policer: Use status instead of bool value in node cache

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/services/policer/nodecache.go

@@ -15,37 +15,30 @@ func (st nodeProcessStatus) Processed() bool {
 }
 
 // nodeCache tracks Policer's check progress.
-type nodeCache map[uint64]bool
+type nodeCache map[uint64]nodeProcessStatus
 
 func newNodeCache() nodeCache {
-	return make(map[uint64]bool)
+	return make(map[uint64]nodeProcessStatus)
 }
 
-func (n nodeCache) set(node netmap.NodeInfo, val bool) {
+func (n nodeCache) set(node netmap.NodeInfo, val nodeProcessStatus) {
 	n[node.Hash()] = val
 }
 
 // submits storage node as a candidate to store the object replica in case of
 // shortage.
 func (n nodeCache) submitReplicaCandidate(node netmap.NodeInfo) {
-	n.set(node, false)
+	n.set(node, nodeDoesNotHoldObject)
 }
 
 // submits storage node as a current object replica holder.
 func (n nodeCache) submitReplicaHolder(node netmap.NodeInfo) {
-	n.set(node, true)
+	n.set(node, nodeHoldsObject)
 }
 
 // processStatus returns current processing status of the storage node.
 func (n nodeCache) processStatus(node netmap.NodeInfo) nodeProcessStatus {
-	switch val, ok := n[node.Hash()]; {
-	case !ok:
-		return nodeNotProcessed
-	case val:
-		return nodeHoldsObject
-	default:
-		return nodeDoesNotHoldObject
-	}
+	return n[node.Hash()]
 }
 
 // SubmitSuccessfulReplication marks given storage node as a current object