add sync server module

packages/turso-sync/src/sync_server/mod.rs

@@ -0,0 +1,46 @@
+use crate::Result;
+
+#[cfg(test)]
+pub mod test;
+pub mod turso;
+
+#[derive(Debug, serde::Deserialize)]
+pub struct DbSyncInfo {
+    pub current_generation: usize,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct DbSyncStatus {
+    pub baton: Option<String>,
+    pub status: String,
+    pub generation: usize,
+    pub max_frame_no: usize,
+}
+
+pub trait Stream {
+    fn read_chunk(
+        &mut self,
+    ) -> impl std::future::Future<Output = Result<Option<hyper::body::Bytes>>> + Send;
+}
+
+pub trait SyncServer {
+    type Stream: Stream;
+    fn db_info(&self) -> impl std::future::Future<Output = Result<DbSyncInfo>> + Send;
+    fn db_export(
+        &self,
+        generation_id: usize,
+    ) -> impl std::future::Future<Output = Result<Self::Stream>> + Send;
+    fn wal_pull(
+        &self,
+        generation_id: usize,
+        start_frame: usize,
+    ) -> impl std::future::Future<Output = Result<Self::Stream>> + Send;
+    fn wal_push(
+        &self,
+        baton: Option<String>,
+        generation_id: usize,
+        start_frame: usize,
+        end_frame: usize,
+        frames: Vec<u8>,
+    ) -> impl std::future::Future<Output = Result<DbSyncStatus>> + Send;
+}