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@@ -268,6 +268,152 @@ function saveProducts($products) {
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writeJsonFile(PRODUCTS_FILE, $data);
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}
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+/**
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+ * Resolve FAQ file path and force storage inside DATA_DIR.
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+ */
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+function getFaqFilePath(): string {
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+ $dataDir = defined('DATA_DIR') && is_string(DATA_DIR) ? DATA_DIR : (dirname(__DIR__) . '/data/');
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+ $defaultPath = rtrim($dataDir, '/\\') . '/faq.json';
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+
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+ if (!defined('FAQ_FILE') || !is_string(FAQ_FILE) || FAQ_FILE === '') {
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+ return $defaultPath;
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+ }
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+
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+ $configuredPath = FAQ_FILE;
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+ $normalizedDataDir = str_replace('\\', '/', rtrim($dataDir, '/\\')) . '/';
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+ $normalizedConfigured = str_replace('\\', '/', $configuredPath);
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+
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+ if (strpos($normalizedConfigured, $normalizedDataDir) !== 0) {
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+ return $defaultPath;
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+ }
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+
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+ return $configuredPath;
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+}
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+
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+/**
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+ * Get FAQ markdown content from JSON store.
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+ */
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+function getFaqContent(): string {
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+ $defaultContent = "# FAQ\n\nHier kann der FAQ-Inhalt im Admin-Bereich bearbeitet werden.";
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+ $data = readJsonFile(getFaqFilePath());
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+ if (!is_array($data)) {
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+ return $defaultContent;
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+ }
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+
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+ if (!isset($data['content']) || !is_string($data['content'])) {
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+ return $defaultContent;
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+ }
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+
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+ return $data['content'];
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+}
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+
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+/**
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+ * Save FAQ markdown content to JSON store.
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+ */
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+function saveFaqContent(string $markdown): void {
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+ writeJsonFile(getFaqFilePath(), ['content' => (string) $markdown]);
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+}
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+
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+/**
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+ * Render inline markdown safely (bold + italic).
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+ */
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+function renderFaqInlineMarkdown(string $text): string {
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+ $escaped = htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
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+
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+ // Apply markdown after escaping so raw HTML is never executed.
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+ $escaped = preg_replace('/\*\*(.+?)\*\*/s', '<strong>$1</strong>', $escaped);
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+ $escaped = preg_replace('/(?<!\*)\*(?!\s)(.+?)(?<!\s)\*(?!\*)/s', '<em>$1</em>', $escaped);
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+
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+ return $escaped;
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+}
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+
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+/**
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+ * Render a minimal safe markdown subset for FAQ content.
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+ */
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+function renderFaqMarkdown(string $markdown): string {
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+ $normalized = str_replace(["\r\n", "\r"], "\n", $markdown);
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+ $lines = explode("\n", $normalized);
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+ $htmlParts = [];
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+ $paragraphLines = [];
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+ $listType = '';
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+
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+ $flushParagraph = function () use (&$paragraphLines, &$htmlParts): void {
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+ if (empty($paragraphLines)) {
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+ return;
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+ }
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+
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+ $renderedLines = [];
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+ foreach ($paragraphLines as $line) {
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+ $renderedLines[] = renderFaqInlineMarkdown($line);
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+ }
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+
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+ $htmlParts[] = '<p>' . implode("<br>\n", $renderedLines) . '</p>';
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+ $paragraphLines = [];
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+ };
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+
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+ $closeList = function () use (&$listType, &$htmlParts): void {
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+ if ($listType === '') {
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+ return;
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+ }
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+
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+ $htmlParts[] = '</' . $listType . '>';
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+ $listType = '';
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+ };
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+
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+ foreach ($lines as $line) {
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+ $line = rtrim($line);
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+ $trimmed = trim($line);
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+
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+ if ($trimmed === '') {
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+ $flushParagraph();
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+ $closeList();
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+ continue;
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+ }
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+
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+ if (preg_match('/^(#{1,3})\s+(.+)$/', $trimmed, $matches) === 1) {
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+ $flushParagraph();
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+ $closeList();
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+ $level = strlen($matches[1]);
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+ $htmlParts[] = '<h' . $level . '>' . renderFaqInlineMarkdown($matches[2]) . '</h' . $level . '>';
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+ continue;
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+ }
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+
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+ if (preg_match('/^\s*[-*]\s+(.+)$/', $line, $matches) === 1) {
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+ $flushParagraph();
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+ if ($listType !== 'ul') {
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+ $closeList();
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+ $listType = 'ul';
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+ $htmlParts[] = '<ul>';
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+ }
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+ $htmlParts[] = '<li>' . renderFaqInlineMarkdown($matches[1]) . '</li>';
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+ continue;
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+ }
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+
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+ if (preg_match('/^\s*\d+\.\s+(.+)$/', $line, $matches) === 1) {
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+ $flushParagraph();
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+ if ($listType !== 'ol') {
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+ $closeList();
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+ $listType = 'ol';
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+ $htmlParts[] = '<ol>';
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+ }
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+ $htmlParts[] = '<li>' . renderFaqInlineMarkdown($matches[1]) . '</li>';
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+ continue;
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+ }
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+
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+ $closeList();
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+ $paragraphLines[] = $trimmed;
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+ }
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+
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+ $flushParagraph();
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+ $closeList();
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+
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+ if (empty($htmlParts)) {
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+ return '<p>Keine FAQ-Inhalte vorhanden.</p>';
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+ }
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+
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+ return implode("\n", $htmlParts);
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+}
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+
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/**
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* Get all reservations
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*/
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