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/* Copyright 2015 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <QList>
#include <QString>
#include <QDir>
#include <QAbstractListModel>
#include "minecraft/World.h"

class QFileSystemWatcher;

class WorldList : public QAbstractListModel
{
    Q_OBJECT
public:
    enum Columns {
        NameColumn
    };

    WorldList ( const QString &dir );

    virtual QVariant data ( const QModelIndex &index, int role = Qt::DisplayRole ) const;

    virtual int rowCount ( const QModelIndex &parent = QModelIndex() ) const {
        return size();
    }
    ;
    virtual QVariant headerData ( int section, Qt::Orientation orientation,
                                  int role = Qt::DisplayRole ) const;
    virtual int columnCount ( const QModelIndex &parent ) const;

    size_t size() const {
        return worlds.size();
    }
    ;
    bool empty() const {
        return size() == 0;
    }
    World &operator[] ( size_t index ) {
        return worlds[index];
    }

    /// Reloads the mod list and returns true if the list changed.
    virtual bool update();

    /// Deletes the mod at the given index.
    virtual bool deleteWorld ( int index );

    /// Deletes all the selected mods
    virtual bool deleteWorlds ( int first, int last );

    /// get data for drag action
    virtual QMimeData *mimeData ( const QModelIndexList &indexes ) const;
    /// get the supported mime types
    virtual QStringList mimeTypes() const;

    void startWatching();
    void stopWatching();

    virtual bool isValid();

    QDir dir() {
        return m_dir;
    }

    const QList<World> & allWorlds() {
        return worlds;
    }

private:
    void internalSort ( QList<World> & what );
    private
slots:
    void directoryChanged ( QString path );

signals:
    void changed();

protected:
    QFileSystemWatcher *m_watcher;
    bool is_watching;
    QDir m_dir;
    QList<World> worlds;
};