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 /*
     SPDX-License-Identifier: LGPL-2.1-or-later OR MIT
     SPDX-FileCopyrightText: 2021 Andreas Cord-Landwehr <cordlandwehr@kde.org>
 */
 
 #ifndef JOURNALDUNIQUEQUERYMODEL_H
 #define JOURNALDUNIQUEQUERYMODEL_H
 
 #include "journaldhelper.h"
 #include "kjournald_export.h"
 #include <QAbstractItemModel>
 #include <memory>
 
 class JournaldUniqueQueryModelPrivate;
 
 /**
  * @brief The JournaldUniqueQueryModel class provides an item model abstraction for journald queryunique API
  *
  * This class is useful when creating a list model for contents like:
  * - boot ids in specific journal database
  * - systemd units in specific journal database
  * - priorities in specific journal database
  *
  * The model can be create from an arbitrary local journald database by defining a path or from the
  * system's default journal. Values can either be set by @a setFieldString for arbitrary values or in a
  * typesafe manner via @a setField for most common fields.
  */
 class KJOURNALD_EXPORT JournaldUniqueQueryModel : public QAbstractItemModel
 {
     Q_OBJECT
     Q_PROPERTY(QString journalPath WRITE setJournaldPath RESET setSystemJournal)
     Q_PROPERTY(QString field WRITE setFieldString)
 
 public:
     enum Roles {
         FIELD = Qt::UserRole + 1,
         SELECTED, //!< supports UI integration by storing checked
     };
     Q_ENUM(Roles)
 
     explicit JournaldUniqueQueryModel(QObject *parent = nullptr);
 
     /**
      * @brief Create model from a specific journal database
      *
      * This constructor works similar to "journalctl -D" and allows to use a custom path to the
      * journald database.
      *
      * @param journalPath path to the journald database
      * @param parent the QObject parent
      */
     JournaldUniqueQueryModel(const QString &journalPath, QObject *parent = nullptr);
 
     /**
      * @brief Destroys the JournaldUniqueQueryModel object
      */
     ~JournaldUniqueQueryModel() override;
 
     /**
      * Reset model by reading from a new journald database
      *
      * @param path The path to directory that obtains the journald DB, usually ending with "journal".
      * @return true if path could be found and opened, otherwise false
      */
     bool setJournaldPath(const QString &path);
 
     /**
      * Switch to local system's default journald database
      *
      * For details regarding preference, see journald documentation.
      */
     void setSystemJournal();
 
     /**
      * Set field for which unique query shall be run
      *
      * This method allows defining an arbitrary string as query string. The most common fields are available
      * by type-safe @a setField setter. Examples for the argument are "_SYSTEMD_UNIT", "PRIORITY", "_BOOT_ID".
      *
      * @param fieldString the string that names the field
      */
     void setFieldString(const QString &fieldString);
 
     /**
      * Set field for which unique query shall be run
      *
      * @param field enum for field for which query shall be run
      */
     void setField(JournaldHelper::Field field);
 
     /**
      * @return the currently set field string
      */
     QString fieldString() const;
 
     /**
      * @copydoc QAbstractItemModel::rolesNames()
      */
     QHash<int, QByteArray> roleNames() const override;
 
     /**
      * @copydoc QAbstractItemModel::index()
      */
     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
 
     /**
      * @copydoc QAbstractItemModel::parent()
      */
     QModelIndex parent(const QModelIndex &index) const override;
 
     /**
      * @copydoc QAbstractItemModel::rowCount()
      */
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 
     /**
      * @copydoc QAbstractItemModel::columnCount()
      */
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
 
     /**
      * @copydoc QAbstractItemModel::data()
      */
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
 
     /**
      * @copydoc QAbstractItemModel::setData()
      */
     Q_INVOKABLE bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
 
 private:
     std::unique_ptr<JournaldUniqueQueryModelPrivate> d;
 };
 
 #endif // JOURNALDUNIQUEQUERYMODEL_H