fix(viewer+backend): cache sorties TTL 10min + /sorties/local + viewer non-bloquant

pipeline_runner/main.py

@@ -1,6 +1,7 @@
 import asyncio
 import gzip
 import json
+import time
 from pathlib import Path
 from typing import AsyncGenerator
 
@@ -9,7 +10,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse, StreamingResponse
 
 from .config import OUTPUT_DIR
-from .runner import run_pipeline, scan_sorties
+from .runner import run_pipeline, scan_sorties, scan_sorties_local
 
 app = FastAPI(title="COSMA Pipeline Runner")
 app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"])
@@ -17,10 +18,51 @@ app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], all
 # Active pipeline jobs: sortie_id → asyncio.Queue
 _jobs: dict[str, asyncio.Queue] = {}
 
+# Cache sorties avec TTL 10min
+_sorties_cache: list | None = None
+_sorties_cache_ts: float = 0.0
+_SORTIES_TTL = 600.0  # 10 minutes
+_sorties_refresh_lock: asyncio.Lock | None = None
+
+
+def _get_lock() -> asyncio.Lock:
+    global _sorties_refresh_lock
+    if _sorties_refresh_lock is None:
+        _sorties_refresh_lock = asyncio.Lock()
+    return _sorties_refresh_lock
+
+
+async def _refresh_sorties_cache() -> None:
+    """Refresh cache in background (holds lock to avoid parallel rclone calls)."""
+    global _sorties_cache, _sorties_cache_ts
+    lock = _get_lock()
+    async with lock:
+        # Double-check after acquiring lock
+        if time.monotonic() - _sorties_cache_ts < _SORTIES_TTL:
+            return
+        result = await asyncio.to_thread(scan_sorties)
+        _sorties_cache = result
+        _sorties_cache_ts = time.monotonic()
+
 
 @app.get("/sorties")
 async def list_sorties():
-    return await scan_sorties()
+    global _sorties_cache, _sorties_cache_ts
+    now = time.monotonic()
+    if _sorties_cache is None:
+        # Premier appel: bloquant (cache vide)
+        await _refresh_sorties_cache()
+    elif now - _sorties_cache_ts >= _SORTIES_TTL:
+        # Cache périmé: retourne le cache, refresh en arrière-plan
+        asyncio.create_task(_refresh_sorties_cache())
+    return _sorties_cache or []
+
+
+@app.get("/sorties/local")
+async def list_sorties_local():
+    """Scan /data/sorties local (NAS, instantané) sans rclone."""
+    sorties = await asyncio.to_thread(scan_sorties_local)
+    return sorties
 
 
 @app.post("/run/{sortie_id:path}")