Add scrobbler with support for Last.fm, Libre.fm and ListenBrainz

src/scrobbler/scrobblerservice.cpp

@@ -0,0 +1,57 @@
+/*
+ * 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/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QObject>
+#include <QString>
+#include <QByteArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+
+#include "scrobblerservice.h"
+
+ScrobblerService::ScrobblerService(const QString &name, Application *app, QObject *parent) : QObject(parent), name_(name) {}
+
+QJsonObject ScrobblerService::ExtractJsonObj(const QByteArray &data) {
+
+  QJsonParseError error;
+  QJsonDocument json_doc = QJsonDocument::fromJson(data, &error);
+
+  if (error.error != QJsonParseError::NoError) {
+    Error("Reply from server missing Json data.", data);
+    return QJsonObject();
+  }
+  if (json_doc.isNull() || json_doc.isEmpty()) {
+    Error("Received empty Json document.", json_doc);
+    return QJsonObject();
+  }
+  if (!json_doc.isObject()) {
+    Error("Json document is not an object.", json_doc);
+    return QJsonObject();
+  }
+  QJsonObject json_obj = json_doc.object();
+  if (json_obj.isEmpty()) {
+    Error("Received empty Json object.", json_doc);
+    return QJsonObject();
+  }
+
+  return json_obj;
+
+}