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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) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
#include "watcher.h"
#include <zen/file_handling.h>
#include <zen/stl_tools.h>
#include <set>
#include <ctime>
#include <wx/timer.h>
#include "../lib/resolve_path.h"
#include <zen/dir_watcher.h>
#include <wx+/string_conv.h>
#include <zen/thread.h>
//#include "../library/db_file.h" //SYNC_DB_FILE_ENDING -> complete file too much of a dependency; file ending too little to decouple into single header
//#include "../library/lock_holder.h" //LOCK_FILE_ENDING
#include <wx/msgdlg.h>
using namespace zen;
bool rts::updateUiIsAllowed()
{
const std::clock_t CLOCK_UPDATE_INTERVAL = UI_UPDATE_INTERVAL * CLOCKS_PER_SEC / 1000;
static std::clock_t lastExec = 0;
const std::clock_t now = std::clock(); //this is quite fast: 2 * 10^-5
if (now - lastExec >= CLOCK_UPDATE_INTERVAL) //perform ui updates not more often than necessary
{
lastExec = now;
return true;
}
return false;
}
namespace
{
const int CHECK_DIR_INTERVAL = 1000; //1 second interval
}
rts::WaitResult rts::waitForChanges(const std::vector<Zstring>& dirNamesNonFmt, WaitCallback* statusHandler) //throw FileError
{
std::set<Zstring, LessFilename> dirNamesFmt;
std::for_each(dirNamesNonFmt.begin(), dirNamesNonFmt.end(),
[&](const Zstring& dirnameNonFmt)
{
const Zstring& dirnameFmt = zen::getFormattedDirectoryName(dirnameNonFmt);
if (dirnameFmt.empty())
throw zen::FileError(_("A directory input field is empty."));
dirNamesFmt.insert(dirnameFmt);
});
if (dirNamesFmt.empty()) //pathological case, but check is needed nevertheless
throw zen::FileError(_("A directory input field is empty."));
//detect when volumes are removed/are not available anymore
std::vector<std::pair<Zstring, std::shared_ptr<DirWatcher>>> watches;
for (auto iter = dirNamesFmt.begin(); iter != dirNamesFmt.end(); ++iter)
{
const Zstring& dirnameFmt = *iter;
try
{
watches.push_back(std::make_pair(dirnameFmt, std::make_shared<DirWatcher>(dirnameFmt))); //throw FileError, ErrorNotExisting
}
catch (ErrorNotExisting&) //nice atomic behavior: *no* second directory existence check!!!
{
return CHANGE_DIR_MISSING;
}
catch (FileError&) //play safe: remedy potential FileErrors that should have been ErrorNotExisting (e.g. Linux: errors during directory traversing)
{
if (!dirExists(dirnameFmt)) //not an atomic behavior!!!
return CHANGE_DIR_MISSING;
throw;
}
}
wxLongLong lastCheck;
while (true)
{
const bool checkDirExistNow = [&lastCheck]() -> bool //checking once per sec should suffice
{
const wxLongLong current = wxGetLocalTimeMillis();
if (current - lastCheck >= CHECK_DIR_INTERVAL)
{
lastCheck = current;
return true;
}
return false;
}();
for (auto iter = watches.begin(); iter != watches.end(); ++iter)
{
const Zstring& dirname = iter->first;
DirWatcher& watcher = *(iter->second);
//IMPORTANT CHECK: dirwatcher has problems detecting removal of top watched directories!
if (checkDirExistNow)
if (!dirExists(dirname)) //catch errors related to directory removal, e.g. ERROR_NETNAME_DELETED
return CHANGE_DIR_MISSING;
try
{
std::vector<Zstring> changedFiles = watcher.getChanges([&] { statusHandler->requestUiRefresh(); }); //throw FileError, ErrorNotExisting
//remove to be ignored changes
vector_remove_if(changedFiles, [](const Zstring& name)
{
return endsWith(name, Zstr(".ffs_lock")) || //sync.ffs_lock, sync.Del.ffs_lock
endsWith(name, Zstr(".ffs_db")); //sync.ffs_db, .sync.tmp.ffs_db
//no need to ignore temporal recycle bin directory: this must be caused by a file deletion anyway
});
if (!changedFiles.empty())
{
/*
std::for_each(changedFiles.begin(), changedFiles.end(),
[](const Zstring& fn) { wxMessageBox(toWx(fn));});
*/
return WaitResult(CHANGE_DETECTED, changedFiles[0]); //directory change detected
}
}
catch (ErrorNotExisting&) //nice atomic behavior: *no* second directory existence check!!!
{
return CHANGE_DIR_MISSING;
}
catch (FileError&) //play safe: remedy potential FileErrors that should have been ErrorNotExisting (e.g. Linux: errors during directory traversing)
{
if (!dirExists(dirname)) //not an atomic behavior!!!
return CHANGE_DIR_MISSING;
throw;
}
}
wxMilliSleep(rts::UI_UPDATE_INTERVAL);
statusHandler->requestUiRefresh();
}
}
//support for monitoring newly connected directories volumes (e.g.: USB-sticks)
void rts::waitForMissingDirs(const std::vector<Zstring>& dirNamesNonFmt, WaitCallback* statusHandler) //throw FileError
{
wxLongLong lastCheck;
while (true)
{
const wxLongLong current = wxGetLocalTimeMillis();
if (current - lastCheck >= CHECK_DIR_INTERVAL)
{
lastCheck = current;
auto ftDirMissing = async([=]() -> bool
{
return std::find_if(dirNamesNonFmt.begin(), dirNamesNonFmt.end(),
[](const Zstring& dirnameNonFmt) -> bool
{
//support specifying volume by name => call getFormattedDirectoryName() repeatedly
const Zstring dirnameFmt = zen::getFormattedDirectoryName(dirnameNonFmt);
if (dirnameFmt.empty())
throw zen::FileError(_("A directory input field is empty."));
#ifdef FFS_WIN
//1. login to network share, if necessary
loginNetworkShare(dirnameFmt, false); //login networks shares, no PW prompt -> is this really RTS's task?
#endif
//2. check dir existence
return !zen::dirExists(dirnameFmt);
}) != dirNamesNonFmt.end();
});
while (!ftDirMissing.timed_wait(boost::posix_time::milliseconds(rts::UI_UPDATE_INTERVAL)))
statusHandler->requestUiRefresh(); //may throw!
try
{
if (!ftDirMissing.get()) //throw X
return;
}
catch (...) //boost::future seems to map async exceptions to "some" boost exception type -> migrate this for C++11
{
throw zen::FileError(_("A directory input field is empty."));
}
}
wxMilliSleep(rts::UI_UPDATE_INTERVAL);
statusHandler->requestUiRefresh();
}
}
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