#!/usr/bin/python
+# vim:ts=4
-import sys, os, string, socket, time
-from popen2 import popen2
-from pyPgSQL import PgSQL
+import sys, os, string, time, re, pwd
+import pg
from LATClient import LATClient
+from VendingMachine import VendingMachine
-asynchronous_responses = [ '400', '401', # door open/closed
- '610', # switches changed
- ]
-
-class VendingMachine:
- def __init__(self, rfh, wfh):
- self.rfh = rfh
- self.wfh = wfh
- self.wfh.write('\n')
- self.await_prompt()
-
- def await_prompt(self):
- self.wfh.flush()
- state = 0
- s = ''
- while state != 3:
- s = self.rfh.read(1)
- if s == '': raise Exception
- if s == '\n' and state == 0: state = 1
- if (s == '#' or s == '%') and state == 1: state = 2
- if s == ' ' and state == 2: state = 3
-
- def get_response(self):
- self.wfh.flush()
- s = ''
- while s == '':
- s = self.rfh.readline()
- if s == '': return None
- s = s.strip('\r\n')
- return (s[0:3], s[4:])
-
- def ping(self):
- self.wfh.write('PING\n')
- (code, string) = self.get_response()
- return code == '000'
+GREETING = 'UCC SNACKS'
+PIN_LENGTH = 4
+DOOR = 1
+SWITCH = 2
+KEY = 3
+
+class DispenseDatabase:
+ def __init__(self, vending_machine):
+ self.vending_machine = vending_machine
+ self.db = pg.DB(dbname = 'dispense', host = 'dispense.ucc.gu.uwa.edu.au', user = 'vendserver', passwd = 'revresdnev')
+ self.db.query('LISTEN vend_requests')
+
+ def process_requests(self):
+ print 'processing'
+ query = 'SELECT request_id, request_slot FROM vend_requests WHERE request_handled = false'
+ try:
+ outstanding = self.db.query(query).getresult()
+ except (pg.error,), db_err:
+ sys.stderr.write('Failed to query database: %s\n'%(db_err.strip()))
+ return
+ for (id, slot) in outstanding:
+ (worked, code, string) = self.vending_machine.vend(slot)
+ print (worked, code, string)
+ if worked:
+ query = 'SELECT vend_success(%s)'%id
+ self.db.query(query).getresult()
+ else:
+ query = 'SELECT vend_failed(%s)'%id
+ self.db.query(query).getresult()
+
+ def handle_events(self):
+ notifier = self.db.getnotify()
+ while notifier is not None:
+ self.process_requests()
+ notify = self.db.getnotify()
+
+def get_pin(uid):
+ try:
+ info = pwd.getpwuid(uid)
+ except KeyError:
+ return None
+ if info.pw_dir == None: return False
+ pinfile = os.path.join(info.pw_dir, '.pin')
+ try:
+ s = os.stat(pinfile)
+ except OSError:
+ return None
+ if s.st_mode & 077:
+ return None
+ try:
+ f = file(pinfile)
+ except IOError:
+ return None
+ pinstr = f.readline()
+ f.close()
+ if not re.search('^'+'[0-9]'*PIN_LENGTH+'$', pinstr):
+ return None
+ return int(pinstr)
+
+def has_good_pin(uid):
+ return get_pin(uid) != None
+
+def verify_user_pin(uid, pin):
+ if get_pin(uid) == pin:
+ info = pwd.getpwuid(uid)
+ return info.pw_name
+ else:
+ return None
+
+def door_open_mode(vending_machine):
+ print "Entering open door mode"
+ v.display("DOOR OPEN")
+ while True:
+ v.wait_for_events(1)
+ while True:
+ e = v.next_event()
+ if e == None: break
+ (event, params) = e
+ if event == DOOR:
+ if params == 1: # door closed
+ v.display("BYE BYE!")
+ time.sleep(1)
+ return
if __name__ == '__main__':
# Open vending machine via LAT
latclient = LATClient(service = 'VEND', password = 'dmscptd')
(rfh, wfh) = latclient.get_fh()
v = VendingMachine(rfh, wfh)
- print v.ping()
+ print 'PING is', v.ping()
+ #print 'BEEP is', v.beep()
+ #print 'VEND 11 is', v.vend('11')
+ #print 'SILENCE is', v.silence()
+ #print 'DISPLAY is', v.display('WELCOME')
+ print 'S is', v.get_switches()
+
+ db = DispenseDatabase(v)
+ db.process_requests()
+ cur_user = ''
+ cur_pin = ''
+ cur_selection = ''
+
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ timeout = None
+ last_tick = time.time()
+
+ while True:
+ if time.time() > last_tick+1:
+ if timeout != None and timeout > 0: timeout -= 1
+ if len(scrolling_message) > 0:
+ need_repaint = True
+ if need_repaint and len(scrolling_message) > 0:
+ v.display(scrolling_message[0])
+ if scrolling_wraps:
+ scrolling_message.append(scrolling_message[0])
+ del scrolling_message[0]
+ need_repaint = False
+ if timeout == 0:
+ timeout = None
+ cur_user = ''
+ cur_pin = ''
+ cur_selection = ''
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ continue
+
+ v.wait_for_events(1)
+ while True:
+ e = v.next_event()
+ if e == None: break
+ (event, params) = e
+ print e
+ if event == DOOR:
+ if params == 0:
+ door_open_mode(v);
+ cur_user = ''
+ cur_pin = ''
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ elif event == SWITCH:
+ # don't care right now.
+ pass
+ elif event == KEY:
+ key = params
+ # complicated key handling here:
+ if len(cur_user) < 5:
+ if key == 11:
+ cur_user = ''
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ continue
+ cur_user += chr(key + ord('0'))
+ scrolling_message = []
+ v.display('UID: '+cur_user)
+ if len(cur_user) == 5:
+ uid = int(cur_user)
+ if not has_good_pin(uid):
+ scrolling_message = [' INVALID ', ' PIN', ' `SETUP', GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ cur_user = ''
+ cur_pin = ''
+ continue
+ cur_pin = ''
+ v.display('PIN: ')
+ scrolling_message = []
+ continue
+ elif len(cur_pin) < PIN_LENGTH:
+ if key == 11:
+ if cur_pin == '':
+ cur_user = ''
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ continue
+ cur_pin = ''
+ v.display('PIN: ')
+ scrolling_message = []
+ continue
+ cur_pin += chr(key + ord('0'))
+ v.display('PIN: '+'X'*len(cur_pin))
+ scrolling_message = []
+ if len(cur_pin) == PIN_LENGTH:
+ username = verify_user_pin(int(cur_user), int(cur_pin))
+ if username:
+ v.beep(0, False)
+ cur_selection = ''
+
+ scrolling_message = [' WELCOME ', username]
+ scrolling_message.append('OR A SNACK')
+ scrolling_wraps = True
+ need_repaint = True
+ continue
+ else:
+ v.beep(40, False)
+ scrolling_message = [' BAD PIN ', ' SORRY ', GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+
+ cur_user = ''
+ cur_pin = ''
+ continue
+ elif len(cur_selection) == 0:
+ if key == 11:
+ cur_pin = ''
+ cur_user = ''
+ cur_selection = ''
+ v.display('BYE!')
+ time.sleep(0.5)
+ scrolling_message = [GREETING]
+ scrolling_wraps = False
+ need_repaint = True
+ continue
+ cur_selection += chr(key + ord('0'))
+ scrolling_message = []
+ v.display('SELECT: '+cur_selection)
+ elif len(cur_selection) == 1:
+ if key == 11:
+ cur_selection = ''
+ scrolling_message = []
+ v.display('SELECT: ')
+ continue
+ else:
+ cur_selection += chr(key + ord('0'))
+ #make_selection(cur_selection)
+ # XXX this should move somewhere else:
+ if cur_selection == '55':
+ v.display('GOT DOOR?')
+ os.system('su - "%s" -c "dispense door"'%username)
+ elif cur_selection[1] == '8':
+ v.display('GOT COKE?')
+ os.system('su - "%s" -c "dispense %s"'%(username, cur_selection[0]))
+ else:
+ v.display('HERES A '+cur_selection)
+ v.vend(cur_selection)
+ time.sleep(0.5)
+ v.display('THANK YOU')
+ time.sleep(0.5)
+ cur_selection = ''
+ scrolling_message = [
+ 'LOGOUT: 5',
+ 'LOGOUT: 4',
+ 'LOGOUT: 3',
+ 'LOGOUT: 2',
+ 'LOGOUT: 1',
+ 'BYE BYE!']
+ timeout = 7
+ scrolling_wraps = True
+ need_repaint = True
+
+ v.wait_for_events(0)
+
+ db.handle_events()
git.ucc.asn.au / uccvend-vendserver.git / blobdiff
UCC git Repository :: git.ucc.asn.au