def buy(user, *products):
"""
Takes a user id (sci login name) and a list of products
(db id, may still require casting) and adds the bill to the intranet.
In case of a communication error this method blocks and retries to
add the bill to the intranet.
If the bill was added successfully True is returned. Otherwise,
if the given user is not allowed to purchase things or a products
is unknown, False is returned.
"""
logger = logging.getLogger("remote:buy")
beverages = encode_buy(products)
payload = {'buy': {'beverages': beverages, 'user': user}}
headers = {'content-type': 'application/json'}
# HTTP-200 -> ok
# HTTP-422 -> scanned user is not allowed to buy stuff
# HTTP-otherwise -> something went wrong, retry
logger.info("init buy sequence")
try_sync = True
while True:
try:
r = requests.put(URL_BUY,
data=json.dumps(payload),
headers=headers,
auth=(AUTH_USER, AUTH_PASSWORD))
if r.status_code == 200:
logger.info("...everything worked fine")
return True
elif r.status_code == 422:
# sync
if not try_sync:
logger.critical(
"...did not work (user or product unknown by FSIntra)")
return False
else:
logger.error(
"...did not work (user or product unknown by FSIntra) -> syncing"
)
try_sync = True
from product_list import PRODUCT_LIST
PRODUCT_LIST.update()
else:
# something went terribly wrong, retry
logger.critical("...worked perfectly wrong")
LCD.message_on(**MSG_BUY_RETRY)
time.sleep(MSG_BUY_RETRY_WAIT)
except requests.ConnectionError:
logger.critical("connection refused. Are you online")
LCD.message_on(**MSG_BUY_RETRY)
time.sleep(MSG_BUY_RETRY_WAIT)
def update_display():
global user_json
logger = logging.getLogger("actions:update_display")
logger.info("updating with...")
drinks = [(PRODUCT_LIST.get_name(pid), PRODUCT_LIST.get_price(pid)) for pid in products]
logger.info("...drinks: %s" % str(drinks))
total = sum([PRODUCT_LIST.get_price(pid) for pid in products])
logger.info("...total: %.2f" % total)
if user_json != None:
_gui.update(user, drinks, total, (float(user_json['running_debts']), float(user_json['debts'])))
else:
_gui.update(user, drinks, total)
def update_display():
global user_json
logger = logging.getLogger("actions:update_display")
logger.info("updating with...")
drinks = [(PRODUCT_LIST.get_name(pid), PRODUCT_LIST.get_price(pid))
for pid in products]
logger.info("...drinks: %s" % str(drinks))
total = sum([PRODUCT_LIST.get_price(pid) for pid in products])
logger.info("...total: %.2f" % total)
if user_json != None:
_gui.update(
user, drinks, total,
(float(user_json['running_debts']), float(user_json['debts'])))
else:
_gui.update(user, drinks, total)
def buy(user, *products):
"""
Takes a user id (sci login name) and a list of products
(db id, may still require casting) and adds the bill to the intranet.
In case of a communication error this method blocks and retries to
add the bill to the intranet.
If the bill was added successfully True is returned. Otherwise,
if the given user is not allowed to purchase things or a products
is unknown, False is returned.
"""
logger = logging.getLogger("remote:buy")
beverages = encode_buy(products)
payload = {'buy': {'beverages': beverages, 'user': user}}
headers = {'content-type': 'application/json'}
# HTTP-200 -> ok
# HTTP-422 -> scanned user is not allowed to buy stuff
# HTTP-otherwise -> something went wrong, retry
logger.info("init buy sequence")
try_sync = True
while True:
try:
r = requests.put(URL_BUY, data=json.dumps(payload), headers=headers, auth=(AUTH_USER, AUTH_PASSWORD))
if r.status_code == 200:
logger.info("...everything worked fine")
return True
elif r.status_code == 422:
# sync
if not try_sync:
logger.critical("...did not work (user or product unknown by FSIntra)")
return False
else:
logger.error("...did not work (user or product unknown by FSIntra) -> syncing")
try_sync = True
from product_list import PRODUCT_LIST
PRODUCT_LIST.update()
else:
# something went terribly wrong, retry
logger.critical("...worked perfectly wrong")
LCD.message_on(**MSG_BUY_RETRY)
time.sleep(MSG_BUY_RETRY_WAIT)
except requests.ConnectionError:
logger.critical("connection refused. Are you online")
LCD.message_on(**MSG_BUY_RETRY)
time.sleep(MSG_BUY_RETRY_WAIT)
def sync():
logger = logging.getLogger("actions:sync")
logger.info("syncing...")
_gui.message_on(**MSG_SYNC_ON)
success = PRODUCT_LIST.update()
time.sleep(MSG_SYNC_DELAY)
if success:
_gui.message(**MSG_SYNC_SUCCESS)
logger.info("sync successful")
else:
_gui.message(**MSG_SYNC_FAILED)
logger.error("sync failed")
def product_code(product_id):
logger = logging.getLogger("actions:product_code")
global products
stop_timer()
PRODUCT_LIST.idle.clear()
logger.info("scanned product: %s" % product_id)
try:
# don't let fools run the system into malicious states -> check cast
product_id = int(product_id)
except ValueError:
product_id = None
logger.critical("product code invalid (no int)")
if not product_id or not PRODUCT_LIST.contains(product_id):
logger.error("product code unknown")
_gui.message(**MSG_UNKNOWN_PRODUCT)
else:
products.append(product_id)
logger.info("product accepted, new list: %s" % str(products))
_gui.set_drink_image(PRODUCT_LIST.get_url(product_id))
start_timer()
update_display()
def sync():
logger = logging.getLogger("actions:sync")
logger.info("syncing...")
_gui.message_on(**MSG_SYNC_ON)
success = PRODUCT_LIST.update()
time.sleep(MSG_SYNC_DELAY)
if success:
_gui.message(**MSG_SYNC_SUCCESS)
logger.info("sync successful")
else:
_gui.message(**MSG_SYNC_FAILED)
logger.error("sync failed")
def product_code(product_id):
logger = logging.getLogger("actions:product_code")
global products
stop_timer()
PRODUCT_LIST.idle.clear()
logger.info("scanned product: %s" % product_id)
try:
# don't let fools run the system into malicious states -> check cast
product_id = int(product_id)
except ValueError:
product_id = None
logger.critical("product code invalid (no int)")
if not product_id or not PRODUCT_LIST.contains(product_id):
logger.error("product code unknown")
_gui.message(**MSG_UNKNOWN_PRODUCT)
else:
products.append(product_id)
logger.info("product accepted, new list: %s" % str(products))
_gui.set_drink_image(PRODUCT_LIST.get_url(product_id))
start_timer()
update_display()
def auto_sync():
logger = logging.getLogger("actions:auto_sync")
logger.info("cowardly syncing...")
# this is harpooning automagically during idle time - do not display anything
PRODUCT_LIST.update()
def auto_sync():
logger = logging.getLogger("actions:auto_sync")
logger.info("cowardly syncing...")
# this is harpooning automagically during idle time - do not display anything
PRODUCT_LIST.update()
