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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* The event handler.
*
* @package local_webhooks
* @copyright 2017 "Valentin Popov" <info@valentineus.link>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_webhooks;
defined("MOODLE_INTERNAL") || die();
require_once($CFG->libdir . "/filelib.php");
/**
* Defines how to work with events.
*
* @copyright 2017 "Valentin Popov" <info@valentineus.link>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class handler {
/**
* External handler.
*
* @param object $event
*/
public static function events($event) {
$data = $event->get_data();
self::transmitter($data);
}
/**
* Transmitter, processing event and services.
*
* @param array $data
*/
private static function transmitter($data) {
global $DB;
$callbacks = $DB->get_recordset("local_webhooks_service");
if ($callbacks->valid()) {
foreach ($callbacks as $callback) {
self::handler_callback($data, $callback);
}
}
$callbacks->close();
}
/**
* Processes each callback.
*
* @param array $data
* @param object $callback
*/
private static function handler_callback($data, $callback) {
if (boolval($callback->enable)) {
$events = array();
if (!empty($callback->events)) {
$events = unserialize(gzuncompress(base64_decode($callback->events)));
}
if (!empty($events[$data["eventname"]])) {
if (!empty($callback->token)) {
$data["token"] = $callback->token;
}
if (!empty($callback->other)) {
$data["extra"] = $callback->other;
}
self::send($data, $callback);
}
}
}
/**
* Sending data to the node.
*
* @param array $data
* @param object $callback
*/
private static function send($data, $callback) {
$curl = new \curl();
$curl->setHeader(array("Content-Type: application/$callback->type"));
$curl->post($callback->url, json_encode($data));
$response = $curl->getResponse();
self::logger($callback, $response);
return $response;
}
/**
* Event logging.
*
* @param array $response
* @param object $callback
*/
private static function logger($callback, $response) {
$status = "Error sending request";
if (!empty($response["HTTP/1.1"])) {
$status = $response["HTTP/1.1"];
}
$event = \local_webhooks\event\response_get::create(
array(
"context" => \context_system::instance(0),
"objectid" => $callback->id,
"other" => array(
"status" => $status
)
)
);
$event->trigger();
}
}
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