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subscribe.php
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subscribe.php
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<?php
/**
* Gets user emails and subscription options
*
* @author Tatiana Braginets
* Random string f-n: http://stackoverflow.com/questions/853813/how-to-create-a-random-string-using-php
* Regex for email: http://www.regular-expressions.info/email.html
*/
header('content-type: text/html;charset=utf-8');
require_once 'connection.php';
$dbc = $GLOBALS['dbc'];
/**
* Creates random string of requested length
*@param int $length required length
*@param string $charset chars to choose from
*@return string random string
**/
function randString($length, $charset='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789')
{
$str = '';
$count = strlen($charset);
while ($length--) {
$str .= $charset[mt_rand(0, $count-1)];
}
return $str;
}
/**
* Gets list of sites from db
* @global $dbc databse connection
* @return string sites
*/
function getSites()
{
global $dbc;
$que="SELECT DISTINCT site FROM course_data";
$result = $dbc->query($que);
$ret = "";
if($result) {
while($row = $result->fetch_array()){
$site = "" . $row['site'];
$checked = "";
if (isset($_REQUEST['sites'])
&& (array_search($site, $_REQUEST['sites']) !== FALSE)) {
$checked = "checked";
}
$ret .= '<label><input name="sites[]" type="checkbox" value="'
. $site . '" '. $checked . '> ' . $site .'</label><br>';
}
}
return $ret;
}
/**
* Checks the form and returns errors
* @global $dbc databse connection
* @return string errors
*/
function getFormErrors() {
$errors = "";
global $dbc;
if (!isset($_REQUEST['email'])
|| !preg_match("/^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}$/",
$dbc->real_escape_string($_REQUEST['email']))) {
$errors .= '<p class="text-warning">Please enter a valid email</p>';
}
if (!isset($_REQUEST['sites'])) {
$errors .= '<p class="text-warning">At least one site must be checked</p>';
}
return $errors;
}
?>
<!DOCTYPE html>
<head>
<title>Kazoom - Email subscription</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="css/style.css" type="text/css">
<style type="text/css">
body {
padding-top: 10px;
padding-bottom: 10px;
}
.subscribe-holder {
max-width: 500px;
padding: 19px 29px 29px;
margin: 0 auto 20px;
border: 1px solid #e5e5e5;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
-webkit-box-shadow: 0 1px 2px rgba(0,0,0,.05);
-moz-box-shadow: 0 1px 2px rgba(0,0,0,.05);
box-shadow: 0 1px 2px rgba(0,0,0,.05);
background-color: #efefef;
box-shadow: 2px 3px 9px 2px rgba(0, 0, 0, 0.3);
}
</style>
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<h3 ><a class="muted" href="index.php">KaZoom</a></h3>
</div>
<hr class="gradientHr">
<div class="subscribe-holder">
<h4 class="subscribe-holder-heading">Subscribe to new course notifications</h4>
<p>We'll send you an email whenever we find new courses.</p>
<hr class="gradientHr">
<?php
$errors = '';
if (isset($_REQUEST['subscribe']) && ($errors = getFormErrors()) === "") {
$email = $dbc->real_escape_string($_REQUEST['email']);
//echo $email;
//$email = 'tbraginets@gmail.com';
$freq = $dbc->real_escape_string($_REQUEST['freq']);
$sites = array();
foreach($_REQUEST['sites'] as $site) {
$sites[] = $dbc->real_escape_string($site);
}
$site_options = implode(',', $sites);
//echo $site_options;
$subject = 'Confirm you subscription to Kazoom';
$headers = 'Reply-To: noreply@box334.bluehost.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
$que="SELECT email, verified, rand_key, max FROM subscription_emails WHERE 1 AND email='$email'";
$result = $dbc->query($que);
if($result && $result->num_rows) {
$row = $result->fetch_array();
$verified = $row['verified'];
if ($verified) {
echo "You are already subscribed to notifications.";
} else {
$max = $row['max'];
if ($max == 3) {
echo $email + " You have reached maximum number of confirmation emails sent.
Please, make sure you are entering a correct email address and check your spam folder,
or contact site administrator for assistance.";
} else {
$max++;
$que="UPDATE subscription_emails SET max='$max'
WHERE email = '$email'";
$dbc->query($que);
$key = $row['rand_key'];
$link = 'http://www.sjsu-cs.org/cs160/spring2013/sec1group1/verifyEmail.php?email='
. $email . '&key=' . $key;
$message = 'Please confirm you subscription to Kazoom updates by following the link: ' . "\r\n\n";
$message .= $link;
$message .= " \r\n\nIf you do not recognize this subscription, please disregard this email.";
mail($email, $subject, $message, $headers);
echo "You have already subscribed to notifications, but have not verified your email address.
A new confirmation email have been sent. Please, click confirmation link in it to
verify your email address.";
}
}
} else {
$key = randString(50);
$que ="INSERT INTO subscription_emails (email, rand_key, verified, frequency, date_added, sites, max)
VALUES ('$email', '$key', '0', '$freq', now(), '$site_options', '1');";
$dbc->query($que) or die($dbc->error);
$link = 'http://www.sjsu-cs.org/cs160/spring2013/sec1group1/verifyEmail.php?email='
. $email . '&key=' . $key;
$message = 'Please confirm you subscription to Kazoom updates by following the link: ' . "\r\n\n";
$message .= $link;
$message .= " \r\n\nIf you do not recognize this subscription, please disregard this email.";
mail($email, $subject, $message, $headers);
echo "Confirmation email has been sent. Please, click confirmation link in it to verify your email address.";
}
?>
</div>
<footer>
<hr class="gradientHr">
<p>© San Jose State University</p>
</footer>
</div>
</body>
</html>
<?php exit();
} else if (isset($_REQUEST['subscribe'])) {
echo $errors;
} ?>
<form class="form-horizontal" method="post" action="subscribe.php" onsubmit="return validateForm();">
<div class="control-group">
<label class="control-label" for="email">Email</label>
<div class="controls">
<input type="text" id="email" name="email" value="<?php echo @$_REQUEST['email'] ?>">
<p class="text-error" id="email_error"></p>
</div>
</div>
<div class="control-group">
<label class="control-label" for="sites">Site(s)</label>
<div class="controls">
<?php echo getSites(); ?>
<p class="text-error" id="sites_error"></p>
</div>
</div>
<div class="control-group">
<label class="control-label" for="freq">Frequency</label>
<div class="controls">
<select name="freq">
<option id="w" value="w"
<?php if(@$_REQUEST['freq'] === "w") echo "selected"; ?>>Weekly</option>
<option id="d" value="d"
<?php if(@$_REQUEST['freq'] === "d") echo "selected"; ?>>Daily</option>
</select>
</div>
</div>
<div class="controls">
<input class="btn btn-success" type="submit" name="subscribe" value="Subscribe">
</div>
</form>
</div>
<footer>
<hr class="gradientHr">
<p>© San Jose State University</p>
</footer>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
/**
* Validates form
* @returns {Boolean} true if form is valid, false otherwise
*/
function validateForm()
{
var success = true;
$('#email_error').html("");
$('#sites_error').html("");
var email = $('#email').val();
var reg = /^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}$/;
if (!email || !reg.test(email) ) {
$('#email_error').html("Please, enter a valid email");
success = false;
}
if (!countChecked()) {
$('#sites_error').html("At least one site must be checked");
success = false;
}
return success;
}
var countChecked = function() {
return $("input:checked").length;
};
</script>
</body>
</html>