Order codes: Remove character '8' from charset

This commit is contained in:
Raphael Michel
2021-01-07 15:35:38 +01:00
parent b36feb229f
commit 779cefeaad
3 changed files with 13 additions and 8 deletions

View File

@@ -615,21 +615,26 @@ class Order(LockModel, LoggedModel):
return proposals
@staticmethod
def normalize_code(code):
tr = str.maketrans({
def normalize_code(code, is_fallback=False):
d = {
'2': 'Z',
'4': 'A',
'5': 'S',
'6': 'G',
})
}
if is_fallback:
d['8'] = 'B'
# 8 has been removed from the character set only in 2021, which means there are a lot of order codes
# with an 8 in it around. We only want to replace this when this is used in a fallback.
tr = str.maketrans(d)
return code.upper().translate(tr)
def assign_code(self):
# This omits some character pairs completely because they are hard to read even on screens (1/I and O/0)
# and includes only one of two characters for some pairs because they are sometimes hard to distinguish in
# handwriting (2/Z, 4/A, 5/S, 6/G). This allows for better detection e.g. in incoming wire transfers that
# handwriting (2/Z, 4/A, 5/S, 6/G, 8/B). This allows for better detection e.g. in incoming wire transfers that
# might include OCR'd handwritten text
charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ379')
iteration = 0
length = settings.ENTROPY['order_code']
while True:

View File

@@ -1974,7 +1974,7 @@ class OrderGo(EventPermissionRequiredMixin, View):
try:
return Order.objects.get(code=code, event=self.request.event)
except Order.DoesNotExist:
return Order.objects.get(code=Order.normalize_code(code), event=self.request.event)
return Order.objects.get(code=Order.normalize_code(code, is_fallback=True), event=self.request.event)
def get(self, request, *args, **kwargs):
code = request.GET.get("code", "").upper().strip()

View File

@@ -72,7 +72,7 @@ def _handle_transaction(trans: BankTransaction, matches: tuple, event: Event = N
try:
orders.append(event.orders.get(code=code))
except Order.DoesNotExist:
normalized_code = Order.normalize_code(code)
normalized_code = Order.normalize_code(code, is_fallback=True)
try:
orders.append(event.orders.get(code=normalized_code))
except Order.DoesNotExist:
@@ -83,7 +83,7 @@ def _handle_transaction(trans: BankTransaction, matches: tuple, event: Event = N
try:
orders.append(qs.get(event__slug__iexact=slug, code=code))
except Order.DoesNotExist:
normalized_code = Order.normalize_code(code)
normalized_code = Order.normalize_code(code, is_fallback=True)
try:
orders.append(qs.get(event__slug__iexact=slug, code=normalized_code))
except Order.DoesNotExist: