filesystemwatcher.h

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#ifndef FILESYSTEMWATCHER_H
#define FILESYSTEMWATCHER_H
 
#include <filesystem>
#include <mutex>
#include <thread>
#include <vector>
#include "filesystemchangedeventargs.h"
#include "watcherflags.h"
#include "events/event.h"
#ifdef _WIN32
#include <windows.h>
#elif defined(__APPLE__)
#include <CoreServices/CoreServices.h>
#endif
 
namespace Nickvision::Filesystem
{
    class FileSystemWatcher
    {
    public:
        FileSystemWatcher(const std::filesystem::path& path, bool includeSubdirectories, WatcherFlags watcherFlags = WatcherFlags::FileName | WatcherFlags::DirectoryName | WatcherFlags::Attributes | WatcherFlags::Size | WatcherFlags::LastWrite | WatcherFlags::LastAccess);
        ~FileSystemWatcher() noexcept;
        const std::filesystem::path& getPath() const noexcept;
        WatcherFlags getWatcherFlags() const noexcept;
        bool getIncludeSubdirectories() const noexcept;
        Events::Event<FileSystemChangedEventArgs>& changed() noexcept;
        bool isExtensionWatched(const std::filesystem::path& extension) const noexcept;
        bool addExtensionFilter(const std::filesystem::path& extension) noexcept;
        bool removeExtensionFilter(const std::filesystem::path& extension) noexcept;
        bool clearExtensionFilters() noexcept;
 
    private:
        void watch() noexcept;
        std::thread m_watchThread;
        mutable std::mutex m_mutex;
        std::filesystem::path m_path;
        bool m_includeSubdirectories;
        WatcherFlags m_watcherFlags;
        Events::Event<FileSystemChangedEventArgs> m_changed;
        bool m_watching;
        std::vector<std::filesystem::path> m_extensionFilters;
#ifdef _WIN32
        HANDLE m_terminateEvent;
#elif defined(__linux__)
        int m_notify;
#elif defined(__APPLE__)
        static void callback(ConstFSEventStreamRef stream, void* clientCallBackInfo, size_t numEvents, void* eventPaths, const FSEventStreamEventFlags eventFlags[], const FSEventStreamEventId eventIds[]) noexcept;
        FSEventStreamRef m_stream;
        CFRunLoopRef m_runLoop;
#endif
    };
}
 
#endif //FILESYSTEMWATCHER_H