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/*
* Copyright (C) 2015 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "storagemonitor.h"
#include "storagelocations.h"
StorageMonitor::StorageMonitor(QObject *parent) :
QObject(parent), m_low(false), m_criticallyLow(false), m_writeable(true)
{
m_timer.setInterval(POLL_INTERVAL);
m_timer.setSingleShot(false);
connect(&m_timer, SIGNAL(timeout()), SLOT(refresh()));
}
void StorageMonitor::refresh()
{
m_storage.refresh();
checkDiskSpace();
}
void StorageMonitor::checkDiskSpace() {
bool currentLow;
bool currentCriticallyLow;
if (m_storage.isValid() && m_storage.isReady()) {
qint64 freeSpace = m_storage.bytesAvailable();
currentLow = (freeSpace <= LOW_SPACE_THRESHOLD);
currentCriticallyLow = (freeSpace <= CRITICALLY_LOW_SPACE_THRESHOLD);
} else {
currentLow = false;
currentCriticallyLow = false;
}
if (currentLow != m_low) {
m_low = currentLow;
Q_EMIT diskSpaceLowChanged();
}
if (currentCriticallyLow != m_criticallyLow) {
m_criticallyLow = currentCriticallyLow;
Q_EMIT diskSpaceCriticallyLowChanged();
}
}
void StorageMonitor::checkWriteable()
{
bool writeable = true;
QString mediaRoot("/media/" + qgetenv("USER"));
if (m_storage.rootPath().startsWith(mediaRoot)) {
// check only for external media, assume internal media is always writeable
if (m_storage.isReadOnly()) {
writeable = false;
} else {
StorageLocations locations;
QDir storageRoot(locations.removableStoragePicturesLocation());
QFile testFile(storageRoot.absoluteFilePath(".write_test"));
bool opened = testFile.open(QIODevice::WriteOnly | QIODevice::Unbuffered);
if (!opened || testFile.write("x", 1) != 1) writeable = false;
testFile.close();
testFile.remove();
}
}
if (m_writeable != writeable) {
m_writeable = writeable;
Q_EMIT isWriteableChanged();
}
}
void StorageMonitor::setLocation(QString location)
{
if (location != m_location) {
m_timer.stop();
m_location = location;
m_storage.setPath(m_location);
checkDiskSpace();
checkWriteable();
if (m_storage.isValid()) {
m_timer.start();
}
Q_EMIT locationChanged();
}
}
QString StorageMonitor::location() const
{
return m_location;
}
bool StorageMonitor::diskSpaceLow() const
{
return m_low;
}
bool StorageMonitor::diskSpaceCriticallyLow() const
{
return m_criticallyLow;
}
bool StorageMonitor::isWriteable() const
{
return m_writeable;
}
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