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|
<?php
class CourseBackend_Davinci extends CourseBackend
{
private $location;
private $verifyHostname = true;
private $verifyCert = true;
/**
* @var bool|resource
*/
private $curlHandle = false;
public function setCredentialsInternal($data)
{
if (empty($data['baseUrl'])) {
$this->addError("No url is given", true);
return false;
}
$location = preg_replace('#/+(davinciis\.dll)?\W*$#i', '', $data['baseUrl']);
$this->location = $location . "/DAVINCIIS.dll?";
$this->verifyHostname = $data['verifyHostname'];
$this->verifyCert = $data['verifyCert'];
return true;
}
public function checkConnection()
{
if (empty($this->location)) {
$this->addError("Credentials are not set", true);
return false;
}
$startDate = new DateTime('today 0:00');
$endDate = new DateTime('+7 days 0:00');
$data = $this->fetchRoomRaw('someroomid123', $startDate, $endDate);
if ($data !== false && strpos($data, 'DAVINCI SERVER') === false) {
$this->addError("Unknown reply; this doesn't seem to be a DAVINCI server.", true);
return false;
}
return true;
}
public function getCredentialDefinitions()
{
return [
new BackendProperty('baseUrl', 'string'),
new BackendProperty('verifyCert', 'bool', true),
new BackendProperty('verifyHostname', 'bool', true)
];
}
public function getDisplayName()
{
return 'Davinci';
}
public function getCacheTime()
{
return 30 * 60;
}
public function getRefreshTime()
{
return 0;
}
/**
* @param string $roomId unique name of the room, as used by davinci
* @param \DateTime $startDate start date to fetch
* @param \DateTime $endDate end date of range to fetch
* @return array|bool if successful the arrayrepresentation of the timetable
*/
private function fetchRoomRaw($roomId, $startDate, $endDate)
{
$url = $this->location . "content=xml&type=room&name=" . urlencode($roomId)
. "&startdate=" . $startDate->format('d.m.Y') . "&enddate=" . $endDate->format('d.m.Y');
if ($this->curlHandle === false) {
$this->curlHandle = curl_init();
}
$options = array(
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_SSL_VERIFYHOST => $this->verifyHostname ? 2 : 0,
CURLOPT_SSL_VERIFYPEER => $this->verifyCert ? 1 : 0,
CURLOPT_URL => $url,
CURLOPT_TIMEOUT => 15,
CURLOPT_CONNECTTIMEOUT => 3,
);
curl_setopt_array($this->curlHandle, $options);
$output = curl_exec($this->curlHandle);
if ($output === false) {
$this->addError('Curl error: ' . curl_error($this->curlHandle), true);
return false;
}
return $output;
}
public function fetchSchedulesInternal($requestedRoomIds)
{
$startDate = new DateTime('last Monday 0:00');
$endDate = new DateTime('+14 days 0:00');
$lower = (int)$startDate->format('Ymd');
$upper = (int)$endDate->format('Ymd');
$schedules = [];
foreach ($requestedRoomIds as $roomId) {
$return = $this->fetchRoomRaw($roomId, $startDate, $endDate);
if ($return === false) {
continue;
}
$return = $this->xmlStringToArray($return, $err);
if ($return === false) {
$this->addError("Parsing room $roomId XML: $err", false);
continue;
}
$lessons = $this->getArrayPath($return, '/Lessons/Lesson');
if ($lessons === false) {
$this->addError("Cannot find /Lessons/Lesson in XML", false);
continue;
}
$timetable = [];
foreach ($lessons as $lesson) {
if (!isset($lesson['Date']) || !isset($lesson['Start']) || !isset($lesson['Finish'])) {
$this->addError('Lesson is missing Date, Start or Finish', false);
continue;
}
$c = (int)$lesson['Date'];
if ($c < $lower || $c > $upper)
continue;
$date = $lesson['Date'];
$date = substr($date, 0, 4) . '-' . substr($date, 4, 2) . '-' . substr($date, 6, 2);
$start = $lesson['Start'];
$start = substr($start, 0, 2) . ':' . substr($start, 2, 2);
$end = $lesson['Finish'];
$end = substr($end, 0, 2) . ':' . substr($end, 2, 2);
$subject = isset($lesson['Subject']) ? $lesson['Subject'] : '???';
$timetable[] = array(
'title' => $subject,
'start' => $date . "T" . $start . ':00',
'end' => $date . "T" . $end . ':00'
);
}
$schedules[$roomId] = $timetable;
}
return $schedules;
}
public function __destruct()
{
if ($this->curlHandle !== false) {
curl_close($this->curlHandle);
}
}
}
|
