Add Deezer support

src/settings/deezersettingspage.h

@@ -0,0 +1,66 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018, 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 DEEZERSETTINGSPAGE_H
+#define DEEZERSETTINGSPAGE_H
+
+#include <QObject>
+#include <QString>
+#include <QEvent>
+
+#include "settings/settingspage.h"
+
+class DeezerService;
+class Ui_DeezerSettingsPage;
+
+class DeezerSettingsPage : public SettingsPage {
+  Q_OBJECT
+
+ public:
+  explicit DeezerSettingsPage(SettingsDialog* parent = nullptr);
+  ~DeezerSettingsPage();
+
+  enum SearchBy {
+    SearchBy_Songs = 1,
+    SearchBy_Albums = 2,
+  };
+
+  static const char *kSettingsGroup;
+
+  void Load();
+  void Save();
+
+  bool eventFilter(QObject *object, QEvent *event);
+
+signals:
+  void Login();
+  void Login(const QString &username, const QString &password);
+
+ private slots:
+  void LoginClicked();
+  void LogoutClicked();
+  void LoginSuccess();
+  void LoginFailure(QString failure_reason);
+
+ private:
+  Ui_DeezerSettingsPage* ui_;
+  DeezerService *service_;
+};
+
+#endif