Added runtime SASS compliation and color settings

src/pretix/presale/style.py

@@ -0,0 +1,47 @@
+import hashlib
+import logging
+import os
+
+import django_libsass
+import sass
+from django.conf import settings
+from django.core.files.base import ContentFile
+from django.core.files.storage import default_storage
+
+from pretix.base.models import Event
+
+logger = logging.getLogger('pretix.presale.style')
+
+
+def regenerate_css(event_id: int):
+    event = Event.objects.select_related('organizer').get(pk=event_id)
+    sassdir = os.path.join(settings.STATIC_ROOT, 'pretixpresale/scss')
+
+    sassrules = [
+        '$brand-primary: {};'.format(event.settings.get('primary_color')),
+        '@import "main.scss";',
+    ]
+
+    css = sass.compile(
+        string="\n".join(sassrules),
+        include_paths=[sassdir], output_style='compressed',
+        custom_functions=django_libsass.CUSTOM_FUNCTIONS
+    )
+    checksum = hashlib.sha1(css.encode('utf-8')).hexdigest()
+    fname = '{}/{}/presale.{}.css'.format(
+        event.organizer.slug, event.slug, checksum[:16]
+    )
+
+    if event.settings.get('presale_css_checksum', '') != checksum:
+        newname = default_storage.save(fname, ContentFile(css))
+        event.settings.set('presale_css_file', newname)
+        event.settings.set('presale_css_checksum', checksum)
+
+
+if settings.HAS_CELERY:
+    from pretix.celery import app
+
+    regenerate_css_task = app.task(regenerate_css)
+
+    def regenerate_css(*args, **kwargs):
+        regenerate_css_task.apply_async(args=args, kwargs=kwargs)