Initial commit.

src/covermanager/discogscoverprovider.h

@@ -0,0 +1,90 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2012, Martin Björklund <mbj4668@gmail.com>
+ * Copyright 2016, 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 DISCOGSCOVERPROVIDER_H
+#define DISCOGSCOVERPROVIDER_H
+
+#include "config.h"
+
+#include <QXmlStreamReader>
+#include <QNetworkReply>
+
+#include "coverprovider.h"
+
+class QNetworkAccessManager;
+
+// This struct represents a single search-for-cover request. It identifies and describes the request.
+struct DiscogsCoverSearchContext {
+  enum State { State_Init, State_MastersRequested, State_ReleasesRequested };
+
+  // the unique request identifier
+  int id;
+
+  // the search query
+  QString artist;
+  QString album;
+
+  State state;
+
+  CoverSearchResults results;
+};
+Q_DECLARE_METATYPE(DiscogsCoverSearchContext)
+
+class DiscogsCoverProvider : public CoverProvider {
+  Q_OBJECT
+
+ public:
+  explicit DiscogsCoverProvider(QObject *parent = nullptr);
+
+  static const char *kUrl;
+
+  static const char *kRequestTokenURL;
+  static const char *kAuthorizeURL;
+  static const char *kAccessTokenURL;
+
+  static const char *kAccessKey;
+  static const char *kSecretAccessKey;
+
+  static const char *kAccessKeyB64;
+  static const char *kSecretAccessKeyB64;
+
+  bool StartSearch(const QString &artist, const QString &album, int id);
+  void CancelSearch(int id);
+
+ private slots:
+  void QueryError(QNetworkReply::NetworkError error, QNetworkReply *reply, int id);
+  void HandleSearchReply(QNetworkReply* reply, int id);
+
+ private:
+  QNetworkAccessManager *network_;
+  QHash<int, DiscogsCoverSearchContext*> pending_requests_;
+
+  void SendSearchRequest(DiscogsCoverSearchContext *ctx);
+  void ReadItem(QXmlStreamReader *reader, CoverSearchResults *results);
+  void ReadLargeImage(QXmlStreamReader *reader, CoverSearchResults *results);
+  void QueryFinished(QNetworkReply *reply, int id);
+  void EndSearch(DiscogsCoverSearchContext *ctx);
+
+};
+
+#endif  // DISCOGSCOVERPROVIDER_H
+