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/*
* AdapterLoaders.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#include "ISimpleResourceLoader.h"
#include "ResourceID.h"
class CInputStream;
class JsonNode;
/**
* Class that implements file mapping (aka *nix symbolic links)
* Uses json file as input, content is map:
* "fileA.txt" : "fileB.txt"
* Note that extension is necessary, but used only to determine type
*
* fileA - file which will be replaced
* fileB - file which will be used as replacement
*/
class DLL_LINKAGE CMappedFileLoader : public ISimpleResourceLoader
{
public:
/**
* Ctor.
*
* @param config Specifies filesystem configuration
*/
explicit CMappedFileLoader(const std::string &mountPoint, const JsonNode & config);
/// Interface implementation
/// @see ISimpleResourceLoader
std::unique_ptr<CInputStream> load(const ResourceID & resourceName) const override;
bool existsResource(const ResourceID & resourceName) const override;
std::string getMountPoint() const override;
boost::optional<boost::filesystem::path> getResourceName(const ResourceID & resourceName) const override;
void updateFilteredFiles(std::function<bool(const std::string &)> filter) const override {}
std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const override;
private:
/** A list of files in this map
* key = ResourceID for resource loader
* value = ResourceID to which file this request will be redirected
*/
std::unordered_map<ResourceID, ResourceID> fileList;
};
class DLL_LINKAGE CFilesystemList : public ISimpleResourceLoader
{
std::vector<std::unique_ptr<ISimpleResourceLoader> > loaders;
std::set<ISimpleResourceLoader *> writeableLoaders;
//FIXME: this is only compile fix, should be removed in the end
CFilesystemList(CFilesystemList &) = delete;
CFilesystemList &operator=(CFilesystemList &) = delete;
public:
CFilesystemList();
~CFilesystemList();
/// Interface implementation
/// @see ISimpleResourceLoader
std::unique_ptr<CInputStream> load(const ResourceID & resourceName) const override;
bool existsResource(const ResourceID & resourceName) const override;
std::string getMountPoint() const override;
boost::optional<boost::filesystem::path> getResourceName(const ResourceID & resourceName) const override;
std::set<boost::filesystem::path> getResourceNames(const ResourceID & resourceName) const override;
void updateFilteredFiles(std::function<bool(const std::string &)> filter) const override;
std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const override;
bool createResource(std::string filename, bool update = false) override;
std::vector<const ISimpleResourceLoader *> getResourcesWithName(const ResourceID & resourceName) const override;
/**
* Adds a resource loader to the loaders list
* Passes loader ownership to this object
*
* @param loader The simple resource loader object to add
* @param writeable - resource shall be treated as writeable
*/
void addLoader(ISimpleResourceLoader * loader, bool writeable);
};
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