FileStoragePolicy.cpp

// SPDX-License-Identifier: LGPL-2.1-or-later
//
// SPDX-FileCopyrightText: 2007 Tobias Koenig <tokoe@kde.org>
//
 
 
// Own
#include "FileStoragePolicy.h"
 
// Qt
#include <QDir>
#include <QDirIterator>
#include <QFile>
#include <QFileInfo>
 
// Marble
#include "MarbleDebug.h"
#include "MarbleGlobal.h"
#include "MarbleDirs.h"
 
using namespace Marble;
 
FileStoragePolicy::FileStoragePolicy( const QString &dataDirectory, QObject *parent )
    : StoragePolicy( parent ),
      m_dataDirectory( dataDirectory )
{
    if ( m_dataDirectory.isEmpty() )
        m_dataDirectory = MarbleDirs::localPath() + QLatin1String("/cache/");
 
    if ( !QDir( m_dataDirectory ).exists() ) 
        QDir::root().mkpath( m_dataDirectory );
}
 
FileStoragePolicy::~FileStoragePolicy()
{
}
 
bool FileStoragePolicy::fileExists( const QString &fileName ) const
{
    const QString fullName = m_dataDirectory + QLatin1Char('/') + fileName;
    return QFile::exists( fullName );
}
 
bool FileStoragePolicy::updateFile( const QString &fileName, const QByteArray &data )
{
    QFileInfo const dirInfo( fileName );
    QString const fullName = dirInfo.isAbsolute() ? fileName : m_dataDirectory + QLatin1Char('/') + fileName;
 
    // Create directory if it doesn't exist yet...
    QFileInfo info( fullName );
 
    const QDir localFileDir = info.dir();
    const QString localFileDirPath = localFileDir.absolutePath();
 
    if ( !QDir( localFileDirPath ).exists() )
        QDir::root().mkpath( localFileDirPath );
 
    // ... and save the file content
    QFile file( fullName );
    if ( !file.open( QIODevice::WriteOnly ) ) {
        m_errorMsg = fullName + QLatin1String(": ") + file.errorString();
        qCritical() << "file.open" << m_errorMsg;
        return false;
    }
 
    quint64 oldSize = file.size();
 
    if ( !file.write( data ) ) {
        m_errorMsg = fullName + QLatin1String(": ") + file.errorString();
        qCritical() << "file.write" << m_errorMsg;
        emit sizeChanged( file.size() - oldSize );
        return false;
    }
 
    emit sizeChanged( file.size() - oldSize );
    file.close();
 
    return true;
}
 
void FileStoragePolicy::clearCache()
{
    mDebug();
    if ( m_dataDirectory.isEmpty()
    || !(m_dataDirectory.endsWith(QLatin1String( "data" ))   // on Windows
    ||   m_dataDirectory.endsWith(QLatin1String( "marble" )) // on all other OSes
    ))
    {
        mDebug() << "Data Directory:" << m_dataDirectory;
        mDebug() << "Error: Refusing to erase files under unknown conditions for safety reasons!";
        return;
    }
 
    const QString cachedMapsDirectory = m_dataDirectory + QLatin1String("/maps");
 
    QDirIterator it( cachedMapsDirectory, QDir::NoDotAndDotDot | QDir::Dirs );
    mDebug() << cachedMapsDirectory;
    while (it.hasNext()) {
        it.next();
        QString planetDirectory = it.filePath();
        QDirIterator itPlanet( planetDirectory, QDir::NoDotAndDotDot | QDir::Dirs );
        while (itPlanet.hasNext()) {
            itPlanet.next();
            QString themeDirectory = itPlanet.filePath();
            QDirIterator itTheme( themeDirectory, QDir::NoDotAndDotDot | QDir::Dirs );
            while (itTheme.hasNext()) {
                itTheme.next();
                QString tileDirectory = itTheme.filePath();
 
                if ( itTheme.fileName().toInt() <= maxBaseTileLevel ) {
                    continue;
                }
 
                QDirIterator itTile( tileDirectory, QDir::Files | QDir::NoSymLinks, QDirIterator::Subdirectories );
                while (itTile.hasNext()) {
                    itTile.next();
                    QString filePath = itTile.filePath();
                    QString lowerCase = filePath.toLower();
 
                    // We try to be very careful and just delete images
                    // FIXME, when vectortiling I suppose also vector tiles will have
                    // to be deleted
                    if ( lowerCase.endsWith( QLatin1String( ".jpg" ) ) 
                      || lowerCase.endsWith( QLatin1String( ".png" ) )
                      || lowerCase.endsWith( QLatin1String( ".gif" ) )
                      || lowerCase.endsWith( QLatin1String( ".svg" ) )
                      || lowerCase.endsWith( QLatin1String( ".o5m" ) )
                    )
                    {
                        // We cannot emit clear, because we don't make a full clear
                        QFile file( filePath );
                        emit sizeChanged( -file.size() );
                        file.remove();
                    }
                }
            }
        }
    }
}
 
QString FileStoragePolicy::lastErrorMessage() const
{
    return m_errorMsg;
}
 
#include "moc_FileStoragePolicy.cpp"