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116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/*
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* Filesystem.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "CInputStream.h"
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#include "ISimpleResourceLoader.h"
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#include "ResourceID.h"
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class CFilesystemList;
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class JsonNode;
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/// Helper class that allows generation of a ISimpleResourceLoader entry out of Json config(s)
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class DLL_LINKAGE CFilesystemGenerator
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{
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typedef std::function<void(const std::string &, const JsonNode &)> TLoadFunctor;
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typedef std::map<std::string, TLoadFunctor> TLoadFunctorMap;
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CFilesystemList * filesystem;
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std::string prefix;
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template<EResType::Type archiveType>
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void loadArchive(const std::string & mountPoint, const JsonNode & config);
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void loadDirectory(const std::string & mountPoint, const JsonNode & config);
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void loadZipArchive(const std::string & mountPoint, const JsonNode & config);
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void loadJsonMap(const std::string & mountPoint, const JsonNode & config);
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TLoadFunctorMap genFunctorMap();
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public:
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/// prefix = prefix that will be given to file entries in all nodes of this filesystem
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CFilesystemGenerator(std::string prefix);
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/// loads configuration from json
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/// config - configuration to load, using format of "filesystem" entry in config/filesystem.json
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void loadConfig(const JsonNode & config);
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/// returns generated filesystem
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CFilesystemList * getFilesystem();
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};
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/**
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* This class has static methods for a global resource loader access.
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*
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* Class is not thread-safe.
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*/
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class DLL_LINKAGE CResourceHandler
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{
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/**
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* @brief createInitial - creates instance of initial loader
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* that contains data necessary to load main FS
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*/
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static ISimpleResourceLoader * createInitial();
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public:
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/**
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* Gets an instance of resource loader.
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*
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* Make sure that you've set an instance before using it. It'll throw an exception if no instance was set.
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*
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* @return Returns an instance of resource loader.
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*/
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static ISimpleResourceLoader * get();
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static ISimpleResourceLoader * get(std::string identifier);
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/**
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* Creates instance of initial resource loader.
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* Will not fill filesystem with data
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*
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*/
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static void initialize();
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/**
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* Will load all filesystem data from Json data at this path (normally - config/filesystem.json)
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* @param fsConfigURI - URI from which data will be loaded
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*/
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static void load(const std::string & fsConfigURI);
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/**
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* @brief addFilesystem adds filesystem into global resource loader
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* @param identifier name of this loader by which it can be retrieved later
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* @param loader resource loader to add
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*/
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static void addFilesystem(const std::string & parent, const std::string & identifier, ISimpleResourceLoader * loader);
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/**
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* @brief removeFilesystem removes previously added filesystem from global resouce holder
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* @param parent parent loader containing filesystem
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* @param identifier name of this loader
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* @return if filesystem was successfully removed
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*/
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static bool removeFilesystem(const std::string & parent, const std::string & identifier);
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/**
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* @brief createModFileSystem - creates filesystem out of config file
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* @param prefix - prefix for all paths in filesystem config
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* @param fsConfig - configuration to load
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* @return generated filesystem that contains all config entries
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*/
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static ISimpleResourceLoader * createFileSystem(const std::string &prefix, const JsonNode & fsConfig);
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~CResourceHandler() = default;
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private:
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/** Instance of resource loader */
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static std::map<std::string, ISimpleResourceLoader*> knownLoaders;
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static CResourceHandler globalResourceHandler;
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CResourceHandler() {};
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std::unique_ptr<ISimpleResourceLoader> rootLoader;
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};
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