store

type DB interface {
	ListFeeds(page, limit int) (*app.FeedCollection, error)
	ExistsFeed(url string) bool
	GetFeed(id string) (*app.Feed, error)
	DeleteFeed(id string) (*app.Feed, error)
	SaveFeed(feed *app.Feed) error
	ForEachFeed(cb func(*app.Feed) error) error
	GetFromCache(key string) (*model.CacheItem, error)
	StoreToCache(key string, item *model.CacheItem) error
	ClearCache() error
	EvictFromCache(before time.Time) error
	Close() error
}