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|
use super::{
User,
event::{Created, Event},
};
use crate::{
event::{Instant, Sequence},
login::Login,
};
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct History {
pub user: User,
pub created: Instant,
}
// Lifecycle interface
impl History {
pub fn begin(login: &Login, created: Instant) -> Self {
let Login { id, name } = login.clone();
Self {
user: User {
id: id.into(),
name,
},
created,
}
}
}
// State interface
impl History {
pub fn as_of<S>(&self, sequence: S) -> Option<User>
where
S: Into<Sequence>,
{
self.events()
.filter(Sequence::up_to(sequence.into()))
.collect()
}
}
// Events interface
impl History {
fn created(&self) -> Event {
Created {
instant: self.created,
user: self.user.clone(),
}
.into()
}
pub fn events(&self) -> impl Iterator<Item = Event> + Clone + use<> {
[self.created()].into_iter()
}
}
|
