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

app/cis.py

@@ -297,6 +297,19 @@ class CISClient:
                                matrikel=mail.split("@")[0] if "@" in mail else ""))
         return out
 
+    # ---------- Studien-Semester pro StG ----------
+    @lru_cache(maxsize=64)
+    def study_semesters(self, kz: str) -> list[int]:
+        """Von CIS bekannte Studien-Semester eines StG (z.B. [1..6] BSc, [1..4] MSc)."""
+        try:
+            r = self.s.post(f"{self.base}/private/lvplan/lvplan_autocomplete.php",
+                            data={"autocomplete": "getSemester", "stg_kz": kz}, timeout=30)
+            data = r.json()
+            vals = data.values() if isinstance(data, dict) else data
+            return sorted({int(x) for x in vals if str(x).strip().isdigit()})
+        except Exception:
+            return []
+
     # ---------- Verbände pro StG/Semester ----------
     def verbands_for(self, kz: str, sem: str) -> list[str]:
         fallback = ["V", "B", "G", "A", "C", "D", "E", "F"]