Fix #229 -- Consistent language between django and javascript

src/pretix/base/views/js_catalog.py

@@ -0,0 +1,25 @@
+from django.utils import timezone
+from django.views.decorators.cache import cache_page
+from django.views.decorators.http import etag
+from django.views.i18n import (
+    get_javascript_catalog, render_javascript_catalog, to_locale,
+)
+
+# Yes, we want to regenerate this every time the module has been imported to
+# refresh the cache at least at every code deployment
+import_date = timezone.now().strftime("%Y%m%d%H%M")
+
+
+# This is not a valid Django URL configuration, as the final
+# configuration is done by the pretix.multidomain package.
+js_info_dict = {
+    'packages': ('pretix',),
+}
+
+
+@etag(lambda *s, **k: import_date)
+@cache_page(3600, key_prefix='js18n-%s' % import_date)
+def js_catalog(request, lang):
+    packages = ['pretix']
+    catalog, plural = get_javascript_catalog(to_locale(lang), 'djangojs', packages)
+    return render_javascript_catalog(catalog, plural)