<?php /** * Controller for ical output of users own shifts or any user_shifts filter. */ function user_ical() { global $user; if (!isset($_REQUEST['key']) || !preg_match('/^[0-9a-f]{32}$/', $_REQUEST['key'])) { engelsystem_error('Missing key.'); } $key = $_REQUEST['key']; $user = User_by_api_key($key); if ($user == null) { engelsystem_error('Key invalid.'); } if (!in_array('ical', privileges_for_user($user['UID']))) { engelsystem_error('No privilege for ical.'); } $ical_shifts = load_ical_shifts(); send_ical_from_shifts($ical_shifts); } /** * Renders an ical calender from given shifts array. * * @param array <Shift> $shifts */ function send_ical_from_shifts($shifts) { header('Content-Type: text/calendar; charset=utf-8'); $output = "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//-//Engelsystem//DE\r\nCALSCALE:GREGORIAN\r\n"; foreach ($shifts as $shift) { $output .= make_ical_entry_from_shift($shift); } $output .= "END:VCALENDAR\r\n"; $output = trim($output, "\x0A"); header('Content-Length: ' . strlen($output)); raw_output($output); } /** * Renders an ical vevent from given shift. * * @param array $shift * @return string */ function make_ical_entry_from_shift($shift) { $output = "BEGIN:VEVENT\r\n"; $output .= 'UID:' . md5($shift['start'] . $shift['end'] . $shift['name']) . "\r\n"; $output .= 'SUMMARY:' . str_replace("\n", "\\n", $shift['name']) . ' (' . str_replace("\n", "\\n", $shift['title']) . ")\r\n"; if (isset($shift['Comment'])) { $output .= 'DESCRIPTION:' . str_replace("\n", "\\n", $shift['Comment']) . "\r\n"; } $output .= 'DTSTART;TZID=Europe/Berlin:' . date("Ymd\THis", $shift['start']) . "\r\n"; $output .= 'DTEND;TZID=Europe/Berlin:' . date("Ymd\THis", $shift['end']) . "\r\n"; $output .= 'LOCATION:' . $shift['Name'] . "\r\n"; $output .= "END:VEVENT\r\n"; return $output; }