New pretixdroid configuration system

src/pretix/plugins/pretixdroid/models.py

@@ -0,0 +1,27 @@
+import string
+
+from django.db import models
+from django.utils.crypto import get_random_string
+from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+
+
+class AppConfiguration(models.Model):
+    event = models.ForeignKey('pretixbase.Event')
+    key = models.CharField(max_length=190, unique=True, db_index=True)
+    all_items = models.BooleanField(default=True, verbose_name=_('Can scan all products'))
+    items = models.ManyToManyField('pretixbase.Item', blank=True, verbose_name=_('Can scan these products'))
+    subevent = models.ForeignKey('pretixbase.SubEvent', null=True, blank=True,
+                                 verbose_name=pgettext_lazy('subevent', 'Date'))
+    show_info = models.BooleanField(default=True, verbose_name=_('Show information'),
+                                    help_text=_('If disabled, the device can not see how many tickets exist and how '
+                                                'many are already scanned. pretixdroid 1.6 or newer only.'))
+    allow_search = models.BooleanField(default=True, verbose_name=_('Search allowed'),
+                                       help_text=_('If disabled, the device can not search for attendees by name. '
+                                                   'pretixdroid 1.6 or newer only.'))
+
+    def save(self, **kwargs):
+        if not self.key:
+            self.key = get_random_string(
+                length=32, allowed_chars=string.ascii_uppercase + string.ascii_lowercase + string.digits
+            )
+        return super().save(**kwargs)