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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef DIR_EXIST_HEADER_08173281673432158067342132467183267
#define DIR_EXIST_HEADER_08173281673432158067342132467183267
#include <zen/thread.h>
#include <zen/file_handling.h>
#include <zen/file_error.h>
#include "process_callback.h"
#include "resolve_path.h"
namespace zen
{
namespace
{
//directory existence checking may hang for non-existent network drives => run asynchronously and update UI!
//- check existence of all directories in parallel! (avoid adding up search times if multiple network drives are not reachable)
//- add reasonable time-out time!
//- avoid checking duplicate entries by design: set<Zstring, LessFilename>
std::set<Zstring, LessFilename> getExistingDirsUpdating(const std::set<Zstring, LessFilename>& dirnames,
std::set<Zstring, LessFilename>& missing,
bool allowUserInteraction,
ProcessCallback& procCallback)
{
using namespace zen;
missing.clear();
std::list<std::pair<Zstring, boost::unique_future<bool>>> futureInfo;
for (const Zstring& dirname : dirnames)
if (!dirname.empty())
futureInfo.push_back(std::make_pair(dirname, async2<bool>([=]() -> bool
{
#ifdef ZEN_WIN
//1. login to network share, if necessary
loginNetworkShare(dirname, allowUserInteraction);
#endif
//2. check dir existence
return dirExists(dirname);
})));
std::set<Zstring, LessFilename> output;
//don't wait (almost) endlessly like win32 would on not existing network shares:
const boost::system_time endTime = boost::get_system_time() + boost::posix_time::seconds(20); //consider CD-rom insert or hard disk spin up time from sleep
for (auto& fi : futureInfo)
{
procCallback.reportStatus(replaceCpy(_("Searching for folder %x..."), L"%x", fmtFileName(fi.first), false)); //may throw!
while (boost::get_system_time() < endTime &&
!fi.second.timed_wait(boost::posix_time::milliseconds(UI_UPDATE_INTERVAL / 2)))
procCallback.requestUiRefresh(); //may throw!
if (fi.second.is_ready() && fi.second.get())
output.insert(fi.first);
else
missing.insert(fi.first);
}
return output;
}
}
inline //also silences Clang "unused function" for compilation units depending from getExistingDirsUpdating() only
bool dirExistsUpdating(const Zstring& dirname, bool allowUserInteraction, ProcessCallback& procCallback)
{
if (dirname.empty()) return false;
std::set<Zstring, LessFilename> missing;
std::set<Zstring, LessFilename> dirsEx = getExistingDirsUpdating({ dirname }, missing, allowUserInteraction, procCallback);
assert(dirsEx.empty() != missing.empty());
return dirsEx.find(dirname) != dirsEx.end();
}
}
#endif //DIR_EXIST_HEADER_08173281673432158067342132467183267
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