refactor(replication): move config contracts into crate (#4162)

crates/replication/src/rule.rs

@@ -0,0 +1,50 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::config::ObjectOpts;
+use s3s::dto::ReplicaModificationsStatus;
+use s3s::dto::ReplicationRule;
+
+pub trait ReplicationRuleExt {
+    fn prefix(&self) -> &str;
+    fn metadata_replicate(&self, obj: &ObjectOpts) -> bool;
+}
+
+impl ReplicationRuleExt for ReplicationRule {
+    fn prefix(&self) -> &str {
+        if let Some(filter) = &self.filter {
+            if let Some(prefix) = &filter.prefix {
+                prefix
+            } else if let Some(and) = &filter.and {
+                and.prefix.as_deref().unwrap_or("")
+            } else {
+                ""
+            }
+        } else {
+            ""
+        }
+    }
+
+    fn metadata_replicate(&self, obj: &ObjectOpts) -> bool {
+        if !obj.replica {
+            return true;
+        }
+
+        self.source_selection_criteria.as_ref().is_some_and(|s| {
+            s.replica_modifications
+                .clone()
+                .is_some_and(|r| r.status == ReplicaModificationsStatus::from_static(ReplicaModificationsStatus::ENABLED))
+        })
+    }
+}