Load the API kernel service prior to dispatching the civi.api4.createRequest event when creating an API4 request

[jensschuppe]

Overview

Follow-up to #21771 for registering EventSubscriberInterface implementations prior to dispatching the civi.api4.createRequest event.

Before

When issueing an API4 request without having loaded the API kernel service (e.g. invoking the API4 via an Ajax request using CRM.api4()), the civi.api4.createRequest event will not be dispatched with all event subscribers, because the ones registering through an EventSubscriberInterface implementation are only being called when executing the request, as the API kernel service is not being loaded until then.

After

The event is being dispatched with all event subscribers.

Technical Details

This problem only occurs when no other API call has been issued before the API4 call, but API4 explorer fails for entities relying on their EventSubscriberInterface implementation when issueing API4 requests via Ajax.

Comments

This should go into 5.43 along with the original implementation of the civi.api4.createRequest event.

[civibot]

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[colemanw]

Looks good, thanks.