feat: add file log sink

src/unlocker/log-sink-file.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <seallib/log.h>
+
+#include <fstream>
+#include <string>
+#include <mutex>
+#include <memory>
+
+#include "utils.h"
+
+using namespace seallib;
+
+class FileSink : public ILogSink
+{
+    public:
+        FileSink(const std::string& filename)
+        {
+            _file.open(utils::getExePath() + filename, std::ios::out | std::ios::app);
+        }
+
+        ~FileSink()
+        {
+            if (_file.is_open())
+                _file.close();
+        }
+
+        virtual void receiveLog(LogType type, std::string_view loggerName, std::string_view msg) override
+        {
+            std::lock_guard<std::mutex> lock(_mutex);
+            if (_file.is_open())
+            {
+                _file << "[" << loggerName << "] ["
+                      << seallib::getLogTypeName(type) << "] "
+                      << msg << std::endl;
+            }
+        }
+
+        static std::shared_ptr<FileSink> getSharedInstance()
+        {
+            static std::shared_ptr<FileSink> instance = std::make_shared<FileSink>("hex-unlocked.log");
+            return instance;
+        }
+
+    private:
+        std::ofstream _file;
+        std::mutex _mutex;
+};