Change the format of custom ranking rules when importing v2 dumps

meilisearch-http/src/index_controller/mod.rs

@@ -439,3 +439,17 @@ pub async fn get_arc_ownership_blocking<T>(mut item: Arc<T>) -> T {
         }
     }
 }
+
+/// Parses the v1 version of the Asc ranking rules `asc(price)`and returns the field name.
+pub fn asc_ranking_rule(text: &str) -> Option<&str> {
+    text.split_once("asc(")
+        .and_then(|(_, tail)| tail.rsplit_once(")"))
+        .map(|(field, _)| field)
+}
+
+/// Parses the v1 version of the Desc ranking rules `asc(price)`and returns the field name.
+pub fn desc_ranking_rule(text: &str) -> Option<&str> {
+    text.split_once("desc(")
+        .and_then(|(_, tail)| tail.rsplit_once(")"))
+        .map(|(field, _)| field)
+}