112 lines
2.2 KiB
C++
112 lines
2.2 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "storage/cache/storage_cache_cleaner.h"
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#include <crl/crl.h>
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#include <QtCore/QDir>
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#include <QtCore/QFile>
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#include <unordered_map>
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#include <set>
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namespace Storage {
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namespace Cache {
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namespace details {
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class CleanerObject {
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public:
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CleanerObject(
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crl::weak_on_queue<CleanerObject> weak,
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const QString &base,
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base::binary_guard &&guard,
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FnMut<void(Error)> done);
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private:
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void start();
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void scheduleNext();
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void cleanNext();
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void done();
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crl::weak_on_queue<CleanerObject> _weak;
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QString _base, _errorPath;
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std::vector<QString> _queue;
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base::binary_guard _guard;
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FnMut<void(Error)> _done;
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};
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CleanerObject::CleanerObject(
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crl::weak_on_queue<CleanerObject> weak,
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const QString &base,
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base::binary_guard &&guard,
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FnMut<void(Error)> done)
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: _weak(std::move(weak))
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, _base(base)
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, _guard(std::move(guard))
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, _done(std::move(done)) {
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start();
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}
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void CleanerObject::start() {
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const auto entries = QDir(_base).entryList(
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QDir::Dirs | QDir::NoDotAndDotDot);
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for (const auto entry : entries) {
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_queue.push_back(entry);
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}
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if (const auto version = ReadVersionValue(_base)) {
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_queue.erase(
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ranges::remove(_queue, QString::number(*version)),
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end(_queue));
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scheduleNext();
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} else {
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_errorPath = VersionFilePath(_base);
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done();
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}
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}
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void CleanerObject::scheduleNext() {
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if (_queue.empty()) {
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done();
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return;
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}
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_weak.with([](CleanerObject &that) {
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if (that._guard.alive()) {
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that.cleanNext();
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}
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});
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}
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void CleanerObject::cleanNext() {
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const auto path = _base + _queue.back();
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_queue.pop_back();
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if (!QDir(path).removeRecursively()) {
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_errorPath = path;
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}
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scheduleNext();
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}
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void CleanerObject::done() {
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if (_done) {
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_done(_errorPath.isEmpty()
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? Error::NoError()
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: Error{ Error::Type::IO, _errorPath });
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}
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}
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Cleaner::Cleaner(
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const QString &base,
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base::binary_guard &&guard,
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FnMut<void(Error)> done)
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: _wrapped(base, std::move(guard), std::move(done)) {
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}
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Cleaner::~Cleaner() = default;
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} // namespace details
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} // namespace Cache
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} // namespace Storage
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