Check ISP website & send mail if services are down

Scrape, navigate and print ISP's status page for a given address. This
only works with telenor and the URL must be a search for a given
address.
If any services are found to be down a mail is sent from and to accounts
set in config.js.

src/index.js

@@ -0,0 +1,128 @@
+// custom-header-footer.js
+
+// const common = require('./common')
+const puppeteer = require('puppeteer')
+const config = require('../config')
+const Mail = require( './mail.js');
+const mail = new Mail();
+
+let browser = undefined;
+if (config.debug == false)
+  console.log = () => {}
+
+const savePageToPDF = page => {
+  const pdfOptions = {
+    path: `telenor-downtime.pdf`,
+    format: "A4",
+    printBackground: true,
+    displayHeaderFooter: true,
+    headerTemplate: `<div style="font-size:11px;white-space:nowrap;margin-left:38px;">
+                        ${new Date().toLocaleString('nb-NO')}
+                        <span style="margin-left: 10px;">
+                          ${ config.url }
+                        </span>
+                    </div>`,
+    footerTemplate: `<div style="font-size:7px;white-space:nowrap;margin-left:38px;width:100%;">
+                        Generated PDF
+                        <span style="display:inline-block;float:right;margin-right:10px;">
+                            <span class="pageNumber"></span> / <span class="totalPages"></span>
+                        </span>
+                    </div>`,
+    margin: {
+      top: '38px',
+      right: '38px',
+      bottom: '38px',
+      left: '38px'
+    }
+  }
+
+  console.log('Saving page content to pdf.')
+  return page.setViewport({ width: 1920, height: 1080 })
+    .then(() => page.pdf(pdfOptions))
+    .then(() => Promise.resolve(page))
+ }
+
+const exitWithError = (err, message=undefined) => {
+  if (message)
+    console.error(message);
+  else
+    console.error('Unexpected error occured')
+
+  if (config.debug === true)
+    console.error(err)
+
+  closeBrowser();
+  process.exit(1);
+}
+
+const dismissCookiePrompt = page => {
+  console.log("Dismissing cookie consent prompt")
+
+  return page.$('a#consent_prompt_submit')
+    .catch(err => exitWithError(err, 'Could not find cookie consent prompt on page'))
+    .then(consentLink => {
+      if (consentLink == null)
+        page.evaluate(() => document.body.innerHTML)
+      else
+        consentLink.evaluate(link => link.click())
+
+      return page
+    })
+}
+
+const getServiceMessages = page => {
+  const statusTextOkTemplate = 'Vi fant ingen registrerte feil'
+ 
+  return page.evaluate((statusTextTemplate) => {
+    const messages = [];
+    document.querySelectorAll(".service-message-wrapper").forEach(serviceMessage => {
+      messages.push({
+        iconStatus: serviceMessage.classList.contains('color-ok'),
+        statusText: serviceMessage.getElementsByClassName('short-info')[0].innerText,
+        isOk: serviceMessage.innerText.includes(statusTextTemplate)
+      })
+    })
+
+    return messages
+  }, statusTextOkTemplate)
+};
+
+const notifyIfDown = serviceMessages => {
+  const servicesDown = serviceMessages.filter(message => message.isOk == false)
+
+  if (servicesDown.length) {
+    console.log("Following services are down:\n", servicesDown)
+
+    mail.sendAttachment('./telenor-downtime.pdf')
+      .then(resp => console.log(`Message id: ${resp.messageId} sent.\nResponse content: ${resp}`))
+  } else {
+    console.info("All service operational");
+  }
+}
+
+const webscraper = async pageURL => {
+  browser = await puppeteer.launch({ headless: true })
+  const page = await browser.newPage()
+
+  console.log(`Opening page with url: ${pageURL}`)
+  return page.goto(pageURL)
+    .then(() => Promise.resolve(page))
+    .catch(err => exitWithError(err, `Unable to reach url: ${pageURL}`))
+}
+
+function closeBrowser() {
+  browser.close();
+}
+
+
+function run() {
+  webscraper(config.url)
+    .then(page => dismissCookiePrompt(page))
+    .then(page => savePageToPDF(page))
+    .then(page => getServiceMessages(page))
+    .then(serviceMessages => notifyIfDown(serviceMessages))
+    .then(closeBrowser)
+}
+
+run();
+

src/mail.js

@@ -0,0 +1,40 @@
+const nodemailer = require( 'nodemailer')
+const config = require('../config.js')
+
+class Mail {
+  constructor(sender=undefined, password=undefined, recipient=undefined) {
+    this.sender = sender || config.senderEmail;
+    this.password = password || config.senderPassword;
+    this.recipient = recipient || config.recipientEmail;
+    this.transporter = this.setupTransporter();
+  }
+
+  setupTransporter() {
+    return nodemailer.createTransport({
+      service: 'gmail',
+      auth: {
+        user: this.sender,
+        pass: this.password
+      }
+    })
+  }
+
+  sendMail = message => this.transporter.sendMail(message);
+
+  sendAttachment = fileRef => {
+    const message = {
+      from: `"Fred Foo 👻" <${this.sender}>`,
+      to: this.recipient,
+      subject: 'Telenor nedetid',
+      text: "hello wordl",
+      html: "<p>hello wordl</p>",
+      attachments: [{
+        path: fileRef 
+      }]
+    }
+
+    return this.sendMail(message) 
+  }
+}
+
+module.exports = Mail