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106 lines
3.9 KiB
Python
106 lines
3.9 KiB
Python
#
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# This file is part of pretix (Community Edition).
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#
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# Copyright (C) 2014-2020 Raphael Michel and contributors
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# Copyright (C) 2020-today pretix GmbH and contributors
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#
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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
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# Public License as published by the Free Software Foundation in version 3 of the License.
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#
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# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
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# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
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# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
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# this file, see <https://pretix.eu/about/en/license>.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along with this program. If not, see
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# <https://www.gnu.org/licenses/>.
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#
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import secrets
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from django.db import IntegrityError
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from django.db.models import Q
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from django_scopes import scopes_disabled
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from pretix.base.models import GiftCardAcceptance, Item
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from pretix.base.models.media import MediumKeySet, ReusableMedium
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def create_nfc_mf0aes_keyset(organizer):
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for i in range(20):
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public_id = secrets.randbelow(2 ** 32)
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uid_key = secrets.token_bytes(16)
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diversification_key = secrets.token_bytes(16)
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try:
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return MediumKeySet.objects.create(
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organizer=organizer,
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media_type="nfc_mf0aes",
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public_id=public_id,
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diversification_key=diversification_key,
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uid_key=uid_key,
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active=True,
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)
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except IntegrityError: # either race condition with another thread or duplicate public ID
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try:
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return MediumKeySet.objects.get(
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organizer=organizer,
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media_type="nfc_mf0aes",
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active=True,
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)
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except MediumKeySet.DoesNotExist:
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continue # duplicate public ID, let's try again
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@scopes_disabled()
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def get_keysets_for_organizer(organizer):
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sets = list(MediumKeySet.objects.filter(
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Q(organizer=organizer) | Q(organizer__in=GiftCardAcceptance.objects.filter(
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acceptor=organizer,
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active=True,
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reusable_media=True,
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).values_list("issuer_id", flat=True))
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))
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if organizer.settings.reusable_media_type_nfc_mf0aes and not any(
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ks.organizer == organizer and ks.media_type == "nfc_mf0aes" for ks in sets
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):
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new_set = create_nfc_mf0aes_keyset(organizer)
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if new_set:
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sets.append(new_set)
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return sets
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def perform_media_exchange(organizer, media_type, media_identifier, media_policy, media_action, op):
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medium = None
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if media_policy in [Item.MEDIA_POLICY_REUSE, Item.MEDIA_POLICY_REUSE_OR_NEW]:
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try:
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medium = ReusableMedium.objects.get(
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type=media_type,
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identifier=media_identifier,
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organizer=organizer,
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)
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except ReusableMedium.DoesNotExist:
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pass
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if not medium and media_policy in [Item.MEDIA_POLICY_NEW, Item.MEDIA_POLICY_REUSE_OR_NEW]:
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try:
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medium = ReusableMedium.objects.create(
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type=media_type,
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identifier=media_identifier,
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organizer=organizer,
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)
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except IntegrityError:
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raise ReusableMedium.DuplicateEntry()
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if medium:
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if media_action == 'append':
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medium.linked_orderpositions.add(*[op])
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elif media_action == 'replace':
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medium.linked_orderpositions.set([op])
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medium.save()
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return medium
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