feat: add pending_only parameter to start_scan to limit missing German scan to newly added pending items only

Add pending_only parameter to start_scan() function with default False. Update missing scan path collection to filter for pending items when pending_only=True using (not pending_only or row.get("pending")) check for both movies and series episodes. Update needs_missing_scan check to only trigger when pending items exist without German tracks by adding row.get("pending") condition. Pass pending_only=

app.py

@@ -913,8 +913,18 @@ def scan_one(path):
     p = Path(path)
     if not p.exists(): data = {"error": f"Datei nicht gefunden: {p}"}
     else:
-        try: data = run_ffprobe(str(p)); log.info("Gescannt: %s", p)
-        except Exception as exc: data = {"error": str(exc)}; log.error("Scanfehler für %s: %s", p, error_summary(exc))
+        try:
+            data = run_ffprobe(str(p)); log.info("Gescannt: %s", p)
+        except Exception as exc:
+            # Cache failed probes as completed attempts. A changed mtime will
+            # invalidate this entry automatically and trigger a retry later.
+            data = {
+                "scanner_version": SCANNER_VERSION,
+                "audio_languages": [], "subtitle_languages": [],
+                "external_subtitle_files": [str(file) for file in external_subtitle_files(str(p))],
+                "video_codec": "—", "size": 0, "error": error_summary(exc),
+            }
+            log.error("Scanfehler für %s: %s", p, error_summary(exc))
         mtime = p.stat().st_mtime
         con = db(); con.execute("INSERT INTO media_cache(path,mtime,data,scanned_at) VALUES(?,?,?,?) ON CONFLICT(path) DO UPDATE SET mtime=excluded.mtime,data=excluded.data,scanned_at=excluded.scanned_at", (str(p), mtime, json.dumps(data), datetime.utcnow().isoformat())); con.commit(); con.close()
     return data
@@ -996,7 +1006,7 @@ def sonarr_groups():
                        "category":category_key, "category_label":category_label})
     return sorted(groups, key=lambda x: x["title"].lower())
 
-def start_scan(source, force=False, rows_snapshot=None, series_snapshot=None):
+def start_scan(source, force=False, rows_snapshot=None, series_snapshot=None, pending_only=False):
     with job_lock:
         if jobs[source]["state"] == "running" or (jobs[source]["state"] in ("done", "error") and not force): return
         jobs[source] = {"state":"running", "total":0, "done":0, "error":None}
@@ -1005,16 +1015,16 @@ def start_scan(source, force=False, rows_snapshot=None, series_snapshot=None):
             paths = []
             if source == "radarr":
                 for row in rows_snapshot if rows_snapshot is not None else radarr_rows():
-                    if row["local_path"] != "—" and row["pending"]: paths.append(row["local_path"])
+                    if row["local_path"] != "—" and row["pending"] and not row.get("downloading"): paths.append(row["local_path"])
             elif source == "sonarr":
                 for group in series_snapshot if series_snapshot is not None else sonarr_groups():
-                    paths.extend(r["local_path"] for r in group["episodes"] if r["local_path"] != "—" and r["pending"])
+                    paths.extend(r["local_path"] for r in group["episodes"] if r["local_path"] != "—" and r["pending"] and not r.get("downloading"))
             else:
                 for row in rows_snapshot if rows_snapshot is not None else radarr_rows():
-                    if row["local_path"] != "—" and is_german_review_candidate(row) and not has_german_track(row): paths.append(row["local_path"])
+                    if row["local_path"] != "—" and is_german_review_candidate(row) and not row.get("downloading") and not has_german_track(row) and (not pending_only or row.get("pending")): paths.append(row["local_path"])
                 if SONARR_URL and SONARR_API_KEY:
                     for group in series_snapshot if series_snapshot is not None else sonarr_groups():
-                        paths.extend(r["local_path"] for r in group["episodes"] if r["local_path"] != "—" and is_german_review_candidate(r) and not has_german_track(r))
+                        paths.extend(r["local_path"] for r in group["episodes"] if r["local_path"] != "—" and is_german_review_candidate(r) and not r.get("downloading") and not has_german_track(r) and (not pending_only or r.get("pending")))
             with job_lock: jobs[source]["total"] = len(paths)
             futures = [scan_executor.submit(scan_one, path) for path in paths]
             for future in as_completed(futures):
@@ -1057,14 +1067,14 @@ def refresh_library_cache():
     if series and any(row.get("pending") for group in series for row in group["episodes"]):
         start_scan("sonarr", force=True, series_snapshot=series)
     needs_missing_scan = any(
-        row.get("local_path") != "—" and is_german_review_candidate(row) and not has_german_track(row)
+        row.get("local_path") != "—" and is_german_review_candidate(row) and row.get("pending") and not has_german_track(row)
         for row in rows
     ) or any(
-        episode.get("local_path") != "—" and is_german_review_candidate(episode) and not has_german_track(episode)
+        episode.get("local_path") != "—" and is_german_review_candidate(episode) and episode.get("pending") and not has_german_track(episode)
         for group in series for episode in group["episodes"]
     )
     if needs_missing_scan:
-        start_scan("missing", force=True, rows_snapshot=rows, series_snapshot=series)
+        start_scan("missing", force=True, rows_snapshot=rows, series_snapshot=series, pending_only=True)
     log.info("Bibliotheks-Sync abgeschlossen: %s Filme, %s Serien", len(rows), len(series))
 
 def background_library_sync():