Lab notes for Fri, Mar 13. 

So from yesterday we have One.py, Two.py, Store.py and main. Also Data.py

The code is listed at: http://www.cs.indiana.edu/classes/a348/spr2009/0312.txt

We create a Three.py: 

-bash-3.2$ cat Three.py
def show():
  print """
<form>
This is screen Three. <p> 
<input type="submit" name="store" value="Store Combination"> 
<input type="hidden" name="source" value="Three"> 
</form> 
"""
-bash-3.2$ 

And main needs to be updated: 

-bash-3.2$ cat main
#!/usr/bin/python

import One, Data, Two, Store, Three # note Three

print "Content-type: text/html\n\n"; 

if Data.source == "One": 
  if Data.roll: 
    Two.show()
  else: 
    Store.show()
elif Data.source == "Two":  # added lines 
  if Data.roll:             #
    Three.show()            #
  else:                     #
    Store.show()            #
else: 
  One.show()


-bash-3.2$ 

If we include all the transitions and screens we have: 

-bash-3.2$ cat main
#!/usr/bin/python

import One, Data, Two, Store, Three

print "Content-type: text/html\n\n"; 

if Data.source == "One": 
  if Data.roll: 
    Two.show()
  else: 
    Store.show()
elif Data.source == "Two": 
  if Data.roll: 
    Three.show()
  else: 
    Store.show()
elif Data.source == "Three":
  Store.show()
else: # happens when source is "Store" or isn't at all 
  One.show()


-bash-3.2$ 

Now we need to choose the next step.

We're done with the basic transition layout: 

http://www.cs.indiana.edu/classes/a348/spr2009/diagram.jpg

And I choose to implement the maintenance of the history table. 

#-------------------------------------------------------------------------

#!/usr/bin/python

import One, Data, Two, Store, Three

print "Content-type: text/html\n\n"; 

if Data.source == "One": 
  if Data.roll: 
    Two.show()
  else: 
    Store.show()
elif Data.source == "Two": 
  if Data.roll: 
    Three.show()
  else: 
    Store.show()
elif Data.source == "Three":
  Store.show()
elif Data.source == "Store": 
  Store.finalize()
  One.show()
else: # happens when source is wrong or doesn't exist at all 
  One.show()

#-------------------------------------------------------------------------

import Data

def show():
  print """
<form>
This is screen One. <p> 
<input type="submit" name="roll"  value="Roll Again!"> 
<input type="submit" name="store" value="Store Combination"> 
<input type="hidden" name="source" value="One"> 
<input type="hidden" name="history" value="%s"> 
</form> 
""" % Data.history

#-------------------------------------------------------------------------

import Data

def show():
  print """
<form>
This is screen Two. <p> 
<input type="submit" name="roll"  value="Roll Again!"> 
<input type="submit" name="store" value="Store Combination"> 
<input type="hidden" name="source" value="Two"> 
<input type="hidden" name="history" value="%s"> 
</form> 
""" % Data.history

#-------------------------------------------------------------------------

import Data

def show():
  print """
<form>
This is screen Three. <p> 
<input type="submit" name="store" value="Store Combination"> 
<input type="hidden" name="source" value="Three"> 
<input type="hidden" name="history" value="%s">
</form> 
""" % Data.history

#-------------------------------------------------------------------------

import Data

def show():
  print """
<form>
Store your combination as: <select name=choice> %s </select> <p> 
Click <input type=submit value="Roll Dice"> to start new game. 
<input type="hidden" name="source" value="Store"> 
<input type="hidden" name="history" value="%s"> 
</form> 
""" % (Data.selection(), Data.history) 

def finalize():
  combination = "" # we ignore it for now 
  Data.history += Data.choice + ":" + combination + ","  
  
#-------------------------------------------------------------------------

import cgi

q = cgi.FieldStorage()

(source, roll, history, choice) = ("", "", "", "")
if (q.has_key("source")):  source  = q["source"].value
if (q.has_key("roll")):    roll    = q["roll"].value
if (q.has_key("history")): history = q["history"].value
if (q.has_key("choice")):  choice  = q["choice"].value

def selection():
  entries = ("ones", "twos", "threes", "fives", "chance", "yahtzee")
  result = ""
  for entry in entries:
    temp = entry + ":"
    if temp in history:
      pass
    else:
      result += "<option>" + entry
  return result    

#-------------------------------------------------------------------------