/**
* Creates a new instance of watcher thread. The watcher is not started but keeps the references
* to the directory to be watched, and the associated filter. The lastPass member is used to
* detect modification/creation of files between two passes.
*/
Watcher::Watcher(QString url, bool recursive, Filter *filterP) : QThread(), m_watchSem(1) {
m_url = url;
m_recursive = recursive;
m_filterP = filterP;
m_lastPass = QDateTime::currentDateTime();
// connect the activity signals/slots
connect(this, SIGNAL(displayActivity(QString)), filterP, SIGNAL(displayActivity(QString)));
connect(this, SIGNAL(displayProgress(int,int,int)), filterP, SIGNAL(displayProgress(int,int,int)));
// connect the scan results signals/slots
connect(this, SIGNAL(fileAdded(QString)), filterP, SLOT(fileAdded(QString)));
connect(this, SIGNAL(fileDeleted(QString)), filterP, SLOT(fileDeleted(QString)));
connect(this, SIGNAL(fileModified(QString)), filterP, SLOT(fileModified(QString)));
connect(this, SIGNAL(directoryAdded(QString)), filterP, SLOT(directoryAdded(QString)));
connect(this, SIGNAL(directoryDeleted(QString)), filterP, SLOT(directoryDeleted(QString)));
connect(this, SIGNAL(directoryModified(QString)), filterP, SLOT(directoryModified(QString)));
}
/*
* displayActivity
*/
void ActivityFrame::displayActivity( QListWidgetItem* item, QListWidgetItem* oldItem )
{
ActivityListWidgetItem* activityItem = dynamic_cast< ActivityListWidgetItem* >( item );
if( activityItem ) {
displayActivity( activityItem->activity() );
} else {
// no selection, empty the display
mUi->mCategoryLineEdit->setText( "" );
mUi->mStartDateTimeEdit->setDateTime( QDateTime( QDate( 1900, 1, 1 ), QTime( 0, 0, 0, 0 ) ) );
mUi->mTotalDistanceSpinBox->setValue( 0. );
mUi->mTotalTimeEdit->setTime( QTime( 0, 0, 0, 0 ) );
}
}
/**
* Returns in m_newFiles the newly found sub directories of root.
*/
void Watcher::getNewSubDirectories(QString root) {
if (root.isEmpty() || m_stop)
return;
// add new root to the list of directories
m_newFiles.addPath(root, true);
// signal new directory
directoryAdded(root);
// create a directory
QDirExt rootDir(root);
// get the directory entries
QStringList entries = rootDir.entryList();
if (entries.isEmpty())
return;
// give the user a hint about what's going on down here
displayActivity(tr("Exploring directory %1").arg(root));
// walk down recursively through the directories
for (QList<QString>::iterator i = entries.begin(); !m_stop && i != entries.end(); i++) {
QString entryPath = root;
entryPath.append(QDirExt::separator(root));
entryPath.append(*i);
QFileInfoExt entry(entryPath);
if (entry.isHidden())
continue;
if (entry.isDir()) {
// recursively go through children dirs if required
if (m_recursive && !m_files.findPath(entryPath)) {
getNewSubDirectories(entryPath);
#ifdef _VERBOSE_WATCHER
qDebug() << "Detected new directory " << entryPath;
#endif
}
}
}
}
/**
* Deletes the filter. Doesn't delete the children filters (classifier handles
* this).
*/
Filter::~Filter() {
#ifdef _VERBOSE_FILTER
qDebug() << "deleting filter " << m_virtualDirectoryPath;
#endif
displayActivity(tr("Deleting filter %1").arg(m_virtualDirectoryPath));
if (m_watcherP)
m_watcherP->acquireWatchSemaphore();
if (m_watcherP) {
if (isRunning())
stop();
delete m_watcherP;
}
// delete plugins
qDeleteAll(m_plugins);
m_plugins.clear();
// deletes the filter from the db
m_db.deleteFilter(m_filterId);
}
/**
* This is the watcher thread main stuff. It iterates on watching its 'known' directories and
* notifying the associated filter with the directories/files changes.
*/
void Watcher::run() {
QTime passStart;
int numEntries = 0;
const QList<PathSegment *> *pathsP = NULL;
// do nothing if no root url set
if (m_url.isEmpty())
return;
m_stop = false;
m_numWatchedFiles = 0;
// we'll start by scanning this one
m_files.addPath(m_url, true);
do {
passStart.restart();
#ifdef _VERBOSE_WATCHER
qDebug() << "(File)Watcher does a pass at " << passStart;
#endif
// now, don't let the filter play concurrently
if (!tryAcquireWatchSemaphore())
goto nextPass;
// check for new or modified files/directories
pathsP = m_files.getPaths(true);
numEntries = pathsP->count();
for (int i = 0; !m_stop && i < numEntries; i++) {
QString filepath = pathsP->at(i)->getPath();
// show progress
displayActivity(tr("Scanning directory %1").arg(filepath));
displayProgress(0, numEntries - 1, i);
watchDirectory(filepath);
}
// add the new files and directories to the watch lists
#ifdef _VERBOSE_PATH
m_files.dump("dumping watched files before merging");
m_newFiles.dump("dumping new files before merging");
#endif
m_files.merge(&m_newFiles);
m_newFiles.deleteAll();
#ifdef _VERBOSE_PATH
m_files.dump("dumping watched files after merging");
m_newFiles.dump("dumping new files after merging");
#endif
// now check if any of the watched files have disappeared
// check removed directories
for (QList<PathSegment *>::const_iterator i = m_files.getPaths(true)->begin(); i != m_files.getPaths(true)->end(); i++) {
QString filepath = (*i)->getPath();
QFileInfoExt entryInfo(filepath);
if (!entryInfo.exists()) {
// we DO NOT need to check the content and signal for everything...
// because the content will be checked later on...
#ifdef _VERBOSE_WATCHER
qDebug() << "Detected deleted directory " << filepath;
#endif
directoryDeleted(filepath);
m_removedFiles.addPath(filepath, true);
}
}
// check removed files
for (QList<PathSegment *>::const_iterator i = m_files.getPaths()->begin(); !m_stop && i != m_files.getPaths()->end(); i++) {
QString filepath = (*i)->getPath();
QFileInfoExt entryInfo(filepath);
if (!entryInfo.exists()) {
#ifdef _VERBOSE_WATCHER
qDebug() << "Detected deleted file " << filepath;
#endif
// fileDeleted(filepath);
fileDeleted(entryInfo.absoluteFilePath());
m_removedFiles.addPath(filepath);
--m_numWatchedFiles;
}
}
// and remove
// directories
for (QList<PathSegment *>::const_iterator i = m_removedFiles.getPaths(true)->begin(); i != m_removedFiles.getPaths(true)->end(); i++)
m_files.deletePath((*i)->getPath(), true);
// files
for (QList<PathSegment *>::const_iterator i = m_removedFiles.getPaths()->begin(); !m_stop && i != m_removedFiles.getPaths()->end(); i++)
m_files.deletePath((*i)->getPath());
m_removedFiles.deleteAll();
// keep last pass time
m_lastPass = QDateTime::currentDateTime();
// now, the filter can play
releaseWatchSemaphore();
nextPass:
#ifdef _VERBOSE_WATCHER
qDebug() << "(File)Watcher ends pass at " << m_lastPass << " (duration: " << passStart.elapsed() << " ms)";
#endif
QString duration;
duration.sprintf("%d", passStart.elapsed());
displayActivity(tr("Scanning pass completed in (%1) milliseconds. Now sleeping.").arg(duration));
displayProgress(1, 100, 100);
// a little break
if (!m_stop)
msleep(WATCH_PASS_INTERVAL);
} while (!m_stop);
#ifdef _VERBOSE_WATCHER
qDebug() << "(File)Watcher now EXITING!";
#endif
}