Add support for saving playcounts and ratings to tags

src/settings/collectionsettingspage.cpp

@@ -40,10 +40,12 @@
 #include <QRadioButton>
 #include <QSpinBox>
 #include <QSettings>
+#include <QMessageBox>
 
 #include "core/application.h"
 #include "core/iconloader.h"
 #include "core/utilities.h"
+#include "collection/collection.h"
 #include "collection/collectionmodel.h"
 #include "collection/collectiondirectorymodel.h"
 #include "collectionsettingspage.h"
@@ -94,6 +96,8 @@ CollectionSettingsPage::CollectionSettingsPage(SettingsDialog *dialog, QWidget *
   QObject::connect(ui_->combobox_cache_size, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &CollectionSettingsPage::CacheSizeUnitChanged);
   QObject::connect(ui_->combobox_disk_cache_size, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &CollectionSettingsPage::DiskCacheSizeUnitChanged);
 
+  QObject::connect(ui_->button_save_stats, &QPushButton::clicked, this, &CollectionSettingsPage::WriteAllSongsStatisticsToFiles);
+
 #ifndef HAVE_SONGFINGERPRINTING
   ui_->song_tracking->hide();
 #endif
@@ -110,7 +114,7 @@ void CollectionSettingsPage::Add() {
   QString path(s.value("last_path", QStandardPaths::writableLocation(QStandardPaths::MusicLocation)).toString());
   path = QFileDialog::getExistingDirectory(this, tr("Add directory..."), path);
 
-  if (!path.isNull()) {
+  if (!path.isEmpty()) {
     dialog()->collection_directory_model()->AddDirectory(path);
   }
 
@@ -206,6 +210,9 @@ void CollectionSettingsPage::Load() {
   ui_->combobox_disk_cache_size->setCurrentIndex(s.value(kSettingsDiskCacheSizeUnit, static_cast<int>(CacheSizeUnit_MB)).toInt());
   if (ui_->combobox_disk_cache_size->currentIndex() == -1) ui_->combobox_cache_size->setCurrentIndex(static_cast<int>(CacheSizeUnit_MB));
 
+  ui_->checkbox_save_playcounts->setChecked(s.value("save_playcounts", false).toBool());
+  ui_->checkbox_save_ratings->setChecked(s.value("save_ratings", false).toBool());
+
 #if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
   ui_->checkbox_delete_files->setChecked(s.value("delete_files", false).toBool());
 #else
@@ -270,6 +277,9 @@ void CollectionSettingsPage::Save() {
   s.setValue(kSettingsDiskCacheSize, ui_->spinbox_disk_cache_size->value());
   s.setValue(kSettingsDiskCacheSizeUnit, ui_->combobox_disk_cache_size->currentIndex());
 
+  s.setValue("save_playcounts", ui_->checkbox_save_playcounts->isChecked());
+  s.setValue("save_ratings", ui_->checkbox_save_ratings->isChecked());
+
   s.setValue("delete_files", ui_->checkbox_delete_files->isChecked());
 
   s.endGroup();
@@ -334,3 +344,14 @@ void CollectionSettingsPage::DiskCacheSizeUnitChanged(int index) {
   }
 
 }
+
+void CollectionSettingsPage::WriteAllSongsStatisticsToFiles() {
+
+  QMessageBox confirmation_dialog(QMessageBox::Question, tr("Write all playcounts and ratings to files"), tr("Are you sure you want to write song playcounts and ratings to file for all songs in your collection?"), QMessageBox::Yes | QMessageBox::Cancel);
+  if (confirmation_dialog.exec() != QMessageBox::Yes) {
+    return;
+  }
+
+  dialog()->app()->collection()->SyncPlaycountAndRatingToFilesAsync();
+
+}

src/settings/collectionsettingspage.h

@@ -82,6 +82,7 @@ class CollectionSettingsPage : public SettingsPage {
   void ClearPixmapDiskCache();
   void CacheSizeUnitChanged(int index);
   void DiskCacheSizeUnitChanged(int index);
+  void WriteAllSongsStatisticsToFiles();
 
  private:
   Ui_CollectionSettingsPage *ui_;

src/settings/collectionsettingspage.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>516</width>
-    <height>1167</height>
+    <height>1339</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -540,6 +540,53 @@ If there are no matches then it will use the largest image in the directory.</st
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox" name="groupbox_song_playcounts_and_ratings">
+     <property name="title">
+      <string>Song playcounts and ratings</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_3">
+      <item>
+       <widget class="QCheckBox" name="checkbox_save_playcounts">
+        <property name="text">
+         <string>Save playcounts to song tags when possible</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkbox_save_ratings">
+        <property name="text">
+         <string>Save ratings to song tags when possible</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="layout_statistics_button">
+        <item>
+         <widget class="QPushButton" name="button_save_stats">
+          <property name="text">
+           <string>Save playcounts and ratings to files now</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="spacer_save_stats">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <widget class="QCheckBox" name="checkbox_delete_files">
      <property name="text">