jsonfileloader.c

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class JsonFileLoader<Class T>
{
 protected static ref JsonSerializer m_Serializer = new JsonSerializer();
 
 static bool LoadFile(string filename, out T data, out string errorMessage)
 {
 if (FileExist(filename))
 {
 FileHandle handle = OpenFile(filename, FileMode.READ);
 if (handle == 0)
 {
 errorMessage = string.Format("Cannot open file \"%1\" for reading", filename);
 return false;
 }
 
 string fileContent;
 string lineContent;
 while (FGets(handle, lineContent) >= 0)
 {
 fileContent += lineContent;
 }
 
 CloseFile(handle);
 
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 string error;
 if (!m_Serializer.ReadFromString(data, fileContent, error))
 {
 errorMessage = string.Format("Cannot load data from \"%1\":\n%2", filename, error);
 return false;
 }
 
 return true;
 }
 else
 {
 errorMessage = string.Format("File \"%1\" does not exist, check the provided path", filename, error);
 return false;
 }
 }
 
 static bool SaveFile(string filename, T data, out string errorMessage)
 {
 string fileContent;
 
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 string makeDataError;
 if (!MakeData(data, fileContent, makeDataError, true))
 {
 errorMessage = string.Format("Cannot save data to file \"%1\", %2", filename, makeDataError);
 return false;
 } 
 
 FileHandle handle = OpenFile(filename, FileMode.WRITE);
 if (handle == 0)
 {
 errorMessage = string.Format("Cannot open file \"%1\" for writing", filename);
 return false;
 }
 
 FPrint(handle, fileContent);
 CloseFile(handle);
 
 return true;
 }
 
 static bool LoadData(string string_data, out T data, out string errorMessage)
 {
 string error;
 
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 if (!m_Serializer.ReadFromString(data, string_data, error))
 {
 errorMessage = string.Format("Cannot load provided JSON data (deserialization error) - check syntax: %1", error);
 return false;
 }
 
 return true;
 }
 
 static bool MakeData(T inputData, out string outputData, out string errorMessage, bool prettyPrint = true)
 {
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 if (!m_Serializer.WriteToString(inputData, prettyPrint, outputData))
 {
 errorMessage = "Cannot create JSON from provided data (serialization error)";
 return false;
 }
 
 return true;
 }
 
 
 
 static void JsonLoadFile(string filename, out T data)
 {
 
 if (FileExist(filename))
 {
 string file_content;
 string line_content;
 string error;
 
 FileHandle handle = OpenFile(filename, FileMode.READ);
 if (handle == 0)
 return;
 
 while (FGets(handle, line_content) >= 0)
 {
 file_content += line_content;
 }
 
 CloseFile(handle);
 
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 if (!m_Serializer.ReadFromString(data, file_content, error))
 ErrorEx(string.Format("Cannot load data from \"%1\":\n%2", filename, error));
 }
 }
 
 static void JsonSaveFile(string filename, T data)
 {
 string file_content;
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 m_Serializer.WriteToString(data, true, file_content);
 
 FileHandle handle = OpenFile(filename, FileMode.WRITE);
 if (handle == 0)
 return;
 
 FPrint(handle, file_content);
 CloseFile(handle);
 }
 
 static void JsonLoadData(string string_data, out T data)
 {
 string error;
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 if (!m_Serializer.ReadFromString(data, string_data, error))
 ErrorEx(string.Format("Cannot load data %1", error));
 }
 
 static string JsonMakeData(T data)
 {
 string string_data;
 if (!m_Serializer)
 m_Serializer = new JsonSerializer();
 
 m_Serializer.WriteToString(data, true, string_data);
 return string_data;
 }
 
 //#endif
}