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<?php
// Öffentlich zugängliche Funktion zum Abrufen von iCal-Exports der eigenen Schichten
function user_ical() {
global $ical_shifts, $user;
if (isset ($_REQUEST['key']) && preg_match("/^[0-9a-f]{32}$/", $_REQUEST['key']))
$key = $_REQUEST['key'];
else
die("Missing key.");
$user = User_by_api_key($key);
if($user === false)
die("Unable to find user.");
if($user == null)
die("Key invalid.");
if(!in_array('ical', privileges_for_user($user['UID'])))
die("No privilege for ical.");
if (isset ($_REQUEST['export']) && $_REQUEST['export'] == 'user_shifts') {
require_once realpath(__DIR__ . '/user_shifts.php');
view_user_shifts();
} else {
$ical_shifts = sql_select("SELECT `Shifts`.*, `Room`.`Name` as `room_name` FROM `ShiftEntry` INNER JOIN `Shifts` ON (`ShiftEntry`.`SID` = `Shifts`.`SID`) INNER JOIN `Room` ON (`Shifts`.`RID` = `Room`.`RID`) WHERE `UID`=" . sql_escape($user['UID']) . " ORDER BY `start`");
}
header("Content-Type: text/calendar; charset=utf-8");
$html = "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//-//Engelsystem//DE\r\nCALSCALE:GREGORIAN\r\n";
foreach ($ical_shifts as $shift) {
$html .= "BEGIN:VEVENT\r\n";
$html .= "UID:" . md5($shift['start'] . $shift['end'] . $shift['name']) . "\r\n";
$html .= "SUMMARY:" . str_replace("\n", "\\n", $shift['name']) . "\r\n";
if(isset($shift['Comment']))
$html .= "DESCRIPTION:" . str_replace("\n", "\\n", $shift['Comment']) . "\r\n";
$html .= "DTSTART;TZID=Europe/Berlin:" . date("Ymd\THis", $shift['start']) . "\r\n";
$html .= "DTEND;TZID=Europe/Berlin:" . date("Ymd\THis", $shift['end']) . "\r\n";
$html .= "LOCATION:" . $shift['room_name'] . "\r\n";
$html .= "END:VEVENT\r\n";
}
$html .= "END:VCALENDAR\r\n";
$html = trim($html, "\x0A");
header("Content-Length: " . strlen($html));
echo $html;
die();
}
?>
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