- Add PHP League's Container package via Composer.
- Add an ObjectContainer class that encapsulates all the configuration
and insulates the codebase from the concrete DI engine used.
- Add an improved ReflectionContainer class that will allow to
register individual classes as singletons while autowiring.
- Use ObjectContainer to resolve the WooCommerce class, everything
instantiated with "new" inside it, and all singletons that are
usually obtained via WC() function.
- Introduce the CustomerProvider class.
- Introduce a service provider to resolve WC_Queue_Interface,
this replaces the WC_Queue class.
- Mark as obsolete all the replaced "instance()" methods,
and the entire WC_Queue class.
And the WC_Action_Queue implementation of WC_Queue_Interface.
This avoids ambiguity between the behaviour of cancel(), which can
be confusing given it technically unschedules all actions for cron
or recurring actions, but only the next instance of a single action.
To more closely align return value with other date APIs in WC, namely
WC_Data. Includes changing return value to:
1. a WC_DateTime instead of a timestamp when a scheduled occurrence is found
2. null instead of false, similar to the default of WC_Data::set_date_prop()
To take care of instantiating a canonical job queue for use across
all of WooCommerce, and by 3rd party code.
Also use this new API for enqueuing webhooks instead of raw Action
Scheduler APIs.
As a wrapper for Action Scheduler. This implements the WC_Queue_Interface
so it can be used as WC core's job queue. Implementing WC_Queue_Interface
also means this class has more generic and appropriate job queue nomenclature
than Action Scheduler itself. For exsample, it provides a method for
non-delayed jobs, i.e. WC_Queue_Interface::add(), unlike Action Scheduler,
which requires scheduling a job for now(), which while fairly simple, is not
intuitive or immediately obvious to new comers.
This makes it both more clear and convenient to use Action Scheduler
as a simple job queue instead of just a queue for delayed jobs.