feed

type Block struct {
	Low  int // start index (inclusive)
	High int // end index (exclusive)
}

type Feed <-chan *Item

type Fetcher interface {
	// Fetch retrieves items from the feed.
	Fetch() ([]*Item, error)
}

type Item struct {
	Title     string     // Title of the item.
	Updated   *time.Time // When the item was updated.
	Published *time.Time // When the item was published.
}

type Subscription interface {
	// Feed generates a stream of feed items. It returns an error if it fails to
	// create a stream.
	Feed() (Feed, error)
	// Close stops the subscription and closes the feed.
	Close() error
}