status-desktop/storybook/directoryfileswatcher.cpp

82 lines
2.1 KiB
C++
Raw Permalink Normal View History

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