//! IDs used for data objects and models.
//!
//! UUID is always unique; the numeric ID used as a fallback
//! is auto-incrementing, but some values may be skipped.
//!
//! It is better to treat both ID implementations as opaque.

#[cfg(feature = "uuid-ids")]
#[allow(non_camel_case_types)]
pub type ID = uuid::Uuid;

#[cfg(not(feature = "uuid-ids"))]
#[allow(non_camel_case_types)]
pub type ID = u32;

/// Something that has ID
pub trait HaveId {
    fn get_id(&self) -> ID;
}

#[cfg(feature = "uuid-ids")]
#[cfg(test)]
pub fn random_id() -> ID {
    ID::new_v4()
}

#[cfg(not(feature = "uuid-ids"))]
#[cfg(test)]
pub fn random_id() -> ID {
    use rand::Rng;
    rand::thread_rng().gen()
}