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mirror of https://github.com/vcmi/vcmi.git synced 2024-12-24 22:14:36 +02:00
vcmi/lib/filesystem/CFilesystemLoader.h
Ivan Savenko dd73573c5c - vcmi can now calculate crc32 checksum of a file
- reorganized internal filesystem structure - all files from one mod are
now grouped in same FS node
- modhandler will now calculate crc32 checksum for each mod
- modhandler now knows validation status of each mod

todo - use checksum to determine mods that have not changed since last
start and disable validation for them.
2013-11-08 20:36:26 +00:00

67 lines
2.4 KiB
C++

#pragma once
/*
* CFilesystemLoader.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
*
*/
#include "ISimpleResourceLoader.h"
#include "ResourceID.h"
class CFileInfo;
class CInputStream;
/**
* A class which can scan and load files of directories.
*/
class DLL_LINKAGE CFilesystemLoader : public ISimpleResourceLoader
{
public:
/**
* Ctor.
*
* @param baseDirectory Specifies the base directory and their sub-directories which should be indexed.
* @param depth - recursion depth of subdirectories search. 0 = no recursion
*
* @throws std::runtime_error if the base directory is not a directory or if it is not available
*/
explicit CFilesystemLoader(const std::string & mountPoint, const std::string & baseDirectory, size_t depth = 16, bool initial = false);
/// 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;
bool createResource(std::string filename, bool update = false) override;
boost::optional<std::string> getResourceName(const ResourceID & resourceName) const override;
std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const;
private:
/** The base directory which is scanned and indexed. */
std::string baseDirectory;
std::string mountPoint;
/** A list of files in the directory
* key = ResourceID for resource loader
* value = name that can be used to access file
*/
std::unordered_map<ResourceID, std::string> fileList;
/**
* Returns a list of pathnames denoting the files in the directory denoted by this pathname.
*
* 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
* then the file info pathnames are relative to the basedir as well.
*
* @return a list of pathnames denoting the files and directories in the directory denoted by this pathname
* 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.
*/
std::unordered_map<ResourceID, std::string> listFiles(const std::string &mountPoint, size_t depth, bool initial) const;
};