ClientInstrumentModel.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_CLIENT_INSTRUMENT_MODEL_HPP
#define ORES_QT_CLIENT_INSTRUMENT_MODEL_HPP
 
#include <vector>
#include <QFutureWatcher>
#include <QAbstractTableModel>
#include "ores.qt/ClientManager.hpp"
#include "ores.qt/RecencyPulseManager.hpp"
#include "ores.qt/RecencyTracker.hpp"
#include "ores.logging/make_logger.hpp"
#include "ores.trading.api/domain/instrument.hpp"
 
namespace ores::qt {
 
class ClientInstrumentModel final : public QAbstractTableModel {
    Q_OBJECT
 
private:
    inline static std::string_view logger_name =
        "ores.qt.client_instrument_model";
 
    [[nodiscard]] static auto& lg() {
        using namespace ores::logging;
        static auto instance = make_logger(logger_name);
        return instance;
    }
 
public:
    enum Column {
        Id,
        TradeType,
        Notional,
        Currency,
        StartDate,
        MaturityDate,
        Version,
        ModifiedBy,
        RecordedAt,
        ColumnCount
    };
 
    explicit ClientInstrumentModel(ClientManager* clientManager,
                                   QObject* parent = nullptr);
    ~ClientInstrumentModel() override = default;
 
    // QAbstractTableModel interface
    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;
    QVariant headerData(int section, Qt::Orientation orientation,
        int role = Qt::DisplayRole) const override;
 
    void refresh();
 
    const trading::domain::instrument* getInstrument(int row) const;
 
    void load_page(std::uint32_t offset, std::uint32_t limit);
 
    std::uint32_t page_size() const { return page_size_; }
 
    void set_page_size(std::uint32_t size);
 
    std::uint32_t total_available_count() const { return total_available_count_; }
 
signals:
    void dataLoaded();
 
    void loadError(const QString& error_message, const QString& details = {});
 
private slots:
    void onInstrumentsLoaded();
    void onPulseStateChanged(bool isOn);
    void onPulsingComplete();
 
private:
    QVariant recency_foreground_color(const std::string& key) const;
 
    struct FetchResult {
        bool success;
        std::vector<trading::domain::instrument> instruments;
        std::uint32_t total_available_count;
        QString error_message;
        QString error_details;
    };
 
    void fetch_instruments(std::uint32_t offset, std::uint32_t limit);
 
    ClientManager* clientManager_;
    std::vector<trading::domain::instrument> instruments_;
    QFutureWatcher<FetchResult>* watcher_;
    std::uint32_t page_size_{100};
    std::uint32_t total_available_count_{0};
    bool is_fetching_{false};
 
    using InstrumentKeyExtractor = std::string(*)(const trading::domain::instrument&);
    RecencyTracker<trading::domain::instrument, InstrumentKeyExtractor> recencyTracker_;
    RecencyPulseManager* pulseManager_;
};
 
}
 
#endif