Add lyrics from lololyrics.com

src/CMakeLists.txt

@@ -210,6 +210,7 @@ set(SOURCES
   lyrics/jsonlyricsprovider.cpp
   lyrics/auddlyricsprovider.cpp
   lyrics/ovhlyricsprovider.cpp
+  lyrics/lololyricsprovider.cpp
 
   settings/settingsdialog.cpp
   settings/settingspage.cpp
@@ -393,6 +394,7 @@ set(HEADERS
   lyrics/jsonlyricsprovider.h
   lyrics/auddlyricsprovider.h
   lyrics/ovhlyricsprovider.h
+  lyrics/lololyricsprovider.h
 
   settings/settingsdialog.h
   settings/settingspage.h

src/core/application.cpp

@@ -60,6 +60,7 @@
 #include "lyrics/lyricsprovider.h"
 #include "lyrics/auddlyricsprovider.h"
 #include "lyrics/ovhlyricsprovider.h"
+#include "lyrics/lololyricsprovider.h"
 
 #include "scrobbler/audioscrobbler.h"
 
@@ -137,6 +138,7 @@ class ApplicationImpl {
           LyricsProviders *lyrics_providers = new LyricsProviders(app);
           lyrics_providers->AddProvider(new AuddLyricsProvider(app));
           lyrics_providers->AddProvider(new OVHLyricsProvider(app));
+          lyrics_providers->AddProvider(new LoloLyricsProvider(app));
           return lyrics_providers;
         }),
         internet_services_([=]() {

src/lyrics/lololyricsprovider.cpp

@@ -0,0 +1,137 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019, 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 <QVariant>
+#include <QString>
+#include <QUrl>
+#include <QUrlQuery>
+#include <QNetworkAccessManager>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QXmlStreamReader>
+
+#include "core/closure.h"
+#include "core/logging.h"
+#include "core/network.h"
+#include "lyricsprovider.h"
+#include "lyricsfetcher.h"
+#include "lololyricsprovider.h"
+
+const char *LoloLyricsProvider::kUrlSearch = "http://api.lololyrics.com/0.5/getLyric";
+
+LoloLyricsProvider::LoloLyricsProvider(QObject *parent) : LyricsProvider("LoloLyrics", parent), network_(new NetworkAccessManager(this)) {}
+
+bool LoloLyricsProvider::StartSearch(const QString &artist, const QString &album, const QString &title, const quint64 id) {
+
+  const ParamList params = ParamList() << Param("artist", artist)
+                                       << Param("track", title);
+
+  QUrlQuery url_query;
+  for (const Param &param : params) {
+    url_query.addQueryItem(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
+  }
+
+  QUrl url(kUrlSearch);
+  url.setQuery(url_query);
+  QNetworkReply *reply = network_->get(QNetworkRequest(url));
+  NewClosure(reply, SIGNAL(finished()), this, SLOT(HandleSearchReply(QNetworkReply*, const quint64, const QString&, const QString&)), reply, id, artist, title);
+
+  //qLog(Debug) << "LoloLyrics: Sending request for" << url;
+
+  return true;
+
+}
+
+void LoloLyricsProvider::CancelSearch(const quint64 id) {}
+
+void LoloLyricsProvider::HandleSearchReply(QNetworkReply *reply, const quint64 id, const QString &artist, const QString &title) {
+
+  reply->deleteLater();
+
+  QByteArray data;
+  QString failure_reason;
+
+  if (reply->error() != QNetworkReply::NoError) {
+    failure_reason = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
+    if (reply->error() < 200) {
+      Error(id, failure_reason);
+      return;
+    }
+  }
+  else if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() != 200) {
+    failure_reason = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
+  }
+
+  data = reply->readAll();
+  LyricsSearchResults results;
+
+  if (!data.isEmpty()) {
+    QXmlStreamReader reader(data);
+    LyricsSearchResult result;
+    QString status;
+    while (!reader.atEnd()) {
+      QXmlStreamReader::TokenType type = reader.readNext();
+      QStringRef name = reader.name();
+      if (type == QXmlStreamReader::StartElement) {
+        if (name == "result") {
+          status.clear();
+          result = LyricsSearchResult();
+        }
+        else if (name == "status") {
+          status = reader.readElementText();
+        }
+        else if (name == "response") {
+          if (status == "OK") {
+            result.lyrics = reader.readElementText();
+          }
+          else {
+            failure_reason = reader.readElementText();
+            result = LyricsSearchResult();
+          }
+        }
+      }
+      else if (type == QXmlStreamReader::EndElement) {
+         if (name == "result") {
+           if (!result.lyrics.isEmpty()) {
+             results << result;
+           }
+           result = LyricsSearchResult();
+         }
+      }
+    }
+  }
+
+  if (results.isEmpty()) qLog(Debug) << "LoloLyrics: No lyrics for" << artist << title << failure_reason;
+  else qLog(Debug) << "LoloLyrics: Got lyrics for" << artist << title;
+
+  emit SearchFinished(id, results);
+
+}
+
+void LoloLyricsProvider::Error(const quint64 id, const QString &error, QVariant debug) {
+
+  qLog(Error) << "LoloLyrics:" << error;
+  if (debug.isValid()) qLog(Debug) << debug;
+  emit SearchFinished(id, LyricsSearchResults());
+
+}

src/lyrics/lololyricsprovider.h

@@ -0,0 +1,56 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019, 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 LOLOLYRICSPROVIDER_H
+#define LOLOLYRICSPROVIDER_H
+
+#include "config.h"
+
+#include <stdbool.h>
+
+#include <QObject>
+#include <QVariant>
+#include <QString>
+
+#include "lyricsprovider.h"
+#include "lyricsfetcher.h"
+
+class QNetworkAccessManager;
+class QNetworkReply;
+
+class LoloLyricsProvider : public LyricsProvider {
+  Q_OBJECT
+
+ public:
+  explicit LoloLyricsProvider(QObject *parent = nullptr);
+
+  bool StartSearch(const QString &artist, const QString &album, const QString &title, const quint64 id);
+  void CancelSearch(quint64 id);
+
+ private slots:
+  void HandleSearchReply(QNetworkReply *reply, const quint64 id, const QString &artist, const QString &title);
+
+ private:
+  static const char *kUrlSearch;
+  QNetworkAccessManager *network_;
+  void Error(const quint64 id, const QString &error, QVariant debug = QVariant());
+
+};
+
+#endif  // LOLOLYRICSPROVIDER_H