Split checkout: Display "Update" button on the order table page unless order is complete

[jibees]

What? Why?

With the split checkout, we can access the /cart between the different steps: for this cases, cart actions should be displayed (and not only for the cart state)
Closes #8940

What should we test?

With split_checkout feature toggle activated:

• Proceed to checkout with a product that on hand
• As an admin, set the stock of the product to 0
• Between each steps, you should be redirected to the /cart page with an "Update" button

With legacy checkout:

• Proceed to checkout with a product that on hand
• As an admin, set the stock of the product to 0
• Fill the form, and click on the submit button
• you should be redirected to the /cart page with an "Update" button

This modification comes from an issue around the split checkout, but could impact the legacy checkout system: ie. the code is shared between split/legacy checkout.
I've tested this page for both split and legacy checkout and I didn't find any issue, but maybe I've missed some place where this page/table is used.

Release notes

Changelog Category: User facing changes

The title of the pull request will be included in the release notes.

[mkllnk]

No spec?

[jibees]

No spec?

You're right, this needs some systems specs.
Back to In dev

[jibees]

No spec?

Already done by @filipefurtad0 : thanks! 🙏

Back in Code Review

[mkllnk]

👍

[filipefurtad0]

Hey @jibees ,

I think we need another look at this one.

I've started the test with no issues: restricting the stock on /details and /payment steps redirected to /cart and displayed the "Details" button.

After that, the checkout pages broke, for this shop (even after emptying the cart and starting over the checkout process) and for other shops too:

The reason seems to be that the redirection is pointing to the /summary step, even when changing shops for that user. Logging out and again with another user was fine, i.e., checkout was possible.

Also, a bugsnag got triggered, during these tests. But I think for a different issue, here.

[filipefurtad0]

I'll run some more tests around these scenarios in another server, as double check. Maybe it all relates to that UI issue, and this is good to merge 🤞

[jibees]

Thanks @filipefurtad0
We definitely needs to find a way to reproduce this bug, as it seems to be very constrained.

[filipefurtad0]

Alright - other that #8963 which for some reason caused this persistent redirect to the /summary page, for that shop in staging-UK - I've found no other issues here.

I've checked both scenarios mentioned, can't think of anywhere else to check - I'd say we're good 👍

This closes the underlying issue - merging! 🎉