MrBlake
71df09a261
Runtime-Daten aus Git entfernen, WebP-Konvertierung ergänzen, Installation und Updates dokumentieren sowie den Repository-Link im Footer hinzufügen.
447 lines
15 KiB
PHP
447 lines
15 KiB
PHP
<?php
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// functions.php
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declare(strict_types=1);
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require_once __DIR__ . '/config.php';
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function ensure_storage(): void {
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if (!is_dir(dirname(DATA_FILE))) {
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@mkdir(dirname(DATA_FILE), 0775, true);
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}
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if (!is_file(DATA_FILE)) {
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file_put_contents(DATA_FILE, json_encode(['events' => []], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
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}
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if (!is_dir(UPLOAD_DIR)) {
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@mkdir(UPLOAD_DIR, 0775, true);
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}
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}
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function load_events(): array {
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ensure_storage();
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$raw = file_get_contents(DATA_FILE);
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$data = json_decode($raw ?: '{"events":[]}', true);
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return is_array($data) && isset($data['events']) ? $data['events'] : [];
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}
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function save_events(array $events): void {
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ensure_storage();
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$fp = fopen(DATA_FILE, 'c+');
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if ($fp === false) {
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throw new RuntimeException('Kann Datei nicht öffnen: ' . DATA_FILE);
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}
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flock($fp, LOCK_EX);
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ftruncate($fp, 0);
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fwrite($fp, json_encode(['events' => array_values($events)], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));
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fflush($fp);
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flock($fp, LOCK_UN);
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fclose($fp);
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}
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function by_datetime_asc(array $a, array $b): int {
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return strtotime($a['date'].' '.$a['time']) <=> strtotime($b['date'].' '.$b['time']);
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}
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function by_datetime_desc(array $a, array $b): int {
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return strtotime($b['date'].' '.$b['time']) <=> strtotime($a['date'].' '.$a['time']);
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}
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function now_iso(): string {
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return date('Y-m-d\TH:i:sP');
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}
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function make_slug(string $title, string $date): string {
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$t = mb_strtolower($title, 'UTF-8');
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$t = preg_replace('~[^\pL\d]+~u', '-', $t);
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$t = trim($t, '-');
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$t = preg_replace('~[^-\w]+~', '', $t);
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$t = preg_replace('~-+~', '-', $t);
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return $t . '-' . $date;
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}
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function event_path(array $event): string {
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if (!empty($event['slug'])) {
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return '/event.php?slug=' . rawurlencode($event['slug']);
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}
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if (!empty($event['id'])) {
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return '/event.php?id=' . rawurlencode($event['id']);
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}
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return '/event.php';
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}
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function event_url(array $event): string {
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return rtrim(BASE_URL, '/') . event_path($event);
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}
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function sanitize_text(string $s): string {
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return trim($s);
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}
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function is_upcoming(array $event): bool {
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$ts = strtotime($event['date'].' '.$event['time']);
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return $ts >= time();
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}
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function handle_image_upload(?array $file): ?string {
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if (!$file || ($file['error'] ?? UPLOAD_ERR_NO_FILE) === UPLOAD_ERR_NO_FILE) {
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return null;
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}
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if ($file['error'] !== UPLOAD_ERR_OK) {
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throw new RuntimeException('Upload-Fehler (Code '.$file['error'].')');
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}
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$sourcePath = (string)($file['tmp_name'] ?? '');
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if ($sourcePath === '' || !is_file($sourcePath)) {
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throw new RuntimeException('Die hochgeladene Bilddatei fehlt.');
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}
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$allowed = ['image/jpeg', 'image/png', 'image/webp'];
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$finfo = finfo_open(FILEINFO_MIME_TYPE);
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if ($finfo === false) {
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throw new RuntimeException('Der Dateityp konnte nicht geprüft werden.');
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}
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$mime = finfo_file($finfo, $sourcePath);
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finfo_close($finfo);
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if (!is_string($mime) || !in_array($mime, $allowed, true)) {
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throw new RuntimeException('Nur JPG/PNG/WEBP erlaubt.');
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}
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if (@getimagesize($sourcePath) === false) {
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throw new RuntimeException('Die hochgeladene Datei ist kein gültiges Bild.');
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}
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ensure_storage();
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$uploadToken = 'event_'.date('Ymd_His').'_' . bin2hex(random_bytes(4));
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$basename = $uploadToken . '.webp';
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$uploadDir = rtrim(UPLOAD_DIR, '/\\');
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$stagedSource = $uploadDir . '/.' . $uploadToken . '.upload';
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$stagedWebp = $uploadDir . '/.' . $uploadToken . '.webp.tmp';
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$destination = $uploadDir . '/' . $basename;
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if (!move_uploaded_file($sourcePath, $stagedSource)) {
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throw new RuntimeException('Konnte Datei nicht speichern.');
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}
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try {
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convert_image_to_webp($stagedSource, $mime, $stagedWebp, WEBP_QUALITY);
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$webpSize = is_file($stagedWebp) ? filesize($stagedWebp) : false;
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if ($webpSize === false || $webpSize === 0) {
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throw new RuntimeException('Die WebP-Datei konnte nicht erstellt werden.');
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}
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if (!@rename($stagedWebp, $destination)) {
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throw new RuntimeException('Die WebP-Datei konnte nicht gespeichert werden.');
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}
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} finally {
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if (is_file($stagedSource)) {
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@unlink($stagedSource);
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}
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if (is_file($stagedWebp)) {
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@unlink($stagedWebp);
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}
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}
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return '/uploads/'.$basename; // Pfad relativ zur Webroot
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}
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/**
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* Konvertiert ein geprüftes JPG-, PNG- oder WebP-Bild in eine WebP-Datei.
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* Unterstützt GD mit WebP-Support sowie Imagick als Alternative.
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*/
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function convert_image_to_webp(string $source, string $mime, string $destination, int $quality = 85): void {
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$quality = max(0, min(100, $quality));
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$gdLoaders = [
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'image/jpeg' => 'imagecreatefromjpeg',
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'image/png' => 'imagecreatefrompng',
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'image/webp' => 'imagecreatefromwebp',
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];
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$gdLoader = $gdLoaders[$mime] ?? null;
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if ($gdLoader !== null && function_exists($gdLoader) && function_exists('imagewebp')) {
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convert_image_to_webp_with_gd($source, $mime, $destination, $quality, $gdLoader);
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return;
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}
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if (class_exists('Imagick')) {
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convert_image_to_webp_with_imagick($source, $destination, $quality);
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return;
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}
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throw new RuntimeException(
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'WebP-Konvertierung ist auf dem Server nicht verfügbar. Bitte PHP-GD mit WebP-Support oder Imagick aktivieren.'
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);
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}
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function convert_image_to_webp_with_gd(
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string $source,
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string $mime,
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string $destination,
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int $quality,
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string $loader
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): void {
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$image = @$loader($source);
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if ($image === false) {
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throw new RuntimeException('Das Bild konnte nicht gelesen werden.');
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}
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try {
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if ($mime === 'image/jpeg') {
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$image = apply_jpeg_exif_orientation($image, $source);
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}
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if (function_exists('imagepalettetotruecolor')
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&& function_exists('imageistruecolor')
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&& !imageistruecolor($image)
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) {
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imagepalettetotruecolor($image);
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}
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imagealphablending($image, true);
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imagesavealpha($image, true);
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if (!@imagewebp($image, $destination, $quality)) {
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throw new RuntimeException('Das Bild konnte nicht als WebP gespeichert werden.');
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}
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} finally {
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imagedestroy($image);
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}
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}
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function apply_jpeg_exif_orientation($image, string $source) {
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if (!function_exists('exif_read_data')) {
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return $image;
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}
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$exif = @exif_read_data($source, 'IFD0', true);
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$orientation = (int)($exif['IFD0']['Orientation'] ?? $exif['Orientation'] ?? 1);
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if (in_array($orientation, [2, 4, 5, 7], true)) {
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$flipMode = in_array($orientation, [2, 5, 7], true) ? IMG_FLIP_HORIZONTAL : IMG_FLIP_VERTICAL;
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if (!imageflip($image, $flipMode)) {
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throw new RuntimeException('Die Bildausrichtung konnte nicht korrigiert werden.');
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}
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}
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$angle = 0;
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if ($orientation === 3) {
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$angle = 180;
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} elseif (in_array($orientation, [5, 6], true)) {
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$angle = -90;
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} elseif (in_array($orientation, [7, 8], true)) {
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$angle = 90;
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}
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if ($angle === 0) {
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return $image;
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}
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$transparent = imagecolorallocatealpha($image, 0, 0, 0, 127);
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$rotated = imagerotate($image, $angle, $transparent);
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if ($rotated === false) {
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throw new RuntimeException('Die Bildausrichtung konnte nicht korrigiert werden.');
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}
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imagesavealpha($rotated, true);
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imagedestroy($image);
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return $rotated;
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}
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function convert_image_to_webp_with_imagick(
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string $source,
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string $destination,
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int $quality
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): void {
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$sourceImage = new Imagick();
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$image = null;
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try {
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$sourceImage->readImage($source);
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$sourceImage->setIteratorIndex(0);
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$image = $sourceImage->getImage();
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if (method_exists($image, 'autoOrientImage')) {
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$image->autoOrientImage();
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}
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$image->setImageFormat('webp');
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$image->setImageCompressionQuality($quality);
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$image->stripImage();
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if (!$image->writeImage($destination)) {
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throw new RuntimeException('Das Bild konnte nicht als WebP gespeichert werden.');
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}
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} catch (Throwable $exception) {
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if ($exception instanceof RuntimeException) {
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throw $exception;
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}
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throw new RuntimeException('Das Bild konnte nicht in WebP konvertiert werden.', 0, $exception);
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} finally {
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if ($image instanceof Imagick) {
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$image->clear();
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$image->destroy();
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}
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$sourceImage->clear();
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$sourceImage->destroy();
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}
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}
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function render_event_jsonld_graph(array $events): string {
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$graph = [];
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foreach ($events as $e) {
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$startTime = $e['time'] ?? '19:30';
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$start = $e['date'] . 'T' . $startTime . ':00+02:00'; // Berlin Zeit im Sommer; vereinfacht
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$price = $e['price'] ?? '';
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$priceValue = normalize_price_value($price);
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$validFrom = $e['created_at'] ?? $e['updated_at'] ?? null;
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$endDate = build_event_end_date($e, $startTime);
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$offers = $price !== '' ? array_filter([
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"@type" => "Offer",
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"url" => event_url($e),
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"price" => $priceValue,
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"priceCurrency" => "EUR",
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"availability" => "https://schema.org/InStock",
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"validFrom" => $validFrom
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]) : null;
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$graph[] = array_filter([
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"@type" => "Event",
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"name" => $e['title'],
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"url" => event_url($e),
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"startDate" => $start,
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"endDate" => $endDate,
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"eventStatus" => "https://schema.org/EventScheduled",
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"eventAttendanceMode" => "https://schema.org/OfflineEventAttendanceMode",
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"performer" => !empty($e['speaker']) ? [
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"@type" => "Person",
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"name" => $e['speaker']
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] : null,
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"location" => [
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"@type" => "Place",
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"name" => $e['venue_name'] ?? "Veranstaltungsort",
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"address" => [
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"@type" => "PostalAddress",
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"streetAddress" => $e['venue_address'] ?? "",
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"addressLocality" => "Walschleben",
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"postalCode" => "99189",
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"addressCountry" => "DE"
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],
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],
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"image" => isset($e['image']) && $e['image'] !== '' ? [ BASE_URL . $e['image'] ] : [ BASE_URL . DEFAULT_OG_IMAGE ],
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"description" => $e['description'] ?? "",
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"organizer" => [
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"@type" => "Organization",
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"name" => SITE_NAME,
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"url" => BASE_URL
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],
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"offers" => $offers
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]);
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}
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return json_encode([
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"@context" => "https://schema.org",
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"@graph" => $graph
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], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
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}
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function h(?string $s): string {
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return htmlspecialchars($s ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
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}
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function normalize_price_value(string $price): ?string {
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$value = preg_replace('/[^\d,\.]/', '', $price);
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if ($value === '') {
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return null;
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}
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if (substr_count($value, ',') > 0 && substr_count($value, '.') > 0) {
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$value = str_replace('.', '', $value);
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$value = str_replace(',', '.', $value);
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} else {
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$value = str_replace(',', '.', $value);
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}
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return rtrim($value, '.');
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}
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function build_event_end_date(array $event, string $fallbackTime): ?string {
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$endDate = trim((string)($event['end_date'] ?? ''));
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$endTime = trim((string)($event['end_time'] ?? ''));
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$time = $endTime !== '' ? $endTime : $fallbackTime;
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if ($endDate !== '') {
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return $endDate . 'T' . $time . ':00+02:00';
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}
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// Falls keine Endzeit gepflegt ist, nehmen wir das Startdatum, damit Schema-Validatoren zufrieden sind.
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if (!empty($event['date'])) {
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return $event['date'] . 'T' . $time . ':00+02:00';
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}
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return null;
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}
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/**
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* Erkennt, ob HTML-Tags enthalten sind.
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*/
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function has_html_tags(string $s): bool {
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return (bool) preg_match('/<\s*\w+[^>]*>/', $s);
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}
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/**
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* Erlaubte, sichere HTML-Ausgabe (Whitelist + Attribut-Filter).
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* Erlaubt: p, br, ul/ol/li, b/strong, i/em, u, a, blockquote, h3-h5
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* Entfernt: on* Handler, javascript: URLs, style/iframe/script usw.
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* Fügt bei Links rel="noopener nofollow ugc" hinzu und erlaubt nur http(s).
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*/
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function render_rich_text(string $input): string {
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$input = trim($input);
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// Fall A: Kein HTML -> wir schützen & konvertieren Zeilenumbrüche
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if (!has_html_tags($input)) {
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return nl2br(h($input));
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}
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// Fall B: HTML vorhanden -> nur erlaubte Tags behalten
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$allowed = '<p><br><ul><ol><li><b><strong><i><em><u><a><blockquote><h3><h4><h5>';
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$html = strip_tags($input, $allowed);
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// Gefährliche Event-Handler entfernen (on*)
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$html = preg_replace('/\s+on\w+\s*=\s*(".*?"|\'.*?\'|[^\s>]+)/i', '', $html);
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// style-Attribute entfernen (vermeidet versteckte JS/CSS-Tricks)
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$html = preg_replace('/\s+style\s*=\s*(".*?"|\'.*?\'|[^\s>]+)/i', '', $html);
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// href bereinigen: nur http/https erlauben, sonst entfernen
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// Außerdem rel/target ergänzen
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$html = preg_replace_callback(
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'/<a\s+([^>]*href\s*=\s*(["\'])(.*?)\2[^>]*)>/i',
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function ($m) {
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$attr = $m[1];
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$url = $m[3];
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// javascript:, data:, mailto: usw. blocken (nur http/https)
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if (!preg_match('~^https?://~i', $url)) {
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// href wegnehmen
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$attr = preg_replace('/\s*href\s*=\s*(".*?"|\'.*?\'|[^\s>]+)/i', '', $attr);
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$url = null;
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}
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// target & rel setzen
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if ($url) {
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// target="_blank"
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if (!preg_match('/\btarget\s*=/i', $attr)) {
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$attr .= ' target="_blank"';
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}
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// rel ergänzen
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if (preg_match('/\brel\s*=\s*("|\')(.*?)\1/i', $attr, $r)) {
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$rels = array_map('trim', explode(' ', $r[2] ?: ''));
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foreach (['noopener','nofollow','ugc'] as $need) {
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if (!in_array($need, $rels, true)) $rels[] = $need;
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}
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$attr = preg_replace('/\brel\s*=\s*("|\')(.*?)\1/i', ' rel="'.implode(' ', $rels).'"', $attr);
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} else {
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$attr .= ' rel="noopener nofollow ugc"';
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}
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}
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return '<a ' . trim($attr) . '>';
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},
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$html
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);
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// Restliche "href='javascript:…'"-Muster sicherheitshalber neutralisieren
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$html = preg_replace('/href\s*=\s*(["\'])\s*javascript:[^"\']*\1/i', '', $html);
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// Doppelte/überflüssige Leerzeichen in Tags aufräumen
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$html = preg_replace('/\s{2,}/', ' ', $html);
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return $html;
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}
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