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const Promise = require('bluebird');
const cheerio = require('cheerio');
const _ = require('lodash');
const request = Promise.promisify(require('request'));
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, '')));
return []
.concat(items[0].map((item, index) => ({
type: 'c',
value: item,
index,
})))
.concat(items[1].map((item, index) => ({
type: 't',
value: item,
index,
})))
.concat(items[2].map((item, index) => ({
type: 'r',
value: item,
index,
})))
.concat(items[3].map((item, index) => ({
type: 's',
value: item,
index,
})));
}
function getValidWeekNumbers(page) {
const weekSelector = page('select[name="week"]');
const weekNumbers = _.map(weekSelector.children(), option => parseInt(option.attribs.value, 10));
return weekNumbers;
}
function requestData() {
lastUpdate = new Date();
return request('http://www.meetingpointmco.nl/Roosters-AL/doc/dagroosters/frames/navbar.htm', { timeout: 5000 }).then((response) => {
const page = cheerio.load(response.body);
const users = getUsers(page);
const validWeekNumbers = getValidWeekNumbers(page);
meetingpointData = { users, validWeekNumbers };
return meetingpointData;
});
}
function getMeetingpointData() {
if (lastUpdate == null || new Date() - lastUpdate > 10 * 60 * 1000) { // 10 minutes
return requestData();
} else if (!meetingpointData) {
return Promise.reject();
}
return Promise.resolve(meetingpointData);
}
module.exports = getMeetingpointData;
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