OrgExplorerTreeModel.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * Copyright (C) 2026 Marco Craveiro <marco.craveiro@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */
#ifndef ORES_QT_ORG_EXPLORER_TREE_MODEL_HPP
#define ORES_QT_ORG_EXPLORER_TREE_MODEL_HPP
 
#include <cstdint>
#include <memory>
#include <vector>
#include <optional>
#include <unordered_map>
#include <QString>
#include <QAbstractItemModel>
#include <boost/uuid/uuid.hpp>
#include "ores.logging/make_logger.hpp"
#include "ores.refdata.api/domain/business_unit.hpp"
#include "ores.refdata.api/domain/book.hpp"
 
namespace ores::qt {
 
struct OrgTreeNodeFilter {
    std::optional<boost::uuids::uuid> book_id;
    std::optional<boost::uuids::uuid> business_unit_id;
};
 
struct OrgTreeNode {
    enum class Kind { Party, BusinessUnit, Book };
 
    Kind kind;
    QString party_name;                            // valid when kind == Party
    refdata::domain::business_unit unit;           // valid when kind == BusinessUnit
    refdata::domain::book book;                    // valid when kind == Book
    OrgTreeNode* parent = nullptr;
    std::vector<std::unique_ptr<OrgTreeNode>> children;
    int row_in_parent = 0;
};
 
class OrgExplorerTreeModel final : public QAbstractItemModel {
    Q_OBJECT
 
private:
    inline static std::string_view logger_name =
        "ores.qt.org_explorer_tree_model";
 
    [[nodiscard]] static auto& lg() {
        using namespace ores::logging;
        static auto instance = make_logger(logger_name);
        return instance;
    }
 
public:
    explicit OrgExplorerTreeModel(QObject* parent = nullptr);
    ~OrgExplorerTreeModel() override = default;
 
    void load(const QString& party_name,
              std::vector<refdata::domain::business_unit> units,
              std::vector<refdata::domain::book> books);
 
    OrgTreeNodeFilter selected_filter(const QModelIndex& index) const;
 
    void set_trade_count(const boost::uuids::uuid& book_id, std::uint32_t count);
 
    OrgTreeNode* node_from_index(const QModelIndex& index) const;
 
    // QAbstractItemModel interface
    QModelIndex index(int row, int col,
        const QModelIndex& parent = QModelIndex()) const override;
    QModelIndex parent(const QModelIndex& index) const override;
    int rowCount(const QModelIndex& parent = QModelIndex()) const override;
    int columnCount(const QModelIndex& parent = QModelIndex()) const override;
    QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
 
private:
    void build_unit_subtree(OrgTreeNode* parent_node,
        const std::vector<refdata::domain::business_unit>& units,
        const std::vector<refdata::domain::book>& books,
        const std::optional<boost::uuids::uuid>& parent_unit_id);
 
    QModelIndex find_book_index(const boost::uuids::uuid& id) const;
    std::uint32_t subtree_count(const OrgTreeNode* node) const;
 
    std::unique_ptr<OrgTreeNode> root_;
    std::unordered_map<std::string, std::uint32_t> trade_counts_;
};
 
}
 
#endif