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const http = require("http");
const fs = require("fs");
const url = require("url");
const parse = require("./parse.js");
const scrape = require("./scrape.js");
const mysql = require("mysql2");
async function init()
{
const weekdays = [undefined, "MAANANTAI", "TIISTAI", "KESKIVIIKKO", "TORSTAI", "PERJANTAI", undefined];
const build = {
"./index.html": buildMain,
"./index.css": buildDefault,
"./404/index.css": buildDefault,
"./help.png": buildImage
};
const errorPath = "./404/index.html";
// await for needed things in async
let [shiftCont, classCont, foodsThisWeek, foodsNextWeek] = await Promise.all([
openFile("./shifts.txt"),
openFile("./classes.txt"),
scrape.food(scrape.link(1)),
scrape.food(scrape.link(2))
]);
// get the food shift "database"
shiftCont = shiftCont.toString("utf-8").replaceAll("\r", ""); // \r because of the \r\n newline on windows which creates problems
classCont = classCont.toString("utf-8").replaceAll("\r", "");
let DB = parse.build(shiftCont);
parse.classes(classCont, DB);
// get the food "database"
const foods = [foodsThisWeek, foodsNextWeek];
// server code
async function server(req, res)
{
// validate inputs
let q = url.parse(req.url, true);
let ind = q.query.index;
if (typeof ind === "string")
ind = validateIndex(q.query.index.substring(0, 20));
else
ind = "";
let d = q.query.day;
if (typeof d === "string")
d = antiXSS(d);
else
d = "";
q.query = {
index: ind,
day: d
};
let path = "." + antiXSS(q.pathname);
if (path == "./")
path = "./index.html";
// pack the data required by the builders
let data;
const args = {
"path": path,
"path404": errorPath,
"query": q.query,
"db": DB,
"foods": foods
};
// build the page
const buildFound = +(typeof build[path] === "function");
res.writeHead([404, 200][buildFound]);
data = await [build404, build[path]][buildFound](args);
res.write(data);
res.end();
}
// start server
http.createServer(server).listen(8080);
}
function validateIndex(sus)
{
return antiXSS(parse.cluttered(sus));
}
function antiXSS(sus)
{
if (!(typeof sus === "string"))
return "";
return replace(sus, ["<", ">", "(", ")"], ["<", ">", "(", ")"]);
}
function replace(s, from, to)
{
for (let i = 0; i < from.length; i++)
{
s = s.replaceAll(from[i], to[i]);
}
return s;
}
function openFile(path)
{
return new Promise((resolve, reject) =>
{
fs.readFile(path, (err, data) =>
{
if (err)
reject(err);
resolve(data);
})
});
}
async function buildMain(args)
{
const path = args["path"];
const query = args["query"];
const foods = args["foods"];
const index = query.index;
const DB = args["db"];
const data = await openFile(path);
let data_string = data.toString("utf-8");
let res = {};
const d = new Date();
let day = d.getDay();
const actualDay = day;
day = +((day === 0) || (day === 6)) + (+(!(day === 0) && !(day === 6)) * day);
if ((typeof query.day === "string") && (parseInt(query.day).toString() === query.day) && (!isNaN(parseInt(query.day))) && (parseInt(query.day) > 0) && (parseInt(query.day) < 7))
day = parseInt(query.day);
data_string = data_string.replace(`<option value=\"${day}\">`, `<option value=\"${day}\" selected>`);
// get the food shift to res["shift"]
const indexTypes = {
"course": "Kurssin",
"teacher": "Opettajan",
"class": "Luokan"
};
res["shift"] = undefined;
if ((index === undefined) || (index === ""))
res["shift"] = "";
if (res["shift"] === undefined)
{
let shift = parse.get(day, index, DB);
let key = Object.keys(shift)[0];
if (key !== undefined)
{
res["shift"] = key;
res["shift-header"] = `${shift[key][0]}/${shift[key][1]}`;
if (shift[key][2] !== undefined)
res["shift-header"] += `/${shift[key][2]}`
res["index-type"] = "Kurssin";
}
else
{
res["shift"] = -1;
res["shift-header"] = `${index}`;
res["index-type"] = indexTypes[parse.indexType(index)];
if (res["index-type"] === undefined)
res["index-type"] = "";
}
}
if (res["shift"] === -1)
res["shift"] = "Kurssilla/opettajalla/luokalla ei ole ruokailua päivällä tai kurssia ei ole olemassa!";
// get the example input
res["example-input"] = parse.randomIndex(DB, day - 1);
// get the day
let weekdays = ["su", "ma", "ti", "ke", "to", "pe", "la"];
res["day"] = weekdays[day];
if (res["shift"] === "")
data_string = data_string.replace('<div id="shift-result" class="float-block">', '<div id="shift-result" class="float-block" style="display: none;">');
// get the food
let food;
food = foods[ +(day < actualDay) ][day];
if (food !== undefined)
{
res["food-header"] = food[0];
res["food"] = food[1];
}
else
{
res["food-header"] = weekdays[day];
res["food"] = "Päivälle ei löytynyt ruokaa";
}
res["food-header"] = `Päivän ${res["food-header"]} kouluruoka:`;
data_string = build_replace(data_string, res);
return data_string;
}
async function build404(args)
{
const data = await openFile(args["path404"]);
const data_string = data.toString("utf-8");
return data_string.replace("\\(path\\)", args["path"]);
}
async function buildDefault(args)
{
const path = args["path"];
const data = await openFile(path);
return data.toString("utf-8");
}
async function buildImage(args)
{
const path = args["path"];
const data = await openFile(path);
return data;
}
function build_replace(s, dict)
{
for (const [key, val] of Object.entries(dict))
{
s = s.replaceAll(`\\(${key}\\)`, val);
}
return s;
}
init();
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