Enhances event handling with timezone support

Adds timezone handling to the event parsing and formatting logic.

This allows events to be displayed in the user's local timezone, improving the user experience.

Also restructures the event display on the "Termine" page to include a sidebar for filtering by year and month.
This commit is contained in:
2025-09-06 12:27:56 +02:00
parent 94078a7e6f
commit 15de43a2b5
3 changed files with 339 additions and 174 deletions
+115 -39
View File
@@ -1,66 +1,142 @@
<?php
<?php
// URL der öffentlichen ICS-Datei
define(
'CAL_URL',
'https://calendar.google.com/calendar/ical/jv1bq94un3ivoa8ka0rk9ngq4k%40group.calendar.google.com/public/basic.ics',
'CAL_URL',
'https://calendar.google.com/calendar/ical/jv1bq94un3ivoa8ka0rk9ngq4k%40group.calendar.google.com/public/basic.ics',
);
function format_ics_date($date)
{
// Unterstützt sowohl ganztägige als auch Zeitangaben
if (strpos($date, 'T') !== false) {
// Unterstützt sowohl ganztägige als auch Zeitangaben
if (strpos($date, 'T') !== false) {
$dt = DateTime::createFromFormat('Ymd\THis', substr($date, 0, 15));
return $dt ? $dt->format('d.m.Y H:i') : $date;
} else {
$dt = DateTime::createFromFormat('Ymd', $date);
return $dt ? $dt->format('d.m.Y') : $date;
}
}
function format_ics_date_with_timezone($date, $timezone = null)
{
// Unterstützt sowohl ganztägige als auch Zeitangaben
if (strpos($date, 'T') !== false) {
$dt = null;
// Prüfe ob es eine UTC-Zeit ist (endet mit Z)
if (substr($date, -1) === 'Z') {
// UTC-Zeit: 20250405T130000Z
$utc_date = substr($date, 0, -1); // Entferne das Z
$dt = DateTime::createFromFormat('Ymd\THis', $utc_date, new DateTimeZone('UTC'));
} elseif ($timezone) {
// Zeitzone angegeben: 20250405T130000 mit TZID
try {
$dt = new DateTime($date, new DateTimeZone($timezone));
} catch (Exception $e) {
// Fallback auf lokale Zeit
$dt = DateTime::createFromFormat('Ymd\THis', substr($date, 0, 15));
return $dt ? $dt->format('d.m.Y H:i') : $date;
}
} else {
$dt = DateTime::createFromFormat('Ymd', $date);
return $dt ? $dt->format('d.m.Y') : $date;
// Lokale Zeit ohne Zeitzone
$dt = DateTime::createFromFormat('Ymd\THis', substr($date, 0, 15));
}
if ($dt) {
// ISO 8601 Format für JavaScript
$iso_date = $dt->format('Y-m-d\TH:i:sP'); // P = Zeitzone
$display_date = $dt->format('d.m.Y H:i');
return [
'iso' => $iso_date,
'display' => $display_date,
'has_time' => true,
];
}
return [
'iso' => $date,
'display' => $date,
'has_time' => true,
];
} else {
$dt = DateTime::createFromFormat('Ymd', $date);
if ($dt) {
$iso_date = $dt->format('Y-m-d');
$display_date = $dt->format('d.m.Y');
return [
'iso' => $iso_date,
'display' => $display_date,
'has_time' => false,
];
}
return [
'iso' => $date,
'display' => $date,
'has_time' => false,
];
}
}
// ICS-Datei laden
$ics = @file_get_contents(CAL_URL);
if (! $ics) {
echo '<div class="text-red-600">Kalender konnte nicht geladen werden.</div>';
if (!$ics) {
echo '<div class="text-red-600">Kalender konnte nicht geladen werden.</div>';
return;
return;
}
// Termine parsen
function parse_ics($ics)
{
$lines = explode("\n", $ics);
$events = [];
$event = [];
$inEvent = false;
foreach ($lines as $line) {
$line = trim($line);
if ($line === 'BEGIN:VEVENT') {
$inEvent = true;
$event = [];
} elseif ($line === 'END:VEVENT') {
$inEvent = false;
$events[] = $event;
} elseif ($inEvent) {
// Property kann Parameter enthalten, z.B. DTSTART;TZID=Europe/Berlin:20240701T19000000
$parts = explode(':', $line, 2);
if (count($parts) === 2) {
$key = $parts[0];
$val = $parts[1];
// Nur den eigentlichen Property-Namen extrahieren
$key = strtoupper(preg_replace('/;.+$/', '', $key));
$event[$key] = $val;
}
}
}
$lines = explode("\n", $ics);
$events = [];
$event = [];
$inEvent = false;
foreach ($lines as $line) {
$line = trim($line);
if ($line === 'BEGIN:VEVENT') {
$inEvent = true;
$event = [];
} elseif ($line === 'END:VEVENT') {
$inEvent = false;
$events[] = $event;
} elseif ($inEvent) {
// Property kann Parameter enthalten, z.B. DTSTART;TZID=Europe/Berlin:20240701T19000000
$parts = explode(':', $line, 2);
if (count($parts) === 2) {
$key = $parts[0];
$val = $parts[1];
return $events;
// Zeitzoneninformation extrahieren
$timezone = null;
if (preg_match('/TZID=([^:;]+)/', $key, $matches)) {
$timezone = $matches[1];
}
// Nur den eigentlichen Property-Namen extrahieren
$cleanKey = strtoupper(preg_replace('/;.+$/', '', $key));
$event[$cleanKey] = $val;
// Zeitzoneninformation separat speichern
if ($timezone && in_array($cleanKey, ['DTSTART', 'DTEND'])) {
$event[$cleanKey . '_TZID'] = $timezone;
}
}
}
}
return $events;
}
$events = parse_ics($ics);
return function () use ($events) {
return $events;
return $events;
};