link

type ContextLogger interface {
	Debugf(ctx context.Context, format string, args ...interface{})
	Infof(ctx context.Context, format string, args ...interface{})
	Warningf(ctx context.Context, format string, args ...interface{})
	Errorf(ctx context.Context, format string, args ...interface{})
}

type LogLevel int

type Logger interface {
	Debugf(format string, args ...interface{})
	Infof(format string, args ...interface{})
	Warningf(format string, args ...interface{})
	Errorf(format string, args ...interface{})
	Fatalf(format string, args ...interface{})
}

type Service interface {
	// Identifier of the service, e.g. "github", "twitter".
	ID() string

	// Normalize the service user name.
	// For example, on Twitter, "@username" becomes "username" or "Gabriel"
	// becomes "gabriel".
	NormalizeName(name string) string

	// ValidateName validates the service user name.
	ValidateName(name string) error

	// NormalizeURLString normalizes an url string.
	NormalizeURLString(name string, urs string) (string, error)

	// ValidateURLString validates the URL string and returns where to find the
	// signed statement.
	// For example, on reddit ".json" is appended.
	ValidateURLString(name string, urs string) (string, error)

	// CheckContent returns data with statement.
	// For Twitter, Github there is no check since the user owns the URL location.
	// For Reddit, we need to verify the listing, author and subreddit and return only the listing text.
	CheckContent(name string, b []byte) ([]byte, error)
}