💻 6103 allow existing users to subscribe to the newsletter

[AnneliesVlaar]

This PR adds "Newsletter" and "Danger zone" sections to the the profile page.

Before approving:

• Revise the client-facing messages
• Translate the client-facing messages to Dutch

Fixes #6103

How to test

• Log in as a student and go to the profile page. Note that there is no Newsletter section. The Delete profile button is now under its own Danger zone section.
• Create a new teacher account without subscribing to the newsletter at signup.
  • Go to the profile page and check that the Newsletter section is expanded by default. It should offer you to subscribe. Do not subscribe yet.
  • Log in as another teacher and invite the new teacher account you created as a student to a class (via username). Go back to the profile of the new teacher and check that the Invitations section of the profile is expanded by default but not the Newsletter. Once you accept/reject the invitation, the Newsletter section should get expanded by default.
  • Change line 69 in file newsletter.py to return True, so that you can simulate a successful subscription and restart the application. Click subscribe to the button, the UI should update without reloading the page.
  • Change line 2275 in the app.py file to subscription_status="subscribed" to simulate that there is a successful subscription. If you reload the profile page now, the Newsletter section should be disabled by default. When you open it, you should see a message confirming that you are subscribed.
  • Change the 2275 in the app.py file to subscription_status="unsubscribed". If you reload the profile page now, the Newsletter section should be expanded by default. It should ask you for feedback and let you resubscribe via the Mailchimp form.

[boryanagoncharenko]

I have the following proposal. Let's add a new section in the profile page which is only about the newsletter. It should be very short and perhaps we could even choose to make it expanded by default (if there are not any other sections that need to be expanded by default such as invitations). Also, since we are on this page, let's take the delete button out of the form since it is confusing.

So, if a user has never subscribed they will see this:

If they have subscribed and then unsubscribed, they will see this:

And this is how the delete profile section will look like:

What do you think?

[AnneliesVlaar]

Good idea to add a delete profile section

[AnneliesVlaar]

If a user subscribed to the newsletter and then via the link in the newsletter unsubscribed, do we know who is subscribed and unsubscribed?

[boryanagoncharenko]

If a user subscribed to the newsletter and then via the link in the newsletter unsubscribed, do we know who is subscribed and unsubscribed?

Yes, we do:

• if the user has never subscribed, they are not in the Mailchimp audience
• if the user has subscribed, we see that their status is "subscribed"
• if the user has unsubscribed, their status is "unsubscribed"

Btw I did not cover how this section will look for the people who are already subscribed. I guess the section should not be there at all?

[AnneliesVlaar]

Ah that's great. For people who already subscribed I would suggest to have something similar to the unsubscribed:

You're subscribed to our newsletter
Run to your mailbox to see if the new issue already has been delivered!

(Or something like that)

[boryanagoncharenko]

@AnneliesVlaar would you be able to:

• check this PR for usability
• see whether you agree with the written text, maybe some of the messages are too wordy?
• translate the new messages to Dutch

Thanks!