Add songlyrics.com lyrics provider

src/lyrics/songlyricscomlyricsprovider.cpp

@@ -0,0 +1,135 @@
+/*
+ * 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 <QUrlQuery>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QRegularExpression>
+
+#include "core/logging.h"
+#include "core/shared_ptr.h"
+#include "core/networkaccessmanager.h"
+#include "lyricssearchrequest.h"
+#include "lyricssearchresult.h"
+#include "songlyricscomlyricsprovider.h"
+
+const char *SongLyricsComLyricsProvider::kUrl = "https://www.songlyrics.com/";
+
+SongLyricsComLyricsProvider::SongLyricsComLyricsProvider(SharedPtr<NetworkAccessManager> network, QObject *parent) : LyricsProvider("songlyrics.com", true, false, network, parent) {}
+
+SongLyricsComLyricsProvider::~SongLyricsComLyricsProvider() {
+
+  while (!replies_.isEmpty()) {
+    QNetworkReply *reply = replies_.takeFirst();
+    QObject::disconnect(reply, nullptr, this, nullptr);
+    reply->abort();
+    reply->deleteLater();
+  }
+
+}
+
+bool SongLyricsComLyricsProvider::StartSearch(const int id, const LyricsSearchRequest &request) {
+
+  SendRequest(id, request, request.artist, request.album, request.title);
+
+  return true;
+
+}
+
+void SongLyricsComLyricsProvider::CancelSearch(const int id) { Q_UNUSED(id); }
+
+void SongLyricsComLyricsProvider::SendRequest(const int id, const LyricsSearchRequest &request, const QString &result_artist, const QString &result_album, const QString &result_title, QUrl url) {
+
+  if (url.isEmpty() || !url.isValid()) {
+    url.setUrl(kUrl + StringFixup(result_artist) + "/" + StringFixup(result_title) + "-lyrics/");
+  }
+
+  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, request, result_artist, result_album, result_title]() { HandleLyricsReply(reply, id, request, result_artist, result_album, result_title); });
+
+}
+
+void SongLyricsComLyricsProvider::HandleLyricsReply(QNetworkReply *reply, const int id, const LyricsSearchRequest &request, const QString &result_artist, const QString &result_album, const QString &result_title) {
+
+  if (!replies_.contains(reply)) return;
+  replies_.removeAll(reply);
+  QObject::disconnect(reply, nullptr, this, nullptr);
+  reply->deleteLater();
+
+  if (reply->error() != QNetworkReply::NoError) {
+    qLog(Error) << "songlyrics.com:" << reply->errorString() << reply->error();
+    emit SearchFinished(id);
+    return;
+  }
+  else if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() != 200) {
+    qLog(Error) << "songlyrics.com: Received HTTP code" << reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    emit SearchFinished(id);
+    return;
+  }
+
+  const QByteArray data = reply->readAll();
+  if (data.isEmpty()) {
+    qLog(Error) << "songlyrics.com: Empty reply received from server.";
+    emit SearchFinished(id);
+    return;
+  }
+
+  const QString lyrics = ParseLyricsFromHTML(QString::fromUtf8(data), QRegularExpression("<p[^>]*>"), QRegularExpression("<\\/p>"), QRegularExpression("<p id=\"songLyricsDiv\"[^>]+>"), false);
+  if (lyrics.isEmpty()) {
+    qLog(Debug) << "songlyrics.com: No lyrics for" << request.artist << request.album << request.title;
+    emit SearchFinished(id);
+    return;
+  }
+
+  qLog(Debug) << "songlyrics.com: Got lyrics for" << request.artist << request.album << request.title;
+
+  LyricsSearchResult result(lyrics);
+  result.artist = result_artist;
+  result.album = result_album;
+  result.title = result_title;
+  emit SearchFinished(id, LyricsSearchResults() << result);
+
+}
+
+QString SongLyricsComLyricsProvider::StringFixup(QString string) {
+
+  return string.replace('/', '-')
+    .replace('\'', '-')
+    .remove(QRegularExpression("[^\\w0-9\\- ]", QRegularExpression::UseUnicodePropertiesOption))
+    .simplified()
+    .replace(' ', '-')
+    .replace(QRegularExpression("(-)\\1+"), "-")
+    .toLower();
+
+}
+
+void SongLyricsComLyricsProvider::Error(const QString &error, const QVariant &debug) {
+
+  qLog(Error) << "songlyrics.com:" << error;
+  if (debug.isValid()) qLog(Debug) << debug;
+
+}