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