Checks the Nescafe Dolce Gusto website to see if a certain product is in stock

coffeeinstock.php

<?

#
# Checks the Nescafe Dolce Gusto website to see if your pods are back in stock
# by Laurie Denness
#
#

# This program sends an email to THIS ADDRESS:
$email = "your.email@here.com";
# When your chosen coffee pod (specify on the command line) comes back into stock.
# e.g. php coffeeinstock.php 7613032349523_08

# Some colours
$red = "\033[31m";
$white = "\033[0m";
$yellow = "\033[1;33m";
$blue = "\033[34m";
$green = "\033[32m";

$productid = $argv[1];
if (!$productid) {
	logline("{$red}ERR: {$white}A product ID is required to check, get this from the URL from the DG website");
	logline("E.g.: php coffeeinstock.php 7613032349523_08");
	exit(2);
}

$url = "https://www.dolce-gusto.co.uk/EN/shop/Pages/flavours.aspx?productId={$productid}";
while (true) { 
# go into a loop. The program exits and sends an email when it's in stock, otherwise
# it tries and tries again.  

	if (false == ($html = file_get_contents($url))) {
	# this HTTP GET failed. 
		logline("{$red}ERR: {$white}This fetch failed. Retrying.");
	} else {
	# search to make sure the product actually exists
		if (strpos($html,"Error")) {
			logline("{$yellow}WARN: {$white}An error occured. Does that product exist?");
			break;
		}
	# search for "Out of Stock"
		if (stripos($html, "Out of Stock") === false) {
			logline("{$green}YAY: {$white}Product is in stock!");
			logline("{$blue}INFO: {$white}Sending email to {$email}");
			# send an email, rejoice, etc
			if (sendmail("Great news, your coffee pods product {$productid} are now in stock!", $email, "Your coffee pods are in stock!")) {
				logline("{$green}OK: {$white} Email sent! Goodbye.");
			} else {
				logline("{$red}ERR: {$white} Email sending failed.");
			}
			exit(0);
		} else {
			logline("{$yellow}WARN: {$white}Product is not in stock. Retrying.");
		}
	}


logline("{$blue}INFO: {$white}Sleeping 1800 seconds...");
sleep(1800);
}

function logline($message) {
	echo date(DATE_RFC822) . " " . $message . "\n";
}

function sendmail($message, $emailaddr, $subject) {
         $headers = "From: " . $email . "\r\n";
         $headers .= 'Reply-To: ' . $emailaddr ."\r\n";
         $headers .= "X-Mailer: PHPCoffeeScript\r\n";
         $headers .= 'MIME-Version: 1.0' . "\r\n"; 
	if (mail($emailaddr, $subject, $message, $headers)) {
		return true;	
	} else {
		return false;
	}
}

?>