* Make validation errors appear
* Make validation errors appear all at once
* Simplify diff
* Expose shippingErrorStatus from shipping context
* Memoize currentErrorStatus
* Pass currentErrorStatus to observers
* Add missing type-def property
* Fix typo in constant name
* Refactor emitEvent so false responses don't return true
* Make onCheckoutProcessing observers return errorMessage and validationErrors properties
* Allow for priority to be set on event emitters
* Add payment event emitters
* add new actions/status to checkout state context
* implement event emitters in payment data context
* refactor checkout state context to use new actions in event emitters
* refactor checkout processor to handle new event emitters
* fix type-defs for registered payment methods
* register observer for cheque payment method integration
* add inline todo
* fix sort
* fix tests and add test for priority usage in event emitters
* remove todo and just add explanatory comment
* condense sort logic
* lowercase test description
* abstract emitter callback to reduce code
* don’t process passed in errors if it’s undefined
* improve error response expectation for payment processing event observer
* Hook up checkout validation with context
* Make sure hasValidationErrors is up to date in onCheckoutProcessing
* Move validation check inside CheckoutProcessor's processCheckout
* Make sure all checkout form fields have a unique ID
* Don't clear checkout context errors in shipping context
* Move CheckoutProcessor to the top so scrollToTop works
* Do not disable Place Order Button if there are errors
* Split checkValidation and processCheckout in Checkout Provider
* Refactor event emitter to use Maps
* Save payment method errors to validation context
* Show an notice when a payment method has an error
* Make sure JS errors during payment are displayed
* Remove error notice when payment method doesn't return an error anymore
* Make sure payment methods know if shipping and billing addresses are the same
* Make sure checkout is only processed if payment methods didn't fail
* Make sure state input also has an id
* Clear input and select errors on unmount
* Pass id to CountryInput and StateInput
* Fix function name
* Add missing default context values
* Move onCheckoutCompleteError effect to CheckoutBlock
* Remove conditional from shipping setHasError
* restructure event-emit directory and convert emitters to promises
- also add emitEventWithAbort function
* implement event emitters as promises
* clean up logic
- return from for loop
- define response as const on each iteration.
- return true if loop completes successfully.
* rename event_emit folder to event-emit
Albert Juhé Lluveras
Darren Ethier