bac-results/index.js

A daemon to email the user when the baccalaureate results are posted on the official website.

"use strict";

// Dependencies
var Request = require("request"),
    Mandrill = require("mandrill-api/mandrill"),
    Config = require("./config"),
    MandrillClient = new Mandrill.Mandrill(Config.mandrillKey),
    Http = require("http"),
    Url = require("url"),
    Cheerio = require("cheerio");

// The request url where the results are supposed to be posted
var REQ_URL = Config.reqUrl || "http://static.bacalaureat.edu.ro/2014/rapoarte/BH/index.html";

// This becomes `true` once the email is submitted.
var sent = false;

var oldHtml = null,
    newHtml = null;

/**
 * sendEmail
 * Sends the notification email
 *
 * @name sendEmail
 * @function
 */
function sendEmail() {
    sent = true;
    MandrillClient.messages.send({
        message: {
            from_email: Config.from.email,
            from_name: Config.from.name,
            to: [{
                email: Config.to.email,
                name: Config.to.name
            }],
            subject: Config.subject,
            text: Config.text + "\n\n" + REQ_URL
        }
    }, function (result) {
        console.log(result);
    }, function (error) {
        console.log(error);
    });
}

function checkUrl() {
    Request(REQ_URL, function (error, response, body) {
        if (!oldHtml) {
            oldHtml = newHtml = body;
            setTimeout(checkUrl, Config.timeout || 1000);
            return;
        }
        oldHtml = newHtml;
        newHtml = body;
        $1 = Cheerio.load(newHtml);
        $2 = Cheerio.load(newHtml);

        console.log($1("#ContentPlaceHolderBody_LabelTitle").text());

        if (newHtml !== oldHtml) {
            if ($1("#ContentPlaceHolderBody_LabelTitle").text() !== $2("#ContentPlaceHolderBody_LabelTitle")) {
                return sendEmail();
            }
        }
        setTimeout(checkUrl, Config.timeout || 1000);
    });
}

checkUrl();