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// SPDX-License-Identifier: GPL-3.0-only
/*
 *  PolyMC - Minecraft Launcher
 *  Copyright (C) 2022 Kenneth Chew <kenneth.c0@protonmail.com>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef LAUNCHER_SPARKLEUPDATER_H
#define LAUNCHER_SPARKLEUPDATER_H

#include <QObject>
#include <QSet>

class SparkleUpdater : public QObject
{
    Q_OBJECT

public:
    /*!
     * Start the Sparkle updater, which automatically checks for updates if necessary.
     */
    SparkleUpdater();
    ~SparkleUpdater();

    /*!
     * Check for updates manually, showing the user a progress bar and an alert if no updates are found.
     */
    void checkForUpdates();

    /*!
     * Indicates whether or not to check for updates automatically.
     */
    bool getAutomaticallyChecksForUpdates();

    /*!
     * Indicates the current automatic update check interval in seconds.
     */
    double getUpdateCheckInterval();

    /*!
     * Indicates the set of Sparkle channels the updater is allowed to find new updates from.
     */
    QSet<QString> getAllowedChannels();

    /*!
     * Set whether or not to check for updates automatically.
     *
     * As per Sparkle documentation, "By default, Sparkle asks users on second launch for permission if they want
     * automatic update checks enabled and sets this property based on their response. If SUEnableAutomaticChecks is
     * set in the Info.plist, this permission request is not performed however.
     *
     * Setting this property will persist in the host bundle’s user defaults. Only set this property if you need
     * dynamic behavior (e.g. user preferences).
     *
     * The update schedule cycle will be reset in a short delay after the property’s new value is set. This is to allow
     * reverting this property without kicking off a schedule change immediately."
     */
    void setAutomaticallyChecksForUpdates(bool check);

    /*!
     * Set the current automatic update check interval in seconds.
     *
     * As per Sparkle documentation, "Setting this property will persist in the host bundle’s user defaults. For this
     * reason, only set this property if you need dynamic behavior (eg user preferences). Otherwise prefer to set
     * SUScheduledCheckInterval directly in your Info.plist.
     *
     * The update schedule cycle will be reset in a short delay after the property’s new value is set. This is to allow
     * reverting this property without kicking off a schedule change immediately."
     */
    void setUpdateCheckInterval(double seconds);

    /*!
     * Clears all allowed Sparkle channels, returning to the default updater channel behavior.
     */
    void clearAllowedChannels();

    /*!
     * Set a single Sparkle channel the updater is allowed to find new updates from.
     *
     * Items in the default channel can always be found, regardless of this setting. If an empty string is passed,
     * return to the default behavior.
     */
    void setAllowedChannel(const QString& channel);

    /*!
     * Set a set of Sparkle channels the updater is allowed to find new updates from.
     *
     * Items in the default channel can always be found, regardless of this setting. If an empty set is passed,
     * return to the default behavior.
     */
    void setAllowedChannels(const QSet<QString>& channels);

signals:
    /*!
     * Emits whenever the user's ability to check for updates changes.
     *
     * As per Sparkle documentation, "An update check can be made by the user when an update session isn’t in progress,
     * or when an update or its progress is being shown to the user. A user cannot check for updates when data (such
     * as the feed or an update) is still being downloaded automatically in the background.
     *
     * This property is suitable to use for menu item validation for seeing if checkForUpdates can be invoked."
     */
    void canCheckForUpdatesChanged(bool canCheck);

private:
    class Private;

    Private* priv;

    void loadChannelsFromSettings();
};

#endif //LAUNCHER_SPARKLEUPDATER_H