Add webhooks for quota changes (Z#23232443)

doc/api/resources/webhooks.rst

@@ -70,6 +70,7 @@ The following values for ``action_types`` are valid with pretix core:
     * ``pretix.subevent.changed``
     * ``pretix.subevent.deleted``
     * ``pretix.event.item.*``
+    * ``pretix.event.quota.*``
     * ``pretix.event.live.activated``
     * ``pretix.event.live.deactivated``
     * ``pretix.event.testmode.activated``

src/pretix/api/webhooks.py

@@ -408,6 +408,12 @@ def register_default_webhook_events(sender, **kwargs):
             _('This includes product added or deleted and changes to nested objects like '
               'variations or bundles.'),
         ),
+        ParametrizedItemWebhookEvent(
+            'pretix.event.quota.*',
+            _('Quota changed'),
+            _('This includes related events like creation, deletion, opening or closing of quotas. '
+              'No webhook is sent for changes to the resulting availability.'),
+        ),
         ParametrizedEventWebhookEvent(
             'pretix.event.live.activated',
             _('Shop taken live'),

src/pretix/helpers/thumb.py

@@ -173,7 +173,6 @@ def create_thumbnail(source, size, formats=None):
     # filesystem path, this only works because _open() uses safe_join, which accepts absolute paths if they match the
     # expected base dir. For NanoCDN Files, this works because source.name is set to the storage path.
     source_rb = default_storage.open(source_name, mode='rb')
-    source_ext = os.path.splitext(source_name)[1].lower()
 
     image = Image.open(BytesIO(source_rb.read()), formats=formats or settings.PILLOW_FORMATS_QUESTIONS_IMAGE)
     try:
@@ -184,14 +183,11 @@ def create_thumbnail(source, size, formats=None):
     frames = []
     durations = []
     for f in ImageSequence.Iterator(image):
-        if f.mode in ("P", "PA") and source_ext == '.png':
-            f = f.convert('RGBA')
-        if f.mode not in ("1", "L", "RGB", "RGBA"):
-            f = f.convert('RGB')
         durations.append(f.info.get("duration", 1000))
         frames.append(resize_image(f, size))
     image_out = frames[0]
     save_kwargs = {}
+    source_ext = os.path.splitext(source_name)[1].lower()
 
     if source_ext == '.jpg' or source_ext == '.jpeg':
         # Yields better file sizes for photos
@@ -215,6 +211,10 @@ def create_thumbnail(source, size, formats=None):
     checksum = hashlib.md5(image.tobytes()).hexdigest()
     name = checksum + '.' + size.replace('^', 'c') + '.' + target_ext
     buffer = BytesIO()
+    if image_out.mode == "P" and source_ext == '.png':
+        image_out = image_out.convert('RGBA')
+    if image_out.mode not in ("1", "L", "RGB", "RGBA"):
+        image_out = image_out.convert('RGB')
     image_out.save(fp=buffer, format=target_ext.upper(), quality=quality, **save_kwargs)
     imgfile = ContentFile(buffer.getvalue())