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#ifndef REMOTE_FILE_HPP__
#define REMOTE_FILE_HPP__
#include <QObject>
#include <QString>
#include <QUrl>
#include <QFileInfo>
#include <QSaveFile>
#include <QPointer>
class QNetworkAccessManager;
class QNetworkReply;
//
// Synchronize an individual file specified by a URL to the local file
// system
//
class RemoteFile final
: public QObject
{
Q_OBJECT
public:
//
// Clients of RemoteFile must provide an instance of this
// interface. It may be used to receive information and requests
// from the RemoteFile instance as it does its work.
//
class ListenerInterface
{
protected:
ListenerInterface () {}
public:
virtual void error (QString const& title, QString const& message) = 0;
virtual bool redirect_request (QUrl const&) {return false;} // disallow
virtual void download_progress (qint64 /* bytes_received */, qint64 /* total_bytes */) {}
virtual void download_finished (bool /* success */) {}
};
explicit RemoteFile (ListenerInterface * listener, QNetworkAccessManager * network_manager
, QString const& local_file_path, bool http_only = false
, QObject * parent = nullptr);
// true if local file exists or will do very soon
bool local () const;
// download/remove the local file
bool sync (QUrl const& url, bool local = true, bool force = false);
// abort an active download
void abort ();
// change the local location, this will rename if the file exists locally
void local_file_path (QString const&);
QString local_file_path () const {return local_file_.absoluteFilePath ();}
QUrl url () const {return url_;}
// always use an http scheme for remote URLs
void http_only (bool flag = true) {http_only_ = flag;}
private:
void download (QUrl url);
void reply_finished ();
Q_SLOT void store ();
Q_SIGNAL void redirect (QUrl const&, unsigned redirect_count);
Q_SIGNAL void downloadProgress (qint64 bytes_received, qint64 total_bytes);
Q_SIGNAL void finished ();
ListenerInterface * listener_;
QNetworkAccessManager * network_manager_;
QFileInfo local_file_;
bool http_only_;
QUrl url_;
QPointer<QNetworkReply> reply_;
bool is_valid_;
unsigned redirect_count_;
QSaveFile file_;
};
#endif
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