[management] move network map logic into new design (#4774)

management/internals/controllers/network_map/controller/cache/dns_config_cache.go

@@ -0,0 +1,31 @@
+package cache
+
+import (
+	"sync"
+
+	"github.com/netbirdio/netbird/shared/management/proto"
+)
+
+// DNSConfigCache is a thread-safe cache for DNS configuration components
+type DNSConfigCache struct {
+	NameServerGroups sync.Map
+}
+
+// GetNameServerGroup retrieves a cached name server group
+func (c *DNSConfigCache) GetNameServerGroup(key string) (*proto.NameServerGroup, bool) {
+	if c == nil {
+		return nil, false
+	}
+	if value, ok := c.NameServerGroups.Load(key); ok {
+		return value.(*proto.NameServerGroup), true
+	}
+	return nil, false
+}
+
+// SetNameServerGroup stores a name server group in the cache
+func (c *DNSConfigCache) SetNameServerGroup(key string, value *proto.NameServerGroup) {
+	if c == nil {
+		return
+	}
+	c.NameServerGroups.Store(key, value)
+}