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<?php
require '/usr/src/aws.phar';

# Setup
$debug = false;

$key = getenv("NOTIFY_PARAMETER_1");
$secret = getenv("NOTIFY_PARAMETER_2");

if ($key == false || $secret == false) {
    echo "API key or secret are missing\n";
    exit(1);
}

$number = getenv("NOTIFY_CONTACTPAGER");

if ($number == false) {
    echo "Pager number is missing\n";
    exit(1);
}

# Variables exported by check_mk
$what = getenv('NOTIFY_WHAT');
$type = getenv('NOTIFY_NOTIFICATIONTYPE');
$toi  = getenv('NOTIFY_CONTACTPAGER');
$host = getenv('NOTIFY_HOSTALIAS');
$service = '';
$status = '';
$output = '';
$author = '';
$comment = '';

$message = '';

# Determine type of alert and build message
if ($type == 'ACKNOWLEDGEMENT') {
        if ($what == 'SERVICE') {
                $service = getenv('NOTIFY_SERVICEDESC');
                $author = getenv('NOTIFY_NOTIFICATIONAUTHOR');
                $comment = getenv('NOTIFY_NOTIFICATIONCOMMENT');
                $message = "$service on $host ack'd by $author: $comment";
        } else {
                $author = getenv('NOTIFY_NOTIFICATIONAUTHOR');
                $comment = getenv('NOTIFY_NOTIFICATIONCOMMENT');
                $message = "$host ack'd by $author: $comment";
        }
} else {
        if ($what == 'SERVICE') {
                $service = getenv('NOTIFY_SERVICEDESC');
                $status = getenv('NOTIFY_SERVICESTATE');
                $output = getenv('NOTIFY_SERVICEOUTPUT');
                $message = "$service on $host is $status: $output";
        } else {
                $status = getenv('NOTIFY_HOSTSTATE');
                $output = getenv('NOTIFY_HOSTOUTPUT');
                $message = "$host is $status: $output";
        }
}

# Send the message to SNS
$credentials = new Aws\Credentials\Credentials($key, $secret);

$sns = new Aws\Sns\SnsClient([
    'credentials' => $credentials,
    'version' => 'latest',
    'region'  => 'us-east-1'
]);

$result = $sns->publish([
    'Message' => substr($message, 0, 160),
    'PhoneNumber' => $number,
]);

if ($debug == true) {
    echo $result;
}