def scan_tickets(binary='zbarcam', signer=None):
import subprocess, sys
process = subprocess.Popen(binary, bufsize=1, stdout=subprocess.PIPE)
if signer is None:
signer = ticket_security.TicketSigner()
while True:
stdout = process.stdout.readline().strip()
if stdout.startswith('QR-Code:'):
data = stdout[8:]
# Ticket of doom
if sha256(data).hexdigest(
) == '6640cc0c536901fbc7c9f0fbe508a09c80be74656cb3ab915ec668503d54f91d':
import webbrowser
webbrowser.open('http://nyan.cat')
continue
try:
user = signer.verify(data)
un = User.get(user)
if un is None:
yield False, "user not found in DB"
continue
if not un.media_consent:
yield False, "user has not signed media consent"
continue
if un.checked_in:
yield False, "user already granted entry"
continue
un.mark_checked_in()
yield True, "{0} - {1} ({2})".format(un.organisation,
un.fullname, un.username)
except ValueError:
yield False, "ticket is not valid"
def _get_user_fields(self):
user_details = User.get(self.username)
if not user_details:
raise KeyError("username is unknown")
elif not user_details.media_consent:
raise ValueError("user has not signed a media consent form")
self.name = user_details.fullname
self.school = user_details.organisation
def _check_user(self, username, id_confirm):
"""Checks user details, moving into the wristbanding state on success"""
try:
user = User.get(username)
self.current_username = username
self.current_user = user
if user is None:
self._error_state("User '{}' not found".format(username))
elif not user.media_consent:
self._error_state("User '{}' ({}) has no media consent "
"{}".format(
user.fullname, username,
"or doesn't exist"
if user.fullname == username else ""))
elif user.checked_in:
self._error_state("User '{}' ({}) already checked-in".format(
user.fullname, username))
else:
if id_confirm:
self._set_message("Waiting for identity confirmation...",
GOOD)
self._can_scan = False
if not self._confirm_identity_dialog():
self._ready_state()
return
self._wristband_state(
"\nUser '{}' ({}) can be wristbanded".format(
user.fullname, username))
except ValueError as e:
self._error_state(str(e))