Data model

src/pretix/base/migrations/0135_auto_20190910_2020.py

@@ -0,0 +1,47 @@
+# Generated by Django 2.2.1 on 2019-09-10 20:20
+
+from django.db import migrations, models
+import django.db.models.deletion
+import pretix.base.models.fields
+import pretix.base.models.giftcards
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0134_auto_20190909_1042'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GiftCard',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('issuance', models.DateTimeField(auto_now_add=True)),
+                ('secret', models.CharField(db_index=True, default=pretix.base.models.giftcards.gen_giftcard_secret, max_length=190, unique=True)),
+                ('currency', models.CharField(max_length=10)),
+                ('issued_in', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards', to='pretixbase.OrderPosition')),
+                ('issuer', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards', to='pretixbase.Organizer')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='GiftCardTransaction',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('datetime', models.DateTimeField(auto_now_add=True)),
+                ('value', models.DecimalField(decimal_places=2, max_digits=10)),
+                ('card', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='transactions', to='pretixbase.GiftCard')),
+                ('order', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='gift_card_transactions', to='pretixbase.Order')),
+                ('payment', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='gift_card_transactions', to='pretixbase.OrderPayment')),
+                ('refund', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='gift_card_transactions', to='pretixbase.OrderRefund')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='GiftCardAcceptance',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('collector', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='gift_card_issuer_acceptance', to='pretixbase.Organizer')),
+                ('issuer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='gift_card_collector_acceptance', to='pretixbase.Organizer')),
+            ],
+        ),
+    ]

src/pretix/base/models/__init__.py

@@ -7,6 +7,7 @@ from .event import (
     Event, Event_SettingsStore, EventLock, EventMetaProperty, EventMetaValue,
     RequiredAction, SubEvent, SubEventMetaValue, generate_invite_token,
 )
+from .giftcards import GiftCard, GiftCardAcceptance, GiftCardTransaction
 from .invoices import Invoice, InvoiceLine, invoice_filename
 from .items import (
     Item, ItemAddOn, ItemBundle, ItemCategory, ItemVariation, Question,

src/pretix/base/models/giftcards.py

@@ -0,0 +1,90 @@
+from decimal import Decimal
+
+from django.conf import settings
+from django.db import models
+from django.db.models import Sum
+from django.utils.crypto import get_random_string
+
+
+def gen_giftcard_secret():
+    charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+    while True:
+        code = get_random_string(length=settings.ENTROPY['giftcard_secret'], allowed_chars=charset)
+        if not GiftCard.objects.filter(secret=code).exists():
+            return code
+
+
+class GiftCardAcceptance(models.Model):
+    issuer = models.ForeignKey(
+        'Organizer',
+        related_name='gift_card_collector_acceptance',
+        on_delete=models.CASCADE
+    )
+    collector = models.ForeignKey(
+        'Organizer',
+        related_name='gift_card_issuer_acceptance',
+        on_delete=models.CASCADE
+    )
+
+
+class GiftCard(models.Model):
+    issuer = models.ForeignKey(
+        'Organizer',
+        related_name='issued_gift_cards',
+        on_delete=models.PROTECT,
+    )
+    issued_in = models.ForeignKey(
+        'OrderPosition',
+        related_name='issued_gift_cards',
+        on_delete=models.PROTECT,
+    )
+    issuance = models.DateTimeField(
+        auto_now_add=True,
+    )
+    secret = models.CharField(
+        max_length=190,
+        default=gen_giftcard_secret,
+        unique=True,
+        db_index=True,
+    )
+    currency = models.CharField(max_length=10)
+
+    @property
+    def value(self):
+        return self.transactions.aggregate(s=Sum('value'))['s'] or Decimal('0.00')
+
+
+class GiftCardTransaction(models.Model):
+    card = models.ForeignKey(
+        'GiftCard',
+        related_name='transactions',
+        on_delete=models.PROTECT
+    )
+    datetime = models.DateTimeField(
+        auto_now_add=True
+    )
+    value = models.DecimalField(
+        decimal_places=2,
+        max_digits=10
+    )
+    order = models.ForeignKey(
+        'Order',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )
+    payment = models.ForeignKey(
+        'OrderPayment',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )
+    refund = models.ForeignKey(
+        'OrderRefund',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )

src/pretix/settings.py

@@ -241,6 +241,7 @@ ENTROPY = {
     'order_code': config.getint('entropy', 'order_code', fallback=5),
     'ticket_secret': config.getint('entropy', 'ticket_secret', fallback=32),
     'voucher_code': config.getint('entropy', 'voucher_code', fallback=16),
+    'giftcard_secret': config.getint('entropy', 'giftcard_secret', fallback=16),
 }
 
 # Internal settings