api

type Authenticator interface {
	// API creates a GmailAPI instance from a token JSON file contents.
	//
	// If no token is available, AuthURL and CacheToken can be used to
	// obtain one.
	API(ctx context.Context, token io.Reader) (GmailAPI, error)

	// AuthURL returns the URL the user has to visit to authorize the
	// application and obtain an auth code.
	AuthURL() string
	// CacheToken creates and caches a token JSON file from an auth code.
	//
	// The token can be subsequently used to authorize a GmailAPI instance.
	CacheToken(ctx context.Context, authCode string, token io.Writer) error
}

type GmailAPI interface {
	ListFilters() (filter.Filters, error)
	DeleteFilters(ids []string) error
	AddFilters(fs filter.Filters) error

	ListLabels() ([]filter.Label, error)
	LabelMap() (exportapi.LabelMap, error)
}