/*
 * SPDX-FileCopyrightText: 2013 Frank Reininghaus <frank78ac@googlemail.com>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#ifndef KDIRECTORYCONTENTSCOUNTERWORKER_H
#define KDIRECTORYCONTENTSCOUNTERWORKER_H

#include <QMetaType>
#include <QObject>

class QString;

class KDirectoryContentsCounterWorker : public QObject
{
    Q_OBJECT

public:
    enum Option {
        NoOptions = 0x0,
        CountHiddenFiles = 0x1,
        CountDirectoriesOnly = 0x2
    };
    Q_DECLARE_FLAGS(Options, Option)

    struct CountResult {
        /// number of elements in the directory
        int count;
        /// Recursive sum of the size of the directory content files and folders
        /// Calculation depends on DetailsModeSettings::recursiveDirectorySizeLimit
        long size;
    };

    explicit KDirectoryContentsCounterWorker(QObject* parent = nullptr);

    /**
     * Counts the items inside the directory \a path using the options
     * \a options.
     *
     * @return The number of items.
     */
    static CountResult subItemsCount(const QString& path, Options options);

signals:
    /**
     * Signals that the directory \a path contains \a count items and optionally the size of its content.
     */
    void result(const QString& path, int count, long size);

public slots:
    /**
     * Requests the number of items inside the directory \a path using the
     * options \a options. The result is announced via the signal \a result.
     */
    // Note that the full type name KDirectoryContentsCounterWorker::Options
    // is needed here. Just using 'Options' is OK for the compiler, but
    // confuses moc.
    void countDirectoryContents(const QString& path, KDirectoryContentsCounterWorker::Options options);
};

Q_DECLARE_METATYPE(KDirectoryContentsCounterWorker::Options)
Q_DECLARE_OPERATORS_FOR_FLAGS(KDirectoryContentsCounterWorker::Options)

#endif