some more code for the creation of new games through the user

documentation/development/README_DEVEL

@@ -49,3 +49,6 @@ How to extract the data from this POST with the cgi module:
 		print string.split(form.keys()[0],".x")[0]
 
 ------------------------------------------
+known bugs:
+"DatabaseError: error 'ERROR:  current transaction is aborted, commands ignored until end of transaction block"
+seems to be a problem with mod_python and a cached database connection. /etc/init.d/apache2 restart helps.

gamecreation.py

@@ -0,0 +1,90 @@
+from mod_python import *
+import psql,helper
+
+def display_game_creation_form(req,sessionid,username):
+	"""
+	prints a html form with multiple drop-down lists for choosing players,
+	goban size and so on.
+	gets a mod_python request, prints to req.write.
+	"""
+	data = helper.header()
+	p1data = create_user_dropdown_list("playerone",username)
+	p2data = create_user_dropdown_list("playertwo")
+	gobansize = create_goban_size_dropdown_list("gobansize")
+	#start form
+	#choose player one (black)
+	#choose player two (white)
+	#choose goban size
+	#'hidden' session id and username
+	data += """
+	<form  method="post">
+	<p>Player One (Black): %s </p>
+	<p>Player Two (White): %s </p>
+	<p>Goban Size: %s fields </p>
+	<input type="hidden" name="sessionid" value="%s"><p>
+	<input type="hidden" name="username" value="%s"><p>
+	<input type="submit" value="create game"></p>
+	</form>
+	""" % (p1data,p2data,gobansize,sessionid,username)
+
+
+	
+	data+=helper.footer()
+	req.write(data)
+
+def process_creation_form(req):
+	"""
+	validates and processes the game creation form. 
+	If everything was ok, a game will be created.
+	"""
+	#check if at least one of the players is the current user
+	#create game name
+	#create_game
+	#update entries for player one and player two
+	pass
+
+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 = psql.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
+
+def create_goban_size_dropdown_list(listname):
+	"""
+	gets a name, returns a string with a html form for selecting the goban size.
+	"""
+	data = """
+	<select name="%s">
+	<option> 9 </option>
+	<option> 13 </option>
+	<option> 19 </option>
+	</select>
+	""" % listname
+	return data
+
+def main(req,form):
+	"""
+	display and process forms for game creation.
+	gets a request object and a util.FieldStorage form.
+	returns nothing.
+	"""
+	username 	= form["username"]
+	#TODO:check if valid session id
+	sessionid 	= form["sessionid"] 
+	if "create" in form.keys():	#first call of this function
+		display_game_creation_form(req,sessionid,username)
+	else:
+		process_creation_form(req)
+	form = util.FieldStorage(req)
+	req.write(str(form))

helper.py

@@ -1,3 +1,5 @@
+import string
+
 def header():
 	"""return html header"""
 	data = 	"""

login.py

@@ -1,4 +1,4 @@
-import psql,init_webgo,helper
+import psql,init_webgo,helper,gamecreation
 import time
 from mod_python import *
 
@@ -19,8 +19,6 @@ def process_form(req,form):
 			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
-				req.write("hier bin ich in der Schleife.<br>")
-				req.write(str(origpassword)+"<br>")
 				if password == origpassword:
 					#login accepted
 					psql.set_user_sessionid(name,sessionid)
@@ -107,15 +105,10 @@ def login_form():
 	data += helper.footer()
 
 
+
 	return data
 
 
-def create_new_game(req,user):
-	"""
-	create a new game for user.
-	gets: request object, username.
-	"""
-	
 
 
 def main(req):
@@ -125,6 +118,6 @@ def main(req):
 		req.write(login_form())
 	elif ("create" in form.keys()) and ("username" in form.keys()):
 		#user wants to create a new game
-		create_new_game(req,form["username"])
+		gamecreation.main(req,form)
 	else:
 		process_form(req,form)

main.py

@@ -18,7 +18,7 @@ def handler(req):
 	req.content_type =  "text/html"
 	try:               # use explicit exception handling
 		#reinitialize database
-		init_webgo.main()
+		#init_webgo.main()
 
 		login = apache.import_module("login")
 		login.main(req)

psql.py

@@ -270,6 +270,23 @@ def fetchall_list_to_goban_dict(list):
 	return ret
 
 
+def get_users_with_free_game_slots():
+	"""
+	gets nothing.
+	returns a list of all users who have at least one game slot free.
+	"""
+	cursor=db.cursor()
+	data = """select username from users where 
+	(game1 IS NULL) OR (game2 IS NULL) OR (game3 IS NULL) OR 
+	(game4 IS NULL) OR (game5 IS NULL) OR (game6 IS NULL) OR 
+	(game7 IS NULL) OR (game8 IS NULL) OR (game9 IS NULL) OR 
+	(game10 IS NULL)"""
+	cursor.execute(data)
+	# Commit the changes 	
+	db.commit()
+	tmplist = cursor.fetchall()
+	ret = [item[0] for item in tmplist]
+	return ret	
 		
 def test():
 	#create_table("test")