From ce89d1ddabe3b9e638b0173949726522ae9a0311 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Sat, 11 Nov 2023 12:08:32 +0100
Subject: table sync: adapt to new layout history

---
 src/table/replication/sharded.rs | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

(limited to 'src/table/replication/sharded.rs')

diff --git a/src/table/replication/sharded.rs b/src/table/replication/sharded.rs
index 793d87fd..f02b1d66 100644
--- a/src/table/replication/sharded.rs
+++ b/src/table/replication/sharded.rs
@@ -51,7 +51,42 @@ impl TableReplication for TableShardedReplication {
 	fn partition_of(&self, hash: &Hash) -> Partition {
 		self.system.cluster_layout().current().partition_of(hash)
 	}
-	fn partitions(&self) -> Vec<(Partition, Hash)> {
-		self.system.cluster_layout().current().partitions()
+
+	fn sync_partitions(&self) -> SyncPartitions {
+		let layout = self.system.cluster_layout();
+		let layout_version = layout.all_ack();
+
+		let mut partitions = layout
+			.current()
+			.partitions()
+			.map(|(partition, first_hash)| {
+				let mut storage_nodes = layout
+					.write_sets_of(&first_hash)
+					.map(|x| x.into_iter())
+					.flatten()
+					.collect::<Vec<_>>();
+				storage_nodes.sort();
+				storage_nodes.dedup();
+				SyncPartition {
+					partition,
+					first_hash,
+					last_hash: [0u8; 32].into(), // filled in just after
+					storage_nodes,
+				}
+			})
+			.collect::<Vec<_>>();
+
+		for i in 0..partitions.len() {
+			partitions[i].last_hash = if i + 1 < partitions.len() {
+				partitions[i + 1].first_hash
+			} else {
+				[0xFFu8; 32].into()
+			};
+		}
+
+		SyncPartitions {
+			layout_version,
+			partitions,
+		}
 	}
 }
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