Issue #3531056: Extend Accept Hosted integration for Authorize.Net to support the unified merchant payment form

Issue #3531056: Extend Accept Hosted integration for Authorize.Net to support the unified merchant payment form.

Summary

This MR refactors and extends the commerce_authnet Accept Hosted integration, modernizing its frontend code and improving how transaction type, amount, and contexts are handled across both checkout and merchant payment flows.

Key changes

Libraries

• Removed deprecated core/jquery and core/jquery.once.
• Added core/once dependency to form-accept-hosted.

Module / Form handling

• Updated commerce_authnet_form_alter() to pass EntityContext::fromEntity($order) and build contexts before rendering Accept Hosted forms.

Services

• Added new event subscriber: commerce_authnet.payment_options_subscriber.

JavaScript

• Replaced old jQuery-based commerce_authnet.accept_hosted.form.js with vanilla JS + Drupal once().

• Improved iframe form submission:

  • Dynamic form creation + token posting.
  • CommunicationHandler for cancel, transactResponse, resizeWindow.
  • Stronger error handling + config validation (drupalSettings).

• Removed deprecated Drupal.commerceAuthorizeNetAcceptHostedForm call.

Event Subscriber

• Introduced PaymentOptionsSubscriber:

  • Ensures Accept Hosted payment options include their payment method type ID.
  • Fixes downstream issues when the gateway doesn’t explicitly set it.

Payment Gateway Plugin (AcceptHosted.php)

• Defined payment_type = "accept_hosted" + default_payment_method_type.
• Added forms definitions for add-payment and add-payment-method.
• onReturn() now uses transaction_type and amount from route params, falling back to checkout config if missing.
• Prevents order re-placement if beyond draft.
• Applies place transition only when valid.
• Refactored getPaymentPageRequestToken() to accept explicit capture + Price $amount.
• Updated getAcceptHostedCheckoutForm() to use context array (capture, amount, order, continueUrl, cancelUrl).

Payment Type

• Added Plugin\Commerce\PaymentType\AcceptHosted for dedicated type definition.

Plugin Form

• Added PluginForm\AcceptHosted\PaymentMethodAddForm:

  • Delegates form building to gateway plugin via context.
  • Context includes capture, amount, order, continueUrl, cancelUrl.
  • Preserves merchant-selected transaction type + amount across return.
  • Empty validate/submit hooks since hosted form handles them.

Why

Previously, Accept Hosted assumed transaction type + amount from checkout config (capture pane) and order total. This broke when merchants selected different values in the “Add payment” flow. By introducing context-driven form building and explicit route params, merchant-selected values are now preserved consistently.

Impact

• Correctly preserves merchant-selected transaction type and amount.
• Aligns with Commerce core patterns (contexts, event subscribers).
• Modernizes frontend (drops jQuery).
• Provides a cleaner extension point for future enhancements.