def start():
global ser
cash_reg = [ ]
dac_index = []
prev_cost = 0
prev_len = 0
stream_flag = 1
print_val = ''
reg = ['@r1']
flag = 1
start_rec = 0
wrong_id = 0
start_count = 0
correct_id = 0
r_flag = 0
getting_barcode = 0
prod = 0
quan = 0
qty = ''
barcode = ''
total_price = 0
ack_flag = 0
cancel_transaction = 0
got_response = 0
timeout = time.time() + 3
language_flag = 0
pdu_update_flag = 0
oldtime = 0
print_flag = 0
ended_trans = 0
last_trans = []
ser = serial.Serial(port=6, baudrate=9600, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_TWO, timeout=0.05)
ser.isOpen()
pdu_update_view = 0
trans_id = 0
while True:
pdu_timeout= time.time()+10
for item in reg:
send_pkg = item+'/'
ser.write(send_pkg)
print 'sending '+ send_pkg
timeout = time.time()+5
ser.flush() # empty write buffer
print 'here'
while flag :
if got_response ==1 or time.time()> timeout:
got_response =0
break
#ser.flush()
print 'check'
buffer = ser.readline() # read one, blocking
print buffer
if buffer == '@0/': #no response
got_response = 1
print 'No data'
elif buffer =='@0/@0/':
got_response = 1
print 'finished update'
elif buffer =='$/': #end transaction
print 'got $'
got_response = 1
content = []
print cash_reg
for index in cash_reg:
check = index.split()
print check
print str(check[0])+' '+str(check[1])
info = {
'barcode': int(check[0]),
'quantity': int(check[1])
}
content.append(info)
print content
value = transactions.add_transaction(content)
if value>0:
print 'Success '+ str(value)
trans_id = value
elif value==-1:
print 'Invalid quantity'
elif value==-2:
print 'Invalid barcode'
elif value==-3:
print 'Database error'
last_trans = cash_reg
cash_reg = []
ended_trans = 1
ser.write('/')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif buffer == '?/': #cancel transaction
got_response = 1
cash_reg = [ ]
ser.write('/')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif buffer == '!/': #change language
got_response = 1
if language_flag ==0:
language_flag = 1
else:
language_flag = 0
ser.write('/')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif len(buffer): #price process
if buffer[0] == '~':
got_response =1
barcode = buffer
products = []
products=database.Product.query.get(barcode[1:9])
dup_barcode = 0
if products is not None:
for check_barcode in cash_reg:
first_check = check_barcode.split()
if first_check[0] == barcode[1:9]:
dup_barcode = 1
break
if dup_barcode == 0:
quantity = barcode[10:-1]
quan_check = int(quantity)
print str(products.current_stock)+' '+str(quantity)
#raw_input("Press Enter to continue...")
product_stock=database.Product.query.get(barcode[1:9])
if (quan_check > product_stock.current_stock) or (quan_check == 0):
if language_flag == 0:
send_error='&0#P#R/'
else:
send_error='&0#@#B/'
ser.write(send_error)
while 1:
ack = ser.readline()
if ack == '@0/' :
break
break
price = products.current_price
if products.bundle_unit > 0:
if quantity >= products.bundle_unit:
price = price*0.9
print price
cash_reg.append(str(barcode[1:9])+' '+str(quantity)+' '+str(price))
print cash_reg
send_price = '&'
send_price += str(int(math.ceil(price*100.0)))
send_price+='/'
print send_price
ser.write(send_price)
while 1:
ack = ser.readline()
if ack == '@0/' :
break
break
else:
if language_flag == 0:
send_error='&0#P#Q/'
else:
send_error='&0#@#A/'
ser.write(send_error)
while 1:
ack = ser.readline()
if ack == '@0/' :
break
else:
print 'barcode doesnt exist'
barcode = ''
if language_flag == 0:
send_error='&0#P#Q/'
else:
send_error='&0#@#A/'
ser.write(send_error)
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif buffer[0] == '^':
got_response = 1
trolley = buffer[1:-1]
print 'Trolley: '+ str(trolley)
trolresponse= transactions.checkout_trolley(int(trolley))
trolleyresp = trolresponse.split(':')
trolprice = float(trolleyresp[1])
trans_id = int(trolleyresp[0])
send_trolley='+'
sent_price = int(math.ceil(trolprice*100.0))
if int(sent_price)==0:
if language_flag == 0:
sent_price='0#P#U'
else:
sent_price='0#@#E'
send_trolley+=str(sent_price)
send_trolley+='/'
ser.write(send_trolley)
print send_trolley
items = transactions.get_trolley_items(trolley)
print items
list = []
listitem = '0'
if len(items):
for item in items:
barcode=item['barcode']
quantity=item['quantity']
product=database.Product.query.get(barcode)
price = 'N.A.'
if product is not None:
price = product.current_price
listitem = str(barcode)+' '+str(quantity)+' %.2f'%(price)
print listitem
if listitem!='0':
last_trans.append(str(listitem))
print last_trans
#raw_input('test')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif buffer[0] == '>':
got_response = 1
splitcheck = buffer.split(')',1)
amount_p = splitcheck[0]
amount_rem = splitcheck[1]
amount_p= amount_p[1:]
actual = []
amount_paid = amount_p
digit_flag = 1
val = 7
final =''
while val>=0:
actual.append(str(amount_paid[val]))
val-=1
carry_over = 0
for digit in actual:
actdigit = ord(digit)-48
print digit+' '+str(actdigit)
if actdigit==10:
final+='0'
carry_over = 1
else:
if carry_over == 1:
digitwithcarry = actdigit+1
if digitwithcarry == 10:
carry_over=1
final+='0'
continue
else:
final+=str(digitwithcarry)
carry_over = 0
continue
final+=str(actdigit)
carry_over = 0
final = final[::-1]
amount_rem = amount_rem[:-1]
print str(int(final))+' '+str(int(amount_rem))
a1 = float(int(final)/100.0)
a2 = float(int(amount_rem)/100.0)
tot_price = float(a1-a2)
print_flag = 1
ended_trans = 0
if len(str(trans_id)):
trans = database.TransactionTimestamp.query.get(trans_id)
if trans is not None:
cash_id = trans.cashier_id
print_receipt(tot_price, trans_id, cash_id, a1, a2)
print str(tot_price)+' '+str(trans_id)+' '+str(cash_id)
print buffer
print last_trans
#raw_input("Press Enter to continue...")
trans_id = ''
ser.write('/')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
barcode = ''
got_response = 0
#today_date = time.time()
today_date = datetime.date.today()
print today_date
#raw_input("Press Enter to continue...")
if today_date != oldtime:
oldtime = today_date
update_pdu(ser)
var = pdu_update_view
print 'PDU FLAG:'+' '+str(var)
if var==1:
print 'updating explicitly'
pdu_update_view = 0
update_pdu(ser)
content = []
for index in cash_reg:
if zero_flag == 0 :
zero_flag = 1
else:
qty = index[10:]
qty = qty[:-1]
barcode = index[1:9]
print str(barcode) + str(qty)
info = {
'barcode': int(barcode),
'quantity': int(qty)
}
content.append(info)
print content
value = transactions.add_transaction(content)
if value>0:
print 'Success '+ str(value)
elif value==-1:
print 'Invalid quantity'
elif value==-2:
print 'Invalid barcode'
elif value==-3:
print 'Database error'
cash_reg=[ 0 ]
ser.write('/')
while 1:
ack = ser.readline()
if ack == '@0/' :
break
elif buffer == '%/':