#!/usr/bin/env python
#
# a python module for submitting content to a drupal server
#

import xmlrpclib
import time
import random
import hmac
import hashlib
import datetime
import dateutil.parser

AUTH_FILE = "stadtgestalten_auth.conf"


def send_xmlrpc_request(server, session, api_key, api_domain, method, args=[]):
	timestamp = str(int(time.time()))
	nonce = str(random.Random().randint(0, 1000000000))
	hash_base_string = ";".join([timestamp, api_domain, nonce, method])
	hash = hmac.HMAC(api_key, hash_base_string, hashlib.sha256).hexdigest()

	api_uri = server
	for item in method.split("."):
		api_uri = getattr(api_uri, item)
	if isinstance(args, dict):
		arr = []
		for key, value in args.items():
			arr.append(key)
			arr.append(value)
		return api_uri(hash, api_domain, timestamp, nonce, session['sessid'], args)
	elif not isinstance(args, list):
		args = [args]
	if len(args) == 0:
		return api_uri(hash, api_domain, timestamp, nonce, session['sessid'])
	elif len(args) == 1:
		return api_uri(hash, api_domain, timestamp, nonce, session['sessid'], args[0])
	elif len(args) == 2:
		return api_uri(hash, api_domain, timestamp, nonce, session['sessid'], args[0], args[1])
	elif len(args) == 3:
		return api_uri(hash, api_domain, timestamp, nonce, session['sessid'], args[0], args[1], args[2])
	else:
		return False


def generate_node(title, body, username, time_start, time_finish=None, time_duration_minutes=None):
	# parse "time_start", if necessary
	if isinstance(time_start, basestring):
		time_start = dateutil.parser.parse(time_start)
	# calculate "time_finish" if it is not defined
	if time_finish is None:
		if time_duration_minutes is None:
			time_finish = time_start + datetime.timedelta(hours=2)
		else:
			time_finish = time_start + time_duration_minutes
	elif isinstance(time_finish, basestring):
		time_finish = dateutil.parser.parse(time_finish)
	return {'type': 'termin',
			'title': title,
			'body': body,
			'name': username,
			# new nodes will not be published immediately (status=0)
			'status': 0,
			'field_kategorie': { 'value': [] },
			'field_termin': {
				'value': {
					'date': time_start.strftime("%d.%m.%Y"),
					'time': time_start.strftime("%H:%M"),
					},
				'value2': {
					'date': time_finish.strftime("%d.%m.%Y"),
					'time': time_finish.strftime("%H:%M"),
					},
				'rrule': {
					'FREQ': 'NONE',
					'INTERVAL': 0,
					'advanced': { 'BYDAY': [''], 'BYMONTH': [''], 'BYMONTHDAY': [''], },
					},
				}
			}


def submit_drupal_node(auth_file, title, body, time_start, time_finish=None, time_duration_minutes=None):
	url, api_key, api_domain, username, password = file(auth_file).read().splitlines()

	server = xmlrpclib.ServerProxy(url)
	# create a session
	session = server.system.connect()
	# login
	session = send_xmlrpc_request(server, session, api_key, api_domain, "user.login", [username, password])
	node = generate_node(title, body, username, time_start, time_finish, time_duration_minutes)
	result = send_xmlrpc_request(server, session, api_key, api_domain, "node.save", node)
	send_xmlrpc_request(server, session, api_key, api_domain, "user.logout")
	return result > 0


if __name__ == "__main__":
	print submit_drupal_node(AUTH_FILE, "Der Titel", "der Inhalt", datetime.datetime.now())