add: method to get bucket by index id in corefdb

dalmdl/corefdb/bucket.go

@@ -1945,3 +1945,26 @@ func DeleteDataFromFDB(dbName string, indexID string, rs *gjson.Result, queries
 	}
 	return errList
 }
+
+// GetBucketByIndexID - return bucket by specified indexID
+func GetBucketByIndexID(dbName, indexID string) (Bucket, error) {
+	fdb, err := GetFDBInstance(dbName)
+	bucket := Bucket{}
+	if err != nil {
+		loggermdl.LogError("fdb instance not found for: ", dbName)
+		return bucket, err
+	}
+	index, ok := fdb.GetFDBIndex(indexID)
+	if !ok {
+		loggermdl.LogError("index not found: " + indexID)
+		return bucket, errormdl.Wrap("index not found: " + indexID)
+	}
+
+	bucketID := index.BucketSequence[len(index.BucketSequence)-1]
+	bucketPtr, ok := fdb.buckets[bucketID]
+	if !ok {
+		loggermdl.LogError("Bucket not found: " + bucketID)
+		return bucket, errormdl.Wrap("Bucket not found: " + bucketID)
+	}
+	return *bucketPtr, nil
+}