Add Spotify support

src/spotify/spotifybaserequest.cpp

@@ -0,0 +1,184 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 <QByteArray>
+#include <QPair>
+#include <QList>
+#include <QString>
+#include <QUrl>
+#include <QUrlQuery>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QSslError>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QJsonValue>
+
+#include "core/logging.h"
+#include "core/networkaccessmanager.h"
+#include "spotifyservice.h"
+#include "spotifybaserequest.h"
+
+SpotifyBaseRequest::SpotifyBaseRequest(SpotifyService *service, NetworkAccessManager *network, QObject *parent)
+    : QObject(parent),
+      service_(service),
+      network_(network) {}
+
+QNetworkReply *SpotifyBaseRequest::CreateRequest(const QString &ressource_name, const ParamList &params_provided) {
+
+  ParamList params = ParamList() << params_provided;
+
+  QUrlQuery url_query;
+  for (const Param &param : params) {
+    url_query.addQueryItem(QString::fromLatin1(QUrl::toPercentEncoding(param.first)), QString::fromLatin1(QUrl::toPercentEncoding(param.second)));
+  }
+
+  QUrl url(QLatin1String(SpotifyService::kApiUrl) + QLatin1Char('/') + ressource_name);
+  url.setQuery(url_query);
+  QNetworkRequest req(url);
+  req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
+  req.setHeader(QNetworkRequest::ContentTypeHeader, QStringLiteral("application/x-www-form-urlencoded"));
+  if (!access_token().isEmpty()) req.setRawHeader("authorization", "Bearer " + access_token().toUtf8());
+
+  QNetworkReply *reply = network_->get(req);
+  QObject::connect(reply, &QNetworkReply::sslErrors, this, &SpotifyBaseRequest::HandleSSLErrors);
+
+  qLog(Debug) << "Spotify: Sending request" << url;
+
+  return reply;
+
+}
+
+void SpotifyBaseRequest::HandleSSLErrors(const QList<QSslError> &ssl_errors) {
+
+  for (const QSslError &ssl_error : ssl_errors) {
+    Error(ssl_error.errorString());
+  }
+
+}
+
+QByteArray SpotifyBaseRequest::GetReplyData(QNetworkReply *reply) {
+
+  QByteArray data;
+
+  if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
+    data = reply->readAll();
+  }
+  else {
+    if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
+      // This is a network error, there is nothing more to do.
+      Error(QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
+    }
+    else {
+      // See if there is Json data containing "error".
+      data = reply->readAll();
+      QString error;
+      QJsonParseError json_error;
+      QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
+      int status = 0;
+      if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
+        QJsonObject json_obj = json_doc.object();
+        if (!json_obj.isEmpty() && json_obj.contains(QLatin1String("error")) && json_obj[QLatin1String("error")].isObject()) {
+          QJsonObject obj_error = json_obj[QLatin1String("error")].toObject();
+          if (!obj_error.isEmpty() && obj_error.contains(QLatin1String("status")) && obj_error.contains(QLatin1String("message"))) {
+            status = obj_error[QLatin1String("status")].toInt();
+            QString user_message = obj_error[QLatin1String("message")].toString();
+            error = QStringLiteral("%1 (%2)").arg(user_message).arg(status);
+          }
+        }
+      }
+      if (error.isEmpty()) {
+        if (reply->error() == QNetworkReply::NoError) {
+          error = QStringLiteral("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
+        }
+        else {
+          error = QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error());
+        }
+      }
+      Error(error);
+    }
+    return QByteArray();
+  }
+
+  return data;
+
+}
+
+QJsonObject SpotifyBaseRequest::ExtractJsonObj(const QByteArray &data) {
+
+  QJsonParseError json_error;
+  QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
+
+  if (json_error.error != QJsonParseError::NoError) {
+    Error(QStringLiteral("Reply from server missing Json data."), data);
+    return QJsonObject();
+  }
+
+  if (json_doc.isEmpty()) {
+    Error(QStringLiteral("Received empty Json document."), data);
+    return QJsonObject();
+  }
+
+  if (!json_doc.isObject()) {
+    Error(QStringLiteral("Json document is not an object."), json_doc);
+    return QJsonObject();
+  }
+
+  QJsonObject json_obj = json_doc.object();
+  if (json_obj.isEmpty()) {
+    Error(QStringLiteral("Received empty Json object."), json_doc);
+    return QJsonObject();
+  }
+
+  return json_obj;
+
+}
+
+QJsonValue SpotifyBaseRequest::ExtractItems(const QByteArray &data) {
+
+  QJsonObject json_obj = ExtractJsonObj(data);
+  if (json_obj.isEmpty()) return QJsonValue();
+  return ExtractItems(json_obj);
+
+}
+
+QJsonValue SpotifyBaseRequest::ExtractItems(const QJsonObject &json_obj) {
+
+  if (!json_obj.contains(QLatin1String("items"))) {
+    Error(QStringLiteral("Json reply is missing items."), json_obj);
+    return QJsonArray();
+  }
+  QJsonValue json_items = json_obj[QLatin1String("items")];
+  return json_items;
+
+}
+
+QString SpotifyBaseRequest::ErrorsToHTML(const QStringList &errors) {
+
+  QString error_html;
+  for (const QString &error : errors) {
+    error_html += error + QLatin1String("<br />");
+  }
+  return error_html;
+
+}

src/spotify/spotifybaserequest.h

@@ -0,0 +1,91 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 SPOTIFYBASEREQUEST_H
+#define SPOTIFYBASEREQUEST_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QSet>
+#include <QList>
+#include <QPair>
+#include <QVariant>
+#include <QByteArray>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QSslError>
+#include <QJsonObject>
+#include <QJsonValue>
+
+#include "spotifyservice.h"
+
+class QNetworkReply;
+class NetworkAccessManager;
+
+class SpotifyBaseRequest : public QObject {
+  Q_OBJECT
+
+ public:
+  explicit SpotifyBaseRequest(SpotifyService *service, NetworkAccessManager *network, QObject *parent = nullptr);
+
+  enum class QueryType {
+    None,
+    Artists,
+    Albums,
+    Songs,
+    SearchArtists,
+    SearchAlbums,
+    SearchSongs,
+    StreamURL,
+  };
+
+ protected:
+  typedef QPair<QString, QString> Param;
+  typedef QList<Param> ParamList;
+
+  QNetworkReply *CreateRequest(const QString &ressource_name, const ParamList &params_provided);
+  QByteArray GetReplyData(QNetworkReply *reply);
+  QJsonObject ExtractJsonObj(const QByteArray &data);
+  QJsonValue ExtractItems(const QByteArray &data);
+  QJsonValue ExtractItems(const QJsonObject &json_obj);
+
+  virtual void Error(const QString &error, const QVariant &debug = QVariant()) = 0;
+  static QString ErrorsToHTML(const QStringList &errors);
+
+  int artistssearchlimit() { return service_->artistssearchlimit(); }
+  int albumssearchlimit() { return service_->albumssearchlimit(); }
+  int songssearchlimit() { return service_->songssearchlimit(); }
+
+  QString access_token() { return service_->access_token(); }
+
+  bool authenticated() { return service_->authenticated(); }
+
+ private slots:
+  void HandleSSLErrors(const QList<QSslError> &ssl_errors);
+
+ private:
+  SpotifyService *service_;
+  NetworkAccessManager *network_;
+
+};
+
+#endif  // SPOTIFYBASEREQUEST_H

src/spotify/spotifyfavoriterequest.cpp

@@ -0,0 +1,310 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 <QtGlobal>
+#include <QObject>
+#include <QPair>
+#include <QList>
+#include <QMap>
+#include <QMultiMap>
+#include <QByteArray>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QUrlQuery>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QJsonDocument>
+#include <QJsonArray>
+
+#include "core/logging.h"
+#include "core/networkaccessmanager.h"
+#include "core/song.h"
+#include "spotifyservice.h"
+#include "spotifybaserequest.h"
+#include "spotifyfavoriterequest.h"
+
+SpotifyFavoriteRequest::SpotifyFavoriteRequest(SpotifyService *service, NetworkAccessManager *network, QObject *parent)
+    : SpotifyBaseRequest(service, network, parent),
+      service_(service),
+      network_(network) {}
+
+SpotifyFavoriteRequest::~SpotifyFavoriteRequest() {
+
+  while (!replies_.isEmpty()) {
+    QNetworkReply *reply = replies_.takeFirst();
+    QObject::disconnect(reply, nullptr, this, nullptr);
+    reply->abort();
+    reply->deleteLater();
+  }
+
+}
+
+QString SpotifyFavoriteRequest::FavoriteText(const FavoriteType type) {
+
+  switch (type) {
+    case FavoriteType_Artists:
+      return QStringLiteral("artists");
+    case FavoriteType_Albums:
+      return QStringLiteral("albums");
+    case FavoriteType_Songs:
+      return QStringLiteral("tracks");
+  }
+
+  return QString();
+
+}
+
+void SpotifyFavoriteRequest::AddArtists(const SongList &songs) {
+  AddFavorites(FavoriteType_Artists, songs);
+}
+
+void SpotifyFavoriteRequest::AddAlbums(const SongList &songs) {
+  AddFavorites(FavoriteType_Albums, songs);
+}
+
+void SpotifyFavoriteRequest::AddSongs(const SongList &songs) {
+  AddFavorites(FavoriteType_Songs, songs);
+}
+
+void SpotifyFavoriteRequest::AddSongs(const SongMap &songs) {
+  AddFavorites(FavoriteType_Songs, songs.values());
+}
+
+void SpotifyFavoriteRequest::AddFavorites(const FavoriteType type, const SongList &songs) {
+
+  QStringList list_ids;
+  QJsonArray array_ids;
+  for (const Song &song : songs) {
+    QString id;
+    switch (type) {
+      case FavoriteType_Artists:
+        id = song.artist_id();
+        break;
+      case FavoriteType_Albums:
+        id = song.album_id();
+        break;
+      case FavoriteType_Songs:
+        id = song.song_id();
+        break;
+    }
+    if (!id.isEmpty()) {
+      if (!list_ids.contains(id)) {
+        list_ids << id;
+      }
+      if (!array_ids.contains(id)) {
+        array_ids << id;
+      }
+    }
+  }
+
+  if (list_ids.isEmpty() || array_ids.isEmpty()) return;
+
+  QByteArray json_data = QJsonDocument(array_ids).toJson();
+  QString ids_list = list_ids.join(QLatin1Char(','));
+
+  AddFavoritesRequest(type, ids_list, json_data, songs);
+
+}
+
+void SpotifyFavoriteRequest::AddFavoritesRequest(const FavoriteType type, const QString &ids_list, const QByteArray &json_data, const SongList &songs) {
+
+  QUrl url(QLatin1String(SpotifyService::kApiUrl) + (type == FavoriteType_Artists ? QStringLiteral("/me/following") : QStringLiteral("/me/") + FavoriteText(type)));
+  if (type == FavoriteType_Artists) {
+    QUrlQuery url_query;
+    url_query.addQueryItem(QStringLiteral("type"), QStringLiteral("artist"));
+    url_query.addQueryItem(QStringLiteral("ids"), ids_list);
+    url.setQuery(url_query);
+  }
+  QNetworkRequest req(url);
+  req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
+  req.setHeader(QNetworkRequest::ContentTypeHeader, QStringLiteral("application/x-www-form-urlencoded"));
+  if (!access_token().isEmpty()) req.setRawHeader("authorization", "Bearer " + access_token().toUtf8());
+  QNetworkReply *reply = nullptr;
+  if (type == FavoriteType_Artists) {
+    reply = network_->put(req, "");
+  }
+  else {
+    reply = network_->put(req, json_data);
+  }
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, type, songs]() { AddFavoritesReply(reply, type, songs); });
+  replies_ << reply;
+
+}
+
+void SpotifyFavoriteRequest::AddFavoritesReply(QNetworkReply *reply, const FavoriteType type, const SongList &songs) {
+
+  if (!replies_.contains(reply)) return;
+  replies_.removeAll(reply);
+  QObject::disconnect(reply, nullptr, this, nullptr);
+  reply->deleteLater();
+
+  GetReplyData(reply);
+  if (reply->error() != QNetworkReply::NoError) {
+    return;
+  }
+
+  if (type == FavoriteType_Artists) {
+    qLog(Debug) << "Spotify:" << songs.count() << "songs added to followed" << FavoriteText(type);
+  }
+  else {
+    qLog(Debug) << "Spotify:" << songs.count() << "songs added to saved" << FavoriteText(type);
+  }
+
+  switch (type) {
+    case FavoriteType_Artists:
+      emit ArtistsAdded(songs);
+      break;
+    case FavoriteType_Albums:
+      emit AlbumsAdded(songs);
+      break;
+    case FavoriteType_Songs:
+      emit SongsAdded(songs);
+      break;
+  }
+
+}
+
+void SpotifyFavoriteRequest::RemoveArtists(const SongList &songs) {
+  RemoveFavorites(FavoriteType_Artists, songs);
+}
+
+void SpotifyFavoriteRequest::RemoveAlbums(const SongList &songs) {
+  RemoveFavorites(FavoriteType_Albums, songs);
+}
+
+void SpotifyFavoriteRequest::RemoveSongs(const SongList &songs) {
+  RemoveFavorites(FavoriteType_Songs, songs);
+}
+
+void SpotifyFavoriteRequest::RemoveSongs(const SongMap &songs) {
+
+  RemoveFavorites(FavoriteType_Songs, songs.values());
+
+}
+
+void SpotifyFavoriteRequest::RemoveFavorites(const FavoriteType type, const SongList &songs) {
+
+  QStringList list_ids;
+  QJsonArray array_ids;
+  for (const Song &song : songs) {
+    QString id;
+    switch (type) {
+      case FavoriteType_Artists:
+        id = song.artist_id();
+        break;
+      case FavoriteType_Albums:
+        id = song.album_id();
+        break;
+      case FavoriteType_Songs:
+        id = song.song_id();
+        break;
+    }
+    if (!id.isEmpty()) {
+      if (!list_ids.contains(id)) {
+        list_ids << id;
+      }
+      if (!array_ids.contains(id)) {
+        array_ids << id;
+      }
+    }
+  }
+
+  if (list_ids.isEmpty() || array_ids.isEmpty()) return;
+
+  QByteArray json_data = QJsonDocument(array_ids).toJson();
+  QString ids_list = list_ids.join(QLatin1Char(','));
+
+  RemoveFavoritesRequest(type, ids_list, json_data, songs);
+
+}
+
+void SpotifyFavoriteRequest::RemoveFavoritesRequest(const FavoriteType type, const QString &ids_list, const QByteArray &json_data, const SongList &songs) {
+
+  Q_UNUSED(json_data)
+
+  QUrl url(QLatin1String(SpotifyService::kApiUrl) + (type == FavoriteType_Artists ? QStringLiteral("/me/following") : QStringLiteral("/me/") + FavoriteText(type)));
+  if (type == FavoriteType_Artists) {
+    QUrlQuery url_query;
+    url_query.addQueryItem(QStringLiteral("type"), QStringLiteral("artist"));
+    url_query.addQueryItem(QStringLiteral("ids"), ids_list);
+    url.setQuery(url_query);
+  }
+  QNetworkRequest req(url);
+#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
+  req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
+#else
+  req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
+#endif
+  req.setHeader(QNetworkRequest::ContentTypeHeader, QStringLiteral("application/x-www-form-urlencoded"));
+  if (!access_token().isEmpty()) req.setRawHeader("authorization", "Bearer " + access_token().toUtf8());
+  QNetworkReply *reply = nullptr;
+  if (type == FavoriteType_Artists) {
+    reply = network_->deleteResource(req);
+  }
+  else {
+    // FIXME
+    reply = network_->deleteResource(req);
+  }
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, type, songs]() { RemoveFavoritesReply(reply, type, songs); });
+  replies_ << reply;
+
+}
+
+void SpotifyFavoriteRequest::RemoveFavoritesReply(QNetworkReply *reply, const FavoriteType type, const SongList &songs) {
+
+  if (!replies_.contains(reply)) return;
+  replies_.removeAll(reply);
+  QObject::disconnect(reply, nullptr, this, nullptr);
+  reply->deleteLater();
+
+  GetReplyData(reply);
+  if (reply->error() != QNetworkReply::NoError) {
+    return;
+  }
+
+  if (type == FavoriteType_Artists) {
+    qLog(Debug) << "Spotify:" << songs.count() << "songs removed from followed" << FavoriteText(type);
+  }
+  else {
+    qLog(Debug) << "Spotify:" << songs.count() << "songs removed from saved" << FavoriteText(type);
+  }
+
+  switch (type) {
+    case FavoriteType_Artists:
+      emit ArtistsRemoved(songs);
+      break;
+    case FavoriteType_Albums:
+      emit AlbumsRemoved(songs);
+      break;
+    case FavoriteType_Songs:
+      emit SongsRemoved(songs);
+      break;
+  }
+
+}
+
+void SpotifyFavoriteRequest::Error(const QString &error, const QVariant &debug) {
+
+  qLog(Error) << "Spotify:" << error;
+  if (debug.isValid()) qLog(Debug) << debug;
+
+}

src/spotify/spotifyfavoriterequest.h

@@ -0,0 +1,90 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 SPOTIFYFAVORITEREQUEST_H
+#define SPOTIFYFAVORITEREQUEST_H
+
+#include "config.h"
+
+#include <QObject>
+#include <QList>
+#include <QMap>
+#include <QVariant>
+#include <QByteArray>
+#include <QString>
+
+#include "spotifybaserequest.h"
+#include "core/song.h"
+
+class QNetworkReply;
+class SpotifyService;
+class NetworkAccessManager;
+
+class SpotifyFavoriteRequest : public SpotifyBaseRequest {
+  Q_OBJECT
+
+ public:
+  explicit SpotifyFavoriteRequest(SpotifyService *service, NetworkAccessManager *network, QObject *parent = nullptr);
+  ~SpotifyFavoriteRequest() override;
+
+  enum FavoriteType {
+    FavoriteType_Artists,
+    FavoriteType_Albums,
+    FavoriteType_Songs
+  };
+
+ signals:
+  void ArtistsAdded(SongList);
+  void AlbumsAdded(SongList);
+  void SongsAdded(SongList);
+  void ArtistsRemoved(SongList);
+  void AlbumsRemoved(SongList);
+  void SongsRemoved(SongList);
+
+ private slots:
+  void AddFavoritesReply(QNetworkReply *reply, const SpotifyFavoriteRequest::FavoriteType type, const SongList &songs);
+  void RemoveFavoritesReply(QNetworkReply *reply, const SpotifyFavoriteRequest::FavoriteType type, const SongList &songs);
+
+ public slots:
+  void AddArtists(const SongList &songs);
+  void AddAlbums(const SongList &songs);
+  void AddSongs(const SongList &songs);
+  void AddSongs(const SongMap &songs);
+
+  void RemoveArtists(const SongList &songs);
+  void RemoveAlbums(const SongList &songs);
+  void RemoveSongs(const SongList &songs);
+  void RemoveSongs(const SongMap &songs);
+
+ private:
+  void Error(const QString &error, const QVariant &debug = QVariant()) override;
+  static QString FavoriteText(const FavoriteType type);
+  void AddFavorites(const FavoriteType type, const SongList &songs);
+  void AddFavoritesRequest(const FavoriteType type, const QString &ids_list, const QByteArray &json_data, const SongList &songs);
+  void RemoveFavorites(const FavoriteType type, const SongList &songs);
+  void RemoveFavorites(const FavoriteType type, const QString &id, const SongList &songs);
+  void RemoveFavoritesRequest(const FavoriteType type, const QString &ids_list, const QByteArray &json_data, const SongList &songs);
+
+  SpotifyService *service_;
+  NetworkAccessManager *network_;
+  QList <QNetworkReply*> replies_;
+
+};
+
+#endif  // SPOTIFYFAVORITEREQUEST_H

src/spotify/spotifyrequest.h

@@ -0,0 +1,233 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 SPOTIFYREQUEST_H
+#define SPOTIFYREQUEST_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QPair>
+#include <QSet>
+#include <QList>
+#include <QMap>
+#include <QMultiMap>
+#include <QQueue>
+#include <QVariant>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QJsonObject>
+#include <QTimer>
+
+#include "core/song.h"
+#include "spotifybaserequest.h"
+
+class QNetworkReply;
+class Application;
+class NetworkAccessManager;
+class SpotifyService;
+
+class SpotifyRequest : public SpotifyBaseRequest {
+  Q_OBJECT
+
+ public:
+  explicit SpotifyRequest(SpotifyService *service, Application *app, NetworkAccessManager *network, QueryType type, QObject *parent);
+  ~SpotifyRequest() override;
+
+  void ReloadSettings();
+
+  void Process();
+  void Search(const int query_id, const QString &search_text);
+
+ private:
+  struct Artist {
+    QString artist_id;
+    QString artist;
+  };
+  struct Album {
+    QString album_id;
+    QString album;
+    QUrl cover_url;
+  };
+  struct Request {
+    Request() : offset(0), limit(0) {}
+    int offset;
+    int limit;
+  };
+  struct ArtistAlbumsRequest {
+    ArtistAlbumsRequest() : offset(0), limit(0) {}
+    Artist artist;
+    int offset;
+    int limit;
+  };
+  struct AlbumSongsRequest {
+    AlbumSongsRequest() : offset(0), limit(0) {}
+    Artist artist;
+    Album album;
+    int offset;
+    int limit;
+  };
+  struct AlbumCoverRequest {
+    QString artist_id;
+    QString album_id;
+    QUrl url;
+    QString filename;
+  };
+
+ signals:
+  void Results(int id, SongMap songs, QString error);
+  void UpdateStatus(int id, QString text);
+  void ProgressSetMaximum(int id, int max);
+  void UpdateProgress(int id, int max);
+  void StreamURLFinished(QUrl original_url, QUrl url, Song::FileType, QString error = QString());
+
+ private slots:
+  void FlushRequests();
+
+  void ArtistsReplyReceived(QNetworkReply *reply, const int limit_requested, const int offset_requested);
+
+  void AlbumsReplyReceived(QNetworkReply *reply, const int limit_requested, const int offset_requested);
+  void AlbumsReceived(QNetworkReply *reply, const Artist &artist_artist, const int limit_requested, const int offset_requested);
+
+  void SongsReplyReceived(QNetworkReply *reply, const int limit_requested, const int offset_requested);
+  void SongsReceived(QNetworkReply *reply, const Artist &artist, const Album &album, const int limit_requested, const int offset_requested);
+
+  void ArtistAlbumsReplyReceived(QNetworkReply *reply, const Artist &artist, const int offset_requested);
+  void AlbumSongsReplyReceived(QNetworkReply *reply, const Artist &artist, const Album &album, const int offset_requested);
+  void AlbumCoverReceived(QNetworkReply *reply, const QString &album_id, const QUrl &url, const QString &filename);
+
+ private:
+  void StartRequests();
+
+  bool IsQuery() const { return (type_ == QueryType::Artists || type_ == QueryType::Albums || type_ == QueryType::Songs); }
+  bool IsSearch() const { return (type_ == QueryType::SearchArtists || type_ == QueryType::SearchAlbums || type_ == QueryType::SearchSongs); }
+
+  void GetArtists();
+  void GetAlbums();
+  void GetSongs();
+
+  void ArtistsSearch();
+  void AlbumsSearch();
+  void SongsSearch();
+
+  void AddArtistsRequest(const int offset = 0, const int limit = 0);
+  void AddArtistsSearchRequest(const int offset = 0);
+  void FlushArtistsRequests();
+  void AddAlbumsRequest(const int offset = 0, const int limit = 0);
+  void AddAlbumsSearchRequest(const int offset = 0);
+  void FlushAlbumsRequests();
+  void AddSongsRequest(const int offset = 0, const int limit = 0);
+  void AddSongsSearchRequest(const int offset = 0);
+  void FlushSongsRequests();
+
+  void ArtistsFinishCheck(const int limit = 0, const int offset = 0, const int artists_received = 0);
+  void AlbumsFinishCheck(const Artist &artist, const int limit = 0, const int offset = 0, const int albums_total = 0, const int albums_received = 0);
+  void SongsFinishCheck(const Artist &artist, const Album &album, const int limit = 0, const int offset = 0, const int songs_total = 0, const int songs_received = 0);
+
+  void AddArtistAlbumsRequest(const Artist &artist, const int offset = 0);
+  void FlushArtistAlbumsRequests();
+
+  void AddAlbumSongsRequest(const Artist &artist, const Album &album, const int offset = 0);
+  void FlushAlbumSongsRequests();
+
+  void ParseSong(Song &song, const QJsonObject &json_obj, const Artist &album_artist, const Album &album);
+
+  void GetAlbumCoversCheck();
+  void GetAlbumCovers();
+  void AddAlbumCoverRequest(const Song &song);
+  void FlushAlbumCoverRequests();
+  void AlbumCoverFinishCheck();
+
+  int GetProgress(const int count, const int total);
+  void FinishCheck();
+  static void Warn(const QString &error, const QVariant &debug = QVariant());
+  void Error(const QString &error, const QVariant &debug = QVariant()) override;
+
+ private:
+  SpotifyService *service_;
+  Application *app_;
+  NetworkAccessManager *network_;
+  QTimer *timer_flush_requests_;
+
+  QueryType type_;
+  bool fetchalbums_;
+  QString coversize_;
+
+  int query_id_;
+  QString search_text_;
+
+  bool finished_;
+
+  QQueue<Request> artists_requests_queue_;
+  QQueue<Request> albums_requests_queue_;
+  QQueue<Request> songs_requests_queue_;
+
+  QQueue<ArtistAlbumsRequest> artist_albums_requests_queue_;
+  QQueue<AlbumSongsRequest> album_songs_requests_queue_;
+  QQueue<AlbumCoverRequest> album_cover_requests_queue_;
+
+  QMap<QString, ArtistAlbumsRequest> artist_albums_requests_pending_;
+  QMap<QString, AlbumSongsRequest> album_songs_requests_pending_;
+  QMultiMap<QString, QString> album_covers_requests_sent_;
+
+  int artists_requests_total_;
+  int artists_requests_active_;
+  int artists_requests_received_;
+  int artists_total_;
+  int artists_received_;
+
+  int albums_requests_total_;
+  int albums_requests_active_;
+  int albums_requests_received_;
+  int albums_total_;
+  int albums_received_;
+
+  int songs_requests_total_;
+  int songs_requests_active_;
+  int songs_requests_received_;
+  int songs_total_;
+  int songs_received_;
+
+  int artist_albums_requests_total_;
+  int artist_albums_requests_active_;
+  int artist_albums_requests_received_;
+  int artist_albums_total_;
+  int artist_albums_received_;
+
+  int album_songs_requests_active_;
+  int album_songs_requests_received_;
+  int album_songs_requests_total_;
+  int album_songs_total_;
+  int album_songs_received_;
+
+  int album_covers_requests_total_;
+  int album_covers_requests_active_;
+  int album_covers_requests_received_;
+
+  SongMap songs_;
+  QStringList errors_;
+  bool no_results_;
+  QList<QNetworkReply*> replies_;
+  QList<QNetworkReply*> album_cover_replies_;
+
+};
+
+#endif  // SPOTIFYREQUEST_H

src/spotify/spotifyservice.cpp

@@ -0,0 +1,749 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 <memory>
+#include <chrono>
+
+#include <QObject>
+#include <QDesktopServices>
+#include <QCryptographicHash>
+#include <QByteArray>
+#include <QPair>
+#include <QList>
+#include <QMap>
+#include <QString>
+#include <QChar>
+#include <QUrl>
+#include <QUrlQuery>
+#include <QDateTime>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QSslError>
+#include <QTimer>
+#include <QJsonValue>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QSettings>
+#include <QMessageBox>
+
+#include "core/application.h"
+#include "core/player.h"
+#include "core/logging.h"
+#include "core/networkaccessmanager.h"
+#include "core/database.h"
+#include "core/song.h"
+#include "core/settings.h"
+#include "core/localredirectserver.h"
+#include "utilities/timeconstants.h"
+#include "utilities/randutils.h"
+#include "streaming/streamingsearchview.h"
+#include "collection/collectionbackend.h"
+#include "collection/collectionmodel.h"
+#include "spotifyservice.h"
+#include "spotifybaserequest.h"
+#include "spotifyrequest.h"
+#include "spotifyfavoriterequest.h"
+#include "settings/settingsdialog.h"
+#include "settings/spotifysettingspage.h"
+
+const Song::Source SpotifyService::kSource = Song::Source::Spotify;
+const char SpotifyService::kApiUrl[] = "https://api.spotify.com/v1";
+
+namespace {
+
+constexpr char kOAuthAuthorizeUrl[] = "https://accounts.spotify.com/authorize";
+constexpr char kOAuthAccessTokenUrl[] = "https://accounts.spotify.com/api/token";
+constexpr char kOAuthRedirectUrl[] = "http://localhost:63111/";
+constexpr char kClientIDB64[] = "ZTZjY2Y2OTQ5NzY1NGE3NThjOTAxNWViYzdiMWQzMTc=";
+constexpr char kClientSecretB64[] = "N2ZlMDMxODk1NTBlNDE3ZGI1ZWQ1MzE3ZGZlZmU2MTE=";
+
+constexpr char kArtistsSongsTable[] = "spotify_artists_songs";
+constexpr char kAlbumsSongsTable[] = "spotify_albums_songs";
+constexpr char kSongsTable[] = "spotify_songs";
+
+}  // namespace
+
+using std::make_shared;
+using namespace std::chrono_literals;
+
+SpotifyService::SpotifyService(Application *app, QObject *parent)
+    : StreamingService(Song::Source::Spotify, QStringLiteral("Spotify"), QStringLiteral("spotify"), QLatin1String(SpotifySettingsPage::kSettingsGroup), SettingsDialog::Page::Spotify, app, parent),
+      app_(app),
+      network_(new NetworkAccessManager(this)),
+      artists_collection_backend_(nullptr),
+      albums_collection_backend_(nullptr),
+      songs_collection_backend_(nullptr),
+      artists_collection_model_(nullptr),
+      albums_collection_model_(nullptr),
+      songs_collection_model_(nullptr),
+      timer_search_delay_(new QTimer(this)),
+      timer_refresh_login_(new QTimer(this)),
+      favorite_request_(new SpotifyFavoriteRequest(this, network_, this)),
+      enabled_(false),
+      artistssearchlimit_(1),
+      albumssearchlimit_(1),
+      songssearchlimit_(1),
+      fetchalbums_(true),
+      download_album_covers_(true),
+      expires_in_(0),
+      login_time_(0),
+      pending_search_id_(0),
+      next_pending_search_id_(1),
+      pending_search_type_(StreamingSearchView::SearchType::Artists),
+      search_id_(0),
+      server_(nullptr) {
+
+  // Backends
+
+  artists_collection_backend_ = make_shared<CollectionBackend>();
+  artists_collection_backend_->moveToThread(app_->database()->thread());
+  artists_collection_backend_->Init(app_->database(), app->task_manager(), Song::Source::Spotify, QLatin1String(kArtistsSongsTable));
+
+  albums_collection_backend_ = make_shared<CollectionBackend>();
+  albums_collection_backend_->moveToThread(app_->database()->thread());
+  albums_collection_backend_->Init(app_->database(), app->task_manager(), Song::Source::Spotify, QLatin1String(kAlbumsSongsTable));
+
+  songs_collection_backend_ = make_shared<CollectionBackend>();
+  songs_collection_backend_->moveToThread(app_->database()->thread());
+  songs_collection_backend_->Init(app_->database(), app->task_manager(), Song::Source::Spotify, QLatin1String(kSongsTable));
+
+  // Models
+  artists_collection_model_ = new CollectionModel(artists_collection_backend_, app_, this);
+  albums_collection_model_ = new CollectionModel(albums_collection_backend_, app_, this);
+  songs_collection_model_ = new CollectionModel(songs_collection_backend_, app_, this);
+
+  timer_refresh_login_->setSingleShot(true);
+  QObject::connect(timer_refresh_login_, &QTimer::timeout, this, &SpotifyService::RequestNewAccessToken);
+
+  timer_search_delay_->setSingleShot(true);
+  QObject::connect(timer_search_delay_, &QTimer::timeout, this, &SpotifyService::StartSearch);
+
+  QObject::connect(this, &SpotifyService::AddArtists, favorite_request_, &SpotifyFavoriteRequest::AddArtists);
+  QObject::connect(this, &SpotifyService::AddAlbums, favorite_request_, &SpotifyFavoriteRequest::AddAlbums);
+  QObject::connect(this, &SpotifyService::AddSongs, favorite_request_, QOverload<const SongList&>::of(&SpotifyFavoriteRequest::AddSongs));
+
+  QObject::connect(this, &SpotifyService::RemoveArtists, favorite_request_, &SpotifyFavoriteRequest::RemoveArtists);
+  QObject::connect(this, &SpotifyService::RemoveAlbums, favorite_request_, &SpotifyFavoriteRequest::RemoveAlbums);
+  QObject::connect(this, &SpotifyService::RemoveSongsByList, favorite_request_, QOverload<const SongList&>::of(&SpotifyFavoriteRequest::RemoveSongs));
+  QObject::connect(this, &SpotifyService::RemoveSongsByMap, favorite_request_, QOverload<const SongMap&>::of(&SpotifyFavoriteRequest::RemoveSongs));
+
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::ArtistsAdded, &*artists_collection_backend_, &CollectionBackend::AddOrUpdateSongs);
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::AlbumsAdded, &*albums_collection_backend_, &CollectionBackend::AddOrUpdateSongs);
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::SongsAdded, &*songs_collection_backend_, &CollectionBackend::AddOrUpdateSongs);
+
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::ArtistsRemoved, &*artists_collection_backend_, &CollectionBackend::DeleteSongs);
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::AlbumsRemoved, &*albums_collection_backend_, &CollectionBackend::DeleteSongs);
+  QObject::connect(favorite_request_, &SpotifyFavoriteRequest::SongsRemoved, &*songs_collection_backend_, &CollectionBackend::DeleteSongs);
+
+  SpotifyService::ReloadSettings();
+  LoadSession();
+
+}
+
+SpotifyService::~SpotifyService() {
+
+  while (!replies_.isEmpty()) {
+    QNetworkReply *reply = replies_.takeFirst();
+    QObject::disconnect(reply, nullptr, this, nullptr);
+    reply->abort();
+    reply->deleteLater();
+  }
+
+  artists_collection_backend_->deleteLater();
+  albums_collection_backend_->deleteLater();
+  songs_collection_backend_->deleteLater();
+
+}
+
+void SpotifyService::Exit() {
+
+  wait_for_exit_ << &*artists_collection_backend_ << &*albums_collection_backend_ << &*songs_collection_backend_;
+
+  QObject::connect(&*artists_collection_backend_, &CollectionBackend::ExitFinished, this, &SpotifyService::ExitReceived);
+  QObject::connect(&*albums_collection_backend_, &CollectionBackend::ExitFinished, this, &SpotifyService::ExitReceived);
+  QObject::connect(&*songs_collection_backend_, &CollectionBackend::ExitFinished, this, &SpotifyService::ExitReceived);
+
+  artists_collection_backend_->ExitAsync();
+  albums_collection_backend_->ExitAsync();
+  songs_collection_backend_->ExitAsync();
+
+}
+
+void SpotifyService::ExitReceived() {
+
+  QObject *obj = sender();
+  QObject::disconnect(obj, nullptr, this, nullptr);
+  qLog(Debug) << obj << "successfully exited.";
+  wait_for_exit_.removeAll(obj);
+  if (wait_for_exit_.isEmpty()) emit ExitFinished();
+
+}
+
+void SpotifyService::ShowConfig() {
+  app_->OpenSettingsDialogAtPage(SettingsDialog::Page::Spotify);
+}
+
+void SpotifyService::LoadSession() {
+
+  refresh_login_timer_.setSingleShot(true);
+  QObject::connect(&refresh_login_timer_, &QTimer::timeout, this, &SpotifyService::RequestNewAccessToken);
+
+  Settings s;
+  s.beginGroup(SpotifySettingsPage::kSettingsGroup);
+  access_token_ = s.value("access_token").toString();
+  refresh_token_ = s.value("refresh_token").toString();
+  expires_in_ = s.value("expires_in").toLongLong();
+  login_time_ = s.value("login_time").toLongLong();
+  s.endGroup();
+
+  if (!refresh_token_.isEmpty()) {
+    qint64 time = static_cast<qint64>(expires_in_) - (QDateTime::currentDateTime().toSecsSinceEpoch() - static_cast<qint64>(login_time_));
+    if (time < 1) time = 1;
+    refresh_login_timer_.setInterval(static_cast<int>(time * kMsecPerSec));
+    refresh_login_timer_.start();
+  }
+
+}
+
+void SpotifyService::ReloadSettings() {
+
+  Settings s;
+  s.beginGroup(SpotifySettingsPage::kSettingsGroup);
+
+  enabled_ = s.value("enabled", false).toBool();
+
+  quint64 search_delay = std::max(s.value("searchdelay", 1500).toInt(), 500);
+  artistssearchlimit_ = s.value("artistssearchlimit", 4).toInt();
+  albumssearchlimit_ = s.value("albumssearchlimit", 10).toInt();
+  songssearchlimit_ = s.value("songssearchlimit", 10).toInt();
+  fetchalbums_ = s.value("fetchalbums", false).toBool();
+  download_album_covers_ = s.value("downloadalbumcovers", true).toBool();
+
+  s.endGroup();
+
+  timer_search_delay_->setInterval(static_cast<int>(search_delay));
+
+}
+
+void SpotifyService::Authenticate() {
+
+  QUrl redirect_url(QString::fromLatin1(kOAuthRedirectUrl));
+
+  if (!server_) {
+    server_ = new LocalRedirectServer(this);
+    int port = redirect_url.port();
+    int port_max = port + 10;
+    bool success = false;
+    forever {
+      server_->set_port(port);
+      if (server_->Listen()) {
+        success = true;
+        break;
+      }
+      ++port;
+      if (port > port_max) break;
+    }
+    if (!success) {
+      LoginError(server_->error());
+      server_->deleteLater();
+      server_ = nullptr;
+      return;
+    }
+    QObject::connect(server_, &LocalRedirectServer::Finished, this, &SpotifyService::RedirectArrived);
+  }
+
+  code_verifier_ = Utilities::CryptographicRandomString(44);
+  code_challenge_ = QString::fromLatin1(QCryptographicHash::hash(code_verifier_.toUtf8(), QCryptographicHash::Sha256).toBase64(QByteArray::Base64UrlEncoding));
+  if (code_challenge_.lastIndexOf(QLatin1Char('=')) == code_challenge_.length() - 1) {
+    code_challenge_.chop(1);
+  }
+
+  const ParamList params = ParamList() << Param(QStringLiteral("client_id"), QString::fromLatin1(QByteArray::fromBase64(kClientIDB64)))
+                                       << Param(QStringLiteral("response_type"), QStringLiteral("code"))
+                                       << Param(QStringLiteral("redirect_uri"), redirect_url.toString())
+                                       << Param(QStringLiteral("state"), code_challenge_)
+                                       << Param(QStringLiteral("scope"), QStringLiteral("user-follow-read user-follow-modify user-library-read user-library-modify streaming"));
+
+  QUrlQuery url_query;
+  for (const Param &param : params) {
+    url_query.addQueryItem(QString::fromLatin1(QUrl::toPercentEncoding(param.first)), QString::fromLatin1(QUrl::toPercentEncoding(param.second)));
+  }
+
+  QUrl url(QString::fromLatin1(kOAuthAuthorizeUrl));
+  url.setQuery(url_query);
+
+  const bool result = QDesktopServices::openUrl(url);
+  if (!result) {
+    QMessageBox messagebox(QMessageBox::Information, tr("Spotify Authentication"), tr("Please open this URL in your browser") + QStringLiteral(":<br /><a href=\"%1\">%1</a>").arg(url.toString()), QMessageBox::Ok);
+    messagebox.setTextFormat(Qt::RichText);
+    messagebox.exec();
+  }
+
+}
+
+void SpotifyService::Deauthenticate() {
+
+  access_token_.clear();
+  refresh_token_.clear();
+  expires_in_ = 0;
+  login_time_ = 0;
+
+  Settings s;
+  s.beginGroup(SpotifySettingsPage::kSettingsGroup);
+  s.remove("access_token");
+  s.remove("refresh_token");
+  s.remove("expires_in");
+  s.remove("login_time");
+  s.endGroup();
+
+  refresh_login_timer_.stop();
+
+}
+
+void SpotifyService::RedirectArrived() {
+
+  if (!server_) return;
+
+  if (server_->error().isEmpty()) {
+    QUrl url = server_->request_url();
+    if (url.isValid()) {
+      QUrlQuery url_query(url);
+      if (url_query.hasQueryItem(QStringLiteral("error"))) {
+        LoginError(QUrlQuery(url).queryItemValue(QStringLiteral("error")));
+      }
+      else if (url_query.hasQueryItem(QStringLiteral("code")) && url_query.hasQueryItem(QStringLiteral("state"))) {
+        qLog(Debug) << "Spotify: Authorization URL Received" << url;
+        QString code = url_query.queryItemValue(QStringLiteral("code"));
+        QUrl redirect_url(QString::fromLatin1(kOAuthRedirectUrl));
+        redirect_url.setPort(server_->url().port());
+        RequestAccessToken(code, redirect_url);
+      }
+      else {
+        LoginError(tr("Redirect missing token code or state!"));
+      }
+    }
+    else {
+      LoginError(tr("Received invalid reply from web browser."));
+    }
+  }
+  else {
+    LoginError(server_->error());
+  }
+
+  server_->close();
+  server_->deleteLater();
+  server_ = nullptr;
+
+}
+
+void SpotifyService::RequestAccessToken(const QString &code, const QUrl &redirect_url) {
+
+  refresh_login_timer_.stop();
+
+  ParamList params = ParamList() << Param(QStringLiteral("client_id"), QString::fromLatin1(QByteArray::fromBase64(kClientIDB64)))
+                                 << Param(QStringLiteral("client_secret"), QString::fromLatin1(QByteArray::fromBase64(kClientSecretB64)));
+
+  if (!code.isEmpty() && !redirect_url.isEmpty()) {
+    params << Param(QStringLiteral("grant_type"), QStringLiteral("authorization_code"));
+    params << Param(QStringLiteral("code"), code);
+    params << Param(QStringLiteral("redirect_uri"), redirect_url.toString());
+  }
+  else if (!refresh_token_.isEmpty() && enabled_) {
+    params << Param(QStringLiteral("grant_type"), QStringLiteral("refresh_token"));
+    params << Param(QStringLiteral("refresh_token"), refresh_token_);
+  }
+  else {
+    return;
+  }
+
+  QUrlQuery url_query;
+  for (const Param &param : params) {
+    url_query.addQueryItem(QString::fromLatin1(QUrl::toPercentEncoding(param.first)), QString::fromLatin1(QUrl::toPercentEncoding(param.second)));
+  }
+
+  QUrl new_url(QString::fromLatin1(kOAuthAccessTokenUrl));
+  QNetworkRequest req(new_url);
+  req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
+  req.setHeader(QNetworkRequest::ContentTypeHeader, QStringLiteral("application/x-www-form-urlencoded"));
+  QString auth_header_data = QString::fromLatin1(QByteArray::fromBase64(kClientIDB64)) + QLatin1Char(':') + QString::fromLatin1(QByteArray::fromBase64(kClientSecretB64));
+  req.setRawHeader("Authorization", "Basic " + auth_header_data.toUtf8().toBase64());
+
+  QByteArray query = url_query.toString(QUrl::FullyEncoded).toUtf8();
+
+  QNetworkReply *reply = network_->post(req, query);
+  replies_ << reply;
+  QObject::connect(reply, &QNetworkReply::sslErrors, this, &SpotifyService::HandleLoginSSLErrors);
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply]() { AccessTokenRequestFinished(reply); });
+
+}
+
+void SpotifyService::HandleLoginSSLErrors(const QList<QSslError> &ssl_errors) {
+
+  for (const QSslError &ssl_error : ssl_errors) {
+    login_errors_ += ssl_error.errorString();
+  }
+
+}
+
+void SpotifyService::AccessTokenRequestFinished(QNetworkReply *reply) {
+
+  if (!replies_.contains(reply)) return;
+  replies_.removeAll(reply);
+  QObject::disconnect(reply, nullptr, this, nullptr);
+  reply->deleteLater();
+
+  if (reply->error() != QNetworkReply::NoError || reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() != 200) {
+    if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
+      // This is a network error, there is nothing more to do.
+      LoginError(QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
+      return;
+    }
+    else {
+      // See if there is Json data containing "error" and "error_description" then use that instead.
+      QByteArray data = reply->readAll();
+      QJsonParseError json_error;
+      QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
+      if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
+        QJsonObject json_obj = json_doc.object();
+        if (!json_obj.isEmpty() && json_obj.contains(QLatin1String("error")) && json_obj.contains(QLatin1String("error_description"))) {
+          QString error = json_obj[QLatin1String("error")].toString();
+          QString error_description = json_obj[QLatin1String("error_description")].toString();
+          login_errors_ << QStringLiteral("Authentication failure: %1 (%2)").arg(error, error_description);
+        }
+      }
+      if (login_errors_.isEmpty()) {
+        if (reply->error() != QNetworkReply::NoError) {
+          login_errors_ << QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error());
+        }
+        else {
+          login_errors_ << QStringLiteral("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
+        }
+      }
+      LoginError();
+      return;
+    }
+  }
+
+  QByteArray data = reply->readAll();
+
+  QJsonParseError json_error;
+  QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
+
+  if (json_error.error != QJsonParseError::NoError) {
+    Error(QStringLiteral("Failed to parse Json data in authentication reply: %1").arg(json_error.errorString()));
+    return;
+  }
+
+  if (json_doc.isEmpty()) {
+    LoginError(QStringLiteral("Authentication reply from server has empty Json document."));
+    return;
+  }
+
+  if (!json_doc.isObject()) {
+    LoginError(QStringLiteral("Authentication reply from server has Json document that is not an object."), json_doc);
+    return;
+  }
+
+  QJsonObject json_obj = json_doc.object();
+  if (json_obj.isEmpty()) {
+    LoginError(QStringLiteral("Authentication reply from server has empty Json object."), json_doc);
+    return;
+  }
+
+  if (!json_obj.contains(QLatin1String("access_token")) || !json_obj.contains(QLatin1String("expires_in"))) {
+    LoginError(QStringLiteral("Authentication reply from server is missing access token or expires in."), json_obj);
+    return;
+  }
+
+  access_token_ = json_obj[QLatin1String("access_token")].toString();
+  if (json_obj.contains(QLatin1String("refresh_token"))) {
+    refresh_token_ = json_obj[QLatin1String("refresh_token")].toString();
+  }
+  expires_in_ = json_obj[QLatin1String("expires_in")].toInt();
+  login_time_ = QDateTime::currentDateTime().toSecsSinceEpoch();
+
+  Settings s;
+  s.beginGroup(SpotifySettingsPage::kSettingsGroup);
+  s.setValue("access_token", access_token_);
+  s.setValue("refresh_token", refresh_token_);
+  s.setValue("expires_in", expires_in_);
+  s.setValue("login_time", login_time_);
+  s.endGroup();
+
+  if (expires_in_ > 0) {
+    refresh_login_timer_.setInterval(static_cast<int>(expires_in_ * kMsecPerSec));
+    refresh_login_timer_.start();
+  }
+
+  qLog(Debug) << "Spotify: Authentication was successful, login expires in" << expires_in_;
+
+  emit LoginComplete(true);
+  emit LoginSuccess();
+
+}
+
+void SpotifyService::ResetArtistsRequest() {
+
+  if (artists_request_) {
+    QObject::disconnect(&*artists_request_, nullptr, this, nullptr);
+    QObject::disconnect(this, nullptr, &*artists_request_, nullptr);
+    artists_request_.reset();
+  }
+
+}
+
+void SpotifyService::GetArtists() {
+
+  if (!authenticated()) {
+    emit ArtistsResults(SongMap(), tr("Not authenticated with Spotify."));
+    ShowConfig();
+    return;
+  }
+
+  ResetArtistsRequest();
+  artists_request_.reset(new SpotifyRequest(this, app_, network_, SpotifyBaseRequest::QueryType::Artists, this), [](SpotifyRequest *request) { request->deleteLater(); });
+  QObject::connect(&*artists_request_, &SpotifyRequest::Results, this, &SpotifyService::ArtistsResultsReceived);
+  QObject::connect(&*artists_request_, &SpotifyRequest::UpdateStatus, this, &SpotifyService::ArtistsUpdateStatusReceived);
+  QObject::connect(&*artists_request_, &SpotifyRequest::ProgressSetMaximum, this, &SpotifyService::ArtistsProgressSetMaximumReceived);
+  QObject::connect(&*artists_request_, &SpotifyRequest::UpdateProgress, this, &SpotifyService::ArtistsUpdateProgressReceived);
+
+  artists_request_->Process();
+
+}
+
+void SpotifyService::ArtistsResultsReceived(const int id, const SongMap &songs, const QString &error) {
+
+  Q_UNUSED(id);
+  emit ArtistsResults(songs, error);
+  ResetArtistsRequest();
+
+}
+
+void SpotifyService::ArtistsUpdateStatusReceived(const int id, const QString &text) {
+  Q_UNUSED(id);
+  emit ArtistsUpdateStatus(text);
+}
+
+void SpotifyService::ArtistsProgressSetMaximumReceived(const int id, const int max) {
+  Q_UNUSED(id);
+  emit ArtistsProgressSetMaximum(max);
+}
+
+void SpotifyService::ArtistsUpdateProgressReceived(const int id, const int progress) {
+  Q_UNUSED(id);
+  emit ArtistsUpdateProgress(progress);
+}
+
+void SpotifyService::ResetAlbumsRequest() {
+
+  if (albums_request_) {
+    QObject::disconnect(&*albums_request_, nullptr, this, nullptr);
+    QObject::disconnect(this, nullptr, &*albums_request_, nullptr);
+    albums_request_.reset();
+  }
+
+}
+
+void SpotifyService::GetAlbums() {
+
+  if (!authenticated()) {
+    emit AlbumsResults(SongMap(), tr("Not authenticated with Spotify."));
+    ShowConfig();
+    return;
+  }
+
+  ResetAlbumsRequest();
+  albums_request_.reset(new SpotifyRequest(this, app_, network_, SpotifyBaseRequest::QueryType::Albums, this), [](SpotifyRequest *request) { request->deleteLater(); });
+  QObject::connect(&*albums_request_, &SpotifyRequest::Results, this, &SpotifyService::AlbumsResultsReceived);
+  QObject::connect(&*albums_request_, &SpotifyRequest::UpdateStatus, this, &SpotifyService::AlbumsUpdateStatusReceived);
+  QObject::connect(&*albums_request_, &SpotifyRequest::ProgressSetMaximum, this, &SpotifyService::AlbumsProgressSetMaximumReceived);
+  QObject::connect(&*albums_request_, &SpotifyRequest::UpdateProgress, this, &SpotifyService::AlbumsUpdateProgressReceived);
+
+  albums_request_->Process();
+
+}
+
+void SpotifyService::AlbumsResultsReceived(const int id, const SongMap &songs, const QString &error) {
+
+  Q_UNUSED(id);
+  emit AlbumsResults(songs, error);
+  ResetAlbumsRequest();
+
+}
+
+void SpotifyService::AlbumsUpdateStatusReceived(const int id, const QString &text) {
+  Q_UNUSED(id);
+  emit AlbumsUpdateStatus(text);
+}
+
+void SpotifyService::AlbumsProgressSetMaximumReceived(const int id, const int max) {
+  Q_UNUSED(id);
+  emit AlbumsProgressSetMaximum(max);
+}
+
+void SpotifyService::AlbumsUpdateProgressReceived(const int id, const int progress) {
+  Q_UNUSED(id);
+  emit AlbumsUpdateProgress(progress);
+}
+
+void SpotifyService::ResetSongsRequest() {
+
+  if (songs_request_) {
+    QObject::disconnect(&*songs_request_, nullptr, this, nullptr);
+    QObject::disconnect(this, nullptr, &*songs_request_, nullptr);
+    songs_request_.reset();
+  }
+
+}
+
+void SpotifyService::GetSongs() {
+
+  if (!authenticated()) {
+    emit SongsResults(SongMap(), tr("Not authenticated with Spotify."));
+    ShowConfig();
+    return;
+  }
+
+  ResetSongsRequest();
+  songs_request_.reset(new SpotifyRequest(this, app_, network_, SpotifyBaseRequest::QueryType::Songs, this), [](SpotifyRequest *request) { request->deleteLater(); });
+  QObject::connect(&*songs_request_, &SpotifyRequest::Results, this, &SpotifyService::SongsResultsReceived);
+  QObject::connect(&*songs_request_, &SpotifyRequest::UpdateStatus, this, &SpotifyService::SongsUpdateStatusReceived);
+  QObject::connect(&*songs_request_, &SpotifyRequest::ProgressSetMaximum, this, &SpotifyService::SongsProgressSetMaximumReceived);
+  QObject::connect(&*songs_request_, &SpotifyRequest::UpdateProgress, this, &SpotifyService::SongsUpdateProgressReceived);
+
+  songs_request_->Process();
+
+}
+
+void SpotifyService::SongsResultsReceived(const int id, const SongMap &songs, const QString &error) {
+
+  Q_UNUSED(id);
+  emit SongsResults(songs, error);
+  ResetSongsRequest();
+
+}
+
+void SpotifyService::SongsUpdateStatusReceived(const int id, const QString &text) {
+  Q_UNUSED(id);
+  emit SongsUpdateStatus(text);
+}
+
+void SpotifyService::SongsProgressSetMaximumReceived(const int id, const int max) {
+  Q_UNUSED(id);
+  emit SongsProgressSetMaximum(max);
+}
+
+void SpotifyService::SongsUpdateProgressReceived(const int id, const int progress) {
+  Q_UNUSED(id);
+  emit SongsUpdateProgress(progress);
+}
+
+int SpotifyService::Search(const QString &text, StreamingSearchView::SearchType type) {
+
+  pending_search_id_ = next_pending_search_id_;
+  pending_search_text_ = text;
+  pending_search_type_ = type;
+
+  next_pending_search_id_++;
+
+  if (text.isEmpty()) {
+    timer_search_delay_->stop();
+    return pending_search_id_;
+  }
+  timer_search_delay_->start();
+
+  return pending_search_id_;
+
+}
+
+void SpotifyService::StartSearch() {
+
+  if (!authenticated()) {
+    emit SearchResults(pending_search_id_, SongMap(), tr("Not authenticated with Spotify."));
+    ShowConfig();
+    return;
+  }
+
+  search_id_ = pending_search_id_;
+  search_text_ = pending_search_text_;
+
+  SendSearch();
+
+}
+
+void SpotifyService::CancelSearch() {
+}
+
+void SpotifyService::SendSearch() {
+
+  SpotifyBaseRequest::QueryType type = SpotifyBaseRequest::QueryType::None;
+
+  switch (pending_search_type_) {
+    case StreamingSearchView::SearchType::Artists:
+      type = SpotifyBaseRequest::QueryType::SearchArtists;
+      break;
+    case StreamingSearchView::SearchType::Albums:
+      type = SpotifyBaseRequest::QueryType::SearchAlbums;
+      break;
+    case StreamingSearchView::SearchType::Songs:
+      type = SpotifyBaseRequest::QueryType::SearchSongs;
+      break;
+    default:
+      //Error("Invalid search type.");
+      return;
+  }
+
+  search_request_.reset(new SpotifyRequest(this, app_, network_, type, this), [](SpotifyRequest *request) { request->deleteLater(); });
+
+  QObject::connect(search_request_.get(), &SpotifyRequest::Results, this, &SpotifyService::SearchResultsReceived);
+  QObject::connect(search_request_.get(), &SpotifyRequest::UpdateStatus, this, &SpotifyService::SearchUpdateStatus);
+  QObject::connect(search_request_.get(), &SpotifyRequest::ProgressSetMaximum, this, &SpotifyService::SearchProgressSetMaximum);
+  QObject::connect(search_request_.get(), &SpotifyRequest::UpdateProgress, this, &SpotifyService::SearchUpdateProgress);
+
+  search_request_->Search(search_id_, search_text_);
+  search_request_->Process();
+
+}
+
+void SpotifyService::SearchResultsReceived(const int id, const SongMap &songs, const QString &error) {
+
+  emit SearchResults(id, songs, error);
+  search_request_.reset();
+
+}
+
+void SpotifyService::LoginError(const QString &error, const QVariant &debug) {
+
+  if (!error.isEmpty()) login_errors_ << error;
+
+  QString error_html;
+  for (const QString &e : login_errors_) {
+    qLog(Error) << "Spotify:" << e;
+    error_html += e + QLatin1String("<br />");
+  }
+  if (debug.isValid()) qLog(Debug) << debug;
+
+  emit LoginFailure(error_html);
+  emit LoginComplete(false);
+
+  login_errors_.clear();
+
+}

src/spotify/spotifyservice.h

@@ -0,0 +1,192 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2022-2024, 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 SPOTIFYSERVICE_H
+#define SPOTIFYSERVICE_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QPair>
+#include <QSet>
+#include <QList>
+#include <QMap>
+#include <QVariant>
+#include <QByteArray>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QDateTime>
+#include <QSslError>
+#include <QTimer>
+
+#include "core/shared_ptr.h"
+#include "core/song.h"
+#include "streaming/streamingservice.h"
+#include "streaming/streamingsearchview.h"
+#include "settings/spotifysettingspage.h"
+
+class QNetworkReply;
+
+class Application;
+class NetworkAccessManager;
+class SpotifyRequest;
+class SpotifyFavoriteRequest;
+class SpotifyStreamURLRequest;
+class CollectionBackend;
+class CollectionModel;
+class CollectionFilter;
+class LocalRedirectServer;
+
+class SpotifyService : public StreamingService {
+  Q_OBJECT
+
+ public:
+  explicit SpotifyService(Application *app, QObject *parent = nullptr);
+  ~SpotifyService() override;
+
+  static const Song::Source kSource;
+  static const char kApiUrl[];
+
+  void Exit() override;
+  void ReloadSettings() override;
+
+  int Search(const QString &text, StreamingSearchView::SearchType type) override;
+  void CancelSearch() override;
+
+  Application *app() { return app_; }
+
+  int artistssearchlimit() { return artistssearchlimit_; }
+  int albumssearchlimit() { return albumssearchlimit_; }
+  int songssearchlimit() { return songssearchlimit_; }
+  bool fetchalbums() { return fetchalbums_; }
+  bool download_album_covers() { return download_album_covers_; }
+
+  QString access_token() { return access_token_; }
+
+  bool authenticated() const override { return !access_token_.isEmpty(); }
+
+  SharedPtr<CollectionBackend> artists_collection_backend() override { return artists_collection_backend_; }
+  SharedPtr<CollectionBackend> albums_collection_backend() override { return albums_collection_backend_; }
+  SharedPtr<CollectionBackend> songs_collection_backend() override { return songs_collection_backend_; }
+
+  CollectionModel *artists_collection_model() override { return artists_collection_model_; }
+  CollectionModel *albums_collection_model() override { return albums_collection_model_; }
+  CollectionModel *songs_collection_model() override { return songs_collection_model_; }
+
+  CollectionFilter *artists_collection_filter_model() override { return artists_collection_model_->filter(); }
+  CollectionFilter *albums_collection_filter_model() override { return albums_collection_model_->filter(); }
+  CollectionFilter *songs_collection_filter_model() override { return songs_collection_model_->filter(); }
+
+ public slots:
+  void ShowConfig() override;
+  void Authenticate();
+  void Deauthenticate();
+  void GetArtists() override;
+  void GetAlbums() override;
+  void GetSongs() override;
+  void ResetArtistsRequest() override;
+  void ResetAlbumsRequest() override;
+  void ResetSongsRequest() override;
+
+ private slots:
+  void ExitReceived();
+  void RedirectArrived();
+  void RequestNewAccessToken() { RequestAccessToken(); }
+  void HandleLoginSSLErrors(const QList<QSslError> &ssl_errors);
+  void AccessTokenRequestFinished(QNetworkReply *reply);
+  void StartSearch();
+  void ArtistsResultsReceived(const int id, const SongMap &songs, const QString &error);
+  void AlbumsResultsReceived(const int id, const SongMap &songs, const QString &error);
+  void SongsResultsReceived(const int id, const SongMap &songs, const QString &error);
+  void SearchResultsReceived(const int id, const SongMap &songs, const QString &error);
+  void ArtistsUpdateStatusReceived(const int id, const QString &text);
+  void AlbumsUpdateStatusReceived(const int id, const QString &text);
+  void SongsUpdateStatusReceived(const int id, const QString &text);
+  void ArtistsProgressSetMaximumReceived(const int id, const int max);
+  void AlbumsProgressSetMaximumReceived(const int id, const int max);
+  void SongsProgressSetMaximumReceived(const int id, const int max);
+  void ArtistsUpdateProgressReceived(const int id, const int progress);
+  void AlbumsUpdateProgressReceived(const int id, const int progress);
+  void SongsUpdateProgressReceived(const int id, const int progress);
+
+ private:
+  typedef QPair<QString, QString> Param;
+  typedef QList<Param> ParamList;
+
+  void LoadSession();
+  void RequestAccessToken(const QString &code = QString(), const QUrl &redirect_url = QUrl());
+  void SendSearch();
+  void LoginError(const QString &error = QString(), const QVariant &debug = QVariant());
+
+  Application *app_;
+  NetworkAccessManager *network_;
+
+  SharedPtr<CollectionBackend> artists_collection_backend_;
+  SharedPtr<CollectionBackend> albums_collection_backend_;
+  SharedPtr<CollectionBackend> songs_collection_backend_;
+
+  CollectionModel *artists_collection_model_;
+  CollectionModel *albums_collection_model_;
+  CollectionModel *songs_collection_model_;
+
+  QTimer *timer_search_delay_;
+  QTimer *timer_refresh_login_;
+
+  SharedPtr<SpotifyRequest> artists_request_;
+  SharedPtr<SpotifyRequest> albums_request_;
+  SharedPtr<SpotifyRequest> songs_request_;
+  SharedPtr<SpotifyRequest> search_request_;
+  SpotifyFavoriteRequest *favorite_request_;
+
+  bool enabled_;
+  int artistssearchlimit_;
+  int albumssearchlimit_;
+  int songssearchlimit_;
+  bool fetchalbums_;
+  bool download_album_covers_;
+
+  QString access_token_;
+  QString refresh_token_;
+  quint64 expires_in_;
+  quint64 login_time_;
+
+  int pending_search_id_;
+  int next_pending_search_id_;
+  QString pending_search_text_;
+  StreamingSearchView::SearchType pending_search_type_;
+
+  int search_id_;
+  QString search_text_;
+
+  QString code_verifier_;
+  QString code_challenge_;
+
+  LocalRedirectServer *server_;
+  QStringList login_errors_;
+  QTimer refresh_login_timer_;
+
+  QList<QObject*> wait_for_exit_;
+  QList<QNetworkReply*> replies_;
+};
+
+using SpotifyServicePtr = SharedPtr<SpotifyService>;
+
+#endif  // SPOTIFYSERVICE_H