[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.go

@@ -0,0 +1,33 @@
+package networkmap_pgsql
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5"
+	networkmapdb "github.com/netbirdio/netbird/management/internals/network_map_db"
+	"github.com/netbirdio/netbird/shared/management/networkmap"
+)
+
+const (
+	GetAccountZonesQuery = `
+	select zones.id as id, domain, not enable_search_domain as search_domain_disabled, distribution_groups,
+	r.name as record_name, r.type as record_type, 'IN' record_class, r.ttl as record_ttl, r.content as record_rdata
+	from zones
+	left join records as r on r.zone_id = zones.id
+	where zones.account_id=$1 and zones.enabled
+	`
+)
+
+func (pgc *PgStoreConn) GetAppliedZoneCandidates(ctx context.Context, accountId string) ([]networkmap.AppliedZoneCandidate, error) {
+	rows, err := pgc.Conn.Query(ctx, GetAccountZonesQuery, accountId)
+	if err != nil {
+		return nil, err
+	}
+
+	zones, err := pgx.CollectRows(rows, pgx.RowToStructByName[networkmapdb.Zone])
+	if err != nil {
+		return nil, err
+	}
+
+	return networkmapdb.ZonesToAppliedZoneCandidates(zones)
+}