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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <set>
#include <unordered_set>
#include <utility>
#include "core/file_sys/vfs/vfs_layered.h"
namespace FileSys {
LayeredVfsDirectory::LayeredVfsDirectory(std::vector<VirtualDir> dirs_, std::string name_)
: dirs(std::move(dirs_)), name(std::move(name_)) {}
LayeredVfsDirectory::~LayeredVfsDirectory() = default;
VirtualDir LayeredVfsDirectory::MakeLayeredDirectory(std::vector<VirtualDir> dirs,
std::string name) {
if (dirs.empty())
return nullptr;
if (dirs.size() == 1)
return dirs[0];
return VirtualDir(new LayeredVfsDirectory(std::move(dirs), std::move(name)));
}
VirtualFile LayeredVfsDirectory::GetFileRelative(std::string_view path) const {
for (const auto& layer : dirs) {
const auto file = layer->GetFileRelative(path);
if (file != nullptr)
return file;
}
return nullptr;
}
VirtualDir LayeredVfsDirectory::GetDirectoryRelative(std::string_view path) const {
std::vector<VirtualDir> out;
for (const auto& layer : dirs) {
auto dir = layer->GetDirectoryRelative(path);
if (dir != nullptr) {
out.emplace_back(std::move(dir));
}
}
return MakeLayeredDirectory(std::move(out));
}
VirtualFile LayeredVfsDirectory::GetFile(std::string_view file_name) const {
return GetFileRelative(file_name);
}
VirtualDir LayeredVfsDirectory::GetSubdirectory(std::string_view subdir_name) const {
return GetDirectoryRelative(subdir_name);
}
std::string LayeredVfsDirectory::GetFullPath() const {
return dirs[0]->GetFullPath();
}
std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
std::vector<VirtualFile> out;
std::unordered_set<std::string> out_names;
for (const auto& layer : dirs) {
for (auto& file : layer->GetFiles()) {
const auto [it, is_new] = out_names.emplace(file->GetName());
if (is_new) {
out.emplace_back(std::move(file));
}
}
}
return out;
}
std::vector<VirtualDir> LayeredVfsDirectory::GetSubdirectories() const {
std::vector<VirtualDir> out;
std::unordered_set<std::string> out_names;
for (const auto& layer : dirs) {
for (const auto& sd : layer->GetSubdirectories()) {
out_names.emplace(sd->GetName());
}
}
out.reserve(out_names.size());
for (const auto& subdir : out_names) {
out.emplace_back(GetSubdirectory(subdir));
}
return out;
}
bool LayeredVfsDirectory::IsWritable() const {
return false;
}
bool LayeredVfsDirectory::IsReadable() const {
return true;
}
std::string LayeredVfsDirectory::GetName() const {
return name.empty() ? dirs[0]->GetName() : name;
}
VirtualDir LayeredVfsDirectory::GetParentDirectory() const {
return dirs[0]->GetParentDirectory();
}
VirtualDir LayeredVfsDirectory::CreateSubdirectory(std::string_view subdir_name) {
return nullptr;
}
VirtualFile LayeredVfsDirectory::CreateFile(std::string_view file_name) {
return nullptr;
}
bool LayeredVfsDirectory::DeleteSubdirectory(std::string_view subdir_name) {
return false;
}
bool LayeredVfsDirectory::DeleteFile(std::string_view file_name) {
return false;
}
bool LayeredVfsDirectory::Rename(std::string_view new_name) {
name = new_name;
return true;
}
} // namespace FileSys
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