feat: #82/checkout middleware

[Baroshem]

Description

Closes #82

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Mateuszpietrusinski]

Some improvements, but LGTM

[Mateuszpietrusinski]

Maybe better option is to have just if.

Suggested change

	switch (currentPath) {
	case 'shipping':
	if (!canEnterShipping(activeCart)) {
	app.context.redirect('/');
	}
	break;
	case 'billing':
	if (!canEnterBilling(activeCart)) {
	app.context.redirect('/');
	}
	break;
	case 'payment':
	if (!canEnterPayment(activeCart)) {
	app.context.redirect('/');
	}
	break;
	case 'thank-you':
	if (!canEnterThankYou(app.context)) {
	app.context.redirect('/');
	}
	break;
	}
	if(currentPath === 'shipping' && !canEnterShipping(activeCart)) {
	app.context.redirect('/');
	return;
	}
	if(currentPath === 'billing' && !canEnterBilling(activeCart)) {
	app.context.redirect('/');
	return;
	}
	if(currentPath === 'payment' && !canEnterPayment(activeCart)) {
	app.context.redirect('/');
	return;
	}
	if(currentPath === 'thank-you' && !canEnterThankYou(app.context)) {
	app.context.redirect('/');
	return;
	}
	}

Also IMO good idea is to replace strings via const or enum values

[Fifciu]

const or enum values sound cool for me too

[Mateuszpietrusinski]

Maybe its better to load that onSSR, this will verify quicker if user has access to this page

[Baroshem]

I tried to put it in onSSRc lifecycle hook at first but it did not work. Now when you have already filled the customer step data and you are in other step (like shipping) when you come back to customer the data will be filled for you.