/*
 * Copyright (C) by Roeland Jago Douma <roeland@famdouma.nl>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 */


#ifndef CAPABILITIES_H
#define CAPABILITIES_H

#include "owncloudlib.h"

#include <QVariantMap>
#include <QStringList>
#include <QMimeDatabase>

namespace OCC {

class DirectEditor;

enum PushNotificationType {
    None = 0,
    Files = 1,
    Activities = 2,
    Notifications = 4
};
Q_DECLARE_FLAGS(PushNotificationTypes, PushNotificationType)
Q_DECLARE_OPERATORS_FOR_FLAGS(PushNotificationTypes)

/**
 * @brief The Capabilities class represents the capabilities of an ownCloud
 * server
 * @ingroup libsync
 */
class OWNCLOUDSYNC_EXPORT Capabilities
{
public:
    Capabilities(const QVariantMap &capabilities);

    bool shareAPI() const;
    bool shareEmailPasswordEnabled() const;
    bool shareEmailPasswordEnforced() const;
    bool sharePublicLink() const;
    bool sharePublicLinkAllowUpload() const;
    bool sharePublicLinkSupportsUploadOnly() const;
    bool sharePublicLinkAskOptionalPassword() const;
    bool sharePublicLinkEnforcePassword() const;
    bool sharePublicLinkEnforceExpireDate() const;
    int sharePublicLinkExpireDateDays() const;
    bool sharePublicLinkMultiple() const;
    bool shareResharing() const;
    bool chunkingNg() const;
    bool userStatus() const;

    /// Returns which kind of push notfications are available
    PushNotificationTypes availablePushNotifications() const;

    /// Websocket url for files push notifications if available
    QUrl pushNotificationsWebSocketUrl() const;

    /// disable parallel upload in chunking
    bool chunkingParallelUploadDisabled() const;

    /// Whether the "privatelink" DAV property is available
    bool privateLinkPropertyAvailable() const;

    /// returns true if the capabilities report notifications
    bool notificationsAvailable() const;

    /// returns true if the server supports client side encryption
    bool clientSideEncryptionAvailable() const;

    /// returns true if the capabilities are loaded already.
    bool isValid() const;

    /// return true if the activity app is enabled
    bool hasActivities() const;

    /**
     * Returns the checksum types the server understands.
     *
     * When the client uses one of these checksumming algorithms in
     * the OC-Checksum header of a file upload, the server will use
     * it to validate that data was transmitted correctly.
     *
     * Path: checksums/supportedTypes
     * Default: []
     * Possible entries: "Adler32", "MD5", "SHA1"
     */
    QList<QByteArray> supportedChecksumTypes() const;

    /**
     * The checksum algorithm that the server recommends for file uploads.
     * This is just a preference, any algorithm listed in supportedTypes may be used.
     *
     * Path: checksums/preferredUploadType
     * Default: empty, meaning "no preference"
     * Possible values: empty or any of the supportedTypes
     */
    QByteArray preferredUploadChecksumType() const;

    /**
     * Helper that returns the preferredUploadChecksumType() if set, or one
     * of the supportedChecksumTypes() if it isn't. May return an empty
     * QByteArray if no checksum types are supported.
     */
    QByteArray uploadChecksumType() const;

    /**
     * List of HTTP error codes should be guaranteed to eventually reset
     * failing chunked uploads.
     *
     * The resetting works by tracking UploadInfo::errorCount.
     *
     * Note that other error codes than the ones listed here may reset the
     * upload as well.
     *
     * Motivation: See #5344. They should always be reset on 412 (possibly
     * checksum error), but broken servers may also require resets on
     * unusual error codes such as 503.
     *
     * Path: dav/httpErrorCodesThatResetFailingChunkedUploads
     * Default: []
     * Example: [503, 500]
     */
    QList<int> httpErrorCodesThatResetFailingChunkedUploads() const;

    /**
     * Regex that, if contained in a filename, will result in it not being uploaded.
     *
     * For servers older than 8.1.0 it defaults to [\\:?*"<>|]
     * For servers >= that version, it defaults to the empty regex (the server
     * will indicate invalid characters through an upload error)
     *
     * Note that it just needs to be contained. The regex [ab] is contained in "car".
     */
    QString invalidFilenameRegex() const;

    /**
     * return the list of filename that should not be uploaded
     */
    QStringList blacklistedFiles() const;

    /**
     * Whether conflict files should remain local (default) or should be uploaded.
     */
    bool uploadConflictFiles() const;

    // Direct Editing
    void addDirectEditor(DirectEditor* directEditor);
    DirectEditor* getDirectEditorForMimetype(const QMimeType &mimeType);
    DirectEditor* getDirectEditorForOptionalMimetype(const QMimeType &mimeType);

private:
    QVariantMap _capabilities;

    QList<DirectEditor*> _directEditors;
};

/*-------------------------------------------------------------------------------------*/

class OWNCLOUDSYNC_EXPORT DirectEditor : public QObject
{
    Q_OBJECT
public:
    DirectEditor(const QString &id, const QString &name, QObject* parent = nullptr);

    void addMimetype(const QByteArray &mimeType);
    void addOptionalMimetype(const QByteArray &mimeType);

    bool hasMimetype(const QMimeType &mimeType);
    bool hasOptionalMimetype(const QMimeType &mimeType);

    QString id() const;
    QString name() const;

    QList<QByteArray> mimeTypes() const;
    QList<QByteArray> optionalMimeTypes() const;

private:
    QString _id;
    QString _name;

    QList<QByteArray> _mimeTypes;
    QList<QByteArray> _optionalMimeTypes;
};

/*-------------------------------------------------------------------------------------*/

}

#endif //CAPABILITIES_H