113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/******************************************************************************
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* \file SHAssetMetaHandler.cpp
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* \author Loh Xiao Qi
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* \brief Implementations for SHAssetMetaHandler.h
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*
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* \copyright Copyright (c) 2021 Digipen Institute of Technology. Reproduction
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* or disclosure of this file or its contents without the prior
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* written consent of Digipen Institute of Technology is prohibited
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******************************************************************************/
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#include "SHpch.h"
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#include "SHAssetMetaHandler.h"
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#include <fstream>
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#include <sstream>
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namespace SHADE
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{
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/****************************************************************************
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* \param reference to ifstream file to read line from
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* \param reference to string to store line into
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* \brief Helper function to retrieve field value from meta data file
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* for processing
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****************************************************************************/
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void GetFieldValue(std::ifstream& file, std::string& line) noexcept
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{
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line = "";
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std::getline(file, line);
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line = line.substr(line.find_last_of(':') + 2, line.length());
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}
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/****************************************************************************
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* \param String containing extension of resource file
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* \brief Get correct resource type from file extension of resource.
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****************************************************************************/
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AssetType SHAssetMetaHandler::GetTypeFromExtension(AssetExtension ext) noexcept
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{
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for (int i{0}; i < EXTENSIONS->size(); ++i)
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{
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if (ext == EXTENSIONS[i])
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{
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return static_cast<AssetType>(i);
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}
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}
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}
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/****************************************************************************
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* \param String containing extension of resource file
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* \brief Get correct resource type from file extension of resource.
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****************************************************************************/
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AssetExtension SHAssetMetaHandler::GetExtensionFromType(AssetType type) noexcept
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{
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return EXTENSIONS[static_cast<size_t>(type)];
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}
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/****************************************************************************
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* \param Create class containing meta data from meta file
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* \brief path to meta data file
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****************************************************************************/
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SHAssetMeta SHAssetMetaHandler::RetrieveMetaData(AssetPath const& path) noexcept
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{
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std::ifstream metaFile{ path.string(), std::ios_base::in };
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if (!metaFile.is_open())
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{
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// Error unable to open
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}
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std::string line;
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SHAssetMeta meta;
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// Get resource id
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GetFieldValue(metaFile, line);
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std::stringstream idStream{ line };
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AssetID id;
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idStream >> id;
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meta.id = id;
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// Get resource type
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GetFieldValue(metaFile, line);
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std::stringstream typeStream{ line };
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AssetTypeMeta type;
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typeStream >> type;
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meta.type = static_cast<AssetType>(type);
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metaFile.close();
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return meta;
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}
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/****************************************************************************
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* \param Asset meta data to be written into
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* \param Path to be written into
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* \brief Writes meta data into text file
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****************************************************************************/
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void SHAssetMetaHandler::WriteMetaData(SHAssetMeta const& meta, AssetPath const& path) noexcept
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{
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std::ofstream metaFile{ path, std::ios_base::out };
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if (!metaFile.is_open())
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{
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// Log error
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}
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metaFile << "ID: " << meta.id << "\n";
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metaFile << "Type: " << static_cast<int>(meta.type) << std::endl;
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metaFile.close();
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}
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}
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