Studien-Semester-Select: parit\u00e4ts- und umfangsgerecht (WS ungerade, SS gerade; BSc 1-6, MSc 1-4) aus CIS-Endpoint

app/static/app.js

@@ -380,7 +380,32 @@ function decodeMat() {
   box.classList.add("show");
 }
 
-/* ================= Verband-Selects dynamisch ================= */
+/* ================= Seminar- + Verband-Selects dynamisch ================= */
+async function reloadSemesters() {
+  const sel = $("#sem-select");
+  const stgSel = $("#stg-select");
+  if (!sel || !stgSel) return;
+  const kz = stgSel.value;
+  const planSem = (($('select[name="semester"]') || {}).value || "").toUpperCase();
+  try {
+    const r = await fetch(`/api/semesters_for_stg?kz=${encodeURIComponent(kz)}`);
+    if (!r.ok) throw new Error("bad status");
+    let data = await r.json();
+    let arr = (Array.isArray(data) ? data : Object.values(data))
+      .map(Number).filter(n => Number.isInteger(n) && n > 0);
+    if (planSem.startsWith("WS")) arr = arr.filter(n => n % 2 === 1);
+    else if (planSem.startsWith("SS")) arr = arr.filter(n => n % 2 === 0);
+    arr = [...new Set(arr)].sort((a, b) => a - b);
+    if (arr.length) {
+      const current = sel.value;
+      sel.innerHTML = arr.map(n =>
+        `<option value="${n}"${n === Number(current) ? " selected" : ""}>${n}</option>`).join("");
+      if (current && !arr.includes(Number(current))) sel.selectedIndex = 0;
+    }
+  } catch (e) { /* Keep static options */ }
+  reloadVerbands();
+}
+
 async function reloadVerbands() {
   const sel = $("#ver-select");
   if (!sel) return;