Fix #277 -- Embeddable shop (#622)

* Vendor vue.js

* Refactor item_group_by_category to support vouchers

* Widget: Show product list

* Widget: free prices

* Widget: pictures and loading indicator

* Widget: First iframe steps

* Widget: Do not rerender iframe

* Widget: Error handling

* Improve widget

* Widget: localization tech

* Fix invoice style

* Voucher attribute and waiting list

* Add some iframe chrome

* First step to namespaced carts

* More isolation steps

* More cart isolation things

* More cart isolation things

* Mobile stuff

* Show cart on checkout pages

* PayPal and Stripe support

* Enable downloads

* Locale handling

* change text "save URL to this exact page"

* Widget: voucher redemption

* Widget: CSS

* CSS: Responsive

* Widget: CSS improvements

* Widget: Add embedding code generator

* Widget: Error messages and SSL check

* First tests

* Widget: tests

* Don't use IDs in widgets

* Widget: static files caching

src/pretix/presale/management/commands/updatestyles.py

@@ -1,15 +1,38 @@
+import hashlib
+
+from django.conf import settings
+from django.core.files.base import ContentFile
+from django.core.files.storage import default_storage
 from django.core.management.base import BaseCommand
 
 from pretix.base.models import Event_SettingsStore, Organizer_SettingsStore
+from pretix.base.settings import GlobalSettingsObject
+from pretix.presale.views.widget import generate_widget_js
 
 from ...style import regenerate_css, regenerate_organizer_css
 
 
 class Command(BaseCommand):
-    help = "Re-generate all custom stylesheets"
+    help = "Re-generate all custom stylesheets and scripts"
 
     def handle(self, *args, **options):
         for es in Event_SettingsStore.objects.filter(key="presale_css_file"):
             regenerate_css.apply_async(args=(es.object_id,))
+
         for es in Organizer_SettingsStore.objects.filter(key="presale_css_file"):
             regenerate_organizer_css.apply_async(args=(es.object_id,))
+
+        gs = GlobalSettingsObject()
+        for lc, ll in settings.LANGUAGES:
+            data = generate_widget_js(lc).encode()
+            checksum = hashlib.sha1(data).hexdigest()
+            fname = gs.settings.get('widget_file_{}'.format(lc))
+            if not fname or gs.settings.get('widget_checksum_{}'.format(lc), '') != checksum:
+                newname = default_storage.save(
+                    'widget/widget.{}.{}.js'.format(lc, checksum),
+                    ContentFile(data)
+                )
+                gs.settings.set('widget_file_{}'.format(lc), 'file://' + newname)
+                gs.settings.set('widget_checksum_{}'.format(lc), checksum)
+                if fname:
+                    default_storage.delete(fname)