watching openvpn announcment forum for changes and open the URL in your browser once there is a new post

main.go

package main

import (
	"os"
	"strconv"
	"time"

	"github.com/PuerkitoBio/goquery"
	"github.com/cryptix/go/logging"
	"github.com/pkg/browser"
)

var log = logging.Logger("openVPNcrit")

const (
	annCnt      = 16
	annForumUrl = "https://forums.openvpn.net/announcements-f20.html"
	secAnnUrl   = "https://forums.openvpn.net/topic17625.html"
)

func main() {
	lastR, lastV := 0, 0

	for {
		announcements := getAnnouncments()
		if announcements != annCnt {
			log.Noticef("# of Announcments changed!! %d", announcements)
			browser.OpenURL(annForumUrl)
			os.Exit(0)
		}

		r, v := getRepliesAndViews()
		if r > lastR {
			log.Noticef("# of Replies changed!! %d", r)
			browser.OpenURL(secAnnUrl)
			os.Exit(0)
		}
		lastR = r

		log.Noticef("# of Views: %d (diff %d)", v, v-lastV)
		lastV = v

		time.Sleep(1 * time.Minute)

	}
}

func getAnnouncments() int {
	doc, err := goquery.NewDocument(annForumUrl)
	logging.CheckFatal(err)

	return doc.Find("#pagecontent table.tablebg tbody").Children().Length()
}

func getRepliesAndViews() (int, int) {
	doc, err := goquery.NewDocument(annForumUrl)
	logging.CheckFatal(err)

	repItm := doc.Find("#pagecontent table.tablebg tbody tr:nth-child(3) td:nth-child(5)")
	replies, err := strconv.Atoi(repItm.Text())
	logging.CheckFatal(err)

	viewsItm := doc.Find("#pagecontent table.tablebg tbody tr:nth-child(3) td:nth-child(6)")
	views, err := strconv.Atoi(viewsItm.Text())
	logging.CheckFatal(err)

	return replies, views
}