1 files changed, 142 insertions, 0 deletions
diff --git a/modules-available/locationinfo/inc/coursebackend/coursebackend_davinci.inc.php b/modules-available/locationinfo/inc/coursebackend/coursebackend_davinci.inc.php
new file mode 100644
index 00000000..fac3f296
--- /dev/null
+++ b/modules-available/locationinfo/inc/coursebackend/coursebackend_davinci.inc.php
@@ -0,0 +1,142 @@
+<?php
+
+class CourseBackend_Davinci extends CourseBackend
+{
+
+	private $location;
+	private $verifyHostname = true;
+	private $verifyCert = true;
+
+	public function setCredentialsInternal($data)
+	{
+		if (empty($data['baseUrl'])) {
+			$this->error = "No url is given";
+			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->error = "Credentials are not set";
+		} else {
+			$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->error = "Unknown reply; this doesn't seem to be a DAVINCI server.";
+			}
+		}
+		return $this->error === false;
+	}
+
+	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');
+		$ch = 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 => $url,
+		);
+
+		curl_setopt_array($ch, $options);
+		$output = curl_exec($ch);
+		if ($output === false) {
+			$this->error = 'Curl error: ' . curl_error($ch);
+			return false;
+		} else {
+			$this->error = false;
+			///Operation completed successfully
+		}
+		curl_close($ch);
+		return $output;
+
+	}
+
+	public function fetchSchedulesInternal($requestedRoomIds)
+	{
+		$startDate = new DateTime('today 0:00');
+		$endDate = new DateTime('+7 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);
+			if ($return === false) {
+				continue;
+			}
+			$lessons = $this->getArrayPath($return, '/Lessons/Lesson');
+			if ($lessons === false) {
+				$this->error = "Cannot find /Lessons/Lesson in XML";
+				continue;
+			}
+			$timetable = [];
+			foreach ($lessons as $lesson) {
+				if (!isset($lesson['Date']) || !isset($lesson['Start']) || !isset($lesson['Finish'])) {
+					$this->error = 'Lesson is missing Date, Start or Finish';
+					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;
+	}
+}