EditTagDialog: Add button to fetch lyrics

Co-Authored-By: Jonas Kvinge <jonas@jkvinge.net>

src/context/contextview.cpp

@@ -631,7 +631,12 @@ void ContextView::UpdateLyrics(const quint64 id, const QString &provider, const
 
   if (static_cast<qint64>(id) != lyrics_id_) return;
 
-  lyrics_ = lyrics + "\n\n(Lyrics from " + provider + ")\n";
+  if (lyrics.isEmpty()) {
+    lyrics_ = "No lyrics found.\n";
+  }
+  else {
+    lyrics_ = lyrics + "\n\n(Lyrics from " + provider + ")\n";
+  }
   lyrics_id_ = -1;
 
   if (action_show_lyrics_->isChecked() && !lyrics_.isEmpty()) {

src/dialogs/edittagdialog.cpp

@@ -87,6 +87,7 @@
 #  include "musicbrainz/tagfetcher.h"
 #  include "trackselectiondialog.h"
 #endif
+#include "lyrics/lyricsfetcher.h"
 #include "covermanager/albumcoverchoicecontroller.h"
 #include "covermanager/albumcoverloader.h"
 #include "covermanager/albumcoverloaderoptions.h"
@@ -112,13 +113,15 @@ EditTagDialog::EditTagDialog(Application *app, QWidget *parent)
       tag_fetcher_(new TagFetcher(app->network(), this)),
       results_dialog_(new TrackSelectionDialog(this)),
 #endif
+      lyrics_fetcher_(new LyricsFetcher(app->lyrics_providers(), this)),
       image_no_cover_thumbnail_(ImageUtils::GenerateNoCoverImage(QSize(128, 128), devicePixelRatioF())),
       loading_(false),
       ignore_edits_(false),
       summary_cover_art_id_(-1),
       tags_cover_art_id_(-1),
       cover_art_is_set_(false),
-      save_tag_pending_(0) {
+      save_tag_pending_(0),
+      lyrics_id_(-1) {
 
   QObject::connect(&*app_->album_cover_loader(), &AlbumCoverLoader::AlbumCoverLoaded, this, &EditTagDialog::AlbumCoverLoaded);
 
@@ -128,6 +131,7 @@ EditTagDialog::EditTagDialog(Application *app, QWidget *parent)
   QObject::connect(results_dialog_, &TrackSelectionDialog::SongChosen, this, &EditTagDialog::FetchTagSongChosen);
   QObject::connect(results_dialog_, &TrackSelectionDialog::finished, tag_fetcher_, &TagFetcher::Cancel);
 #endif
+  QObject::connect(lyrics_fetcher_, &LyricsFetcher::LyricsFetched, this, &EditTagDialog::UpdateLyrics);
 
   album_cover_choice_controller_->Init(app_);
 
@@ -193,6 +197,7 @@ EditTagDialog::EditTagDialog(Application *app, QWidget *parent)
 #ifdef HAVE_MUSICBRAINZ
   QObject::connect(ui_->fetch_tag, &QPushButton::clicked, this, &EditTagDialog::FetchTag);
 #endif
+  QObject::connect(ui_->fetch_lyrics, &QPushButton::clicked, this, &EditTagDialog::FetchLyrics);
 
   // Set up the album cover menu
   cover_menu_ = new QMenu(this);
@@ -606,6 +611,8 @@ void EditTagDialog::SelectionChanged() {
   // Set the editable fields
   UpdateUI(indexes);
 
+  lyrics_id_ = -1;
+
   // If we're editing multiple songs then we have to disable certain tabs
   const bool multiple = indexes.count() > 1;
   ui_->tab_widget->setTabEnabled(ui_->tab_widget->indexOf(ui_->tab_summary), !multiple);
@@ -1411,6 +1418,31 @@ void EditTagDialog::FetchTagSongChosen(const Song &original_song, const Song &ne
 
 }
 
+void EditTagDialog::FetchLyrics() {
+
+  if (ui_->song_list->selectionModel()->selectedIndexes().isEmpty()) return;
+  const Song &song = data_[ui_->song_list->selectionModel()->selectedIndexes().first().row()].current_;
+  lyrics_fetcher_->Clear();
+  ui_->lyrics->setPlainText(tr("loading..."));
+  lyrics_id_ = static_cast<qint64>(lyrics_fetcher_->Search(song.effective_albumartist(), song.artist(), song.album(), song.title()));
+
+}
+
+void EditTagDialog::UpdateLyrics(const quint64 id, const QString &provider, const QString &lyrics) {
+
+  Q_UNUSED(provider);
+
+  if (static_cast<qint64>(id) != lyrics_id_) return;
+  lyrics_id_ = -1;
+  if (lyrics.isEmpty()) {
+    ui_->lyrics->setPlainText(tr("Not found."));
+  }
+  else {
+    ui_->lyrics->setPlainText(lyrics);
+  }
+
+}
+
 void EditTagDialog::SongSaveTagsComplete(TagReaderReply *reply, const QString &filename, Song song, const UpdateCoverAction cover_action) {
 
   --save_tag_pending_;

src/dialogs/edittagdialog.h

@@ -57,6 +57,7 @@ class Ui_EditTagDialog;
 #ifdef HAVE_MUSICBRAINZ
 class TrackSelectionDialog;
 class TagFetcher;
+class LyricsFetcher;
 #endif
 
 class EditTagDialog : public QDialog {
@@ -120,6 +121,8 @@ class EditTagDialog : public QDialog {
   void SongRated(const float rating);
   void FetchTag();
   void FetchTagSongChosen(const Song &original_song, const Song &new_metadata);
+  void FetchLyrics();
+  void UpdateLyrics(const quint64 id, const QString &provider, const QString &lyrics);
 
   void AlbumCoverLoaded(const quint64 id, const AlbumCoverLoaderResult &cover_result);
 
@@ -185,6 +188,7 @@ class EditTagDialog : public QDialog {
   TagFetcher *tag_fetcher_;
   TrackSelectionDialog *results_dialog_;
 #endif
+  LyricsFetcher *lyrics_fetcher_;
 
   const QImage image_no_cover_thumbnail_;
 
@@ -210,6 +214,8 @@ class EditTagDialog : public QDialog {
   QMap<int, Song> collection_songs_;
 
   AlbumCoverLoaderOptions::Types cover_types_;
+
+  qint64 lyrics_id_;
 };
 
 #endif  // EDITTAGDIALOG_H

src/dialogs/edittagdialog.ui

@@ -1131,6 +1131,13 @@
               </property>
              </widget>
             </item>
+            <item row="21" column="1">
+              <widget class="QPushButton" name="fetch_lyrics">
+                <property name="text">
+                  <string>Complete lyrics automatically</string>
+                </property>
+              </widget>
+            </item>
            </layout>
           </widget>
          </widget>
@@ -1213,6 +1220,7 @@
   <tabstop>fetch_tag</tabstop>
   <tabstop>comment</tabstop>
   <tabstop>lyrics</tabstop>
+  <tabstop>fetch_lyrics</tabstop>
  </tabstops>
  <resources>
   <include location="../../data/data.qrc"/>

src/lyrics/lyricsfetchersearch.cpp

@@ -134,6 +134,9 @@ void LyricsFetcherSearch::AllProvidersFinished() {
     qLog(Debug) << "Using lyrics from" << results_.last().provider << "for" << request_.artist << request_.title << "with score" << results_.last().score;
     emit LyricsFetched(id_, results_.last().provider, results_.last().lyrics);
   }
+  else {
+    emit LyricsFetched(id_, QString(), QString());
+  }
 
   emit SearchFinished(id_, results_);