Add Last.fm import

Fixes #247

src/scrobbler/lastfmimport.h

@@ -0,0 +1,113 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2020, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef LASTFMIMPORT_H
+#define LASTFMIMPORT_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QList>
+#include <QVariant>
+#include <QByteArray>
+#include <QString>
+#include <QQueue>
+#include <QDateTime>
+
+class QTimer;
+class QNetworkReply;
+
+class NetworkAccessManager;
+
+class LastFMImport : public QObject {
+  Q_OBJECT
+
+ public:
+  explicit LastFMImport(QObject *parent = nullptr);
+  ~LastFMImport() override;
+
+  void ReloadSettings();
+  void ImportData(const bool lastplayed = true, const bool playcount = true);
+  void AbortAll();
+
+ private:
+  typedef QPair<QString, QString> Param;
+  typedef QList<Param> ParamList;
+
+  struct GetRecentTracksRequest {
+    explicit GetRecentTracksRequest(const int _page) : page(_page) {}
+    int page;
+  };
+  struct GetTopTracksRequest {
+    explicit GetTopTracksRequest(const int _page) : page(_page) {}
+    int page;
+  };
+
+ private:
+  QNetworkReply *CreateRequest(const ParamList &request_params);
+  QByteArray GetReplyData(QNetworkReply *reply);
+  QJsonObject ExtractJsonObj(const QByteArray &data);
+
+  void AddGetRecentTracksRequest(const int page = 0);
+  void AddGetTopTracksRequest(const int page = 0);
+
+  void SendGetRecentTracksRequest(GetRecentTracksRequest request);
+  void SendGetTopTracksRequest(GetTopTracksRequest request);
+
+  void Error(const QString &error, const QVariant &debug = QVariant());
+
+  void UpdateTotal();
+  void UpdateProgress();
+
+  void FinishCheck();
+
+ signals:
+  void UpdatePlayCount(QString, QString, int);
+  void UpdateLastPlayed(QString, QString, QString, int);
+  void UpdateTotal(int, int);
+  void UpdateProgress(int, int);
+  void Finished();
+  void FinishedWithError(QString);
+
+ private slots:
+  void FlushRequests();
+  void GetRecentTracksRequestFinished(QNetworkReply *reply, const int page);
+  void GetTopTracksRequestFinished(QNetworkReply *reply, const int page);
+
+ private:
+  static const int kRequestsDelay;
+
+  NetworkAccessManager *network_;
+  QTimer *timer_flush_requests_;
+
+  QString username_;
+  bool lastplayed_;
+  bool playcount_;
+  int playcount_total_;
+  int lastplayed_total_;
+  int playcount_received_;
+  int lastplayed_received_;
+  QQueue<GetRecentTracksRequest> recent_tracks_requests_;
+  QQueue<GetTopTracksRequest> top_tracks_requests_;
+  QList<QNetworkReply*> replies_;
+
+};
+
+#endif  // LASTFMIMPORT_H