Fix #549 -- Multiple PDF ticket layouts (#938)

- [x] Data model
- [x] CRUD
- [x] Editor
- [x] Migration from old settings
- [x] Clone files when copying events
  - [x] badges?
- [x] Actual ticket output
- [x] Default layout on event creation
- [x] Link well from ticketing settings
- [x] Tests
- [x] Shipping plugin
  - [x] Migration
  - [x] Settings
  - [x] Create default
- [x] API

src/pretix/plugins/ticketoutputpdf/models.py

@@ -0,0 +1,70 @@
+import string
+
+from django.db import models
+from django.utils.crypto import get_random_string
+from django.utils.translation import ugettext_lazy as _
+
+from pretix.base.models import LoggedModel
+
+
+def bg_name(instance, filename: str) -> str:
+    secret = get_random_string(length=16, allowed_chars=string.ascii_letters + string.digits)
+    return 'pub/{org}/{ev}/ticketoutputpdf/{id}-{secret}.pdf'.format(
+        org=instance.event.organizer.slug,
+        ev=instance.event.slug,
+        id=instance.pk,
+        secret=secret
+    )
+
+
+class TicketLayout(LoggedModel):
+    event = models.ForeignKey(
+        'pretixbase.Event',
+        on_delete=models.CASCADE,
+        related_name='ticket_layouts'
+    )
+    default = models.BooleanField(
+        verbose_name=_('Default'),
+        default=False,
+    )
+    name = models.CharField(
+        max_length=190,
+        verbose_name=_('Name')
+    )
+    layout = models.TextField(
+        default='[{"italic": false, "bottom": "274.60", "align": "left", "fontfamily": "Open Sans", '
+                '"width": "175.00", "left": "17.50", "text": "Sample event name", "content": "event_name", '
+                '"fontsize": "16.0", "bold": false, "color": [0, 0, 0, 1], "type": "textarea"}, {"italic": false, '
+                '"bottom": "262.90", "align": "left", "fontfamily": "Open Sans", "width": "110.00", "left": "17.50", '
+                '"text": "Sample product \\u2013 sample variation", "content": "itemvar", "fontsize": "13.0", '
+                '"bold": false, "color": [0, 0, 0, 1], "type": "textarea"}, {"italic": false, "bottom": "252.50", '
+                '"align": "left", "fontfamily": "Open Sans", "width": "110.00", "left": "17.50", "text": "John Doe", '
+                '"content": "attendee_name", "fontsize": "13.0", "bold": false, "color": [0, 0, 0, 1], '
+                '"type": "textarea"}, {"italic": false, "bottom": "242.10", "align": "left", "fontfamily": "Open '
+                'Sans", "width": "110.00", "left": "17.50", "text": "May 31st, 2017", "content": "event_date_range", '
+                '"fontsize": "13.0", "bold": false, "color": [0, 0, 0, 1], "type": "textarea"}, {"italic": false, '
+                '"bottom": "204.80", "align": "left", "fontfamily": "Open Sans", "width": "110.00", "left": "17.50", '
+                '"text": "Random City", "content": "event_location", "fontsize": "13.0", "bold": false, "color": [0, '
+                '0, 0, 1], "type": "textarea"}, {"italic": false, "bottom": "194.50", "align": "left", "fontfamily": '
+                '"Open Sans", "width": "30.00", "left": "17.50", "text": "A1B2C", "content": "order", "fontsize": '
+                '"13.0", "bold": false, "color": [0, 0, 0, 1], "type": "textarea"}, {"italic": false, '
+                '"bottom": "194.50", "align": "right", "fontfamily": "Open Sans", "width": "45.00", "left": "52.50", '
+                '"text": "123.45 EUR", "content": "price", "fontsize": "13.0", "bold": false, "color": [0, 0, 0, 1], '
+                '"type": "textarea"}, {"italic": false, "bottom": "194.50", "align": "left", "fontfamily": "Open '
+                'Sans", "width": "90.00", "left": "102.50", "text": "tdmruoekvkpbv1o2mv8xccvqcikvr58u", "content": '
+                '"secret", "fontsize": "13.0", "bold": false, "color": [0, 0, 0, 1], "type": "textarea"}, '
+                '{"left": "130.40", "bottom": "204.50", "type": "barcodearea", "size": "64.00"}]'
+    )
+    background = models.FileField(null=True, blank=True, upload_to=bg_name, max_length=255)
+
+    class Meta:
+        ordering = ("name",)
+
+    def __str__(self):
+        return self.name
+
+
+class TicketLayoutItem(models.Model):
+    item = models.OneToOneField('pretixbase.Item', null=True, blank=True, related_name='ticketlayout_assignment',
+                                on_delete=models.CASCADE)
+    layout = models.ForeignKey('TicketLayout', on_delete=models.CASCADE, related_name='item_assignments')