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const Promise = require('bluebird');
const cheerio = require('cheerio');
const iconv = require('iconv-lite');
const _ = require('lodash');
const request = Promise.promisify(require('request'));
const getUrlOfUser = require('./getURLOfUser');
let meetingpointData;
let lastUpdate;
function getUsers(page) {
const script = page('script').eq(1).text();
const regexs = [/var classes = \[(.+)\];/, /var teachers = \[(.+)\];/, /var rooms = \[(.+)\];/, /var students = \[(.+)\];/];
const items = regexs.map(regex => script.match(regex)[1].split(',').map(item => item.replace(/"/g, '')));
const classes = items[0].map((item, index) => ({
type: 'c',
value: item,
index,
}));
const teachers = items[1].map((item, index) => ({
type: 't',
value: item,
index,
}));
const rooms = items[2].map((item, index) => ({
type: 'r',
value: item,
index,
}));
const students = items[3].map((item, index) => ({
type: 's',
value: item,
index,
}));
return _.flatten([classes, teachers, rooms, students]);
}
function getWeeks(page) {
const weekSelector = page('select[name="week"]');
const weeks = _.map(weekSelector.children(), option => ({
id: cheerio(option).attr('value'),
text: cheerio(option).text(),
}));
return weeks;
}
function getAltText(page) {
return page('center > font').eq(2).text().trim();
}
function requestData() {
lastUpdate = new Date();
const navbarRequests = [
request('http://www.meetingpointmco.nl/Roosters-AL/doc/dagroosters/frames/navbar.htm', { timeout: 5000 }),
request('http://www.meetingpointmco.nl/Roosters-AL/doc/basisroosters/frames/navbar.htm', { timeout: 5000 }),
];
return Promise.all(navbarRequests)
.then(([dailyScheduleResponse, basisScheduleResponse]) => {
const dailySchedulePage = cheerio.load(dailyScheduleResponse.body);
const basisSchedulePage = cheerio.load(basisScheduleResponse.body);
const users = getUsers(dailySchedulePage);
const dailyScheduleWeeks = getWeeks(dailySchedulePage);
const basisScheduleWeeks = getWeeks(basisSchedulePage);
const teachers = users.filter(user => user.type === 't');
const teacherRequests = teachers.map(teacher =>
request(getUrlOfUser('dag', teacher.type, teacher.index, 7), { encoding: null }));
return Promise.all(teacherRequests).then((teacherResponses) => {
const teachersWithAlts = teacherResponses.map((teacherResponse, index) => {
const utf8Body = iconv.decode(teacherResponse.body, 'iso-8859-1');
const teacherResponseBody = cheerio.load(utf8Body);
const teacherName = getAltText(teacherResponseBody);
return {
...teachers[index],
alt: teacherName,
};
});
meetingpointData = {
users: _.uniqBy(_.flatten([teachersWithAlts, users]), user => `${user.type}/${user.value}`),
dailyScheduleWeeks,
basisScheduleWeeks,
};
return meetingpointData;
});
});
}
function getMeetingpointData() {
if (lastUpdate == null || new Date() - lastUpdate > 30 * 60 * 1000) { // 30 minutes
return requestData();
} else if (!meetingpointData) {
return Promise.reject();
}
return Promise.resolve(meetingpointData);
}
module.exports = getMeetingpointData;
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