Added FileManager DLL and cleanup code

<SRS> SRS02 : Employee Management </SRS>

<Changes>
 - Created FileIO for reading and writing files
 - Created FileManager to use FileIO
 - Set up Trenser.FileManager as a DLL
 - Linked DLL with Trenser.Zenvy project
 - Fixed duplicate function issue by marking deactivateEmployee as inline
 - Cleaned up unused methods in controller and service
</Changes>

<Review>
Smitha Mohan
</Review>

Trenser.FileManager/Trenser.FileManager/FileIO.cpp

@@ -0,0 +1,28 @@
+#include "pch.h"
+#include "FileIO.h"
+
+std::vector<std::string> FileIO::readAllLines(const std::string& path)
+{
+    std::ifstream file(path);
+    if (!file.is_open())
+        throw std::runtime_error("Failed to open file " + path);
+
+    std::vector<std::string> lines;
+    std::string line;
+
+    while (std::getline(file, line))
+        lines.push_back(line);
+
+    return lines;
+}
+
+void FileIO::writeAllLines(const std::string& path,
+    const std::vector<std::string>& lines)
+{
+    std::ofstream file(path, std::ios::trunc);
+    if (!file.is_open())
+        throw std::runtime_error("Failed to open file " + path);
+
+    for (const auto& line : lines)
+        file << line << '\n';
+}

Trenser.FileManager/Trenser.FileManager/FileIO.h

@@ -0,0 +1,18 @@
+#pragma once
+#include<memory>
+#include<vector>
+#include<fstream>
+#include<string>
+#include<stdexcept>
+
+#ifdef TRENSERFILEMANAGER_EXPORTS
+#define TRENSERFILEMANAGER_API __declspec(dllexport)
+#else
+#define TRENSERFILEMANAGER_API __declspec(dllimport)
+#endif
+
+class TRENSERFILEMANAGER_API FileIO {
+public:
+    static std::vector<std::string> readAllLines(const std::string& path);
+    static void writeAllLines(const std::string& path, const std::vector<std::string>& lines);
+};

Trenser.FileManager/Trenser.FileManager/FileManager.h

@@ -0,0 +1,41 @@
+#pragma once
+#include "FileIO.h"
+
+template <typename T> using objects = std::map<int, std::shared_ptr<T>>;
+
+template <typename T>
+class FileManager
+{
+private:
+	std::string m_filePath;
+public:
+	FileManager() : m_filePath("") {}
+	FileManager(const std::string& filePath) : m_filePath(filePath) {}
+	objects<T> load();
+	void save(const objects<T>&);
+};
+
+template <typename T>
+objects<T> FileManager<T>::load()
+{
+	objects<T> records;
+	auto lines = FileIO::readAllLines(m_filePath);
+	for (const auto& record : lines)
+	{
+		auto object = T::deserialize(record);
+		records[object->getId()] = object;
+	}
+	return records;
+}
+
+template <typename T>
+void FileManager<T>::save(const objects<T>& records)
+{
+	std::vector<std::string> lines;
+
+	for (const auto& recordPair : records)
+	{
+		lines.push_back(recordPair.second->serialize());
+	}
+	FileIO::writeAllLines(m_filePath, lines);
+}

Trenser.FileManager/Trenser.FileManager/Trenser.FileManager.vcxproj

@@ -135,11 +135,14 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClInclude Include="FileIO.h" />
+    <ClInclude Include="FileManager.h" />
     <ClInclude Include="framework.h" />
     <ClInclude Include="pch.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="dllmain.cpp" />
+    <ClCompile Include="FileIO.cpp" />
     <ClCompile Include="pch.cpp">
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>

Trenser.FileManager/Trenser.FileManager/Trenser.FileManager.vcxproj.filters

@@ -21,6 +21,12 @@
     <ClInclude Include="pch.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="FileManager.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="FileIO.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="dllmain.cpp">
@@ -29,5 +35,8 @@
     <ClCompile Include="pch.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="FileIO.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>

Trenser.FileManager/Trenser.FileManager/pch.h

@@ -9,5 +9,10 @@
 
 // add headers that you want to pre-compile here
 #include "framework.h"
+#include<memory>
+#include<vector>
+#include<fstream>
+#include<string>
+#include<stdexcept>
 
 #endif //PCH_H