1 files changed, 85 insertions, 0 deletions
diff --git a/src/server/lib/getUserIndex.js b/src/server/lib/getUserIndex.js
new file mode 100644
index 0000000..db7daa8
--- /dev/null
+++ b/src/server/lib/getUserIndex.js
@@ -0,0 +1,85 @@
+'use strict'
+
+const Promise = require('bluebird')
+const cheerio = require('cheerio')
+const request = Promise.promisify(require('request'))
+
+let userIndex
+let lastUpdate
+
+function updateUserIndex () {
+  return new Promise(function (resolve, reject) {
+    process.stdout.write('Updating user index... ')
+    request(`http://www.meetingpointmco.nl/Roosters-AL/doc/dagroosters/frames/navbar.htm`)
+      .then(function (page) {
+        lastUpdate = new Date()
+        page = page.body
+
+        const $ = cheerio.load(page)
+        const $script = $('script').eq(1)
+        const scriptText = $script.text()
+
+        const regexs = [/var classes = \[(.+)];/, /var teachers = \[(.+)];/, /var rooms = \[(.+)];/, /var students = \[(.+)];/]
+        const items = regexs.map(function (regex) {
+          return scriptText.match(regex)[1].split(',').map(function (item) {
+            return item.replace(/"/g, '')
+          })
+        })
+
+        userIndex = ([]
+        .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
+          }
+        })))
+
+        process.stdout.write('done.\n')
+
+        resolve(userIndex)
+      })
+      .catch(error => {
+        process.stdout.write('failed.\n')
+        reject(error)
+      })
+  })
+}
+
+function getUserIndex () {
+  return new Promise((resolve, reject) => {
+    if (lastUpdate == null) {
+      updateUserIndex().then(resolve, reject)
+    } else if (new Date() - lastUpdate > 10 * 60 * 1000) { // 10 minutes
+      updateUserIndex().then(resolve, function () {
+        console.warn('Unable to update userIndex, using cached.')
+        resolve(userIndex)
+      })
+    } else {
+      resolve(userIndex)
+    }
+  })
+}
+
+module.exports = getUserIndex