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66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
/*
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* CFilesystemLoader.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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class CInputStream;
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/**
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* A class which can scan and load files of directories.
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*/
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class DLL_LINKAGE CFilesystemLoader : 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 baseDirectory Specifies the base directory and their sub-directories which should be indexed.
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* @param depth - recursion depth of subdirectories search. 0 = no recursion
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*
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* @throws std::runtime_error if the base directory is not a directory or if it is not available
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*/
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explicit CFilesystemLoader(std::string mountPoint, boost::filesystem::path baseDirectory, size_t depth = 16, bool initial = false);
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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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bool createResource(std::string filename, bool update = false) override;
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boost::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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/** The base directory which is scanned and indexed. */
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boost::filesystem::path baseDirectory;
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std::string mountPoint;
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/** A list of files in the directory
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* key = ResourceID for resource loader
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* value = name that can be used to access file
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*/
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mutable std::unordered_map<ResourceID, boost::filesystem::path> fileList;
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/**
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* Returns a list of pathnames denoting the files in the directory denoted by this pathname.
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*
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* If the pathname of this directory is absolute, then the file info pathnames are absolute as well. If the pathname of this directory is relative
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* then the file info pathnames are relative to the basedir as well.
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*
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* @return a list of pathnames denoting the files and directories in the directory denoted by this pathname
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* The array will be empty if the directory is empty. Ptr is null if the directory doesn't exist or if it isn't a directory.
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*/
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std::unordered_map<ResourceID, boost::filesystem::path> listFiles(const std::string &mountPoint, size_t depth, bool initial) const;
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};
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