Added database maintenance code

Implemented a function in MappingTableModel to remove all actors/genres
with no references in the according mapping table. Available through the
"File" menu.

1 files changed, 29 insertions, 0 deletions

diff --git a/archivetreeview.cpp b/archivetreeview.cpp
index 1ae3cc8..1d66fbe 100644
--- a/archivetreeview.cpp
+++ b/archivetreeview.cpp
@@ -16,6 +16,7 @@
 #include <QSettings>
 #include <QHash>
 #include <QProcess>
+#include <QMessageBox>
 
 #include "archivetreeview.h"
 #include "smglobals.h"
@@ -99,6 +100,34 @@ void ArchiveTreeView::setFileViewMode(int mode){
 	constructWindowTitle();
 }
 
+void ArchiveTreeView::cleanDatabase(const QString &table){
+	MappingTableModel *model = 0;
+	if(table == "genres"){
+		model = mGenresModel;
+	}else if(table == "actors"){
+		model = mActorsModel;
+	}
+	Q_ASSERT(model);
+	QHash<QString, int> zeroUsers = model->zeroUsers();
+	if(zeroUsers.isEmpty()){
+		QMessageBox::information(this, tr("Message"), tr("Nothing to clean up!"));
+		return;
+	}
+	QString message = QString(tr("<p>Really delete these items from %1?<p>")).arg(table);
+	message.append("<ul>");
+	QStringList userNames = zeroUsers.keys();
+	qSort(userNames);
+	foreach(QString s, userNames){
+		message.append(QString("<li>%1</li>").arg(s));
+	}
+	message.append("</ul>");
+	int answer = QMessageBox::question(this, tr("Question"), message, QMessageBox::Yes | QMessageBox::No);
+	if(answer == QMessageBox::Yes){
+		QList<int> ids = zeroUsers.values();
+		model->deleteItems(ids);
+	}
+}
+
 void ArchiveTreeView::currentChanged(const QItemSelection &selected, const QItemSelection &deselected){
 	Q_UNUSED(selected);
 	Q_UNUSED(deselected);