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"use strict";
const lua = require('./lua.js');
const lauxlib = require('./lauxlib.js');
const llimit = require('./llimit.js');
const setfield = function(L, key, value) {
lua.lua_pushinteger(L, value);
lua.lua_setfield(L, -2, key);
};
const setallfields = function(L, time) {
setfield(L, "sec", time.getSeconds());
setfield(L, "min", time.getMinutes());
setfield(L, "hour", time.getHours());
setfield(L, "day", time.getDate());
setfield(L, "month", time.getMonth());
setfield(L, "year", time.getYear());
setfield(L, "wday", time.getDay());
let now = new Date();
setfield(L, "yday", Math.floor((now - (new Date(now.getFullYear(), 0, 0))) / (1000 * 60 * 60 * 24)));
// setboolfield(L, "isdst", time.get);
};
const L_MAXDATEFIELD = (llimit.MAX_INT / 2);
const getfield = function(L, key, d, delta) {
let t = lua.lua_getfield(L, -1, lua.to_luastring(key)); /* get field and its type */
let res = lua.lua_tointegerx(L, -1);
if (res !== false) { /* field is not an integer? */
if (t != lua.LUA_TNIL) /* some other value? */
return lauxlib.luaL_error(L, lua.to_luastring(`field '${key}' is not an integer`), true);
else if (d < 0) /* absent field; no default? */
return lauxlib.luaL_error(L, lua.to_luastring(`field '${key}' missing in date table`), true);
res = d;
}
else {
if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
return lauxlib.luaL_error(L, lua.to_luastring(`field '${key}' is out-of-bound`), true);
res -= delta;
}
lua.lua_pop(L, 1);
return res;
};
const os_time = function(L) {
let t = new Date();
if (!lua.lua_isnoneornil(L, 1)) /* called with arg */{
lauxlib.luaL_checktype(L, 1, lua.LUA_TTABLE); /* make sure table is at the top */
lua.lua_settop(L, 1);
t.setSeconds(getfield(L, "sec", 0, 0));
t.setSeconds(getfield(L, "min", 0, 0));
t.setSeconds(getfield(L, "hour", 12, 0));
t.setSeconds(getfield(L, "day", -1, 0));
t.setSeconds(getfield(L, "month", -1, 1));
t.setSeconds(getfield(L, "year", -1, 1900));
setallfields(L, t);
}
lua.lua_pushinteger(L, Math.floor(t / 1000));
return 1;
};
const syslib = {
"time": os_time
};
// Only with Node
if (process && process.exit && process.env) {
const os_exit = function(L) {
let status;
if (lua.lua_isboolean(L, 1))
status = (lua.lua_toboolean(L, 1) ? 0 : 1);
else
status = lauxlib.luaL_optinteger(L, 1, 0);
if (lua.lua_toboolean(L, 2))
lua.lua_close(L);
if (L) process.exit(status); /* 'if' to avoid warnings for unreachable 'return' */
return 0;
};
const os_getenv = function(L) {
lua.lua_pushliteral(L, process.env[lua.to_jsstring(lauxlib.luaL_checkstring(L, 1))]); /* if NULL push nil */
return 1;
};
syslib.exit = os_exit;
syslib.getenv = os_getenv;
}
// Only with Node
if (typeof require === "function") {
let fs = false;
let tmp = false;
let child_process = false;
try {
fs = require('fs');
tmp = require('tmp');
child_process = require('child_process');
} catch (e) {}
if (fs && tmp) {
// TODO: on POSIX system, should create the file
const lua_tmpname = function() {
return tmp.tmpNameSync();
};
const os_remove = function(L) {
let filename = lauxlib.luaL_checkstring(L, 1);
try {
if (fs.lstatSync(lua.to_jsstring(filename)).isDirectory()) {
fs.rmdirSync(lua.to_jsstring(filename));
} else {
fs.unlinkSync(lua.to_jsstring(filename));
}
} catch (e) {
return lauxlib.luaL_fileresult(L, false, filename, e);
}
return lauxlib.luaL_fileresult(L, true);
};
const os_rename = function(L) {
let fromname = lua.to_jsstring(lauxlib.luaL_checkstring(L, 1));
let toname = lua.to_jsstring(lauxlib.luaL_checkstring(L, 2));
try {
fs.renameSync(fromname, toname);
} catch (e) {
return lauxlib.luaL_fileresult(L, false, false, e);
}
return lauxlib.luaL_fileresult(L, true);
};
const os_tmpname = function(L) {
let name = lua_tmpname();
if (!name)
return lauxlib.luaL_error(L, lua.to_luastring("unable to generate a unique filename"));
lua.lua_pushstring(L, lua.to_luastring(name));
return 1;
};
syslib.remove = os_remove;
syslib.rename = os_rename;
syslib.tmpname = os_tmpname;
}
if (child_process) {
const os_execute = function(L) {
let cmd = lauxlib.luaL_optstring(L, 1, null);
let out = false;
if (cmd !== null) {
try {
out = child_process.execSync(lua.to_jsstring(cmd));
} catch (e) {
return lauxlib.luaL_execresult(L, false, e);
}
// if (out) console.log(out);
return lauxlib.luaL_execresult(L, true);
} else {
try {
out = child_process.execSync(lua.to_jsstring(cmd));
lua.lua_pushboolean(L, 1);
} catch (e) {
lua.lua_pushboolean(L, 0);
}
// if (out) console.log(out);
return 1;
}
};
syslib.execute = os_execute;
}
}
const luaopen_os = function(L) {
lauxlib.luaL_newlib(L, syslib);
return 1;
};
module.exports.luaopen_os = luaopen_os;
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