[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/network.go

@@ -0,0 +1,39 @@
+package networkmap_pgsql
+
+import (
+	"context"
+	"reflect"
+
+	"github.com/jackc/pgx/v5"
+	networkmapdb "github.com/netbirdio/netbird/management/internals/network_map_db"
+	"github.com/netbirdio/netbird/shared/management/networkmap/nmdata"
+)
+
+const (
+	GetNetworkQuery = `
+	select network_identifier as identifier, network_net as net, network_net_v6 as net_v6, network_dns as dns, network_serial as serial
+	from accounts
+	where id=$1
+	`
+)
+
+func (pgc *PgStoreConn) GetNetwork(ctx context.Context, accountId string) (nmdata.Network, error) {
+	rows, err := pgc.Conn.Query(ctx, GetNetworkQuery, accountId)
+	if err != nil {
+		return nmdata.Network{}, err
+	}
+
+	n, err := pgx.CollectOneRow(rows, pgx.RowToStructByName[networkmapdb.AccountNetwork])
+	if err != nil {
+		return nmdata.Network{}, err
+	}
+
+	toret := nmdata.Network{}
+	err = networkmapdb.FromSqlTypesToSharedTypes(
+		reflect.ValueOf(&n), reflect.ValueOf(&toret))
+	if err != nil {
+		return nmdata.Network{}, err
+	}
+
+	return toret, nil
+}