feat: Make account activation use html e-mail

src/fellchensammlung/registration_views.py

@@ -0,0 +1,29 @@
+from django.utils.html import strip_tags
+from django_registration.backends.activation.views import RegistrationView
+from django.core.mail import EmailMultiAlternatives
+from django.template.loader import render_to_string
+from django.conf import settings
+
+
+class HTMLMailRegistrationView(RegistrationView):
+    def send_activation_email(self, user):
+        """
+        overwrites the function in django registration
+        """
+        activation_key = self.get_activation_key(user)
+        context = self.get_email_context(activation_key)
+        context["user"] = user
+        subject = render_to_string(
+            template_name=self.email_subject_template,
+            context=context,
+            request=self.request,
+        )
+        # Force subject to a single line to avoid header-injection issues.
+        subject = "".join(subject.splitlines())
+        message = render_to_string(
+            template_name=self.email_body_template,
+            context=context,
+            request=self.request,
+        )
+        plain_message = strip_tags(message)
+        user.email_user(subject, plain_message, settings.DEFAULT_FROM_EMAIL, html_message=message)