repeat events after updating them

[ETLaurent]

Summary

Replicate recurring events after updating them, not only after their first insertion into the database.

What are the specific steps to test this change?

• Checkout this branch
• Link this package to a A2 project
• Create a simple event (single type) and save id
• Edit the event and choose "Recurring" type

• Save it and check that the event as been replicated to the corresponding dates

What kind of change does this PR introduce?

(Check at least one)

• [ ] Bug fix
• [x] New feature
• [ ] Refactor
• [ ] Documentation
• [ ] Build-related changes
• [ ] Other

Make sure the PR fulfills these requirements:

• [x] It includes a) the existing issue ID being resolved, b) a convincing reason for adding this feature, or c) a clear description of the bug it resolves
• [x] The changelog is updated
• [ ] Related documentation has been updated
• [ ] Related tests have been updated

If adding a new feature without an already open issue, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[linear[bot]]

PRO-2756 [Recurring Events] As an editor, I should easily be able to manage recurring events so that I don't have to enter the same info multiple times.

This is for the A2 Kimpton instance. There are some issues with the recurring events option, perhaps a bug or might be an incomplete feature. For the kind of event that occurs regularly, they want to make sure they only have to enter the details once with multiple dates. Here's the functionality that is needed: * When adding an event, the user selects "recurring" and then can select from weekly, monthly, ~or custom.~ * When selecting weekly, the user should be able to pick a date and time such as "Friday at 5PM" * After saving, this event should appear on the grid calendar on all of its dates. This could be solved by [https://linear.app/apostrophecms/issue/PRO-2827/error-occurs-when-i-try-to-save-a-recurring-event](https://linear.app/apostrophecms/issue/PRO-2827/error-occurs-when-i-try-to-save-a-recurring-event)

[ETLaurent]

What happens if the event was repeated properly the first time? If that inserted 5 events the first time, does saving it again insert 5 more or do the relevant fields get cleared after each repeat to prevent that in some way? I don't see any indication of that.

@boutell Indeed it will insert 5 more events. Thing is when we edit a single day event to change it to recursive, it won't create the expected events if we use afterInsert (which seems to be problematic). We could avoid creating new replicated events when children events exist (using parentId field), and we could also update the "children" events with the new values of the parent one. Wdyt?