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authorNoah Loomans <noahloomans@gmail.com>2017-09-05 20:28:32 +0200
committerNoah Loomans <noahloomans@gmail.com>2017-09-05 20:28:32 +0200
commit600128bda0390f2051ad20ee42930f036c79323c (patch)
treed8af17fd1f30dc4b11f44763c3addba104636f40 /lib/getMeetingpointData.js
parente3947f0d11864f40a2c0a202af99e0b14ff14dcf (diff)
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diff --git a/lib/getMeetingpointData.js b/lib/getMeetingpointData.js
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+'use strict'
+
+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(function (regex) {
+ return script.match(regex)[1].split(',').map(function (item) {
+ return item.replace(/"/g, '')
+ })
+ })
+
+ return []
+ .concat(items[0].map(function (item, index) {
+ return {
+ type: 'c',
+ value: item,
+ index: index
+ }
+ }))
+ .concat(items[1].map(function (item, index) {
+ return {
+ type: 't',
+ value: item,
+ index: index
+ }
+ }))
+ .concat(items[2].map(function (item, index) {
+ return {
+ type: 'r',
+ value: item,
+ index: index
+ }
+ }))
+ .concat(items[3].map(function (item, index) {
+ return {
+ type: 's',
+ value: item,
+ index: index
+ }
+ }))
+}
+
+function getValidWeekNumbers(page) {
+ const weekSelector = page('select[name="week"]');
+ const weekNumbers = _.map(weekSelector.children(), option => parseInt(option.attribs.value))
+
+ return weekNumbers;
+}
+
+function requestData() {
+ lastUpdate = new Date()
+
+ return request(`http://www.meetingpointmco.nl/Roosters-AL/doc/dagroosters/frames/navbar.htm`).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) {
+ return requestData()
+ } else if (!meetingpointData) {
+ // The first request hasn't resolved yet, throw an error.
+ return Promise.reject()
+ } else if (new Date() - lastUpdate > 10 * 60 * 1000) { // 10 minutes
+ return requestData().catch(function () {
+ console.warn('Unable to update userIndex, using cached.')
+
+ return meetingpointData
+ })
+ }
+ else {
+ return Promise.resolve(meetingpointData)
+ }
+}
+
+module.exports = getMeetingpointData