Simple nagios script to integrate flock.

flock_nagios.php

#!/usr/bin/php
<?php
/**
 * Example call in nagios xi:
 * /usr/local/bin/flock_nagios.php hostname="$HOSTNAME$" state="$HOSTSTATE$" message="$HOSTOUTPUT$" notificationType="$NOTIFICATIONTYPE$"
 */

$flockUrl = 'YOUR_FLOCK_URL';

$parameters = [];
$arguments = $argv;
unset($arguments[0]);

foreach ($arguments as $key => $argument) {
    $explodedArgument = explode('=', $argument);
    $parameters[$explodedArgument[0]] = $explodedArgument[1];
}

$message = strtoupper($parameters['notificationType']) . ' - ' . $parameters['hostname'] . ' - ' . $parameters['message'] . ' (' . $parameters['state'] . ')';

$jsonData = [
    'text' => $message
];

$jsonDataString = json_encode($jsonData);

$ch = curl_init($flockUrl);

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataString);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Content-Length: ' . strlen($jsonDataString)
]);

$result = curl_exec($ch);

curl_close($ch);

First you need to create a new WebHook in Flock. After this you just upload that file to your Nagios server and make sure its executable. You can simply test that by calling the script like this:

php flock_nagios.php hostname="TEST" state="TEST" message="TEST" notificationType="TEST"

Then you just need to add 2 commands in Nagios XI: Configure -> Core Config Manager -> Commands:

flock_host_notification_handler
/usr/local/bin/flock_nagios.php hostname="$HOSTNAME$" state="$HOSTSTATE$" message="$HOSTOUTPUT$" notificationType="$NOTIFICATIONTYPE$

flock_service_notification_handler
/usr/local/bin/flock_nagios.php hostname="$HOSTNAME$" state="$SERVICESTATE$" message="$SERVICEOUTPUT$" notificationType="$NOTIFICATIONTYPE$"