Make Internet Archive integration opt-in (#250)

* Make web archive integration opt-in

* Add toast message about web archive integration opt-in

* Improve wording for web archive setting

* Add toast admin

* Fix toast clear button visited styles

* Add test for redirect

* Improve wording

* Ensure redirects to same domain

* Improve wording

* Fix snapshot test

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@gmail.com>

bookmarks/views/__init__.py

@@ -1,2 +1,3 @@
 from .bookmarks import *
 from .settings import *
+from .toasts import *

bookmarks/views/toasts.py

@@ -0,0 +1,19 @@
+from django.contrib.auth.decorators import login_required
+from django.http import HttpResponseRedirect, Http404
+from django.urls import reverse
+
+from bookmarks.models import Toast
+from bookmarks.utils import get_safe_return_url
+
+
+@login_required
+def acknowledge(request, toast_id: int):
+    try:
+        toast = Toast.objects.get(pk=toast_id, owner=request.user)
+    except Toast.DoesNotExist:
+        raise Http404('Toast does not exist')
+    toast.acknowledged = True
+    toast.save()
+
+    return_url = get_safe_return_url(request.GET.get('return_url'), reverse('bookmarks:index'))
+    return HttpResponseRedirect(return_url)