[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/networks.go

@@ -0,0 +1,36 @@
+package networkmap_pgsql
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5"
+	networkmapdb "github.com/netbirdio/netbird/management/internals/network_map_db"
+)
+
+const (
+	GetNetworksQuery = `
+	select id, public_id
+	from networks where account_id=$1
+	`
+)
+
+func (pgc *PgStoreConn) GetNetworkXIDToPublicIdMap(ctx context.Context, accountId string) (map[string]string, error) {
+	rows, err := pgc.Conn.Query(ctx, GetNetworksQuery, accountId)
+	if err != nil {
+		return nil, err
+	}
+
+	networks, err := pgx.CollectRows(rows, pgx.RowToStructByName[networkmapdb.Network])
+	if err != nil {
+		return nil, err
+	}
+
+	toret := make(map[string]string)
+	for _, n := range networks {
+		if n.PublicID.Valid {
+			toret[n.ID] = n.PublicID.String
+		}
+	}
+
+	return toret, nil
+}