networkmap read-only interface for pgsql

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

management/internals/network_map_db/pgsql/group.go

@@ -0,0 +1,53 @@
+package networkmap_pgsql
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/netbirdio/netbird/shared/management/networkmap/nmdata"
+)
+
+const (
+	GetGroupsQuery = `
+	select name, public_id, resources from groups where account_id=$1
+	`
+)
+
+func (pg *PgStore) GetGroups(ctx context.Context, accountId string) ([]nmdata.Group, error) {
+	rows, err := pg.pool.Query(ctx, GetGroupsQuery, accountId)
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		group                     nmdata.Group
+		name, publicId, resources sql.NullString
+	)
+
+	groups, err := pgx.CollectRows(rows, func(row pgx.CollectableRow) (nmdata.Group, error) {
+		err := row.Scan(&name, &publicId, &resources)
+		if err != nil {
+			return group, err
+		}
+
+		if name.Valid {
+			group.Name = name.String
+		}
+		if publicId.Valid {
+			group.PublicID = publicId.String
+		}
+		if resources.Valid {
+			groupResources := make([]nmdata.Resource, 0)
+			err := json.Unmarshal([]byte(resources.String), &groupResources)
+			if err != nil {
+				return group, err
+			}
+			group.Resources = groupResources
+		}
+		return group, nil
+	})
+
+	return groups, err
+}