diff --git a/src/lyrics/lyricsprovider.cpp b/src/lyrics/lyricsprovider.cpp index 24f7ec115..5eb9d5fe0 100644 --- a/src/lyrics/lyricsprovider.cpp +++ b/src/lyrics/lyricsprovider.cpp @@ -21,9 +21,55 @@ #include #include +#include +#include "core/utilities.h" #include "core/networkaccessmanager.h" #include "lyricsprovider.h" LyricsProvider::LyricsProvider(const QString &name, const bool enabled, const bool authentication_required, NetworkAccessManager *network, QObject *parent) : QObject(parent), network_(network), name_(name), enabled_(enabled), order_(0), authentication_required_(authentication_required) {} + +QString LyricsProvider::ParseLyricsFromHTML(const QString &content, const QRegularExpression &start_tag, const QRegularExpression &end_tag, const QRegularExpression &lyrics_start) { + + QRegularExpressionMatch rematch = lyrics_start.match(content); + if (!rematch.hasMatch()) return QString(); + + const qint64 start_lyrics_tag_idx = rematch.capturedEnd(); + + // Find the index of the end tag. + qint64 start_tag_idx = 0; + qint64 end_tag_idx = 0; + qint64 idx = start_lyrics_tag_idx; + int tags = 1; + do { + QRegularExpressionMatch rematch_start_tag = QRegularExpression(start_tag).match(content, idx); + start_tag_idx = rematch_start_tag.hasMatch() ? rematch_start_tag.capturedStart() : -1; + QRegularExpressionMatch rematch_end_tag = QRegularExpression(end_tag).match(content, idx); + end_tag_idx = rematch_end_tag.hasMatch() ? rematch_end_tag.capturedStart() : -1; + if (rematch_start_tag.hasMatch() && start_tag_idx <= end_tag_idx) { + ++tags; + idx = start_tag_idx + rematch_start_tag.capturedLength(); + } + else if (rematch_end_tag.hasMatch()) { + --tags; + idx = end_tag_idx + rematch_end_tag.capturedLength(); + } + } + while (tags > 0 || end_tag_idx >= start_tag_idx); + + if (end_tag_idx <= 0 || start_lyrics_tag_idx >= end_tag_idx) return QString(); + + QString lyrics = content.mid(start_lyrics_tag_idx, end_tag_idx - start_lyrics_tag_idx) + .replace(QRegularExpression("]+>"), "\n") + .remove(QRegularExpression("<[^>]*>")) + .trimmed(); + + if (lyrics.length() > 6000 || lyrics.contains("there are no lyrics to", Qt::CaseInsensitive)) { + return QString(); + } + + return Utilities::DecodeHtmlEntities(lyrics); + +} + diff --git a/src/lyrics/lyricsprovider.h b/src/lyrics/lyricsprovider.h index 2ca91c318..f4446d27d 100644 --- a/src/lyrics/lyricsprovider.h +++ b/src/lyrics/lyricsprovider.h @@ -28,6 +28,7 @@ #include #include #include +#include #include "lyricsfetcher.h" @@ -55,6 +56,9 @@ class LyricsProvider : public QObject { virtual void Error(const QString &error, const QVariant &debug = QVariant()) = 0; + protected: + QString ParseLyricsFromHTML(const QString &content, const QRegularExpression &start_tag, const QRegularExpression &end_tag, const QRegularExpression &lyrics_start); + signals: void AuthenticationComplete(bool, QStringList = QStringList()); void AuthenticationSuccess();