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/*
* CFilesystemLoader.cpp, 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 "StdInc.h"
#include "CFilesystemLoader.h"
#include "CFileInputStream.h"
#include "FileStream.h"
namespace bfs = boost::filesystem;
CFilesystemLoader::CFilesystemLoader(std::string _mountPoint, bfs::path baseDirectory, size_t depth, bool initial):
baseDirectory(std::move(baseDirectory)),
mountPoint(std::move(_mountPoint)),
fileList(listFiles(mountPoint, depth, initial))
{
logGlobal->trace("File system loaded, %d files found", fileList.size());
}
std::unique_ptr<CInputStream> CFilesystemLoader::load(const ResourceID & resourceName) const
{
assert(fileList.count(resourceName));
bfs::path file = baseDirectory / fileList.at(resourceName);
logGlobal->trace("loading %s", file.string());
return make_unique<CFileInputStream>(file);
}
bool CFilesystemLoader::existsResource(const ResourceID & resourceName) const
{
return fileList.count(resourceName);
}
std::string CFilesystemLoader::getMountPoint() const
{
return mountPoint;
}
boost::optional<boost::filesystem::path> CFilesystemLoader::getResourceName(const ResourceID & resourceName) const
{
assert(existsResource(resourceName));
return baseDirectory / fileList.at(resourceName);
}
void CFilesystemLoader::updateFilteredFiles(std::function<bool(const std::string &)> filter) const
{
if (filter(mountPoint))
{
fileList = listFiles(mountPoint, 1, false);
}
}
std::unordered_set<ResourceID> CFilesystemLoader::getFilteredFiles(std::function<bool(const ResourceID &)> filter) const
{
std::unordered_set<ResourceID> foundID;
for (auto & file : fileList)
{
if (filter(file.first))
foundID.insert(file.first);
}
return foundID;
}
bool CFilesystemLoader::createResource(std::string filename, bool update)
{
ResourceID resID(filename);
if (fileList.find(resID) != fileList.end())
return true;
if (!boost::iequals(mountPoint, filename.substr(0, mountPoint.size())))
{
logGlobal->trace("Can't create file: wrong mount point: %s", mountPoint);
return false;
}
filename = filename.substr(mountPoint.size());
if (!update)
{
if (!FileStream::CreateFile(baseDirectory / filename))
return false;
}
fileList[resID] = filename;
return true;
}
std::unordered_map<ResourceID, bfs::path> CFilesystemLoader::listFiles(const std::string &mountPoint, size_t depth, bool initial) const
{
static const EResType::Type initArray[] = {
EResType::DIRECTORY,
EResType::TEXT,
EResType::ARCHIVE_LOD,
EResType::ARCHIVE_VID,
EResType::ARCHIVE_SND,
EResType::ARCHIVE_ZIP };
static const std::set<EResType::Type> initialTypes(initArray, initArray + ARRAY_COUNT(initArray));
assert(bfs::is_directory(baseDirectory));
std::unordered_map<ResourceID, bfs::path> fileList;
std::vector<bfs::path> path; //vector holding relative path to our file
bfs::recursive_directory_iterator enddir;
bfs::recursive_directory_iterator it(baseDirectory, bfs::symlink_option::recurse);
for(; it != enddir; ++it)
{
EResType::Type type;
if (bfs::is_directory(it->status()))
{
path.resize(it.level() + 1);
path.back() = it->path().filename();
// don't iterate into directory if depth limit reached
it.no_push(depth <= it.level());
type = EResType::DIRECTORY;
}
else
type = EResTypeHelper::getTypeFromExtension(it->path().extension().string());
if (!initial || vstd::contains(initialTypes, type))
{
//reconstruct relative filename (not possible via boost AFAIK)
bfs::path filename;
const size_t iterations = std::min((size_t)it.level(), path.size());
if (iterations)
{
filename = path.front();
for (size_t i = 1; i < iterations; ++i)
filename /= path[i];
filename /= it->path().filename();
}
else
filename = it->path().filename();
std::string resName;
if (bfs::path::preferred_separator != '/')
{
// resource names are using UNIX slashes (/)
resName.reserve(resName.size() + filename.native().size());
resName = mountPoint;
for (const char c : filename.string())
if (c != bfs::path::preferred_separator)
resName.push_back(c);
else
resName.push_back('/');
}
else
resName = mountPoint + filename.string();
fileList[ResourceID(resName, type)] = std::move(filename);
}
}
return fileList;
}
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