ADD file via upload

file_monitor.cpp

@@ -0,0 +1,54 @@
+#include "file_monitor.h"
+#include <fstream>
+#include <thread>
+#include <sstream>
+
+FileMonitor::FileMonitor(const std::string& root_path, FileCallback callback)
+    : root_path_(root_path), callback_(std::move(callback)) {}
+
+FileMonitor::~FileMonitor() {
+    stop();
+}
+
+void FileMonitor::start() {
+    running_ = true;
+    monitor_thread_ = std::thread(&FileMonitor::monitor_thread, this);
+}
+
+void FileMonitor::stop() {
+    running_ = false;
+    if (monitor_thread_.joinable()) {
+        monitor_thread_.join();
+    }
+}
+
+void FileMonitor::monitor_thread() {
+    while (running_) {
+        scan_directory(root_path_);
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+    }
+}
+
+void FileMonitor::scan_directory(const fs::path& dir) {
+    for (const auto& entry : fs::recursive_directory_iterator(dir)) {
+        if (!entry.is_regular_file()) continue;
+        
+        const auto& path = entry.path();
+        auto last_write_time = fs::last_write_time(path);
+        
+        // 检查文件是否被修改
+        auto it = file_times_.find(path.string());
+        if (it == file_times_.end() || it->second != last_write_time) {
+            std::string content = read_file_content(path);
+            callback_(path.string(), content);
+            file_times_[path.string()] = last_write_time;
+        }
+    }
+}
+
+std::string FileMonitor::read_file_content(const fs::path& path) {
+    std::ifstream file(path, std::ios::binary);
+    std::stringstream buffer;
+    buffer << file.rdbuf();
+    return buffer.str();
+}