/*
    SPDX-FileCopyrightText: 2006-2008 Tobias Koenig <tokoe@kde.org>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#ifndef AKONADI_AGENTINSTANCEMODEL_H
#define AKONADI_AGENTINSTANCEMODEL_H

#include "akonadicore_export.h"

#include <QAbstractItemModel>

namespace Akonadi
{

/**
 * @short Provides a data model for agent instances.
 *
 * This class provides the interface of a QAbstractItemModel to
 * access all available agent instances: their name, identifier,
 * supported mimetypes and capabilities.
 *
 * @code
 *
 * Akonadi::AgentInstanceModel *model = new Akonadi::AgentInstanceModel( this );
 *
 * QListView *view = new QListView( this );
 * view->setModel( model );
 *
 * @endcode
 *
 * To show only agent instances that match a given mime type or special
 * capabilities, use the AgentFilterProxyModel on top of this model.
 *
 * @author Tobias Koenig <tokoe@kde.org>
 */
class AKONADICORE_EXPORT AgentInstanceModel : public QAbstractItemModel
{
    Q_OBJECT

public:
    /**
     * Describes the roles of this model.
     */
    enum Roles {
        TypeRole = Qt::UserRole + 1,             ///< The agent type itself
        TypeIdentifierRole,                      ///< The identifier of the agent type
        DescriptionRole,                         ///< A description of the agent type
        MimeTypesRole,                           ///< A list of supported mimetypes
        CapabilitiesRole,                        ///< A list of supported capabilities
        InstanceRole,                            ///< The agent instance itself
        InstanceIdentifierRole,                  ///< The identifier of the agent instance
        StatusRole,                              ///< The current status (numerical) of the instance
        StatusMessageRole,                       ///< A textual presentation of the current status
        ProgressRole,                            ///< The current progress (numerical in percent) of an operation
        OnlineRole,                              ///< The current online/offline status
        UserRole  = Qt::UserRole + 42            ///< Role for user extensions
    };

    /**
     * Creates a new agent instance model.
     *
     * @param parent The parent object.
     */
    explicit AgentInstanceModel(QObject *parent = nullptr);

    /**
     * Destroys the agent instance model.
     */
    ~AgentInstanceModel() override;

    Q_REQUIRED_RESULT QHash<int, QByteArray> roleNames() const override;
    Q_REQUIRED_RESULT int columnCount(const QModelIndex &parent = QModelIndex()) const override;
    Q_REQUIRED_RESULT int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    Q_REQUIRED_RESULT QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    Q_REQUIRED_RESULT QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
    Q_REQUIRED_RESULT QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
    Q_REQUIRED_RESULT QModelIndex parent(const QModelIndex &index) const override;
    Q_REQUIRED_RESULT Qt::ItemFlags flags(const QModelIndex &index) const override;
    Q_REQUIRED_RESULT bool setData(const QModelIndex &index, const QVariant &value, int role) override;

private:
    //@cond PRIVATE
    class Private;
    Private *const d;
    //@endcond
};

}

#endif
