Engine puzzle completed

src/Engine/Core/Util/FileWatcher.cpp

@@ -0,0 +1,134 @@
+#include "Core/Util/FileWatcher.h"
+
+FileWatcher::FileWatcher()
+{
+	m_Worker = new Worker;
+}
+
+FileWatcher::FileWatcher(std::string rootPath)
+{
+	m_RootPath = rootPath;
+	m_Worker = new Worker;
+}
+
+FileWatcher::~FileWatcher()
+{
+	m_Thread.interrupt();
+	if (m_Worker != nullptr)
+	{
+		delete m_Worker;
+	}
+}
+
+void FileWatcher::AddWatch(std::string path, FileEventCallback_t callback)
+{
+	m_Worker->AddWatch(path, callback);
+}
+
+void FileWatcher::Start()
+{
+	m_Thread.interrupt();
+	m_Thread = boost::thread(boost::ref(*m_Worker));
+	m_IsRunning = true;
+}
+
+void FileWatcher::Stop()
+{
+	m_Thread.interrupt();
+	m_IsRunning = false;
+}
+
+void FileWatcher::Check()
+{
+	m_Worker->Check();
+}
+
+
+void FileWatcher::Worker::operator()()
+{
+	while (true)
+	{
+		boost::this_thread::interruption_point();
+		Check();
+		boost::this_thread::sleep_for(boost::chrono::milliseconds(1000));
+	}
+}
+
+void FileWatcher::Worker::AddWatch(std::string path, FileEventCallback_t callback)
+{
+	m_Mutex.lock();
+	boost::filesystem::path bpath(path);
+	m_FileCallbacks[bpath] = callback;
+	if (boost::filesystem::exists(bpath))
+	{
+		m_FileInfo[bpath] = GetFileInfo(bpath);
+	}
+	m_Mutex.unlock();
+}
+
+void FileWatcher::Worker::Check()
+{
+	m_Mutex.lock();
+	for (auto &kv : m_FileCallbacks)
+	{
+		boost::filesystem::path path = kv.first;
+		FileEventCallback_t& callback = kv.second;
+		FileEventFlags flags = UpdateFileInfo(path);
+		if (flags != FileEventFlags::Nothing && callback != nullptr)
+		{
+			callback(path.string(), flags);
+		}
+	}
+	m_Mutex.unlock();
+}
+
+FileWatcher::Worker::FileInfo FileWatcher::Worker::GetFileInfo(boost::filesystem::path path)
+{
+	FileInfo fi;
+	fi.Size = boost::filesystem::file_size(path);
+	fi.Timestamp = boost::filesystem::last_write_time(path);
+	return fi;
+}
+
+FileWatcher::FileEventFlags FileWatcher::Worker::UpdateFileInfo(boost::filesystem::path path)
+{
+	FileEventFlags flags = FileEventFlags::Nothing;
+	if (boost::filesystem::exists(path))
+	{
+		FileInfo fi = GetFileInfo(path);
+		auto lastFileInfoIt = m_FileInfo.find(path);
+		if (lastFileInfoIt != m_FileInfo.end())
+		{
+			FileInfo lastFileInfo = lastFileInfoIt->second;
+
+			if (fi.Size != lastFileInfo.Size)
+			{
+				LOG_DEBUG("FileWatcher: \"%s\" size changed!", path.string().c_str());
+				flags = flags | FileEventFlags::SizeChanged;
+			}
+			if (fi.Timestamp != lastFileInfo.Timestamp)
+			{
+				LOG_DEBUG("FileWatcher: \"%s\" timestamp changed!", path.string().c_str());
+				flags = flags | FileEventFlags::TimestampChanged;
+
+			}
+		}
+		else
+		{
+			LOG_DEBUG("FileWatcher: \"%s\" was created!", path.string().c_str());
+			flags = flags | FileEventFlags::Created;
+		}
+		m_FileInfo[path] = GetFileInfo(path);
+	}
+	else
+	{
+		auto fileInfoIt = m_FileInfo.find(path);
+		if (fileInfoIt != m_FileInfo.end())
+		{
+			m_FileInfo.erase(fileInfoIt);
+			LOG_DEBUG("FileWatcher: \"%s\" was deleted!", path.string().c_str());
+			flags = flags | FileEventFlags::Deleted;
+		}
+	}
+	return flags;
+}