Add lyrics from stands4 (lyrics.com)

src/CMakeLists.txt

@@ -177,6 +177,7 @@ set(SOURCES
   lyrics/geniuslyricsprovider.cpp
   lyrics/musixmatchlyricsprovider.cpp
   lyrics/chartlyricsprovider.cpp
+  lyrics/stands4lyricsprovider.cpp
 
   providers/musixmatchprovider.cpp
 
@@ -413,6 +414,7 @@ set(HEADERS
   lyrics/geniuslyricsprovider.h
   lyrics/musixmatchlyricsprovider.h
   lyrics/chartlyricsprovider.h
+  lyrics/stands4lyricsprovider.h
 
   settings/settingsdialog.h
   settings/settingspage.h

src/core/application.cpp

@@ -63,6 +63,7 @@
 #include "lyrics/lololyricsprovider.h"
 #include "lyrics/musixmatchlyricsprovider.h"
 #include "lyrics/chartlyricsprovider.h"
+#include "lyrics/stands4lyricsprovider.h"
 
 #include "scrobbler/audioscrobbler.h"
 #include "scrobbler/lastfmimport.h"
@@ -154,6 +155,7 @@ class ApplicationImpl {
           lyrics_providers->AddProvider(new LoloLyricsProvider(lyrics_providers->network(), app));
           lyrics_providers->AddProvider(new MusixmatchLyricsProvider(lyrics_providers->network(), app));
           lyrics_providers->AddProvider(new ChartLyricsProvider(lyrics_providers->network(), app));
+          lyrics_providers->AddProvider(new Stands4LyricsProvider(lyrics_providers->network(), app));
           lyrics_providers->ReloadSettings();
           return lyrics_providers;
         }),

src/lyrics/stands4lyricsprovider.cpp

@@ -0,0 +1,126 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2023, 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 <QObject>
+#include <QByteArray>
+#include <QVariant>
+#include <QString>
+#include <QUrl>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QRegularExpression>
+
+#include "core/logging.h"
+#include "core/networkaccessmanager.h"
+#include "utilities/strutils.h"
+#include "lyricsfetcher.h"
+#include "lyricsprovider.h"
+#include "stands4lyricsprovider.h"
+
+const char *Stands4LyricsProvider::kUrl = "https://www.lyrics.com/lyrics/";
+
+Stands4LyricsProvider::Stands4LyricsProvider(NetworkAccessManager *network, QObject *parent) : LyricsProvider("Stands4Lyrics", true, false, network, parent) {}
+
+Stands4LyricsProvider::~Stands4LyricsProvider() {
+
+  while (!replies_.isEmpty()) {
+    QNetworkReply *reply = replies_.takeFirst();
+    QObject::disconnect(reply, nullptr, this, nullptr);
+    reply->abort();
+    reply->deleteLater();
+  }
+
+}
+
+bool Stands4LyricsProvider::StartSearch(const QString &artist, const QString &album, const QString &title, const int id) {
+
+  Q_UNUSED(album);
+
+  QUrl url(kUrl + StringFixup(artist) + "/" + StringFixup(title) + ".html");
+  QNetworkRequest req(url);
+  req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
+  QNetworkReply *reply = network_->get(req);
+  replies_ << reply;
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, id, artist, title]() { HandleSearchReply(reply, id, artist, title); });
+
+  qLog(Debug) << "Stands4Lyrics: Sending request for" << url;
+
+  return true;
+
+}
+
+void Stands4LyricsProvider::CancelSearch(const int id) { Q_UNUSED(id); }
+
+void Stands4LyricsProvider::HandleSearchReply(QNetworkReply *reply, const int id, const QString &artist, const QString &title) {
+
+  if (!replies_.contains(reply)) return;
+  replies_.removeAll(reply);
+  QObject::disconnect(reply, nullptr, this, nullptr);
+  reply->deleteLater();
+
+  if (reply->error() != QNetworkReply::NoError) {
+    Error(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
+    emit SearchFinished(id, LyricsSearchResults());
+    return;
+  }
+  else if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() != 200) {
+    Error(QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt()));
+    emit SearchFinished(id, LyricsSearchResults());
+    return;
+  }
+
+  const QByteArray data = reply->readAll();
+  if (data.isEmpty()) {
+    Error("Empty reply received from server.");
+    emit SearchFinished(id, LyricsSearchResults());
+    return;
+  }
+
+  const QString lyrics = ParseLyricsFromHTML(QString::fromUtf8(data), QRegularExpression("<div[^>]*>"), QRegularExpression("<\\/div>"), QRegularExpression("<div id=\"lyrics\"[^>]+>"), false);
+  if (lyrics.isEmpty() || lyrics.contains("Click to search for the Lyrics on Lyrics.com", Qt::CaseInsensitive)) {
+    qLog(Debug) << "Stands4Lyrics: No lyrics for" << artist << title;
+    return;
+  }
+
+  qLog(Debug) << "Stands4Lyrics: Got lyrics for" << artist << title;
+
+  LyricsSearchResult result;
+  result.lyrics = lyrics;
+  emit SearchFinished(id, LyricsSearchResults() << result);
+
+}
+
+QString Stands4LyricsProvider::StringFixup(QString string) {
+
+  return string.replace('/', '-')
+    .replace('\'', '-')
+    .remove(QRegularExpression("[^\\w0-9\\- ]", QRegularExpression::UseUnicodePropertiesOption))
+    .simplified()
+    .replace(' ', '-')
+    .replace(QRegularExpression("(-)\\1+"), "-")
+    .toLower();
+
+}
+
+void Stands4LyricsProvider::Error(const QString &error, const QVariant &debug) {
+
+  qLog(Error) << "Stands4Lyrics:" << error;
+  if (debug.isValid()) qLog(Debug) << debug;
+
+}

src/lyrics/stands4lyricsprovider.h

@@ -0,0 +1,57 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2023, 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 STANDS4LYRICSPROVIDER_H
+#define STANDS4LYRICSPROVIDER_H
+
+#include <QtGlobal>
+#include <QObject>
+#include <QList>
+#include <QVariant>
+#include <QString>
+
+#include "lyricsprovider.h"
+#include "lyricsfetcher.h"
+
+class QNetworkReply;
+class NetworkAccessManager;
+
+class Stands4LyricsProvider : public LyricsProvider {
+  Q_OBJECT
+
+ public:
+  explicit Stands4LyricsProvider(NetworkAccessManager *network, QObject *parent = nullptr);
+  ~Stands4LyricsProvider() override;
+
+  bool StartSearch(const QString &artist, const QString &album, const QString &title, int id) override;
+  void CancelSearch(const int id) override;
+
+ private:
+  void Error(const QString &error, const QVariant &debug = QVariant()) override;
+  static QString StringFixup(QString string);
+
+ private slots:
+  void HandleSearchReply(QNetworkReply *reply, const int id, const QString &artist, const QString &title);
+
+ private:
+  static const char *kUrl;
+  QList<QNetworkReply*> replies_;
+};
+
+#endif  // STANDS4LYRICSPROVIDER_H