#include "DirectoryScanner.h"
#include <QDir>
#include <QFile>
#include <QCryptographicHash>
#include <QDebug>

DirectoryScanner::DirectoryScanner(const QString &rootDirectory, const QString &secretSalt) :
	m_hasher(QCryptographicHash::Sha1),
	m_secretSalt(secretSalt)
{
	QDir dir(rootDirectory);
	m_absoluteRoot = dir.canonicalPath();
	if (dir.exists())
		scanDirectory(dir);
}
void DirectoryScanner::scanDirectory(const QDir &directory)
{
	foreach (const QFileInfo &fileInfo, directory.entryInfoList(QDir::Dirs | QDir::Files | QDir::NoDotAndDotDot | QDir::Readable | QDir::Hidden)) {
		if (fileInfo.isDir())
			scanDirectory(QDir(fileInfo.absoluteFilePath()));
		else if (fileInfo.isFile()) {
			QString filePath = fileInfo.canonicalFilePath();
			if (filePath.startsWith(m_absoluteRoot))
				filePath = filePath.remove(0, m_absoluteRoot.length());
			filePath.append(m_secretSalt);
			filePath.prepend(m_secretSalt);
			m_hasher.addData(filePath.toUtf8());
			m_files.insert(m_hasher.result().toHex(), fileInfo);
			m_hasher.reset();
		}
	}
}
const QHash<const QString, QFileInfo> DirectoryScanner::fileList() const
{
	return m_files;
}