service

type Location struct {
	Lat string `json:"lat"`
	Lon string `json:"lon"`
}

type SensorMetadata struct {
	ID       string    `json:"id,omitempty"`
	Name     string    `json:"name"`
	Location *Location `json:"location,omitempty"`
	Tags     []string  `json:"tags"`
}

type SensorMetadataService interface {
	FindByName(ctx context.Context, name string) (sensor *SensorMetadata, err error)
	FindByID(ctx context.Context, id string) (sensor *SensorMetadata, err error)
	Add(ctx context.Context, sensor SensorMetadata) (id string, err error)
	Update(ctx context.Context, sensor SensorMetadata) (err error)
	Delete(ctx context.Context, id string) (err error)
	FindNearest(ctx context.Context, lat, lon string) (sensor *SensorMetadata, err error)
}