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goldberg_emulator/dll/local_storage.cpp

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/* Copyright (C) 2019 Mr Goldberg
This file is part of the Goldberg Emulator
The Goldberg Emulator is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
The Goldberg Emulator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the Goldberg Emulator; if not, see
<http://www.gnu.org/licenses/>. */
#include "local_storage.h"
#include <fstream>
#include <algorithm>
#include <iterator>
#include <iomanip>
struct File_Data {
std::string name;
};
#ifdef NO_DISK_WRITES
std::string Local_Storage::get_program_path()
{
return " ";
}
std::string Local_Storage::get_user_appdata_path()
{
return " ";
}
std::string Local_Storage::get_game_settings_path()
{
return " ";
}
std::string Local_Storage::get_path(std::string folder)
{
return "";
}
std::string Local_Storage::get_global_settings_path()
{
return "";
}
Local_Storage::Local_Storage(std::string save_directory)
{
}
void Local_Storage::setAppId(uint32 appid)
{
}
int Local_Storage::store_file_data(std::string folder, std::string file, char *data, unsigned int length)
{
return -1;
}
int Local_Storage::store_data(std::string folder, std::string file, char *data, unsigned int length)
{
return -1;
}
int Local_Storage::store_data_settings(std::string file, char *data, unsigned int length)
{
return -1;
}
int Local_Storage::get_file_data(std::string full_path, char *data, unsigned int max_length, unsigned int offset)
{
return -1;
}
int Local_Storage::get_data(std::string folder, std::string file, char *data, unsigned int max_length, unsigned int offset)
{
return -1;
}
int Local_Storage::get_data_settings(std::string file, char *data, unsigned int max_length)
{
return 0;
}
int Local_Storage::count_files(std::string folder)
{
return 0;
}
bool Local_Storage::file_exists(std::string folder, std::string file)
{
return false;
}
unsigned int Local_Storage::file_size(std::string folder, std::string file)
{
return 0;
}
bool Local_Storage::file_delete(std::string folder, std::string file)
{
return false;
}
uint64_t Local_Storage::file_timestamp(std::string folder, std::string file)
{
return 0;
}
bool Local_Storage::iterate_file(std::string folder, int index, char *output_filename, int32 *output_size)
{
return false;
}
bool Local_Storage::update_save_filenames(std::string folder)
{
return true;
}
bool Local_Storage::load_inventory_file(nlohmann::json& json, std::string const&file)
{
return true;
}
bool Local_Storage::write_inventory_file(nlohmann::json const& json, std::string const&file)
{
return true;
}
std::vector<std::string> Local_Storage::get_filenames_path(std::string path)
{
return std::vector<std::string>();
}
#else
#if defined(WIN32) || defined(_WIN32)
#include <windows.h>
static BOOL DirectoryExists(LPCSTR szPath)
{
DWORD dwAttrib = GetFileAttributesA(szPath);
return (dwAttrib != INVALID_FILE_ATTRIBUTES &&
(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}
static void createDirectoryRecursively(std::string path)
{
unsigned long long pos = 0;
do
{
pos = path.find_first_of("\\/", pos + 1);
CreateDirectoryA(path.substr(0, pos).c_str(), NULL);
} while (pos != std::string::npos);
}
static void create_directory(std::string strPath)
{
if (DirectoryExists(strPath.c_str()) == FALSE)
createDirectoryRecursively(strPath);
}
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
static std::vector<struct File_Data> get_filenames(std::string strPath)
{
std::vector<struct File_Data> output;
strPath = strPath.append("\\*");
WIN32_FIND_DATAA ffd;
HANDLE hFind = INVALID_HANDLE_VALUE;
// Start iterating over the files in the path directory.
hFind = ::FindFirstFileA (strPath.c_str(), &ffd);
if (hFind != INVALID_HANDLE_VALUE)
{
do // Managed to locate and create an handle to that folder.
{
if (strcmp(".", ffd.cFileName) == 0) continue;
if (strcmp("..", ffd.cFileName) == 0) continue;
struct File_Data f_data;
f_data.name = ffd.cFileName;
output.push_back(f_data);
} while (::FindNextFileA(hFind, &ffd) == TRUE);
::FindClose(hFind);
} else {
//printf("Failed to find path: %s", strPath.c_str());
}
return output;
}
static std::vector<struct File_Data> get_filenames_recursive(std::string base_path)
{
if (base_path.back() == *PATH_SEPARATOR)
base_path.pop_back();
std::vector<struct File_Data> output;
std::string strPath = base_path;
strPath = strPath.append("\\*");
WIN32_FIND_DATAA ffd;
HANDLE hFind = INVALID_HANDLE_VALUE;
// Start iterating over the files in the path directory.
hFind = ::FindFirstFileA (strPath.c_str(), &ffd);
if (hFind != INVALID_HANDLE_VALUE)
{
do // Managed to locate and create an handle to that folder.
{
if (strcmp(".", ffd.cFileName) == 0) continue;
if (strcmp("..", ffd.cFileName) == 0) continue;
if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
// Construct new path from our base path
std::string dir_name = ffd.cFileName;
std::string path = base_path;
path += PATH_SEPARATOR;
path += dir_name;
std::vector<struct File_Data> lower = get_filenames_recursive(path);
std::transform(lower.begin(), lower.end(), std::back_inserter(output), [&dir_name](File_Data f) {f.name = dir_name + "\\" + f.name; return f;});
} else {
File_Data f;
f.name = ffd.cFileName;
output.push_back(f);
}
} while (::FindNextFileA(hFind, &ffd) == TRUE);
::FindClose(hFind);
} else {
//printf("Failed to find path: %s", strPath.c_str());
}
return output;
}
#else
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <dirent.h>
#define PATH_MAX_STRING_SIZE 512
/* recursive mkdir */
static int mkdir_p(const char *dir, const mode_t mode) {
char tmp[PATH_MAX_STRING_SIZE];
char *p = NULL;
struct stat sb;
size_t len;
/* copy path */
len = strnlen (dir, PATH_MAX_STRING_SIZE);
if (len == 0 || len == PATH_MAX_STRING_SIZE) {
return -1;
}
memcpy (tmp, dir, len);
tmp[len] = '\0';
/* remove trailing slash */
if(tmp[len - 1] == '/') {
tmp[len - 1] = '\0';
}
/* check if path exists and is a directory */
if (stat (tmp, &sb) == 0) {
if (S_ISDIR (sb.st_mode)) {
return 0;
}
}
/* recursive mkdir */
for(p = tmp + 1; *p; p++) {
if(*p == '/') {
*p = 0;
/* test path */
if (stat(tmp, &sb) != 0) {
/* path does not exist - create directory */
if (mkdir(tmp, mode) < 0) {
return -1;
}
} else if (!S_ISDIR(sb.st_mode)) {
/* not a directory */
return -1;
}
*p = '/';
}
}
/* test path */
if (stat(tmp, &sb) != 0) {
/* path does not exist - create directory */
if (mkdir(tmp, mode) < 0) {
return -1;
}
} else if (!S_ISDIR(sb.st_mode)) {
/* not a directory */
return -1;
}
return 0;
}
static void create_directory(std::string strPath)
{
mkdir_p(strPath.c_str(), 0777);
}
static std::vector<struct File_Data> get_filenames(std::string strPath)
{
DIR *dp;
int i = 0;
struct dirent *ep;
std::vector<struct File_Data> output;
dp = opendir (strPath.c_str());
if (dp != NULL)
{
while ((ep = readdir (dp))) {
if (memcmp(ep->d_name, ".", 2) != 0 && memcmp(ep->d_name, "..", 3) != 0) {
struct File_Data f_data;
f_data.name = ep->d_name;
output.push_back(f_data);
i++;
}
}
(void) closedir (dp);
}
return output;
}
static std::vector<struct File_Data> get_filenames_recursive(std::string base_path)
{
std::vector<struct File_Data> output;
std::string path;
struct dirent *dp;
DIR *dir = opendir(base_path.c_str());
// Unable to open directory stream
if (!dir)
return output;
while ((dp = readdir(dir)) != NULL)
{
if (strcmp(dp->d_name, ".") != 0 && strcmp(dp->d_name, "..") != 0)
{
if (dp->d_type == DT_REG) {
File_Data f;
f.name = dp->d_name;
output.push_back(f);
} else if (dp->d_type == DT_DIR) {
// Construct new path from our base path
std::string dir_name = dp->d_name;
path = base_path;
path += "/";
path += dir_name;
std::vector<struct File_Data> lower = get_filenames_recursive(path);
std::transform(lower.begin(), lower.end(), std::back_inserter(output), [&dir_name](File_Data f) {f.name = dir_name + "/" + f.name; return f;});
}
}
}
closedir(dir);
return output;
}
#endif
std::string Local_Storage::get_program_path()
{
return get_full_program_path();
}
std::string Local_Storage::get_game_settings_path()
{
return get_program_path().append(game_settings_folder).append(PATH_SEPARATOR);
}
#if defined(STEAM_WIN32)
#include <shlobj.h>
#include <sstream>
#endif
std::string Local_Storage::get_user_appdata_path()
{
std::string user_appdata_path = "SAVE";
#if defined(STEAM_WIN32)
CHAR szPath[MAX_PATH] = {};
HRESULT hr = SHGetFolderPathA(NULL, CSIDL_APPDATA, NULL, 0, szPath);
if (SUCCEEDED(hr)) {
user_appdata_path = szPath;
}
#else
/* $XDG_DATA_HOME defines the base directory relative to which user specific data files should be stored.
If $XDG_DATA_HOME is either not set or empty, a default equal to $HOME/.local/share should be used. */
char *datadir = getenv("XDG_DATA_HOME");
if (datadir) {
user_appdata_path = datadir;
} else {
char *homedir = getenv("HOME");
if (homedir) {
user_appdata_path = std::string(homedir) + "/.local/share";
}
}
#endif
return user_appdata_path.append(PATH_SEPARATOR).append(PROGRAM_NAME).append(" Saves");
}
static std::string replace_with(std::string s, std::string const &old, const char *new_str)
{
int pos;
while ((pos = s.find(old)) != std::string::npos)
s.replace(pos, old.length(), new_str);
return s;
}
static std::string sanitize_file_name(std::string name)
{
//I'm not sure all of these are necessary but just to be sure
if (name[0] == '.' && name.size() > 2 && (name[1] == '\\' || name[1] == '/')) name.erase(0, 2);
#if defined(STEAM_WIN32)
name = replace_with(name, "/", PATH_SEPARATOR);
#else
//On linux does using "\\" in a remote storage file name create a directory?
//I didn't test but I'm going to say yes
name = replace_with(name, "\\", PATH_SEPARATOR);
#endif
name = replace_with(name, "|", ".V_SLASH.");
name = replace_with(name, ":", ".COLON.");
name = replace_with(name, "*", ".ASTERISK.");
name = replace_with(name, "\"", ".QUOTE.");
name = replace_with(name, "?", ".Q_MARK.");
return name;
}
static std::string desanitize_file_name(std::string name)
{
//I'm not sure all of these are necessary but just to be sure
name = replace_with(name, ".SLASH.", "/");
name = replace_with(name, ".B_SLASH.", "\\");
name = replace_with(name, ".F_SLASH.", "/");
name = replace_with(name, ".V_SLASH.", "|");
name = replace_with(name, ".COLON.", ":");
name = replace_with(name, ".ASTERISK.", "*");
name = replace_with(name, ".QUOTE.", "\"");
name = replace_with(name, ".Q_MARK.", "?");
return name;
}
Local_Storage::Local_Storage(std::string save_directory)
{
this->save_directory = save_directory;
if (this->save_directory.back() != *PATH_SEPARATOR) {
this->save_directory.append(PATH_SEPARATOR);
}
}
void Local_Storage::setAppId(uint32 appid)
{
this->appid = std::to_string(appid) + PATH_SEPARATOR;
}
int Local_Storage::store_file_data(std::string folder, std::string file, char *data, unsigned int length)
{
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
file = sanitize_file_name(file);
std::string::size_type pos = file.rfind(PATH_SEPARATOR);
std::string file_folder;
if (pos == 0 || pos == std::string::npos) {
file_folder = "";
} else {
file_folder = file.substr(0,pos);
}
create_directory(folder + file_folder);
std::ofstream myfile;
myfile.open(folder + file, std::ios::binary | std::ios::out);
if (!myfile.is_open()) return -1;
myfile.write(data, length);
int position = myfile.tellp();
myfile.close();
return position;
}
std::string Local_Storage::get_path(std::string folder)
{
std::string path = save_directory + appid + folder;
create_directory(path);
return path;
}
std::string Local_Storage::get_global_settings_path()
{
return save_directory + settings_storage_folder + PATH_SEPARATOR;
}
std::vector<std::string> Local_Storage::get_filenames_path(std::string path)
{
if (path.back() != *PATH_SEPARATOR) {
path.append(PATH_SEPARATOR);
}
std::vector<struct File_Data> filenames = get_filenames(path);
std::vector<std::string> output;
std::transform(filenames.begin(), filenames.end(), std::back_inserter(output), [](struct File_Data d) { return d.name;});
return output;
}
int Local_Storage::store_data(std::string folder, std::string file, char *data, unsigned int length)
{
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
return store_file_data(save_directory + appid + folder, file, data, length);
}
int Local_Storage::store_data_settings(std::string file, char *data, unsigned int length)
{
return store_file_data(get_global_settings_path(), file, data, length);
}
int Local_Storage::get_file_data(std::string full_path, char *data, unsigned int max_length, unsigned int offset)
{
std::ifstream myfile;
myfile.open(full_path, std::ios::binary | std::ios::in);
if (!myfile.is_open()) return -1;
myfile.seekg (offset, std::ios::beg);
myfile.read (data, max_length);
myfile.close();
return myfile.gcount();
}
int Local_Storage::get_data(std::string folder, std::string file, char *data, unsigned int max_length, unsigned int offset)
{
file = sanitize_file_name(file);
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::string full_path = save_directory + appid + folder + file;
return get_file_data(full_path, data, max_length, offset);
}
int Local_Storage::get_data_settings(std::string file, char *data, unsigned int max_length)
{
file = sanitize_file_name(file);
std::string full_path = get_global_settings_path() + file;
return get_file_data(full_path, data, max_length);
}
int Local_Storage::count_files(std::string folder)
{
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
return get_filenames_recursive(save_directory + appid + folder).size();
}
bool Local_Storage::file_exists(std::string folder, std::string file)
{
file = sanitize_file_name(file);
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::string full_path = save_directory + appid + folder + file;
struct stat buffer;
if (stat(full_path.c_str(), &buffer) != 0)
return false;
#if defined(STEAM_WIN32)
if ( buffer.st_mode & _S_IFDIR)
return false;
#else
if (S_ISDIR(buffer.st_mode))
return false;
#endif
return true;
}
unsigned int Local_Storage::file_size(std::string folder, std::string file)
{
file = sanitize_file_name(file);
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::string full_path = save_directory + appid + folder + file;
struct stat buffer = {};
if (stat (full_path.c_str(), &buffer) != 0) return 0;
return buffer.st_size;
}
bool Local_Storage::file_delete(std::string folder, std::string file)
{
file = sanitize_file_name(file);
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::string full_path = save_directory + appid + folder + file;
return remove(full_path.c_str()) == 0;
}
uint64_t Local_Storage::file_timestamp(std::string folder, std::string file)
{
file = sanitize_file_name(file);
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::string full_path = save_directory + appid + folder + file;
struct stat buffer = {};
if (stat (full_path.c_str(), &buffer) != 0) return 0;
return buffer.st_mtime;
}
bool Local_Storage::iterate_file(std::string folder, int index, char *output_filename, int32 *output_size)
{
if (folder.back() != *PATH_SEPARATOR) {
folder.append(PATH_SEPARATOR);
}
std::vector<struct File_Data> files = get_filenames_recursive(save_directory + appid + folder);
if (index < 0 || index >= files.size()) return false;
std::string name = desanitize_file_name(files[index].name);
if (output_size) *output_size = file_size(folder, name);
#if defined(STEAM_WIN32)
name = replace_with(name, PATH_SEPARATOR, "/");
#endif
strcpy(output_filename, name.c_str());
return true;
}
bool Local_Storage::update_save_filenames(std::string folder)
{
std::vector<struct File_Data> files = get_filenames_recursive(save_directory + appid + folder);
for (auto &f : files) {
std::string path = f.name;
PRINT_DEBUG("Local_Storage:: remote file %s\n", path.c_str());
std::string to = sanitize_file_name(desanitize_file_name(path));
if (path != to && !file_exists(folder, to)) {
//create the folder
store_data(folder, to, (char *)"", 0);
file_delete(folder, to);
std::string from = (save_directory + appid + folder + PATH_SEPARATOR + path);
to = (save_directory + appid + folder + PATH_SEPARATOR + to);
PRINT_DEBUG("Local_Storage::update_save_filenames renaming %s to %s\n", from.c_str(), to.c_str());
if (std::rename(from.c_str(), to.c_str()) < 0) {
PRINT_DEBUG("ERROR RENAMING\n");
}
}
}
return true;
}
bool Local_Storage::load_inventory_file(nlohmann::json& json, std::string const&file)
{
std::string inv_path = std::move(save_directory + appid + inventory_storage_folder + PATH_SEPARATOR + file);
std::ifstream inventory_file(inv_path);
// If there is a file and we opened it
if (inventory_file)
{
inventory_file.seekg(0, std::ios::end);
size_t size = inventory_file.tellg();
std::string buffer(size, '\0');
inventory_file.seekg(0);
// Read it entirely, if the .json file gets too big,
// I should look into this and split reads into smaller parts.
inventory_file.read(&buffer[0], size);
inventory_file.close();
try {
json = std::move(nlohmann::json::parse(buffer));
PRINT_DEBUG("Loaded inventory \"%s\". Loaded %u items.\n", inv_path.c_str(), json.size());
return true;
} catch (std::exception& e) {
PRINT_DEBUG("Error while parsing \"%s\" inventory json: %s\n", inv_path.c_str(), e.what());
}
}
else
{
PRINT_DEBUG("Couldn't open file \"%s\" to read inventory\n", inv_path.c_str());
}
return false;
}
bool Local_Storage::write_inventory_file(nlohmann::json const& json, std::string const&file)
{
std::string inv_path = std::move(save_directory + appid + inventory_storage_folder);
create_directory(inv_path);
std::ofstream inventory_file(inv_path + PATH_SEPARATOR + file, std::ios::trunc | std::ios::out);
if (inventory_file)
{
inventory_file << std::setw(2) << json;
return true;
}
PRINT_DEBUG("Couldn't open file \"%s\" to write inventory\n", inv_path.c_str());
return false;
}
#endif
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