1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
use super::{
event::{Event, Sent},
Id,
};
use crate::{channel, clock::DateTime, event::Instant, login};
#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
pub struct Message {
#[serde(flatten)]
pub sent: Instant,
pub channel: channel::Id,
pub sender: login::Id,
pub id: Id,
pub body: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub deleted_at: Option<DateTime>,
}
impl Message {
fn apply(state: Option<Self>, event: Event) -> Option<Self> {
match (state, event) {
(None, Event::Sent(event)) => Some(event.into()),
(Some(message), Event::Deleted(event)) if message.id == event.id => None,
(state, event) => panic!("invalid message event {event:#?} for state {state:#?}"),
}
}
}
impl FromIterator<Event> for Option<Message> {
fn from_iter<I: IntoIterator<Item = Event>>(events: I) -> Self {
events.into_iter().fold(None, Message::apply)
}
}
impl From<&Sent> for Message {
fn from(event: &Sent) -> Self {
event.message.clone()
}
}
impl From<Sent> for Message {
fn from(event: Sent) -> Self {
event.message
}
}
|
