Keep order customer association after cross-browser AppSwitch for logged in users

[AlexP11223]

Now preserving the customer id in the order if the user was logged in when starting the checkout. That is we started checkout in a non-default browser logged in as user1, and finished in the default browser as a guest, the order will belong to user1.

The log-in prompt after the redirect to the default browser as a guest is disabled.

There is one a bit weird edge, when logged in as different users in both browsers. For now just using the user from the default browser to avoid confusion like going to My Account after the payment and not seeing the order. Maybe a better approach could be to force logout in the default browser. Anyway, hopefully this happens very rarely.

Also I added the woocommerce_order_email_verification_required filter handler to skip email prompt for such orders. It should not be needed in most cases because it is already skipped if the order was created less than 10 minutes ago, but probably a good idea to add that, e.g. if AppSwitch failed and finishing a bit later via another method.

[github-actions]

Test using WordPress Playground

The changes in this pull request can be previewed and tested using a WordPress Playground instance.
WordPress Playground is an experimental project that creates a full WordPress instance entirely within the browser.

🔗 Test this pull request with WordPress Playground

What's included:

• ✅ WordPress (latest)
• ✅ WooCommerce (latest)
• ✅ PayPal Payments plugin v3.0.9-pr3613-17467849478-g3e6c4bf (built from this PR)

Login credentials:

• Username: admin
• Password: password

Plugin Details:

• Version: 3.0.9-pr3613-17467849478-g3e6c4bf
• Commit: 3e6c4bf
• Artifact: woocommerce-paypal-payments-3.0.9-pr3613-17467849478-g3e6c4bf

💡 The demo environment resets each time you refresh. Perfect for testing!

🔄 This link updates automatically with each new commit to the PR.

⚠️ This URL is valid for 30 days from when this comment was last updated.

---

_{🤖 Auto-generated for commit 3e6c4bf • Last updated: 2025-09-04T15:00:52.391Z}

[Narek13]

Thanks for working on this. Left a small suggestion which doesn't prevent me from approving.

[hmouhtar]

AppSwitch flows are short-lived. If the email prompt is already disabled for orders that were created within the last 10 minutes, I think that's enough, and I don't see much value in extending the support timeframe compared to the side effects that removing this prompt might have, since essentially all orders would be marked with CROSS_BROWSER_APPSWITCH_META_KEY. I'm not even sure AppSwitch will work 10 minutes after it was triggered, so I would recommend removing this.

Not a blocker anyway, thanks for working on this @AlexP11223

[AlexP11223]

I encountered it some time ago, though not sure how. It can be useful not for AppSwitch itself but when it fails and the customer retries using different methods.

essentially all orders would be marked

all orders? 🤔 Only cross-browser are supposed to be marked, which should be quite rare.