Add support for Bacs to handle Pre-Orders

[asumaran]

Part of #3803

Changes proposed in this Pull Request:

• Added support for pre-orders by initializing the maybe_init_pre_orders method in the constructor.

• Introduced the hide_bacs_for_pre_orders_charge_upon_release method to remove the Bacs payment option for pre-orders that are charged upon release. This prevents customers from selecting Bacs for pre-orders that are not charged upfront, as Bacs does not support delayed charges. The limitation is similar to the one affecting subscriptions with free trials.

Testing instructions

Important

First, make sure that the business in your Stripe account is located in the UK (link) and that your default currency is GBP (link). Otherwise you won't be able to see Bacs as a payment option.

Important

Update the store country to the UK and set the currency to GBP in the WooCommerce settings.

Important

Also, make sure the Bacs feature is enabled. You can use the following to do that:
wp option update _wcstripe_feature_lpm_bacs 'yes'. Also, you can enable Bacs using the dev tools extension.

• Switch to this branch.
• Install the WooCommerce Pre-Order extension

Test Pre-Orders that charge upon release

• Create a simple product.
• Enable pre-orders for the product.
• Define a future availability date.
• Set "When to Charge" to "Upfront"
• Add the product to cart.
• Checkout with Bacs without issues.

Test Pre-Orders that charge upon release

• Create a simple product.
• Enable pre-orders for the product.
• Define a future availability date.
• Set "When to Charge" to "Upon release"
• Add the product to cart and Bacs should not be available as payment option on the checkout form.

Changelog entry

• This Pull Request does not require a changelog entry. (Comment required below)

Changelog Entry Comment

Comment

Post merge

• Added testing instructions to the Release Testing Instructions wiki page (or does not apply)
• Added the needs docs label (or does not apply)
• Included this PR in the Release Thread scope (or does not apply)

[asumaran]

This should have been included in #3987.

[lovo-h]

Summary

The code changes look good and test as expected ✅

I left a few nit comments, but they were not blockers.

Test Instructions

• 🟢 Test Pre-Orders that charge Upfront.
  • Checkout with Bacs without issues.
• 🟢 Test Pre-Orders that charge Upon release.
  • Bacs is not available as a payment option in the checkout form.

[lovo-h]

LGTM! I left a few nit comments, but they were not blockers.

Test Instructions

• 🟢 Check out with Woo Pre-Orders uninstalled.
  • Checked out with Bacs without issues.
• 🟢 Test Pre-Orders that charge Upfront.
  • Checked out with Bacs without issues.
• 🟢 Test Pre-Orders that charge Upon release.
  • Bacs is unavailable as a payment option in the checkout form (see image below).