DbServiceableMixin.hpp

#ifndef H_EXTENSIONS_CUTEHMI_DATAACQUISITION_1_INCLUDE_CUTEHMI_DATAACQUISITION_INTERNAL_DBSERVICEABLEMIXIN_HPP
#define H_EXTENSIONS_CUTEHMI_DATAACQUISITION_1_INCLUDE_CUTEHMI_DATAACQUISITION_INTERNAL_DBSERVICEABLEMIXIN_HPP
 
#include <cutehmi/services/Serviceable.hpp>
 
#include <cutehmi/shareddatabase/Database.hpp>
 
#include <QState>
#include <QTimer>
 
namespace cutehmi {
namespace dataacquisition {
namespace internal {
 
template <class DERIVED>
class DbServiceableMixin
{
    protected:
        QState * createWaitingForDatabaseConnectedSate(QState * parent, services::Serviceable::AssignStatusFunction assignStatus, QState * target = nullptr);
 
        QState * createValidatingSchemaSate(QState * parent, services::Serviceable::AssignStatusFunction assignStatus, QState * target = nullptr);
 
    private:
        const DERIVED & derived() const;
 
        DERIVED & derived();
};
 
template <typename DERIVED>
QState * DbServiceableMixin<DERIVED>::createWaitingForDatabaseConnectedSate(QState * parent, services::Serviceable::AssignStatusFunction assignStatus, QState * target)
{
    QState * state = new QState(parent);
    QObject::connect(state, & QState::entered, & derived(), [this, state]() {
        if (derived().schema()) {
            QTimer * timer = new QTimer(derived().schema());
            QObject::connect(timer, & QTimer::timeout, [this]() {
                if (shareddatabase::Database::IsConnected(derived().schema()->connectionName()))
                    emit derived().databaseConnected();
            });
            QObject::connect(state, & QState::exited, timer, & QTimer::stop);
            QObject::connect(state, & QState::exited, timer, & QObject::deleteLater);
            timer->start(250);
        } else {
            CUTEHMI_CRITICAL("Schema is not set for '" << this << "' object.");
            emit derived().broke();
        }
    });
 
    assignStatus(*state, QCoreApplication::translate("cutehmi::dataacquisition::internal::DbServiceableMixin", "Waiting for database"));
 
    if (target)
        state->addTransition(& derived(), & DERIVED::databaseConnected, target);
 
    return state;
}
 
template <typename DERIVED>
QState * DbServiceableMixin<DERIVED>::createValidatingSchemaSate(QState * parent, services::Serviceable::AssignStatusFunction assignStatus, QState * target)
{
    QState * state = new QState(parent);
    QObject::connect(state, & QState::entered, & derived(), [this]() {
        if (!derived().schema()) {
            CUTEHMI_CRITICAL("Schema is not set for '" << this << "' object.");
            emit derived().broke();
        } else
            derived().schema()->validate();
    });
 
    assignStatus(*state, QCoreApplication::translate("cutehmi::dataacquisition::internal::DbServiceableMixin", "Validating schema"));
 
    if (target)
        state->addTransition(& derived(), & DERIVED::schemaValidated, target);
 
    return state;
}
 
template <typename DERIVED>
const DERIVED & DbServiceableMixin<DERIVED>::derived() const
{
    return static_cast<const DERIVED &>(*this);
}
 
template <typename DERIVED>
DERIVED & DbServiceableMixin<DERIVED>::derived()
{
    return static_cast<DERIVED &>(*this);
}
 
}
}
}
 
#endif
 
//(c)C: Copyright © 2022, Michał Policht <michal@policht.pl>. All rights reserved.
//(c)C: SPDX-License-Identifier: LGPL-3.0-or-later OR MIT
//(c)C: This file is a part of CuteHMI.
//(c)C: CuteHMI is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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//(c)C: You should have received a copy of the GNU Lesser General Public License along with CuteHMI.  If not, see <https://www.gnu.org/licenses/>.
//(c)C: Additionally, this file is licensed under terms of MIT license as expressed below.
//(c)C: Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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