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// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "libaegisub/lua/utils.h"
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/range/size.hpp>
namespace {
using namespace agi::lua;
using namespace agi::fs;
namespace bfs = boost::filesystem;
template<void (*func)(lua_State *L)>
int wrap(lua_State *L) {
try {
func(L);
return 1;
}
catch (bfs::filesystem_error const& e) {
lua_pushnil(L);
push_value(L, e.what());
return 2;
}
catch (agi::Exception const& e) {
lua_pushnil(L);
push_value(L, e.GetMessage());
return 2;
}
catch (error_tag) {
return lua_error(L);
}
}
void chdir(lua_State *L) {
bfs::current_path(check_string(L, 1));
push_value(L, true);
}
void currentdir(lua_State *L) {
push_value(L, bfs::current_path());
}
void mkdir(lua_State *L) {
CreateDirectory(check_string(L, 1));
push_value(L, true);
}
void rmdir(lua_State *L) {
Remove(check_string(L, 1));
push_value(L, true);
}
void touch(lua_State *L) {
Touch(check_string(L, 1));
push_value(L, true);
}
int dir_next(lua_State *L) {
auto& it = get<agi::fs::DirectoryIterator>(L, 1, "aegisub.lfs.dir");
if (it == end(it)) return 0;
push_value(L, *it);
++it;
return 1;
}
int dir_close(lua_State *L) {
auto& it = get<agi::fs::DirectoryIterator>(L, 1, "aegisub.lfs.dir");
// Convert to end iterator rather than destroying to avoid crashes if this
// is called multiple times
it = DirectoryIterator();
return 0;
}
int dir(lua_State *L) {
const path p = check_string(L, 1);
push_value(L, dir_next);
make<agi::fs::DirectoryIterator>(L, "aegisub.lfs.dir", check_string(L, 1), "");
return 2;
}
void attributes(lua_State *L) {
static std::pair<const char *, void (*)(lua_State *, path const&)> fields[] = {
{"mode", [](lua_State *L, path const& p) {
switch (status(p).type()) {
case bfs::file_not_found: lua_pushnil(L); break;
case bfs::regular_file: push_value(L, "file"); break;
case bfs::directory_file: push_value(L, "directory"); break;
case bfs::symlink_file: push_value(L, "link"); break;
case bfs::block_file: push_value(L, "block device"); break;
case bfs::character_file: push_value(L, "char device"); break;
case bfs::fifo_file: push_value(L, "fifo"); break;
case bfs::socket_file: push_value(L, "socket"); break;
case bfs::reparse_file: push_value(L, "reparse point"); break;
default: push_value(L, "other"); break;
}
}},
{"modification", [](lua_State *L, path const& p) { push_value(L, ModifiedTime(p)); }},
{"size", [](lua_State *L, path const& p) { push_value(L, Size(p)); }}
};
const path p = check_string(L, 1);
const auto field = get_string(L, 2);
if (!field.empty()) {
for (const auto getter : fields) {
if (field == getter.first) {
getter.second(L, p);
return;
}
}
error(L, "Invalid attribute name: %s", field.c_str());
}
lua_createtable(L, 0, boost::size(fields));
for (const auto getter : fields) {
getter.second(L, p);
lua_setfield(L, -2, getter.first);
}
}
}
extern "C" int luaopen_lfs(lua_State *L) {
if (luaL_newmetatable(L, "aegisub.lfs.dir")) {
set_field<dir_close>(L, "__gc");
lua_createtable(L, 0, 2);
set_field<dir_next>(L, "next");
set_field<dir_close>(L, "close");
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
}
const struct luaL_Reg lib[] = {
{"attributes", wrap<attributes>},
{"chdir", wrap<chdir>},
{"currentdir", wrap<currentdir>},
{"dir", exception_wrapper<dir>},
{"mkdir", wrap<mkdir>},
{"rmdir", wrap<rmdir>},
{"touch", wrap<touch>},
{nullptr, nullptr},
};
lua_createtable(L, 0, boost::size(lib) - 1);
luaL_register(L, nullptr, lib);
lua_pushvalue(L, -1);
lua_setglobal(L, "lfs");
return 1;
}
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