X-Git-Url: https://git.ucc.asn.au/?p=uccvend-vendserver.git;a=blobdiff_plain;f=sql-edition%2Fservers%2FVendServer.py;h=b173d3cce6ce5e740ee6ba1c951f1db71fd437af;hp=9221a4dd0d67feb096cca6a68c34ab18e687c10e;hb=c9c2697965bbc2a88ed13e18c567792497b648f5;hpb=9f5e38aa488fc1e43ddcf0a2d0ee3a5d5f6f9af4;ds=sidebyside diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py index 9221a4d..b173d3c 100755 --- a/sql-edition/servers/VendServer.py +++ b/sql-edition/servers/VendServer.py @@ -1,50 +1,328 @@ #!/usr/bin/python +# vim:ts=4 -import sys, os, string, socket, time +USE_DB = 0 + +import sys, os, string, re, pwd +if USE_DB: import pg +from time import time, sleep from popen2 import popen2 -from pyPgSQL import PgSQL from LATClient import LATClient +from VendingMachine import VendingMachine +from ConfigParser import ConfigParser +from HorizScroll import HorizScroll + +GREETING = 'UCC SNACKS' +PIN_LENGTH = 4 + +DOOR = 1 +SWITCH = 2 +KEY = 3 + +class DispenseDatabase: + def __init__(self, vending_machine, host, name, user, password): + self.vending_machine = vending_machine + self.db = pg.DB(dbname = name, host = host, user = user, passwd = password) + 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 scroll_options(username, mk, welcome = False): + if welcome: + msg = [(center('WELCOME'), False, 0.8), + (center(username), False, 0.8)] + else: + msg = [] + choices = ' '*10+'CHOICES: ' + coke_machine = file('/home/other/coke/coke_contents') + cokes = coke_machine.readlines() + for c in cokes: + c = c.strip() + (slot_num, price, slot_name) = c.split(' ', 2) + if slot_name == 'dead': continue + choices += '%s8-%s (%sc) '%(slot_num, slot_name, price) + choices += '55-DOOR ' + choices += 'OR A SNACK. ' + choices += '99 TO READ AGAIN.' + msg.append((choices, False, None)) + mk.set_messages(msg) + +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: + e = v.next_event() + if e == None: break + (event, params) = e + if event == DOOR: + if params == 1: # door closed + v.display("BYE BYE!") + sleep(1) + return + +def center(str): + LEN = 10 + return ' '*((LEN-len(str))/2)+str -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' +class MessageKeeper: + def __init__(self, vendie): + # Each element of scrolling_message should be a 3-tuple of + # ('message', True/False if it is to be repeated, time to display) + self.scrolling_message = [] + self.v = vendie + self.next_update = None + def set_message(self, string): + self.scrolling_message = [(string, False, None)] + self.update_display(True) + + def set_messages(self, strings): + self.scrolling_message = strings + self.update_display(True) + + def update_display(self, forced = False): + if not forced and self.next_update != None and time() < self.next_update: + return + if len(self.scrolling_message) > 0: + if len(self.scrolling_message[0][0]) > 10: + (m, r, t) = self.scrolling_message[0] + a = [] + exp = HorizScroll(m).expand(padding = 10) + if t == None: + t = 0.1 + else: + t = t / len(exp) + for x in exp: + a.append((x, r, t)) + del self.scrolling_message[0] + self.scrolling_message = a + self.scrolling_message + newmsg = self.scrolling_message[0] + if newmsg[2] != None: + self.next_update = time() + newmsg[2] + else: + self.next_update = None + self.v.display(self.scrolling_message[0][0]) + if self.scrolling_message[0][1]: + self.scrolling_message.append(self.scrolling_message[0]) + del self.scrolling_message[0] + + def done(self): + return len(self.scrolling_message) == 0 if __name__ == '__main__': + cp = ConfigParser() + cp.read('/etc/dispense/servers.conf') + DBServer = cp.get('Database', 'Server') + DBName = cp.get('Database', 'Name') + DBUser = cp.get('VendingMachine', 'DBUser') + DBPassword = cp.get('VendingMachine', 'DBPassword') + + ServiceName = cp.get('VendingMachine', 'ServiceName') + ServicePassword = cp.get('VendingMachine', 'Password') # Open vending machine via LAT - latclient = LATClient(service = 'VEND', password = 'dmscptd') - (rfh, wfh) = latclient.get_fh() + if 0: + latclient = LATClient(service = ServiceName, password = ServicePassword) + (rfh, wfh) = latclient.get_fh() + else: + #(rfh, wfh) = popen2('../../virtualvend/vvend.py') + import socket + sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) + sock.connect(('localhost', 5150)) + rfh = sock.makefile('r') + wfh = sock.makefile('w') v = VendingMachine(rfh, wfh) - print v.ping() + print 'PING is', v.ping() + + if USE_DB: db = DispenseDatabase(v, DBServer, DBName, DBUser, DBPassword) + cur_user = '' + cur_pin = '' + cur_selection = '' + + mk = MessageKeeper(v) + mk.set_message(GREETING) + logout_timeout = None + last_timeout_refresh = None + + while True: + if USE_DB: db.handle_events() + + if logout_timeout != None: + time_left = logout_timeout - time() + if time_left < 10 and (last_timeout_refresh is None or last_timeout_refresh > time_left): + mk.set_message('LOGOUT: '+str(int(time_left))) + last_timeout_refresh = int(time_left) + + if logout_timeout != None and logout_timeout - time() <= 0: + logout_timeout = None + cur_user = '' + cur_pin = '' + cur_selection = '' + mk.set_message(GREETING) + + if logout_timeout and not mk.done(): logout_timeout = None + if len(cur_pin) == PIN_LENGTH and mk.done() and logout_timeout == None: + # start autologout + logout_timeout = time() + 10 + + mk.update_display() + + e = v.next_event(0) + if e == None: + e = v.next_event(0.1) + if e == None: + continue + (event, params) = e + print e + if event == DOOR: + if params == 0: + door_open_mode(v); + cur_user = '' + cur_pin = '' + mk.set_message(GREETING) + 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 = '' + mk.set_message(GREETING) + continue + cur_user += chr(key + ord('0')) + mk.set_message('UID: '+cur_user) + if len(cur_user) == 5: + uid = int(cur_user) + if not has_good_pin(uid): + mk.set_messages( + [(center('INVALID'), False, 0.7), + (center('PIN'), False, 0.7), + (center('SETUP'), False, 1.0), + (GREETING, False, None)]) + cur_user = '' + cur_pin = '' + continue + cur_pin = '' + mk.set_message('PIN: ') + continue + elif len(cur_pin) < PIN_LENGTH: + if key == 11: + if cur_pin == '': + cur_user = '' + mk.set_message(GREETING) + continue + cur_pin = '' + mk.set_message('PIN: ') + continue + cur_pin += chr(key + ord('0')) + mk.set_message('PIN: '+'X'*len(cur_pin)) + if len(cur_pin) == PIN_LENGTH: + username = verify_user_pin(int(cur_user), int(cur_pin)) + if username: + v.beep(0, False) + cur_selection = '' + scroll_options(username, mk, True) + continue + else: + v.beep(40, False) + mk.set_messages( + [(center('BAD PIN'), False, 1.0), + (center('SORRY'), False, 0.5), + (GREETING, False, None)]) + cur_user = '' + cur_pin = '' + continue + elif len(cur_selection) == 0: + if key == 11: + cur_pin = '' + cur_user = '' + cur_selection = '' + v.display('BYE!') + sleep(0.5) + mk.set_message(GREETING) + continue + cur_selection += chr(key + ord('0')) + mk.set_message('SELECT: '+cur_selection) + elif len(cur_selection) == 1: + if key == 11: + cur_selection = '' + scroll_options(username, mk) + 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 == '99': + scroll_options(username, mk) + cur_selection = '' + continue + 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) + sleep(0.5) + v.display('THANK YOU') + sleep(0.5) + cur_selection = '' + logout_timeout = time() + 10