webgo/gamecreation.py

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import helper,login,database
from cherrypy import cpg
from cherrypy.lib import httptools
def create_user_dropdown_list(listname,selected = ""):
"""
gets a name for the generated list and, optionally, the preselected value.
returns a <select> form as string.
"""
userlist = database.get_users_with_free_game_slots()
data = '<select name="%s">' % listname
for item in userlist:
#check whether current item = item for preselection
if item == selected:
tmp = 'selected'
else:
tmp = ''
data += '<option %s> %s </option>' % (tmp,item)
data += '</select>'
return data
class GameCreation:
"""
manages the creation of games.
"""
def index(self,player1 = None, player2 = None, description = None,gobansize = None):
username = cpg.request.sessionMap["username"]
myuser = database.Users.byUsername(username)
sessionid = cpg.request.sessionMap["_sessionId"]
if myuser.sessionid == sessionid:
if player1 != None and player2 != None and gobansize != None:
return self.process_creation_form(player1,player2,gobansize,description)
else:
return self.display_game_creation_form()
else:
return helper.cs_render("templates/not_logged_in.cs")
def display_game_creation_form(self, message = ""):
"""
prints a html form with multiple drop-down lists for choosing players,
goban size and so on.
TODO: authentication?
"""
username = cpg.request.sessionMap["username"]
myuser = database.Users.byUsername(username)
sessionid = cpg.request.sessionMap["_sessionId"]
#p1data = create_user_dropdown_list("player1",username)
#p2data = create_user_dropdown_list("player2")
settings = {}
settings["Data.Message"] = message
userlist = database.get_users_with_free_game_slots()
i = 0
for item in userlist:
settings["Data.Userlist.%d" % i] = item
i += 1
settings["Data.Username"] = username
return helper.cs_render("templates/gamecreation.cs",settings)
def process_creation_form(self,player1,player2,gobansize,description=None):
"""
validates and processes the game creation form.
If everything was ok, a game will be created.
TODO: change this function, so that the original database state canbe
restored, if for example one of the users does not have a free game slot.
"""
username = cpg.request.sessionMap["username"]
myuser = database.Users.byUsername(username)
sessionid = cpg.request.sessionMap["_sessionId"]
#check if at least one of the players is the current user
if (player1 == username) or (player2 == username):
#create game
mygame = database.GobanTable(player1=player1,player2=player2,size=gobansize,description = description)
gamename = mygame.id
#update entries for player one and player two
for player in [player1,player2]:
myplayer = database.Users.byUsername(player)
if myplayer.free_slot_left:
myplayer.add_game(gamename)
else:#should not happen: no free game slot.
#display form with error msg
return self.display_game_creation_form("Error: No free game slots for player %s!<br>" % player)
httptools.redirect("/overview")
else:#display form with error msg
return self.display_game_creation_form("Sorry, but you must be one of the players!<br>")
index.exposed = True