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const express = require('express');
const router = express.Router();
const request = require('request');
const iconv = require('iconv-lite');
const getMeetingpointData = require('../lib/getMeetingpointData');
const getURLOfUser = require('../lib/getURLOfUser');
// copied from http://www.meetingpointmco.nl/Roosters-AL/doc/dagroosters/untisscripts.js,
// were using the same code as they do to be sure that we always get the same
// week number.
function getWeekNumber(target) {
const dayNr = (target.getDay() + 6) % 7;
// eslint-disable-next-line
target.setDate(target.getDate() - dayNr + 3);
const firstThursday = target.valueOf();
target.setMonth(0, 1);
if (target.getDay() !== 4) {
// eslint-disable-next-line
target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
}
return 1 + Math.ceil((firstThursday - target) / 604800000);
}
router.get('/:type/:value', (req, res, next) => {
getMeetingpointData().then(({ users }) => {
const { type, value } = req.params;
let { week } = req.query;
const user =
users.filter(user_ => user_.type === type && user_.value === value)[0];
if (!user) {
next(new Error(`${type}${value} is not in the user index.`));
}
if (!week) {
week = getWeekNumber(new Date());
}
const { index } = user;
const scheduleType = req.query.type || 'dag';
const url = getURLOfUser(scheduleType, type, index, week);
request(url, { encoding: null }, (err, data) => {
if (err) {
next(err);
return;
}
const utf8Body = iconv.decode(data.body, 'ISO-8859-1');
res.status(data.statusCode).end(utf8Body);
});
});
});
module.exports = router;
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