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#include "changewatcher.h"
#include <iostream>
#include <filesystem>
#include <sys/inotify.h>
#include <sys/eventfd.h>
#include <unistd.h>
#include <algorithm>
ChangeWatcher::ChangeWatcher()
{
}
ChangeWatcher::~ChangeWatcher()
{
setEnable(false);
}
void ChangeWatcher::watch(const std::string &newPath)
{
if(std::find(m_watches.begin(), m_watches.end(), newPath) == m_watches.end())
{
m_watches.push_back(newPath);
if(m_enabled)
{
_addWatch(newPath);
}
}
}
void ChangeWatcher::setEnable(bool newVal)
{
if(m_enabled == newVal)
return;
if(newVal)
{
// Start thread
m_fdnotify = inotify_init();
for(auto &newPath: m_watches)
{
_addWatch(newPath);
}
m_fdevent = eventfd(0, 0);
m_enabled = true;
m_thread = std::thread(_runningLoop, this);
}
else
{
// Stop thread
m_enabled = false;
uint64_t value = 1;
write(m_fdevent, &value, sizeof(value));
close(m_fdevent);
m_thread.join();
close(m_fdnotify);
}
}
bool ChangeWatcher::enabled() const
{
return m_enabled;
}
void ChangeWatcher::setFileWrited(const std::function<void (const std::string &)> &callback)
{
m_filewrited = callback;
}
void ChangeWatcher::setFileAdded(const std::function<void (const std::string &)> &callback)
{
m_fileadded = callback;
}
void ChangeWatcher::setFileRemoved(const std::function<void (const std::string &)> &callback)
{
m_fileremoved = callback;
}
void ChangeWatcher::_runningLoop(ChangeWatcher *m)
{
const size_t event_size = sizeof(struct inotify_event);
const size_t buffer_size = 1024 * (event_size + 16);
char buffer[buffer_size];
while (m->m_enabled) {
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(m->m_fdevent, &rfds);
FD_SET(m->m_fdnotify, &rfds);
int nfds = std::max(m->m_fdevent, m->m_fdnotify) + 1;
if (select(nfds, &rfds, nullptr, nullptr, nullptr) > 0) {
if (FD_ISSET(m->m_fdevent, &rfds)) {
break; // Signal d'arrêt reçu
}
if (FD_ISSET(m->m_fdnotify, &rfds)) {
int length = read(m->m_fdnotify, buffer, buffer_size);
if (length > 0) {
size_t i = 0;
while (i < length) {
auto* event = reinterpret_cast<struct inotify_event*>(&buffer[i]);
if((event->mask & IN_CLOSE_WRITE) && (m->m_filewrited != nullptr))
{
m->m_filewrited(m->m_wd[event->wd]);
}
if((event->mask & IN_CREATE) && (m->m_fileadded != nullptr))
{
m->m_fileadded(m->m_wd[event->wd]);
}
if((event->mask & IN_DELETE) && (m->m_fileremoved != nullptr))
{
m->m_fileremoved(m->m_wd[event->wd]);
}
i += event_size + event->len;
}
}
}
}
}
}
void ChangeWatcher::_addWatch(const std::string &newPath)
{
int wd = -1;
if(std::filesystem::is_directory(newPath))
{
wd = inotify_add_watch(m_fdnotify, newPath.c_str(), IN_CREATE | IN_DELETE);
}
else
{
wd = inotify_add_watch(m_fdnotify, newPath.c_str(), IN_CLOSE_WRITE);
}
if(wd > -1) m_wd[wd] = newPath;
}
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