add downloadable lower thirds images to be used in voctomix

pretalx_broadcast_tools/views/voctomix_export.py

@@ -0,0 +1,22 @@
+from django.http import FileResponse, Http404
+from django.views import View
+from pretalx.common.text.path import safe_filename
+from pretalx.common.views.mixins import EventPermissionRequired
+
+from pretalx_broadcast_tools.management.commands.export_voctomix_lower_thirds import (
+    get_export_targz_path,
+)
+
+
+class BroadcastToolsLowerThirdsVoctomixDownloadView(EventPermissionRequired, View):
+    permission_required = "agenda.view_schedule"
+
+    def get(self, request, *args, **kwargs):
+        targz_path = get_export_targz_path(self.request.event)
+        if not targz_path.exists():
+            raise Http404()
+        response = FileResponse(open(targz_path, "rb"), as_attachment=True)
+        response["Content-Disposition"] = (
+            f"attachment; filename={safe_filename(targz_path.name)}"
+        )
+        return response