webgo/login.py

import psql,init_webgo,helper,gamecreation
import time
from mod_python import *

def process_form(req,form):
	"""
	reads username and passsword from form
	"""
	#if form == empty (which means if page is displayed for the first time):
	req.write(str(form.keys()))
	#req.write("<br>"+"name="+form['name']+", password="+form['password']+"<hr>")
	if form.keys() != []:

		if ("name" in form.keys()) and ("password" in form.keys()):
			#extract name and password
			name		= form["name"]
			password	= form["password"]
			sessionid	= form["sessionid"]
			origpassword = psql.get_user_info(name,"password")
			#check if user exists (else we would get an error string)
			if origpassword != "no such user": #no error message, now check password
				if password == origpassword:
					#login accepted
					psql.set_user_sessionid(name,sessionid)
					psql.set_user_timeout(name)
					#now display list of games.
					game_overview_form(req,name,sessionid)
				else:
					req.write("Login incorrect. Please try again.<br>")
					req.write(login_form())
			else: #no such user
				req.write("Login incorrect. Please try again.<br>")
				req.write(login_form())
		else: #one of (name,password) is missing:
			req.write("Please enter your name and password.")
			req.write(login_form())	


def game_overview_form(req,user,sessionid):
	"""
	gets the name of a user and the queue of games.
	prints a form with the option to select,create and delete games.
	"""
	data = helper.header()+ """
	<h2> Current Games: </h2>
	<form  method="post">
	"""
	gamelist = psql.get_user_game_list(user)
	req.write(str(gamelist)+"<hr>\n")
	#display list of current games
	counter = 10
	tmp = ""
	for item in gamelist:
		if (item != None) and (item != "None"):
			tmp += '<input type="radio"> name="game" value="%s"> %s\n' % (item,item)
			tmp += '<input type="hidden" name="sessionid" value="%s">\n' % sessionid
			tmp += '<input type="hidden" name="username" value="%s">\n' % user
			#later write partners name and whether its our turn or not
			#data += "Your partner: %s."
			tmp +="<br>"
			counter -= 1
	if tmp == "": #no current games
		data += "You don't have any running games.\n"
	else:
		data += tmp
		data += '<input type=submit name="play" value="Play selected game">\n<input type=submit name="delete" value="Delete selected game">\n</form>'
	#now comes the option for	creating new games.
	data += "<h2>Start a new Game</h2>\n"
	if counter > 0:
		data+= "You have %s free game slots.<br>" % counter
		data += """
		<form>
		<input type=submit name="create" value="Start a new game">
		<input type="hidden" name="sessionid" value="%s">
		<input type="hidden" name="username" value="%s">
		
		</form>
		""" %  (sessionid, user)
	else:
		data+= "Sorry, all your game slots are in use."
	#display "You have ... free game slots" + Button "create game"
		#bei "create game neue funktion zum Erstellen + Mitspieler aus Liste ausw<73>hlen.
	data+=helper.footer()
	#check for timeout:
	if (psql.get_user_info(user,'timeout') >= int(time.time())) and (sessionid == psql.get_user_info(user,'sessionid')):
		req.write(data)
	else:
		req.write(helper.header()+ 'your session timed out'+helper.footer())

def login_form():
	"""
	print welcome message and html form.
	"""
	data = 	helper.header() + """

	<form  method="post">
	<p>Name:<br>
	<input name="name" size="40"></p>
	<p>Pasword:<br>
	<input name="password" size="40"></p>
	<input type="hidden" name="sessionid" value="%s">
	<p><input type="submit" value="login"></p>
	</form>
	"""  % helper.generate_session_id()
	data += helper.footer()



	return data




def main(req):
	#get instance of fieldstorage
	form = util.FieldStorage(req)
	if "sessionid" not in form.keys():
		req.write(login_form())
	elif ("create" in form.keys()) and ("username" in form.keys()):
		#user wants to create a new game
		gamecreation.main(req,form)
	else:
		process_form(req,form)