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|
use super::{
event::{Created, Event},
Id, Login,
};
use crate::event::{Instant, Sequence};
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct History {
pub login: Login,
pub created: Instant,
}
// State interface
impl History {
pub fn id(&self) -> &Id {
&self.login.id
}
// Snapshot of this login as it was when created. (Note to the future: it's okay
// if this returns a redacted or modified version of the login. If we implement
// renames by redacting the original name, then this should return the edited
// login, not the original, even if that's not how it was "as created.")
pub fn as_created(&self) -> Login {
self.login.clone()
}
pub fn as_of(&self, resume_point: Sequence) -> Option<Login> {
self.events()
.filter(Sequence::up_to(resume_point))
.collect()
}
// Snapshot of this login, as of all events recorded in this history.
pub fn as_snapshot(&self) -> Option<Login> {
self.events().collect()
}
}
// Events interface
impl History {
fn created(&self) -> Event {
Created {
instant: self.created,
login: self.login.clone(),
}
.into()
}
pub fn events(&self) -> impl Iterator<Item = Event> {
[self.created()].into_iter()
}
}
|
