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102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/*
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* AdapterLoaders.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 "ISimpleResourceLoader.h"
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#include "ResourceID.h"
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VCMI_LIB_NAMESPACE_BEGIN
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class CInputStream;
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class JsonNode;
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/**
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* Class that implements file mapping (aka *nix symbolic links)
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* Uses json file as input, content is map:
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* "fileA.txt" : "fileB.txt"
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* Note that extension is necessary, but used only to determine type
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*
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* fileA - file which will be replaced
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* fileB - file which will be used as replacement
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*/
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class DLL_LINKAGE CMappedFileLoader : public ISimpleResourceLoader
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{
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public:
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/**
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* Ctor.
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*
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* @param config Specifies filesystem configuration
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*/
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explicit CMappedFileLoader(const std::string &mountPoint, const JsonNode & config);
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/// Interface implementation
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/// @see ISimpleResourceLoader
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std::unique_ptr<CInputStream> load(const ResourceID & resourceName) const override;
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bool existsResource(const ResourceID & resourceName) const override;
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std::string getMountPoint() const override;
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std::optional<boost::filesystem::path> getResourceName(const ResourceID & resourceName) const override;
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void updateFilteredFiles(std::function<bool(const std::string &)> filter) const override {}
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std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const override;
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private:
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/** A list of files in this map
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* key = ResourceID for resource loader
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* value = ResourceID to which file this request will be redirected
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*/
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std::unordered_map<ResourceID, ResourceID> fileList;
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};
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class DLL_LINKAGE CFilesystemList : public ISimpleResourceLoader
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{
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std::vector<std::unique_ptr<ISimpleResourceLoader> > loaders;
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std::set<ISimpleResourceLoader *> writeableLoaders;
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//FIXME: this is only compile fix, should be removed in the end
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CFilesystemList(CFilesystemList &) = delete;
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CFilesystemList &operator=(CFilesystemList &) = delete;
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public:
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CFilesystemList();
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~CFilesystemList();
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/// Interface implementation
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/// @see ISimpleResourceLoader
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std::unique_ptr<CInputStream> load(const ResourceID & resourceName) const override;
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bool existsResource(const ResourceID & resourceName) const override;
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std::string getMountPoint() const override;
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std::optional<boost::filesystem::path> getResourceName(const ResourceID & resourceName) const override;
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std::set<boost::filesystem::path> getResourceNames(const ResourceID & resourceName) const override;
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void updateFilteredFiles(std::function<bool(const std::string &)> filter) const override;
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std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const override;
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bool createResource(std::string filename, bool update = false) override;
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std::vector<const ISimpleResourceLoader *> getResourcesWithName(const ResourceID & resourceName) const override;
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/**
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* Adds a resource loader to the loaders list
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* Passes loader ownership to this object
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*
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* @param loader The simple resource loader object to add
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* @param writeable - resource shall be treated as writeable
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*/
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void addLoader(ISimpleResourceLoader * loader, bool writeable);
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/**
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* Removes loader from the loader list
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* Take care about memory deallocation
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*
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* @param loader The simple resource loader object to remove
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*
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* @return if loader was successfully removed
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*/
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bool removeLoader(ISimpleResourceLoader * loader);
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};
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VCMI_LIB_NAMESPACE_END
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