mirror of
https://github.com/worldforge/cyphesis
synced 2026-08-13 12:26:04 -04:00
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/*
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Copyright (C) 2018 Erik Ogenvik
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "FileSystemObserver.h"
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#include "log.h"
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#include <boost/algorithm/string.hpp>
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#include <boost/exception/exception.hpp>
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FileSystemObserver::FileSystemObserver(boost::asio::io_service& ioService) {
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try {
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mDirectoryMonitor.reset(new boost::asio::dir_monitor(ioService));
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observe();
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} catch (const boost::exception& e) {
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log(WARNING, "Could not initialize file system observer; probably due to running out of file descriptors.");
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}
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}
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FileSystemObserver::~FileSystemObserver() {
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assert(mCallBacks.empty());
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}
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void FileSystemObserver::observe() {
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if (mDirectoryMonitor) {
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mDirectoryMonitor->async_monitor([this](const boost::system::error_code& ec, const boost::asio::dir_monitor_event& ev) {
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if (!ec && ev.type != boost::asio::dir_monitor_event::null) {
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for (const auto& I : mCallBacks) {
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if (boost::starts_with(ev.path.string(), I.first.string())) {
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std::string relative = ev.path.string().substr(I.first.string().length() + 1);
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FileSystemEvent event{
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ev,
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relative
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};
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I.second(event);
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break;
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}
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}
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this->observe();
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}
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});
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}
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}
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void FileSystemObserver::add_directory(const boost::filesystem::path& dirname, std::function<void(const FileSystemObserver::FileSystemEvent&)> callback) {
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if (mDirectoryMonitor) {
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mDirectoryMonitor->add_directory(dirname.string());
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mCallBacks.insert(std::make_pair(dirname, callback));
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}
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}
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void FileSystemObserver::remove_directory(const boost::filesystem::path& dirname) {
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if (mDirectoryMonitor) {
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mCallBacks.erase(dirname);
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try {
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mDirectoryMonitor->remove_directory(dirname.string());
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} catch (...) {
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//Just swallow exceptions when removing watches; this is often because the directory has been removed. Doesn't change anything.
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}
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}
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}
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