From 7b6673dc1d8d9ef6461748b2540c846c62e77793 Mon Sep 17 00:00:00 2001
From: Tamo <tamo@meilisearch.com>
Date: Wed, 14 Sep 2022 12:58:48 +0200
Subject: [PATCH] implement the index swap in the index mapper

---
 index-scheduler/src/index_mapper.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/index-scheduler/src/index_mapper.rs b/index-scheduler/src/index_mapper.rs
index b314ee861..43d72b51d 100644
--- a/index-scheduler/src/index_mapper.rs
+++ b/index-scheduler/src/index_mapper.rs
@@ -88,4 +88,21 @@ impl IndexMapper {
 
         Ok(index)
     }
+
+    /// Swap two index name.
+    pub fn swap(&self, wtxn: &mut RwTxn, lhs: &str, rhs: &str) -> Result<()> {
+        let lhs_uuid = self
+            .index_mapping
+            .get(wtxn, lhs)?
+            .ok_or(Error::IndexNotFound(lhs.to_string()))?;
+        let rhs_uuid = self
+            .index_mapping
+            .get(wtxn, rhs)?
+            .ok_or(Error::IndexNotFound(rhs.to_string()))?;
+
+        self.index_mapping.put(wtxn, lhs, &rhs_uuid)?;
+        self.index_mapping.put(wtxn, rhs, &lhs_uuid)?;
+
+        Ok(())
+    }
 }