Store `User` instances using their events.

1 files changed, 20 insertions, 2 deletions

diff --git a/src/user/history.rs b/src/user/history.rs
index f58e9c7..7c06a2d 100644
--- a/src/user/history.rs
+++ b/src/user/history.rs
@@ -2,7 +2,10 @@ use super::{
     User,
     event::{Created, Event},
 };
-use crate::event::{Instant, Sequence};
+use crate::{
+    event::{Instant, Sequence},
+    login::Login,
+};
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct History {
@@ -10,6 +13,21 @@ pub struct History {
     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>
@@ -32,7 +50,7 @@ impl History {
         .into()
     }
 
-    pub fn events(&self) -> impl Iterator<Item = Event> + use<> {
+    pub fn events(&self) -> impl Iterator<Item = Event> + Clone + use<> {
         [self.created()].into_iter()
     }
 }