Use a heartbeat to allow the client to reconnect after network failures.

1 files changed, 13 insertions, 2 deletions

diff --git a/src/boot/mod.rs b/src/boot/mod.rs
index c52b088..122bd53 100644
--- a/src/boot/mod.rs
+++ b/src/boot/mod.rs
@@ -1,14 +1,25 @@
+use crate::{channel::Channel, event::Sequence, message::Message, user::User};
+use serde::Serialize;
+use std::time::Duration;
+
 pub mod app;
 mod routes;
 
-use crate::{channel::Channel, event::Sequence, message::Message, user::User};
-
 pub use self::routes::router;
 
 #[derive(serde::Serialize)]
 pub struct Snapshot {
     pub resume_point: Sequence,
+    #[serde(serialize_with = "as_seconds")]
+    pub heartbeat: Duration,
     pub users: Vec<User>,
     pub channels: Vec<Channel>,
     pub messages: Vec<Message>,
 }
+
+fn as_seconds<S>(duration: &Duration, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    duration.as_secs().serialize(serializer)
+}