package controllers

import (
	"context"

	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/cabana"
	"git.golem15.com/golem15/summercms/modules/cooler"
)

// purgeSiteCache registers one site-cache purge of kind and slug, sent by
// the framework's purger (site_cache.purge_url and purge_token) after the
// save transaction of ctx commits. Without a purge configured, or outside a
// save transaction, it does nothing. A purge never fails the save.
func purgeSiteCache(ctx context.Context, app func() *backpack.App, kind, slug string) {
	if app == nil {
		return
	}
	a := app()
	if a == nil {
		return
	}
	tx, ok := cabana.TxFromContext(ctx)
	if !ok {
		return
	}
	purger := cooler.SiteCacheFromApp(a)
	if purger == nil {
		return
	}
	cooler.PurgeSiteCacheAfterCommit(ctx, tx, purger, kind, slug)
}