Represent channels and messages using a split "History" and "Snapshot" model.

This separates the code that figures out what happened to an entity from the code that represents it to a user, and makes it easier to compute a snapshot at a point in time (for things like bootstrap). It also makes the internal logic a bit easier to follow, since it's easier to tell whether you're working with a point in time or with the whole recorded history.

This hefty.

1 files changed, 0 insertions, 50 deletions

diff --git a/src/event/repo/sequence.rs b/src/event/repo/sequence.rs
deleted file mode 100644
index 40d6a53..0000000
--- a/src/event/repo/sequence.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
-
-use crate::{
-    clock::DateTime,
-    event::{Instant, Sequence},
-};
-
-pub trait Provider {
-    fn sequence(&mut self) -> Sequences;
-}
-
-impl<'c> Provider for Transaction<'c, Sqlite> {
-    fn sequence(&mut self) -> Sequences {
-        Sequences(self)
-    }
-}
-
-pub struct Sequences<'t>(&'t mut SqliteConnection);
-
-impl<'c> Sequences<'c> {
-    pub async fn next(&mut self, at: &DateTime) -> Result<Instant, sqlx::Error> {
-        let next = sqlx::query_scalar!(
-            r#"
-                update event_sequence
-                set last_value = last_value + 1
-                returning last_value as "next_value: Sequence"
-            "#,
-        )
-        .fetch_one(&mut *self.0)
-        .await?;
-
-        Ok(Instant {
-            at: *at,
-            sequence: next,
-        })
-    }
-
-    pub async fn current(&mut self) -> Result<Sequence, sqlx::Error> {
-        let next = sqlx::query_scalar!(
-            r#"
-                select last_value as "last_value: Sequence"
-                from event_sequence
-            "#,
-        )
-        .fetch_one(&mut *self.0)
-        .await?;
-
-        Ok(next)
-    }
-}