feat: due date reminder

[navinkarkera]

Description

This PR adds a command to send reminder emails for self-paced courses with relative due dates enabled. The command takes in a argument due-in which allows us to send reminders for subsections due within specified number of days.

Testing instructions

• Setup master devstack
• Enable SelfPacedRelativeDateConfig globally.
• Add waffle flag studio.custom_relative_dates to allow adding custom relative dates to graded subsections.
• Start LMS and CMS using make {lms,cms}-up.
• Run make lms-migrate to add enqueue and deliver columns for new schedule.
• Open Schedules config and add an entry for localhost:18000 site and enable all flags.
• Go to demo course in studio and update start date to some date in past (around 2 months) and change pacing to self-paced (for this you might need to update start_date to some date in future and revert back).
• Login to LMS using edx user and enroll in the demo course.
• Go to schedules and update edx user's start_date to some recent date within the past one week.
• Open LMS shell using make lms-shell and run below command, play with date and due-in parameter and see the output. It should print email with subsections having due date falling within the days passed via due-in parameter.

  python manage.py lms send_course_due_date_reminders localhost:18000 --due-in 7

• Also, it should only send email if SelfPacedRelativeDateConfig is enabled and if course pacing is set to self-paced.
• Re-run the command by updating Due in field for a graded subsection:

Example output:

------- EMAIL -------
To: edx@example.com
From: Demonstration Course
Subject: Important course due dates coming up
Body:
Hi there! We wanted to remind you of some important due dates coming up for your course, Demonstration Course, that you need to be aware of. The due dates are coming up in the following subsections:


  * Lesson 1 - Getting Started (28 Jul 2023)

  * Homework - Question Styles (07 Aug 2023)

  * Lesson 2 - Let's Get Interactive! (02 Aug 2023)

  * Homework - Labs and Demos (02 Aug 2023)

  * Homework - Essays (02 Aug 2023)

  * Lesson 3 - Be Social (08 Aug 2023)

  * Homework - Find Your Study Buddy (08 Aug 2023)

  * More Ways to Connect (08 Aug 2023)


Happy learning!
-------  END  -------

Deadline

"None" if there's no rush, or provide a specific date or event (and reason) if there is one.

Other information

Doubts:

• Why is access_duration limited to max duration of 18 weeks?
• Copied relative week due date logic from course_date_signals handler. It sets minimum of 1 week for each section. Not sure if it is valid.
• Some tests in schedules app are not running due to invalid condition in skip check. Many tests fail as soon as we fix the condition, we probably cannot fix it now but creating a issue might help.

  # Currently it is set to.
  'openedx.core.djangoapps.schedules.apps.SchedulesConfig' in settings.INSTALLED_APPS
  # Should be below as it is set this way in common settings.
  'openedx.core.djangoapps.schedules' in settings.INSTALLED_APPS

Private-ref: BB-7407

[openedx-webhooks]

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[Agrendalath]

@navinkarkera, this works great! I'll convert this to a draft for now so we can test it on Staging.

[open-craft-grove]

Sandbox destroy request received.

[mphilbrick211]

Hi @navinkarkera and @Agrendalath! Just checking to see if this is still in progress?

[Agrendalath]

@mphilbrick211, this has already been implemented, but we must pass it through the client's QA. This should be resumed around March. It would be great to get your product review in the meantime.

[jmakowski1123]

Thanks @Agrendalath . With the info provided here, this seems like a nice addition. I'd like to be able to see the whole workflow in action, from adding the due date in the graded subsection to creating and sending an email that pulls the query. Is it possible to play with it in your sandbox?

[Agrendalath]

@jmakowski1123, thanks for checking. Of course, we will create a sandbox once we move forward with the implementation after the initial QA. We're discussing adding more features, like opting out of these emails for individual courses.
However, we had some reprioritizations with the client, so we are still trying to determine when to resume this PR.

[jmakowski1123]

Ok, let's keep this on hold then until it becomes a priority, and then can continue reviewing once you have specs for the new features.