VendServer/VendServer.py

   1 #!/usr/bin/python
   2 # vim:ts=4
   3
   4 USE_MIFARE = 1
   5
   6 import ConfigParser
   7 import sys, os, string, re, pwd, signal, math, syslog
   8 import logging, logging.handlers
   9 from traceback import format_tb
  10 from time import time, sleep, mktime, localtime
  11 from subprocess import Popen, PIPE
  12 from LATClient import LATClient, LATClientException
  13 from SerialClient import SerialClient, SerialClientException
  14 from VendingMachine import VendingMachine, VendingException
  15 from MessageKeeper import MessageKeeper
  16 from HorizScroll import HorizScroll
  17 from random import random, seed
  18 from Idler import GreetingIdler,TrainIdler,GrayIdler,StringIdler,ClockIdler,FortuneIdler,FileIdler,PipeIdler
  19 from SnackConfig import get_snack#, get_snacks
  20 import socket
  21 from posix import geteuid
  22 from OpenDispense import OpenDispense as Dispense
  23
  24 CREDITS="""
  25 This vending machine software brought to you by:
  26 Bernard Blackham
  27 Mark Tearle
  28 Nick Bannon
  29 Cameron Patrick
  30 and a collective of hungry alpacas.
  31
  32 The MIFARE card reader bought to you by:
  33 David Adam
  34
  35 Bug Hunting and hardware maintenance by:
  36 Mitchell Pomery
  37
  38 For a good time call +61 8 6488 3901
  39
  40
  41
  42 """
  43
  44 PIN_LENGTH = 4
  45
  46 DOOR = 1
  47 SWITCH = 2
  48 KEY = 3
  49 TICK = 4
  50 MIFARE = 5
  51
  52
  53 (
  54 STATE_IDLE,
  55 STATE_DOOR_OPENING,
  56 STATE_DOOR_CLOSING,
  57 STATE_GETTING_UID,
  58 STATE_GETTING_PIN,
  59 STATE_GET_SELECTION,
  60 STATE_GRANDFATHER_CLOCK,
  61 ) = range(1,8)
  62
  63 TEXT_SPEED = 0.8
  64 IDLE_SPEED = 0.05
  65
  66
  67 config_options = {
  68         'DBServer': ('Database', 'Server'),
  69         'DBName': ('Database', 'Name'),
  70         'DBUser': ('VendingMachine', 'DBUser'),
  71         'DBPassword': ('VendingMachine', 'DBPassword'),
  72
  73         'ServiceName': ('VendingMachine', 'ServiceName'),
  74         'ServicePassword': ('VendingMachine', 'Password'),
  75
  76         'ServerName': ('DecServer', 'Name'),
  77         'ConnectPassword': ('DecServer', 'ConnectPassword'),
  78         'PrivPassword': ('DecServer', 'PrivPassword'),
  79         }
  80
  81 class VendConfigFile:
  82         def __init__(self, config_file, options):
  83                 try:
  84                         cp = ConfigParser.ConfigParser()
  85                         cp.read(config_file)
  86
  87                         for option in options:
  88                                 section, name = options[option]
  89                                 value = cp.get(section, name)
  90                                 self.__dict__[option] = value
  91
  92                 except ConfigParser.Error, e:
  93                         raise SystemExit("Error reading config file "+config_file+": " + str(e))
  94
  95 """
  96 This class manages the current state of the vending machine.
  97 """
  98 class VendState:
  99         def __init__(self,v):
 100                 self.state_table = {}
 101                 self.state = STATE_IDLE
 102                 self.counter = 0
 103
 104                 self.mk = MessageKeeper(v)
 105                 self.cur_user = ''
 106                 self.cur_pin = ''
 107                 self.username = ''
 108                 self.cur_selection = ''
 109                 self.time_to_autologout = None
 110
 111                 self.last_timeout_refresh = None
 112
 113         def change_state(self,newstate,newcounter=None):
 114                 if self.state != newstate:
 115                         self.state = newstate
 116
 117                 if newcounter is not None and self.counter != newcounter:
 118                         self.counter = newcounter
 119
 120 class VendServer():
 121
 122         v = None
 123         vstatus = None
 124         state = None
 125         event = None
 126         idlers = []
 127         idler = None
 128
 129         _pin_uid = 0
 130         _pin_uname = 'root'
 131         _pin_pin = '----'
 132         _last_card_id = -1
 133
 134         dispense = None
 135
 136         """
 137         Show information to the user as to what can be dispensed.
 138         """
 139         def scroll_options(self, username, mk, welcome = False):
 140                 # If the user has just logged in, show them their balance
 141                 if welcome:
 142                         balance = self.dispense.getBalance()
 143                         balance = balance[:-4] + '.' + balance[-4] + balance[-2:]   # Work around display bug
 144
 145                         msg = [(self.center('WELCOME'), False, TEXT_SPEED),
 146                                    (self.center(self.dispense.getUsername()), False, TEXT_SPEED),
 147                                    (self.center(balance), False, TEXT_SPEED),]
 148                 else:
 149                         msg = []
 150                 choices = ' '*10+'CHOICES: '
 151
 152                 # Show what is in the coke machine
 153                 # Need to update this so it uses the abstracted system
 154                 cokes = []
 155                 for i in ['08', '18', '28', '38', '48', '58', '68']:
 156                         cokes.append((i, self.dispense.getItemInfo(i)))
 157
 158                 for c in cokes:
 159                         if c[1][0] == 'dead':
 160                                 continue
 161                         choices += '%s-(%sc)-%s8 '%(c[1][0], c[1][1], c[0])
 162
 163                 # Show the final few options
 164                 choices += '55-DOOR '
 165                 choices += 'OR ANOTHER SNACK. '
 166                 choices += '99 TO READ AGAIN. '
 167                 choices += 'CHOICE?   '
 168                 msg.append((choices, False, None))
 169                 # Send it to the display
 170                 mk.set_messages(msg)
 171
 172         """
 173         In here just for fun.
 174         """
 175         def cookie(self):
 176                 seed(time())
 177                 messages = ['  WASSUP! ', 'PINK FISH ', ' SECRETS ', '  ESKIMO  ', ' FORTUNES ', 'MORE MONEY']
 178                 choice = int(random()*len(messages))
 179                 msg = messages[choice]
 180                 left = range(len(msg))
 181                 for i in range(len(msg)):
 182                         if msg[i] == ' ': left.remove(i)
 183                 reveal = 1
 184                 while left:
 185                         s = ''
 186                         for i in range(0, len(msg)):
 187                                 if i in left:
 188                                         if reveal == 0:
 189                                                 left.remove(i)
 190                                                 s += msg[i]
 191                                         else:
 192                                                 s += chr(int(random()*26)+ord('A'))
 193                                         reveal += 1
 194                                         reveal %= 17
 195                                 else:
 196                                         s += msg[i]
 197                         self.v.display(s)
 198
 199         """
 200         Format text so it will appear centered on the screen.
 201         """
 202         def center(self, str):
 203                 LEN = 10
 204                 return ' '*((LEN-len(str))/2)+str
 205
 206         """
 207         Configure the things that will appear on screen whil the machine is idling.
 208         """
 209         def setup_idlers(self):
 210                 self.idlers = [
 211                         #
 212                         GrayIdler(self.v),
 213                         GrayIdler(self.v,one="*",zero="-"),
 214                         GrayIdler(self.v,one="/",zero="\\"),
 215                         GrayIdler(self.v,one="X",zero="O"),
 216                         GrayIdler(self.v,one="*",zero="-",reorder=1),
 217                         GrayIdler(self.v,one="/",zero="\\",reorder=1),
 218                         GrayIdler(self.v,one="X",zero="O",reorder=1),
 219                         #
 220                         ClockIdler(self.v),
 221                         ClockIdler(self.v),
 222                         ClockIdler(self.v),
 223                         #
 224                         StringIdler(self.v), # Hello Cruel World
 225                         StringIdler(self.v, text="Kill 'em all", repeat=False),
 226                         StringIdler(self.v, text=CREDITS),
 227                         StringIdler(self.v, text=str(math.pi) + "            "),
 228                         StringIdler(self.v, text=str(math.e) + "            "),
 229                         StringIdler(self.v, text="    I want some pizza - please call Broadway Pizza on +61 8 9389 8500 - and order as Quinn - I am getting really hungry", repeat=False),
 230                         # "Hello World" in brainfuck
 231                         StringIdler(self.v, text=">+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]>++++++++[<++++>-] <.>+++++++++++[<++++++++>-]<-.--------.+++.------.--------.[-]>++++++++[<++++>- ]<+.[-]++++++++++."),
 232                         #
 233                         TrainIdler(self.v),
 234                         #
 235                         FileIdler(self.v, '/usr/share/common-licenses/GPL-2',affinity=2),
 236                         #
 237                         PipeIdler(self.v, "/usr/bin/getent", "passwd"),
 238                         FortuneIdler(self.v,affinity=20),
 239                         ]
 240                 disabled = [
 241                         ]
 242
 243         """
 244         Go back to the default idler.
 245         """
 246         def reset_idler(self, t = None):
 247                 self.idler = GreetingIdler(self.v, t)
 248                 self.vstatus.time_of_next_idlestep = time()+self.idler.next()
 249                 self.vstatus.time_of_next_idler = None
 250                 self.vstatus.time_to_autologout = None
 251                 self.vstatus.change_state(STATE_IDLE, 1)
 252
 253         """
 254         Change to a random idler.
 255         """
 256         def choose_idler(self):
 257
 258                 # Implementation of the King Of the Hill algorithm from;
 259                 # http://eli.thegreenplace.net/2010/01/22/weighted-random-generation-in-python/
 260
 261                 #def weighted_choice_king(weights):
 262                 #       total = 0
 263                 #       winner = 0
 264                 #       for i, w in enumerate(weights):
 265                 #               total += w
 266                 #               if random.random() * total < w:
 267                 #                       winner = i
 268                 #       return winner
 269                 #
 270
 271                 total = 0
 272                 winner = None
 273
 274                 for choice in self.idlers:
 275                         weight = choice.affinity()
 276                         total += weight
 277                         if random() * total < weight:
 278                                 winner = choice
 279
 280                 self.idler = winner
 281
 282                 if self.idler:
 283                         self.idler.reset()
 284         """
 285         Run every step while the machine is idling.
 286         """
 287         def idle_step(self):
 288                 if self.idler.finished():
 289                         self.choose_idler()
 290                         self.vstatus.time_of_next_idler = time() + 30
 291                 nextidle = self.idler.next()
 292                 if nextidle is None:
 293                         nextidle = IDLE_SPEED
 294                 self.vstatus.time_of_next_idlestep = time()+nextidle
 295
 296         """
 297         These next two events trigger no response in the code.
 298         """
 299         def handle_tick_event(self, event, params):
 300                 # don't care right now.
 301                 pass
 302
 303         def handle_switch_event(self, event, params):
 304                 # don't care right now.
 305                 pass
 306
 307         """
 308         Don't do anything for this event.
 309         """
 310         def do_nothing(self, event, params):
 311                 print "doing nothing (s,e,p)", state, " ", event, " ", params
 312                 pass
 313
 314         """
 315         These next few entrie tell us to do nothing while we are idling
 316         """
 317         def handle_getting_uid_idle(self, event, params):
 318                 # don't care right now.
 319                 pass
 320
 321         def handle_getting_pin_idle(self, event, params):
 322                 # don't care right now.
 323                 pass
 324
 325         """
 326         While logged in and waiting for user input, slowly get closer to logging out.
 327         """
 328         def handle_get_selection_idle(self, event, params):
 329                 # don't care right now.
 330                 ###
 331                 ### State logging out ..
 332                 if self.vstatus.time_to_autologout != None:
 333                         time_left = self.vstatus.time_to_autologout - time()
 334                         if time_left < 6 and (self.vstatus.last_timeout_refresh is None or self.vstatus.last_timeout_refresh > time_left):
 335                                 self.vstatus.mk.set_message('LOGOUT: '+str(int(time_left)))
 336                                 self.vstatus.last_timeout_refresh = int(time_left)
 337                                 self.vstatus.cur_selection = ''
 338
 339                 if self.vstatus.time_to_autologout != None and self.vstatus.time_to_autologout - time() <= 0:
 340                         self.vstatus.time_to_autologout = None
 341                         self.vstatus.cur_user = ''
 342                         self.vstatus.cur_pin = ''
 343                         self.vstatus.cur_selection = ''
 344                         self._last_card_id = -1
 345                         self.reset_idler()
 346
 347                 ### State fully logged out ... reset variables
 348                 if self.vstatus.time_to_autologout and not self.vstatus.mk.done():
 349                         self.vstatus.time_to_autologout = None
 350                 if self.vstatus.cur_user == '' and self.vstatus.time_to_autologout:
 351                         self.vstatus.time_to_autologout = None
 352
 353                 ### State logged in
 354                 if len(self.vstatus.cur_pin) == PIN_LENGTH and self.vstatus.mk.done() and self.vstatus.time_to_autologout == None:
 355                         # start autologout
 356                         self.vstatus.time_to_autologout = time() + 15
 357                         self.vstatus.last_timeout_refresh = None
 358
 359                 ## FIXME - this may need to be elsewhere.....
 360                 # need to check
 361                 self.vstatus.mk.update_display()
 362
 363         """
 364         Triggered on user input while logged in.
 365         """
 366         def handle_get_selection_key(self, event, params):
 367                 key = params
 368                 if len(self.vstatus.cur_selection) == 0:
 369                         if key == 11:
 370                                 self.vstatus.cur_pin = ''
 371                                 self.vstatus.cur_user = ''
 372                                 self.vstatus.cur_selection = ''
 373                                 _last_card_id = -1
 374                                 self.vstatus.mk.set_messages([(self.center('BYE!'), False, 1.5)])
 375                                 self.reset_idler(2)
 376                                 return
 377                         self.vstatus.cur_selection += chr(key + ord('0'))
 378                         self.vstatus.mk.set_message('SELECT: '+self.vstatus.cur_selection)
 379                         self.vstatus.time_to_autologout = None
 380                 elif len(self.vstatus.cur_selection) == 1:
 381                         if key == 11:
 382                                 self.vstatus.cur_selection = ''
 383                                 self.vstatus.time_to_autologout = None
 384                                 self.scroll_options(self.vstatus.username, self.vstatus.mk)
 385                                 return
 386                         else:
 387                                 self.vstatus.cur_selection += chr(key + ord('0'))
 388                                 if self.vstatus.cur_user:
 389                                         self.make_selection()
 390                                         self.vstatus.cur_selection = ''
 391                                         self.vstatus.time_to_autologout = time() + 8
 392                                         self.vstatus.last_timeout_refresh = None
 393                                 else:
 394                                         # Price check mode.
 395                                         (name,price) = self.dispense.getItemInfo(self.vstatus.cur_selection)
 396                                         dollarprice = "$%.2f" % ( price / 100.0 )
 397                                         dollarprice = dollarprice[:-4] + '.' + dollarprice[-4] + dollarprice[-2:]   # Work around display bug
 398                                         self.v.display( self.vstatus.cur_selection+' - %s'%dollarprice)
 399
 400                                         self.vstatus.cur_selection = ''
 401                                         self.vstatus.time_to_autologout = None
 402                                         self.vstatus.last_timeout_refresh = None
 403
 404         """
 405         Triggered when the user has entered the id of something they would like to purchase.
 406         """
 407         def make_selection(self):
 408                 # should use sudo here
 409                 if self.vstatus.cur_selection == '55':
 410                         self.vstatus.mk.set_message('OPENSESAME')
 411                         logging.info('dispensing a door for %s'%self.vstatus.username)
 412                         if geteuid() == 0:
 413                                 ret = os.system('dispense -u "%s" door'%self.vstatus.username)
 414                         else:
 415                                 ret = os.system('dispense door')
 416                         if ret == 0:
 417                                 logging.info('door opened')
 418                                 self.vstatus.mk.set_message(self.center('DOOR OPEN'))
 419                         else:
 420                                 logging.warning('user %s tried to dispense a bad door'%self.vstatus.username)
 421                                 self.vstatus.mk.set_message(self.center('BAD DOOR'))
 422                         sleep(1)
 423                 elif self.vstatus.cur_selection == '81':
 424                         self.cookie()
 425                 elif self.vstatus.cur_selection == '99':
 426                         self.scroll_options(self.vstatus.username, self.vstatus.mk)
 427                         self.vstatus.cur_selection = ''
 428                         return
 429                 elif self.vstatus.cur_selection[1] == '8':
 430                         self.v.display('GOT DRINK?')
 431                         if ((os.system('dispense -u "%s" coke:%s'%(self.vstatus.username, self.vstatus.cur_selection[0])) >> 8) != 0):
 432                                 self.v.display('SEEMS NOT')
 433                         else:
 434                                 self.v.display('GOT DRINK!')
 435                 else:
 436                         # first see if it's a named slot
 437                         try:
 438                                 price, shortname, name = get_snack( self.vstatus.cur_selection )
 439                         except:
 440                                 price, shortname, name = get_snack( '--' )
 441                         dollarprice = "$%.2f" % ( price / 100.0 )
 442                         self.v.display(self.vstatus.cur_selection+' - %s'%dollarprice)
 443                         exitcode = os.system('dispense -u "%s" snack:%s'%(self.vstatus.username, self.vstatus.cur_selection)) >> 8
 444                         if (exitcode == 0):
 445                                 # magic dispense syslog service
 446                                 syslog.syslog(syslog.LOG_INFO | syslog.LOG_LOCAL4, "vended %s (slot %s) for %s" % (name, self.vstatus.cur_selection, self.vstatus.username))
 447                                 (worked, code, string) = self.v.vend(self.vstatus.cur_selection)
 448                                 if worked:
 449                                         self.v.display('THANK YOU')
 450                                 else:
 451                                         print "Vend Failed:", code, string
 452                                         self.v.display('VEND FAIL')
 453                         elif (exitcode == 5):   # RV_BALANCE
 454                                 self.v.display('NO MONEY?')
 455                         elif (exitcode == 4):   # RV_ARGUMENTS (zero give causes arguments)
 456                                 self.v.display('EMPTY SLOT')
 457                         elif (exitcode == 1):   # RV_BADITEM (Dead slot)
 458                                 self.v.display('EMPTY SLOT')
 459                         else:
 460                                 syslog.syslog(syslog.LOG_INFO | syslog.LOG_LOCAL4, "failed vending %s (slot %s) for %s (code %d)" % (name, self.vstatus.cur_selection, self.vstatus.username, exitcode))
 461                                 self.v.display('UNK ERROR')
 462                 sleep(1)
 463
 464         """
 465         Triggered when the user presses a button while entering their pin.
 466         """
 467         def handle_getting_pin_key(self, event, params):
 468                 key = params
 469                 if len(self.vstatus.cur_pin) < PIN_LENGTH:
 470                         if key == 11:
 471                                 if self.vstatus.cur_pin == '':
 472                                         self.vstatus.cur_user = ''
 473                                         slef.reset_idler()
 474
 475                                         return
 476                                 self.vstatus.cur_pin = ''
 477                                 self.vstatus.mk.set_message('PIN: ')
 478                                 return
 479                         self.vstatus.cur_pin += chr(key + ord('0'))
 480                         self.vstatus.mk.set_message('PIN: '+'X'*len(self.vstatus.cur_pin))
 481                         if len(self.vstatus.cur_pin) == PIN_LENGTH:
 482                                 self.dispense.authUserIdPin(self.vstatus.cur_user, self.vstatus.cur_pin)
 483                                 if self.dispense.getUsername():
 484                                         self.v.beep(0, False)
 485                                         self.vstatus.cur_selection = ''
 486                                         self.vstatus.change_state(STATE_GET_SELECTION)
 487                                         self.scroll_options(self.vstatus.username, self.vstatus.mk, True)
 488                                         return
 489                                 else:
 490                                         self.v.beep(40, False)
 491                                         self.vstatus.mk.set_messages(
 492                                                 [(self.center('BAD PIN'), False, 1.0),
 493                                                  (self.center('SORRY'), False, 0.5)])
 494                                         self.vstatus.cur_user = ''
 495                                         self.vstatus.cur_pin = ''
 496
 497                                         self.reset_idler(2)
 498
 499                                         return
 500
 501         """
 502         Triggered when the user presses a button while entering their user id.
 503         """
 504         def handle_getting_uid_key(self, event, params):
 505                 key = params
 506                 # complicated key handling here:
 507
 508                 if len(self.vstatus.cur_user) == 0 and key == 9:
 509                         self.vstatus.cur_selection = ''
 510                         self.vstatus.time_to_autologout = None
 511                         self.vstatus.mk.set_message('PRICECHECK')
 512                         sleep(0.5)
 513                         self.scroll_options('', self.vstatus.mk)
 514                         self.vstatus.change_state(STATE_GET_SELECTION)
 515                         return
 516
 517                 if len(self.vstatus.cur_user) <8:
 518                         if key == 11:
 519                                 self.vstatus.cur_user = ''
 520
 521                                 self.reset_idler()
 522                                 return
 523                         self.vstatus.cur_user += chr(key + ord('0'))
 524                         #logging.info('dob: '+vstatus.cur_user)
 525                         if len(self.vstatus.cur_user) > 5:
 526                                 self.vstatus.mk.set_message('>'+self.vstatus.cur_user)
 527                         else:
 528                                 self.vstatus.mk.set_message('UID: '+self.vstatus.cur_user)
 529
 530                 if len(self.vstatus.cur_user) == 5:
 531                         uid = int(self.vstatus.cur_user)
 532
 533                         if uid == 0:
 534                                 logging.info('user '+self.vstatus.cur_user+' has a bad PIN')
 535                                 pfalken="""
 536         CARRIER DETECTED
 537
 538         CONNECT 128000
 539
 540         Welcome to Picklevision Sytems, Sunnyvale, CA
 541
 542         Greetings Professor Falken.
 543
 544
 545
 546
 547         Shall we play a game?
 548
 549
 550         Please choose from the following menu:
 551
 552         1. Tic-Tac-Toe
 553         2. Chess
 554         3. Checkers
 555         4. Backgammon
 556         5. Poker
 557         6. Toxic and Biochemical Warfare
 558         7. Global Thermonuclear War
 559
 560         7 [ENTER]
 561
 562         Wouldn't you prefer a nice game of chess?
 563
 564         """.replace('\n','    ')
 565                                 self.vstatus.mk.set_messages([(pfalken, False, 10)])
 566                                 self.vstatus.cur_user = ''
 567                                 self.vstatus.cur_pin = ''
 568
 569                                 self.reset_idler(10)
 570
 571                                 return
 572
 573                         # TODO Fix this up do we can check before logging in
 574                         """
 575                         if self.dispense.isDisabled():
 576                                 logging.info('user '+self.vstatus.cur_user+' is disabled')
 577                                 self.vstatus.mk.set_messages(
 578                                         [(' '*11+'ACCOUNT DISABLED'+' '*11, False, 3)])
 579                                 self.vstatus.cur_user = ''
 580                                 self.vstatus.cur_pin = ''
 581
 582                                 self.reset_idler(3)
 583                                 return
 584                         """
 585
 586                         self.vstatus.cur_pin = ''
 587                         self.vstatus.mk.set_message('PIN: ')
 588                         logging.info('need pin for user %s'%self.vstatus.cur_user)
 589                         self.vstatus.change_state(STATE_GETTING_PIN)
 590                         return
 591
 592         """
 593         Triggered when a key is pressed and the machine is idling.
 594         """
 595         def handle_idle_key(self, event, params):
 596                 key = params
 597                 if key == 11:
 598                         self.vstatus.cur_user = ''
 599                         self.reset_idler()
 600                         return
 601
 602                 self.vstatus.change_state(STATE_GETTING_UID)
 603                 self.run_handler(event, params)
 604
 605         """
 606         What to do when there is nothing to do.
 607         """
 608         def handle_idle_tick(self, event, params):
 609                 ### State idling
 610                 if self.vstatus.mk.done():
 611                         self.idle_step()
 612
 613                 if self.vstatus.time_of_next_idler and time() > self.vstatus.time_of_next_idler:
 614                         self.vstatus.time_of_next_idler = time() + 30
 615                         self.choose_idler()
 616
 617                 ###
 618
 619                 self.vstatus.mk.update_display()
 620
 621                 self.vstatus.change_state(STATE_GRANDFATHER_CLOCK)
 622                 self.run_handler(event, params)
 623                 sleep(0.05)
 624
 625         """
 626         Manages the beeps for the grandfather clock
 627         """
 628         def beep_on(self, when, before=0):
 629                 start = int(when - before)
 630                 end = int(when)
 631                 now = int(time())
 632
 633                 if now >= start and now <= end:
 634                         return 1
 635                 return 0
 636
 637         def handle_idle_grandfather_tick(self, event, params):
 638                 ### check for interesting times
 639                 now = localtime()
 640
 641                 quarterhour = mktime([now[0],now[1],now[2],now[3],15,0,now[6],now[7],now[8]])
 642                 halfhour = mktime([now[0],now[1],now[2],now[3],30,0,now[6],now[7],now[8]])
 643                 threequarterhour = mktime([now[0],now[1],now[2],now[3],45,0,now[6],now[7],now[8]])
 644                 fivetothehour = mktime([now[0],now[1],now[2],now[3],55,0,now[6],now[7],now[8]])
 645
 646                 hourfromnow = localtime(time() + 3600)
 647
 648                 #onthehour = mktime([now[0],now[1],now[2],now[3],03,0,now[6],now[7],now[8]])
 649                 onthehour = mktime([hourfromnow[0],hourfromnow[1],hourfromnow[2],hourfromnow[3], \
 650                         0,0,hourfromnow[6],hourfromnow[7],hourfromnow[8]])
 651
 652                 ## check for X seconds to the hour
 653                 ## if case, update counter to 2
 654                 if self.beep_on(onthehour,15) \
 655                         or self.beep_on(halfhour,0) \
 656                         or self.beep_on(quarterhour,0) \
 657                         or self.beep_on(threequarterhour,0) \
 658                         or self.beep_on(fivetothehour,0):
 659                         self.vstatus.change_state(STATE_GRANDFATHER_CLOCK,2)
 660                         self.run_handler(event, params)
 661                 else:
 662                         self.vstatus.change_state(STATE_IDLE)
 663
 664         def handle_grandfather_tick(self, event, params):
 665                 go_idle = 1
 666
 667                 msg = []
 668                 ### we live in interesting times
 669                 now = localtime()
 670
 671                 quarterhour = mktime([now[0],now[1],now[2],now[3],15,0,now[6],now[7],now[8]])
 672                 halfhour = mktime([now[0],now[1],now[2],now[3],30,0,now[6],now[7],now[8]])
 673                 threequarterhour = mktime([now[0],now[1],now[2],now[3],45,0,now[6],now[7],now[8]])
 674                 fivetothehour = mktime([now[0],now[1],now[2],now[3],55,0,now[6],now[7],now[8]])
 675
 676                 hourfromnow = localtime(time() + 3600)
 677
 678         #       onthehour = mktime([now[0],now[1],now[2],now[3],03,0,now[6],now[7],now[8]])
 679                 onthehour = mktime([hourfromnow[0],hourfromnow[1],hourfromnow[2],hourfromnow[3], \
 680                         0,0,hourfromnow[6],hourfromnow[7],hourfromnow[8]])
 681
 682
 683                 #print "when it fashionable to wear a onion on your hip"
 684
 685                 if self.beep_on(onthehour,15):
 686                         go_idle = 0
 687                         next_hour=((hourfromnow[3] + 11) % 12) + 1
 688                         if onthehour - time() < next_hour and onthehour - time() > 0:
 689                                 self.v.beep(0, False)
 690
 691                                 t = int(time())
 692                                 if (t % 2) == 0:
 693                                         msg.append(("DING!", False, None))
 694                                 else:
 695                                         msg.append(("     DING!", False, None))
 696                         elif int(onthehour - time()) == 0:
 697                                 self.v.beep(255, False)
 698                                 msg.append(("   BONG!", False, None))
 699                                 msg.append(("     IT'S "+ str(next_hour) + "O'CLOCK AND ALL IS WELL .....", False, TEXT_SPEED*4))
 700                 elif self.beep_on(halfhour,0):
 701                         go_idle = 0
 702                         self.v.beep(0, False)
 703                         msg.append((" HALFHOUR ", False, 50))
 704                 elif self.beep_on(quarterhour,0):
 705                         go_idle = 0
 706                         self.v.beep(0, False)
 707                         msg.append((" QTR HOUR ", False, 50))
 708                 elif self.beep_on(threequarterhour,0):
 709                         go_idle = 0
 710                         self.v.beep(0, False)
 711                         msg.append((" 3 QTR HR ", False, 50))
 712                 elif self.beep_on(fivetothehour,0):
 713                         go_idle = 0
 714                         self.v.beep(0, False)
 715                         msg.append(("Quick run to your lectures!  Hurry! Hurry!", False, TEXT_SPEED*4))
 716                 else:
 717                         go_idle = 1
 718
 719                 ## check for X seconds to the hour
 720
 721                 if len(msg):
 722                         self.vstatus.mk.set_messages(msg)
 723                         sleep(1)
 724
 725                 self.vstatus.mk.update_display()
 726                 ## if no longer case, return to idle
 727
 728                 ## change idler to be clock
 729                 if go_idle and self.vstatus.mk.done():
 730                         self.vstatus.change_state(STATE_IDLE,1)
 731
 732         """
 733         What to do when the door is open.
 734         """
 735         def handle_door_idle(self, event, params):
 736                 def twiddle(clock,v,wise = 2):
 737                         if (clock % 4 == 0):
 738                                 v.display("-FEED  ME-")
 739                         elif (clock % 4 == 1+wise):
 740                                 v.display("\\FEED  ME/")
 741                         elif (clock % 4 == 2):
 742                                 v.display("-FEED  ME-")
 743                         elif (clock % 4 == 3-wise):
 744                                 v.display("/FEED  ME\\")
 745
 746                 # don't care right now.
 747                 now = int(time())
 748
 749                 if ((now % 60 % 2) == 0):
 750                         twiddle(now, self.v)
 751                 else:
 752                         twiddle(now, self.v, wise=0)
 753
 754         """
 755         What to do when the door is opened or closed.
 756         """
 757         def handle_door_event(self, event, params):
 758                 if params == 0:  #door open
 759                         self.vstatus.change_state(STATE_DOOR_OPENING)
 760                         logging.warning("Entering open door mode")
 761                         self.v.display("-FEED  ME-")
 762                         #door_open_mode(v);
 763                         self.vstatus.cur_user = ''
 764                         self.vstatus.cur_pin = ''
 765                 elif params == 1:  #door closed
 766                         self.vstatus.change_state(STATE_DOOR_CLOSING)
 767                         self.reset_idler(3)
 768
 769                         logging.warning('Leaving open door mode')
 770                         self.v.display("-YUM YUM!-")
 771
 772         """
 773         Triggered when a user swipes their caed, and the machine is logged out.
 774         """
 775         def handle_mifare_event(self, event, params):
 776                 card_id = params
 777                 # Translate card_id into uid.
 778                 if card_id == None or card_id == self._last_card_id:
 779                         return
 780
 781                 self._last_card_id = card_id
 782
 783                 self.dispense.authMifareCard(card_id)
 784                 logging.info('Mapped card id to uid %s'%self.dispense.getUsername())
 785                 if not self.dispense.isLoggedIn():
 786                         self.v.beep(40, False)
 787                         self.vstatus.mk.set_messages(
 788                                 [(self.center('BAD CARD'), False, 1.0),
 789                                  (self.center('SORRY'), False, 0.5)])
 790                         self.vstatus.cur_user = ''
 791                         self.vstatus.cur_pin = ''
 792                         self._last_card_id = -1
 793
 794                         self.reset_idler(2)
 795                         return
 796                 elif self.dispense.isDisabled():
 797                         self.v.beep(40, False)
 798                         self.vstatus.mk.set_messages(
 799                                 [(self.center('ACCT DISABLED'), False, 1.0),
 800                                  (self.center('SORRY'), False, 0.5)])
 801                         self.dispense.logOut()
 802                         self.reset_idler(2)
 803                         return
 804                 else:
 805                         self.vstatus.cur_selection = ''
 806                         self.vstatus.change_state(STATE_GET_SELECTION)
 807                         self.scroll_options(self.vstatus.username, self.vstatus.mk, True)
 808                         return
 809
 810         """
 811         Triggered when a user swipes their card and the machine is logged in.
 812         """
 813         def handle_mifare_add_user_event(self, event, params):
 814                 card_id = params
 815
 816                 # Translate card_id into uid.
 817                 if card_id == None or card_id == self._last_card_id:
 818                         return
 819
 820                 self._last_card_id = card_id
 821
 822                 if not self.dispense.addCard(card_id):
 823                         self.vstatus.mk.set_messages(
 824                                 [(self.center('ALREADY'), False, 0.5),
 825                                  (self.center('ENROLLED'), False, 0.5)])
 826                 else:
 827                         self.vstatus.mk.set_messages(
 828                                 [(self.center('CARD'), False, 0.5),
 829                                  (self.center('ENROLLED'), False, 0.5)])
 830
 831         def return_to_idle(self, event, params):
 832                 self.reset_idler()
 833
 834         """
 835         Maps what to do when the state changes.
 836         """
 837         def create_state_table(self):
 838                 self.vstatus.state_table[(STATE_IDLE,TICK,1)] = self.handle_idle_tick
 839                 self.vstatus.state_table[(STATE_IDLE,KEY,1)] = self.handle_idle_key
 840                 self.vstatus.state_table[(STATE_IDLE,DOOR,1)] = self.handle_door_event
 841                 self.vstatus.state_table[(STATE_IDLE,MIFARE,1)] = self.handle_mifare_event
 842
 843                 self.vstatus.state_table[(STATE_DOOR_OPENING,TICK,1)] = self.handle_door_idle
 844                 self.vstatus.state_table[(STATE_DOOR_OPENING,DOOR,1)] = self.handle_door_event
 845                 self.vstatus.state_table[(STATE_DOOR_OPENING,KEY,1)] = self.do_nothing
 846                 self.vstatus.state_table[(STATE_DOOR_OPENING,MIFARE,1)] = self.do_nothing
 847
 848                 self.vstatus.state_table[(STATE_DOOR_CLOSING,TICK,1)] = self.return_to_idle
 849                 self.vstatus.state_table[(STATE_DOOR_CLOSING,DOOR,1)] = self.handle_door_event
 850                 self.vstatus.state_table[(STATE_DOOR_CLOSING,KEY,1)] = self.do_nothing
 851                 self.vstatus.state_table[(STATE_DOOR_CLOSING,MIFARE,1)] = self.do_nothing
 852
 853                 self.vstatus.state_table[(STATE_GETTING_UID,TICK,1)] = self.handle_getting_uid_idle
 854                 self.vstatus.state_table[(STATE_GETTING_UID,DOOR,1)] = self.handle_door_event
 855                 self.vstatus.state_table[(STATE_GETTING_UID,KEY,1)] = self.handle_getting_uid_key
 856                 self.vstatus.state_table[(STATE_GETTING_UID,MIFARE,1)] = self.handle_mifare_event
 857
 858                 self.vstatus.state_table[(STATE_GETTING_PIN,TICK,1)] = self.handle_getting_pin_idle
 859                 self.vstatus.state_table[(STATE_GETTING_PIN,DOOR,1)] = self.handle_door_event
 860                 self.vstatus.state_table[(STATE_GETTING_PIN,KEY,1)] = self.handle_getting_pin_key
 861                 self.vstatus.state_table[(STATE_GETTING_PIN,MIFARE,1)] = self.handle_mifare_event
 862
 863                 self.vstatus.state_table[(STATE_GET_SELECTION,TICK,1)] = self.handle_get_selection_idle
 864                 self.vstatus.state_table[(STATE_GET_SELECTION,DOOR,1)] = self.handle_door_event
 865                 self.vstatus.state_table[(STATE_GET_SELECTION,KEY,1)] = self.handle_get_selection_key
 866                 self.vstatus.state_table[(STATE_GET_SELECTION,MIFARE,1)] = self.handle_mifare_add_user_event
 867
 868                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,TICK,1)] = self.handle_idle_grandfather_tick
 869                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,TICK,2)] = self.handle_grandfather_tick
 870                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,DOOR,1)] = self.handle_door_event
 871                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,DOOR,2)] = self.handle_door_event
 872                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,KEY,1)] = self.do_nothing
 873                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,KEY,2)] = self.do_nothing
 874                 self.vstatus.state_table[(STATE_GRANDFATHER_CLOCK,MIFARE,1)] = self.handle_mifare_event
 875
 876         """
 877         Get what to do on a state change.
 878         """
 879         def get_state_table_handler(self, state, event, counter):
 880                 return self.vstatus.state_table[(state,event,counter)]
 881
 882         def time_to_next_update(self):
 883                 idle_update = self.vstatus.time_of_next_idlestep - time()
 884                 if not self.vstatus.mk.done() and self.vstatus.mk.next_update is not None:
 885                         mk_update = self.vstatus.mk.next_update - time()
 886                         if mk_update < idle_update:
 887                                 idle_update = mk_update
 888                 return idle_update
 889
 890         def run_forever(self, rfh, wfh, options, cf):
 891                 self.v = VendingMachine(rfh, wfh, USE_MIFARE)
 892                 self.dispense = Dispense()
 893                 self.vstatus = VendState(self.v)
 894                 self.create_state_table()
 895
 896                 logging.debug('PING is ' + str(self.v.ping()))
 897
 898                 self.setup_idlers()
 899                 self.reset_idler()
 900
 901                 while True:
 902                         timeout = self.time_to_next_update()
 903                         (event, params) = self.v.next_event(timeout)
 904                         self.run_handler(event, params)
 905
 906         def run_handler(self, event, params):
 907                 handler = self.get_state_table_handler(self.vstatus.state,event,self.vstatus.counter)
 908                 if handler:
 909                         handler(event, params)
 910
 911 """
 912 Connect to the machine.
 913 """
 914 def connect_to_vend(options, cf):
 915
 916         if options.use_lat:
 917                 logging.info('Connecting to vending machine using LAT')
 918                 latclient = LATClient(service = cf.ServiceName, password = cf.ServicePassword, server_name = cf.ServerName, connect_password = cf.ConnectPassword, priv_password = cf.PrivPassword)
 919                 rfh, wfh = latclient.get_fh()
 920         elif options.use_serial:
 921                 # Open vending machine via serial.
 922                 logging.info('Connecting to vending machine using serial')
 923                 serialclient = SerialClient(port = '/dev/ttyS1', baud = 9600)
 924                 rfh,wfh = serialclient.get_fh()
 925         else:
 926                 #(rfh, wfh) = popen2('../../virtualvend/vvend.py')
 927                 logging.info('Connecting to virtual vending machine on %s:%d'%(options.host,options.port))
 928                 import socket
 929                 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
 930                 sock.connect((options.host, options.port))
 931                 rfh = sock.makefile('r')
 932                 wfh = sock.makefile('w')
 933                 global USE_MIFARE
 934                 USE_MIFARE = 0
 935
 936         return rfh, wfh
 937
 938 """
 939 Parse arguments from the command line
 940 """
 941 def parse_args():
 942         from optparse import OptionParser
 943
 944         op = OptionParser(usage="%prog [OPTION]...")
 945         op.add_option('-f', '--config-file', default='/etc/dispense2/servers.conf', metavar='FILE', dest='config_file', help='use the specified config file instead of /etc/dispense/servers.conf')
 946         op.add_option('--serial', action='store_true', default=False, dest='use_serial', help='use the serial port')
 947         op.add_option('--lat', action='store_true', default=False, dest='use_lat', help='use LAT')
 948         op.add_option('--virtualvend', action='store_false', default=True, dest='use_serial', help='use the virtual vending server instead of LAT')
 949         op.add_option('-n', '--hostname', dest='host', default='localhost', help='the hostname to connect to for virtual vending machine mode (default: localhost)')
 950         op.add_option('-p', '--port', dest='port', default=5150, type='int', help='the port number to connect to (default: 5150)')
 951         op.add_option('-l', '--log-file', metavar='FILE', dest='log_file', default='', help='log output to the specified file')
 952         op.add_option('-s', '--syslog', dest='syslog', metavar='FACILITY', default=None, help='log output to given syslog facility')
 953         op.add_option('-d', '--daemon', dest='daemon', action='store_true', default=False, help='run as a daemon')
 954         op.add_option('-v', '--verbose', dest='verbose', action='store_true', default=False, help='spit out lots of debug output')
 955         op.add_option('-q', '--quiet', dest='quiet', action='store_true', default=False, help='only report errors')
 956         op.add_option('--pid-file', dest='pid_file', metavar='FILE', default='', help='store daemon\'s pid in the given file')
 957         options, args = op.parse_args()
 958
 959         if len(args) != 0:
 960                 op.error('extra command line arguments: ' + ' '.join(args))
 961
 962         return options
 963
 964 def create_pid_file(name):
 965         try:
 966                 pid_file = file(name, 'w')
 967                 pid_file.write('%d\n'%os.getpid())
 968                 pid_file.close()
 969         except IOError, e:
 970                 logging.warning('unable to write to pid file '+name+': '+str(e))
 971
 972 def set_stuff_up():
 973         def do_nothing(signum, stack):
 974                 signal.signal(signum, do_nothing)
 975         def stop_server(signum, stack): raise KeyboardInterrupt
 976         signal.signal(signal.SIGHUP, do_nothing)
 977         signal.signal(signal.SIGTERM, stop_server)
 978         signal.signal(signal.SIGINT, stop_server)
 979
 980         options = parse_args()
 981         config_opts = VendConfigFile(options.config_file, config_options)
 982         if options.daemon: become_daemon()
 983         set_up_logging(options)
 984         if options.pid_file != '': create_pid_file(options.pid_file)
 985
 986         return options, config_opts
 987
 988 def clean_up_nicely(options, config_opts):
 989         if options.pid_file != '':
 990                 try:
 991                         os.unlink(options.pid_file)
 992                         logging.debug('Removed pid file '+options.pid_file)
 993                 except OSError: pass  # if we can't delete it, meh
 994
 995 def set_up_logging(options):
 996         logger = logging.getLogger()
 997
 998         if not options.daemon:
 999                 stderr_logger = logging.StreamHandler(sys.stderr)
1000                 stderr_logger.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
1001                 logger.addHandler(stderr_logger)
1002
1003         if options.log_file != '':
1004                 try:
1005                         file_logger = logging.FileHandler(options.log_file)
1006                         file_logger.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(message)s'))
1007                         logger.addHandler(file_logger)
1008                 except IOError, e:
1009                         logger.warning('unable to write to log file '+options.log_file+': '+str(e))
1010
1011         if options.syslog != None:
1012                 sys_logger = logging.handlers.SysLogHandler('/dev/log', options.syslog)
1013                 sys_logger.setFormatter(logging.Formatter('vendserver[%d]'%(os.getpid()) + ' %(levelname)s: %(message)s'))
1014                 logger.addHandler(sys_logger)
1015
1016         if options.quiet:
1017                 logger.setLevel(logging.WARNING)
1018         elif options.verbose:
1019                 logger.setLevel(logging.DEBUG)
1020         else:
1021                 logger.setLevel(logging.INFO)
1022
1023 def become_daemon():
1024         dev_null = file('/dev/null')
1025         fd = dev_null.fileno()
1026         os.dup2(fd, 0)
1027         os.dup2(fd, 1)
1028         os.dup2(fd, 2)
1029         try:
1030                 if os.fork() != 0:
1031                         sys.exit(0)
1032                 os.setsid()
1033         except OSError, e:
1034                 raise SystemExit('failed to fork: '+str(e))
1035
1036 def do_vend_server(options, config_opts):
1037         while True:
1038                 try:
1039                         rfh, wfh = connect_to_vend(options, config_opts)
1040                 except (SerialClientException, socket.error), e:
1041                         (exc_type, exc_value, exc_traceback) = sys.exc_info()
1042                         del exc_traceback
1043                         logging.error("Connection error: "+str(exc_type)+" "+str(e))
1044                         logging.info("Trying again in 5 seconds.")
1045                         sleep(5)
1046                         continue
1047
1048 #               run_forever(rfh, wfh, options, config_opts)
1049
1050                 try:
1051                         vserver = VendServer()
1052                         vserver.run_forever(rfh, wfh, options, config_opts)
1053                 except VendingException:
1054                         logging.error("Connection died, trying again...")
1055                         logging.info("Trying again in 5 seconds.")
1056                         sleep(5)
1057
1058
1059 def main(argv=None):
1060         options, config_opts = set_stuff_up()
1061         while True:
1062                 try:
1063                         logging.warning('Starting Vend Server')
1064                         do_vend_server(options, config_opts)
1065                         logging.error('Vend Server finished unexpectedly, restarting')
1066                 except KeyboardInterrupt:
1067                         logging.info("Killed by signal, cleaning up")
1068                         clean_up_nicely(options, config_opts)
1069                         logging.warning("Vend Server stopped")
1070                         break
1071                 except SystemExit:
1072                         break
1073                 except:
1074                         (exc_type, exc_value, exc_traceback) = sys.exc_info()
1075                         tb = format_tb(exc_traceback, 20)
1076                         del exc_traceback
1077
1078                         logging.critical("Uh-oh, unhandled " + str(exc_type) + " exception")
1079                         logging.critical("Message: " + str(exc_value))
1080                         logging.critical("Traceback:")
1081                         for event in tb:
1082                                 for line in event.split('\n'):
1083                                         logging.critical('    '+line)
1084                         logging.critical("This message should be considered a bug in the Vend Server.")
1085                         logging.critical("Please report this to someone who can fix it.")
1086                         sleep(10)
1087                         logging.warning("Trying again anyway (might not help, but hey...)")
1088
1089 if __name__ == '__main__':
1090         sys.exit(main())