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use super::{
event::{Created, Event},
Id, Name,
};
use crate::clock::DateTime;
#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
pub struct Channel {
pub id: Id,
pub name: Name,
#[serde(skip_serializing_if = "Option::is_none")]
pub deleted_at: Option<DateTime>,
}
impl Channel {
fn apply(state: Option<Self>, event: Event) -> Option<Self> {
match (state, event) {
(None, Event::Created(event)) => Some(event.into()),
(Some(channel), Event::Deleted(event)) if channel.id == event.id => None,
(state, event) => panic!("invalid channel event {event:#?} for state {state:#?}"),
}
}
}
impl FromIterator<Event> for Option<Channel> {
fn from_iter<I: IntoIterator<Item = Event>>(events: I) -> Self {
events.into_iter().fold(None, Channel::apply)
}
}
impl From<&Created> for Channel {
fn from(event: &Created) -> Self {
event.channel.clone()
}
}
impl From<Created> for Channel {
fn from(event: Created) -> Self {
event.channel
}
}
|
