Add support for deleting videos

.. but only deletes references and db entry
.. we do not delete from the filesystem -- need to add a dialog
   to ask the user to confirm deleting the file from disk.

src/Library.cpp

@@ -196,6 +196,17 @@ Library::importFiles(MainWindow *mainWindow, QStringList files)
     }
 }
 
+void
+Library::removeRef(MainWindow *mainWindow, QString ref)
+{
+    // remove a previous reference
+    int index = refs.indexOf(ref);
+    if (index >= 0) {
+        refs.removeAt(index);
+        LibraryParser::serialize(mainWindow->home);
+    }
+}
+
 //
 // SEARCHDIALOG -- user select paths and files and run a search
 //

src/Library.h

@@ -41,6 +41,7 @@ class Library : QObject
         static void initialise(QDir); // init
         static Library *findLibrary(QString);
         static void importFiles(MainWindow *mainWindow, QStringList files);
+        void removeRef(MainWindow *mainWindow, QString ref);
 };
 
 extern QList<Library *> libraries;        // keep track of all Library search paths for all users

src/TrainDB.cpp

@@ -350,6 +350,17 @@ bool TrainDB::importWorkout(QString pathname, ErgFile *ergFile)
 	return rc;
 }
 
+bool TrainDB::deleteVideo(QString pathname)
+{
+	QSqlQuery query(dbconn);
+    QDateTime timestamp = QDateTime::currentDateTime();
+
+    // zap the current row - if there is one
+    query.prepare("DELETE FROM videos WHERE filepath = ?;");
+    query.addBindValue(pathname);
+    return query.exec();
+}
+
 bool TrainDB::importVideo(QString pathname)
 {
 	QSqlQuery query(dbconn);

src/TrainDB.h

@@ -54,6 +54,7 @@ class TrainDB : public QObject
     bool deleteWorkout(QString pathname);
 
     bool importVideo(QString pathname);
+    bool deleteVideo(QString pathname);
 
     // drop and recreate tables
     void rebuildDB();

src/TrainTool.cpp

@@ -52,6 +52,7 @@
 
 #include <math.h> // isnan and isinf
 #include "TrainDB.h"
+#include "Library.h"
 
 TrainTool::TrainTool(MainWindow *parent, const QDir &home) : GcWindow(parent), home(home), main(parent)
 {
@@ -461,6 +462,15 @@ TrainTool::mediaPopup()
     connect(import, SIGNAL(triggered(void)), main, SLOT(importWorkout(void)));
     connect(scan, SIGNAL(triggered(void)), main, SLOT(manageLibrary(void)));
 
+    QModelIndex current = mediaTree->currentIndex();
+    QModelIndex target = vsortModel->mapToSource(current);
+    QString filename = videoModel->data(videoModel->index(target.row(), 0), Qt::DisplayRole).toString();
+    if (QFileInfo(filename).exists()) {
+        QAction *del = new QAction(tr("Delete selected video"), workoutTree);
+        menu.addAction(del);
+        connect(del, SIGNAL(triggered(void)), this, SLOT(deleteVideos(void)));
+    }
+
     // execute the menu
     menu.exec(trainSplitter->mapToGlobal(QPoint(mediaItem->pos().x()+mediaItem->width()-20,
                                            mediaItem->pos().y())));
@@ -654,6 +664,39 @@ TrainTool::listWorkoutFiles(const QDir &dir) const
     return dir.entryList(filters, QDir::Files, QDir::Name);
 }
 
+void
+TrainTool::deleteVideos()
+{
+    QModelIndex current = mediaTree->currentIndex();
+    QModelIndex target = vsortModel->mapToSource(current);
+    QString filename = videoModel->data(videoModel->index(target.row(), 0), Qt::DisplayRole).toString();
+
+    if (QFileInfo(filename).exists()) {
+        // are you sure?
+        QMessageBox msgBox;
+        msgBox.setText(tr("Are you sure you want to delete this video?"));
+        msgBox.setInformativeText(filename);
+        QPushButton *deleteButton = msgBox.addButton(tr("Delete"),QMessageBox::YesRole);
+        msgBox.setStandardButtons(QMessageBox::Cancel);
+        msgBox.setDefaultButton(QMessageBox::Cancel);
+        msgBox.setIcon(QMessageBox::Critical);
+        msgBox.exec();
+
+        if(msgBox.clickedButton() != deleteButton) return;
+
+        // delete from disk
+        //XXX QFile(filename).remove(); // lets not for now..
+
+        // remove any reference (from drag and drop)
+        Library *l = Library::findLibrary("Media Library");
+        if (l) l->removeRef(main, filename);
+
+        // delete from DB
+        trainDB->startLUW();
+        trainDB->deleteVideo(filename);
+        trainDB->endLUW();
+    }
+}
 void
 TrainTool::deleteWorkouts()
 {

src/TrainTool.h

@@ -135,6 +135,7 @@ class TrainTool : public GcWindow
     public slots:
         void configChanged();
         void deleteWorkouts(); // deletes selected workouts
+        void deleteVideos(); // deletes selected workouts
 
         void Start();       // when start button is pressed
         void Pause();       // when Paude is pressed