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83 lines
2.4 KiB
PHP
83 lines
2.4 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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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 === false) {
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engelsystem_error("Unable to find user.");
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}
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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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$ical_shifts = load_ical_shifts();
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send_ical_from_shifts($ical_shifts);
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}
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/**
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* Returns shifts to export.
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* Users shifts or user_shifts filter based shifts if export=user_shifts is given as param.
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*/
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function load_ical_shifts() {
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global $user, $ical_shifts;
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if (isset($_REQUEST['export']) && $_REQUEST['export'] == 'user_shifts') {
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require_once realpath(__DIR__ . '/user_shifts.php');
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view_user_shifts();
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return $ical_shifts;
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}
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return Shifts_by_user($user);
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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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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 Shift $shift
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*/
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function make_ical_entry_from_shift($shift) {
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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']) . " (" . 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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?>
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