Unsubscribe/unfollow links

Problem: We want to be able to do the following easily from a received email:

• turn off project update reminders for a single project
• unfollow a task
• unfollow a thread
• unfollow a update

Technical considerations

There need to be quite a few ‘unsubscribe’ style actions, how can we handle this with relatively simple code?

One option is to have all these actions with a common route:

/unsubscribe/all
/unsubscribe/project-reminders
/unsubscribe/task
/unsubscribe/thread
/unsubscribe/update

This could happen via a new unsubscribe controller, and have a single template.

Steps

1. Refactor: Existing unsubscribe flow -> new code structure
2. Unsubscribe - project reminders
3. Unsubscribe - task
4. Unsubscribe - thread
5. Unsubscribe - update