82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
#include "directoryfileswatcher.h"
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#include <QDir>
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#include <QFileSystemWatcher>
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DirectoryFilesWatcher::DirectoryFilesWatcher(
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const QString &path, const QString &pattern, QObject *parent)
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: QObject{parent}, m_path{path}, m_pattern{pattern},
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m_fsWatcher{new QFileSystemWatcher(this)}
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{
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auto files = readDirectory();
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m_files.reserve(files.size());
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m_files.insert(std::move_iterator(files.begin()),
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std::move_iterator(files.end()));
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m_fsWatcher->addPath(path);
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connect(m_fsWatcher, &QFileSystemWatcher::directoryChanged,
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this, &DirectoryFilesWatcher::onDirectoryChanged);
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}
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QStringList DirectoryFilesWatcher::files() const
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{
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QStringList list;
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list.reserve(m_files.size());
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for (auto& [file, _] : m_files)
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list << file;
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return list;
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}
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std::vector<std::pair<QString, QDateTime>> DirectoryFilesWatcher::readDirectory() const
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{
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QDir dir(m_path);
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dir.setFilter(QDir::Files);
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dir.setNameFilters({m_pattern});
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const QFileInfoList filesInfo = dir.entryInfoList();
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std::vector<std::pair<QString, QDateTime>> files;
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files.reserve(filesInfo.size());
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std::transform(filesInfo.begin(), filesInfo.end(),
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std::back_inserter(files),
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[] (auto &info) {
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return std::make_pair(info.filePath(), info.lastModified());
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});
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return files;
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}
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void DirectoryFilesWatcher::onDirectoryChanged() {
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auto files = readDirectory();
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QStringList added;
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QStringList removed;
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QStringList changed;
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for (auto& [file, date] : files) {
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auto it = m_files.find(file);
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if (it == m_files.end()) {
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added.push_back(file);
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} else {
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if (date != it->second)
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changed.push_back(file);
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m_files.erase(it);
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}
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}
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for (auto& [file, date] : m_files)
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removed.push_back(file);
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m_files.clear();
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m_files.reserve(files.size());
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m_files.insert(std::move_iterator(files.begin()),
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std::move_iterator(files.end()));
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emit filesChanged(added, removed, changed);
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}
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