update

backend/src/services/training.service.ts

@@ -116,8 +116,7 @@ class TrainingService {
       FROM uebungen u
       LEFT JOIN uebung_teilnahmen t ON t.uebung_id = u.id
       ${userId ? `LEFT JOIN uebung_teilnahmen own_t ON own_t.uebung_id = u.id AND own_t.user_id = $3` : ''}
-      WHERE u.datum_von >= $1
-        AND u.datum_von <= $2
+      WHERE (u.datum_von BETWEEN $1 AND $2 OR u.datum_bis BETWEEN $1 AND $2 OR (u.datum_von <= $1 AND u.datum_bis >= $2))
       GROUP BY u.id ${userId ? `, own_t.status` : ''}
       ORDER BY u.datum_von ASC
     `;
@@ -510,16 +509,24 @@ function formatIcsDate(date: Date): string {
  * Continuation lines start with a single space.
  */
 function foldLine(line: string): string {
-  const MAX = 75;
-  if (line.length <= MAX) return line;
+  if (Buffer.byteLength(line, 'utf-8') <= 75) return line;
+  let folded = '';
+  let currentLine = '';
+  let currentBytes = 0;
 
-  let result = '';
-  while (line.length > MAX) {
-    result += line.substring(0, MAX) + '\r\n ';
-    line = line.substring(MAX);
+  for (const char of line) {
+    const charBytes = Buffer.byteLength(char, 'utf-8');
+    if (currentBytes + charBytes > 75) {
+      folded += currentLine + '\r\n ';
+      currentLine = char;
+      currentBytes = 1 + charBytes;
+    } else {
+      currentLine += char;
+      currentBytes += charBytes;
+    }
   }
-  result += line;
-  return result;
+  folded += currentLine;
+  return folded;
 }
 
 /**
@@ -592,7 +599,7 @@ export function generateICS(
     lines.push(foldLine(`SUMMARY:${escapeIcsText(summary)}`));
 
     if (descParts.length > 0) {
-      lines.push(foldLine(`DESCRIPTION:${escapeIcsText(descParts.join('\\n'))}`));
+      lines.push(foldLine(`DESCRIPTION:${escapeIcsText(descParts.join('\n'))}`));
     }
     if (event.ort) {
       lines.push(foldLine(`LOCATION:${escapeIcsText(event.ort)}`));