,options):
		# executed when launching n4d
		pass
		
	#def startup

	def apt(self):
		# executed after apt operations
		pass
		
	#def apt
	
	# service test and backup functions #
	
	def test(self):

		pass
		
	#def test
	
	def backup(self):

		pass
		
	#def test
	
	def restore(self):

		pass
		
	#def test
		
	def load_exports(self):
		#Get template
		template_cname = self.tpl_env.get_template("cname")
		list_variables = {}
		
		###########################
		#Getting VARS
		###########################

		#Obtains INTERNAL_DOMAIN
		list_variables['INTERNAL_DOMAIN'] = objects['VariablesManager'].get_variable('INTERNAL_DOMAIN')
		#If INTERNAL_DOMAIN is not defined returns an error
		if  list_variables['INTERNAL_DOMAIN'] == None:
			return {'status':False,'msg':'Variable INTERNAL_DOMAIN not defined'}
			
		#Obtains HOSTNAME
		list_variables['HOSTNAME'] = objects['VariablesManager'].get_variable('HOSTNAME')
		#If variable SRV_IP is not defined returns an error
		if  list_variables['HOSTNAME'] == None:
			return {'status':False,'msg':'Variable HOSTNAME not defined'}
			
		#Encode vars to UTF-8
		string_template = template_cname.render(list_variables).encode('UTF-8')
		#Open template file
		fd, tmpfilepath = tempfile.mkstemp()
		new_export_file = open(tmpfilepath,'w')
		new_export_file.write(string_template)
		new_export_file.close()
		os.close(fd)
		#Write template values
		n4d_mv(tmpfilepath,'/var/lib/dnsmasq/config/cname-preseed',True,'root','root','0644',True )
		subprocess.Popen(['/etc/init.d/dnsmasq','restart'],stdout=subprocess.PIPE).communicate()
		return {'status':True,'msg':'Exports written'}
	#def load_exports
	# ######################### #
	
#class N4dProxy