[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/policy.go

@@ -0,0 +1,34 @@
+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/nmdata"
+)
+
+const (
+	GetPoliciesQuery = `
+	select p.id, p.public_id, p.enabled, p.source_posture_checks, pr.enabled as rule_enabled, pr.action, pr.protocol, pr.bidirectional, 
+	pr.sources, pr.destinations, pr.source_resource, pr.destination_resource, pr.ports, pr.port_ranges,
+	pr.authorized_groups, pr.authorized_user
+	from policies as p
+	left join policy_rules as pr on p.id = pr.policy_id 
+	where account_id=$1
+	`
+)
+
+func (pgc *PgStoreConn) GetPolicies(ctx context.Context, accountId string) ([]nmdata.Policy, map[string]map[string]any, map[string]map[string]any, error) {
+	rows, err := pgc.Conn.Query(ctx, GetPoliciesQuery, accountId)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	policies, err := pgx.CollectRows(rows, pgx.RowToStructByName[networkmapdb.Policy])
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	return networkmapdb.ConvertToNmdataPolicy(policies)
+}