[management] network map from nmap data type (#6919)

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>
Co-authored-by: Dmitri Dolguikh <dmitri.external@netbird.io>

management/internals/network_map_db/pgsql/dns_settings.go

@@ -0,0 +1,45 @@
+package networkmap_pgsql
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/netbirdio/netbird/shared/management/networkmap/nmdata"
+)
+
+const (
+	GetDnsSettingsQuery = `
+	select dns_settings_disabled_management_groups
+	from accounts
+	where id=$1
+	`
+)
+
+func (pgc *PgStoreConn) GetDnsSettings(ctx context.Context, accountId string) (nmdata.DNSSettings, error) {
+	rows, err := pgc.Conn.Query(ctx, GetDnsSettingsQuery, accountId)
+	if err != nil {
+		return nmdata.DNSSettings{}, err
+	}
+
+	return pgx.CollectOneRow(rows, rowToDnsSettings)
+}
+
+func rowToDnsSettings(row pgx.CollectableRow) (nmdata.DNSSettings, error) {
+	var value nmdata.DNSSettings
+	var settings json.RawMessage
+
+	if err := row.Scan(&settings); err != nil {
+		return value, err
+	}
+
+	if settings == nil {
+		return nmdata.DNSSettings{}, nil
+	}
+
+	if err := json.Unmarshal(settings, &value.DisabledManagementGroups); err != nil {
+		return value, err
+	}
+
+	return value, nil
+}