Dark theme, scan auto-ingest, packaging prep, and README refresh

app/ingest.py

@@ -88,6 +88,42 @@ def ingest_dat(conn, path):
     return dat_name, system, release_count, rom_count
 
 
+def ensure_catalog(dats_dir=None, conn=None):
+    """Ingest any DAT files missing from the DB (idempotent, cheap when current).
+
+    Called once at startup so a fresh/reset database still has the catalog and
+    scanning produces matches instead of everything coming back ``unknown``.
+    Returns the number of DATs ingested.
+    """
+    dats_dir = Path(dats_dir) if dats_dir else config.DATS_DIR
+    if not dats_dir.is_dir():
+        return 0
+    files = sorted(p for p in dats_dir.glob("*.dat") if p.is_file())
+    if not files:
+        return 0
+
+    own = conn is None
+    if own:
+        conn = get_connection(config.DB_PATH)
+    try:
+        known = {r["source_path"] for r in conn.execute("SELECT source_path FROM dats")}
+        count = 0
+        for path in files:
+            if str(path) in known:
+                continue
+            try:
+                ingest_dat(conn, path)
+            except Exception as exc:  # noqa: BLE001 - a bad DAT shouldn't block startup
+                print(f"warning: could not ingest {path.name}: {exc}", file=sys.stderr)
+                continue
+            count += 1
+        conn.commit()
+        return count
+    finally:
+        if own:
+            conn.close()
+
+
 def main(argv=None):
     parser = argparse.ArgumentParser(description="Ingest clrmamepro DAT files into SQLite")
     parser.add_argument("--dats", help="directory containing .dat files (default: data/dats)")