Parse batch number and date from upload filename for live API lookup

AGENTS.md

@@ -9,6 +9,7 @@
 - `batch_store.py` — shared SQLite persistence + batch state machine.
 - `counter_dashboard.py` — Flask dashboard on port 5000, same DB.
 - `recounting_dashboard.py` — Flask recounting dashboard on port 5002, consumes live + recount APIs.
+- `recounting_dashboard_upload.py` — Flask upload+recount dashboard on port 5003; uploads MP4 first, then launches `RECOUNT_CMD --source <mp4>`; START RECOUNT stays disabled until an upload completes.
 
 ## No build / test / lint
 
@@ -30,6 +31,9 @@ PYTHONNOUSERSITE=1 venv/bin/python counter_live_rknn_bytetrack.py
 
 # Run dashboard
 PYTHONNOUSERSITE=1 venv/bin/python counter_dashboard.py
+
+# Run upload recounting dashboard
+PYTHONNOUSERSITE=1 venv/bin/python recounting_dashboard_upload.py
 ```
 
 ## Key environment & install quirks
@@ -42,6 +46,8 @@ PYTHONNOUSERSITE=1 venv/bin/python counter_dashboard.py
 - Two systemd units: `bytetrack-counter.service` + `bytetrack-counter-dashboard.service`.
 - `counter_live.py` (TensorRT) is Jetson-only and won't work on RK3588.
 - **Reset flow**: `POST /api/reset` → deletes state JSON + touches `{SHM_DIR}/.reset`. `batch_store._check_reset_signal()` watches this marker and clears in-memory state on next crossing.
+- **Upload filename contract**: uploads are expected as `batch_XX_YYYYMMDD_HHmmSS.mp4` (XX = batch number, timestamp = date). `recounting_dashboard_upload.py` parses both to query the live API's `/api/day-detail/<YYYY-MM-DD>` for the recorded count.
+- **`RECOUNT_CMD`** in the upload dashboard is a template with a `{path}` placeholder, e.g. `bytetrack-counter config.env --source {path}`; the uploaded file path is `shlex.quote()`d before substitution.
 
 ## Code conventions
 

SPEC.md

@@ -13,10 +13,10 @@ Daily cutoff @ HH:MM resets batch numbering. RK3588 hardware.
 - `numpy<2` (rknn-toolkit-lite2 incompatible with numpy≥2)
 - `PYTHONNOUSERSITE=1` ! set or venv breaks
 - SQLite for persistence, JSON file for active-batch state
-- Flask on port 5000 (dashboard) + 5002 (recounting), systemd supervision
+- Flask on port 5000 (dashboard) + 5002 (recounting) + 5003 (upload recounting), systemd supervision
 - `counter_live.py` ⊥ run on RK3588 — Jetson TensorRT artifact, ! port target
 - `counter_live_rknn_bytetrack.py` — reference for C++ port, this is what systemd runs
-- Single deployment: `counter_live_rknn_bytetrack.py` + `counter_dashboard.py` + `recounting_dashboard.py`
+- Single deployment: `counter_live_rknn_bytetrack.py` + `counter_dashboard.py` + `recounting_dashboard.py` + `recounting_dashboard_upload.py`
 - `go2rtc` ! running for recounting MP4 streaming (port 1984)
 
 ## §I — Interfaces
@@ -63,6 +63,14 @@ env: RECOUNT_API_URL → base URL of recounting counter API (second node)
 env: GO2RTC_API_URL → go2rtc REST API (default http://localhost:1984)
 env: GO2RTC_STREAM_NAME → go2rtc stream name for recount preview (default "recount")
 ```
+
+### Upload recounting dashboard config
+```
+env: RECOUNTING_UPLOAD_PORT → port for upload UI (default 5003)
+env: UPLOAD_DIR → dir for uploaded MP4s (default <repo>/uploads)
+env: RECOUNT_CMD → replay command template with {path} placeholder (default "bytetrack-counter config.env --source {path}")
+env: RECOUNTING_UPLOAD_TEMPLATE → template (default recounting_upload.html)
+```
 ```
 
 ### SQLite
@@ -107,6 +115,22 @@ api: GET /api/download-mp4?file=<path> → download selected MP4
 api: POST /api/start-recount {path} → reset recount counter + launch ffmpeg RTSP, return {stream_url}
 api: POST /api/stop-recount → kill ffmpeg + clear current file
 ```
+
+### Upload recounting dashboard
+```
+api: GET / → upload recounting HTML (template via RECOUNTING_UPLOAD_TEMPLATE env var)
+api: POST /api/upload → multipart .mp4 (≤512MB), saved as original filename in UPLOAD_DIR; returns {name, path, size}
+api: GET /api/uploads → list uploaded MP4s sorted by mtime desc → [ {name, path, size, mtime} ]
+api: POST /api/delete-upload {path} → delete uploaded MP4 (path restricted to UPLOAD_DIR)
+api: POST /api/start-recount {path} → reset recount API then launch RECOUNT_CMD (path shlex-quoted); START RECOUNT disabled until upload completes
+api: POST /api/stop-recount → kill recount process + clear current file
+api: GET /api/state → {streaming, file, file_name, stream_url, batch_number, batch_date}
+api: GET /api/proxy-stream → proxy MJPEG from RECOUNT_API_URL:/api/live-video (same-origin)
+api: GET /api/live-progress → proxy to LIVE_API_URL:/api/current-batch
+api: GET /api/recount-progress → proxy to RECOUNT_API_URL:/api/current-batch
+api: GET /api/batch-result?file=<path> → parse batch num + date (YYYY-MM-DD) from filename batch_XX_YYYYMMDD_HHmmSS.mp4, query live API /api/day-detail/<date>, fallback recent-batches
+api: GET /api/download-mp4?file=<path> → download selected MP4
+```
 ```
 
 ## §V — Invariants
@@ -132,6 +156,7 @@ V17: tracks pruned after TRACKED_PRUNE_SEC (default 300s) without update
 V18: .env missing → scripts fail at import (os.getenv falls back to defaults, may mismatch)
 V19: stream reconnect → reset motion detection state (prev_gray = None)
 V20: reset → delete STATE_FILE + touch {SHM_DIR}/.reset; batch_store._check_reset_signal() watches marker & clears in-memory state before next crossing
+V21: upload filename batch_XX_YYYYMMDD_HHmmSS.mp4 → batch# + date parsed; batch-result queries /api/day-detail/<YYYY-MM-DD> on live API
 ```
 
 ## §T — Tasks
@@ -152,6 +177,7 @@ T11|x|reduce live-counter poll interval 2000→200ms for real-time feel|
 T12|x|add recounting dashboard — dual-API counter panels, MP4 browser, go2rtc streaming|
 T13|x|add template system — DASHBOARD_TEMPLATE env var selects dashboard.html|lamborghini|tesla|
 T14|x|harden reset API — separate SHM marker creation from state file cleanup; return 500 on SHM failure|V20
+T15|x|add upload recounting dashboard — MP4 upload, progress bar, RECOUNT_CMD replay|V21
 ```
 
 ## §B — Bugs

recounting_dashboard_upload.py

@@ -46,7 +46,7 @@ RECOUNT_CMD = os.getenv("RECOUNT_CMD", "bytetrack-counter config.env --source {p
 _http_session = requests.Session()
 _http_session.timeout = 3
 
-_FILENAME_RE = re.compile(r"batch[_-]?(\d+)", re.IGNORECASE)
+_FILENAME_RE = re.compile(r"batch[_-]?(\d+)[_-](\d{8})[_-]\d{6}", re.IGNORECASE)
 
 _recount_proc = None
 _recount_lock = threading.Lock()
@@ -56,7 +56,8 @@ _current_file = None
 def _parse_filename(filename):
     m = _FILENAME_RE.search(filename)
     if m:
-        return int(m.group(1)), None
+        raw = m.group(2)
+        return int(m.group(1)), f"{raw[:4]}-{raw[4:6]}-{raw[6:8]}"
     return None, None
 
 
@@ -254,9 +255,13 @@ def api_proxy_stream():
 def api_batch_result():
     fpath = request.args.get("file", "")
     filename = Path(fpath).name
-    batch_num, _ = _parse_filename(filename)
+    batch_num, date_str = _parse_filename(filename)
     if batch_num is None:
         return jsonify({"success": False, "error": "Cannot parse batch number from filename"}), 200
+    if not date_str:
+        date_str = _folder_date(fpath, Path(UPLOAD_DIR))
+    if not date_str:
+        return jsonify({"success": False, "error": "Cannot determine date from filename"}), 200
 
     def _match_in_batches(batches):
         for b in batches:
@@ -264,20 +269,18 @@ def api_batch_result():
                 return b
         return None
 
-    date_str = _folder_date(fpath, Path(UPLOAD_DIR))
-    if date_str:
-        data = _api_get(LIVE_API_URL, f"/api/day-detail/{date_str}")
-        if data:
-            b = _match_in_batches(data.get("batches", []))
-            if b:
-                return jsonify({
-                    "success": True,
-                    "batch_number": batch_num,
-                    "date": date_str,
-                    "count": b["count"],
-                    "start_time": b.get("start_time"),
-                    "end_time": b.get("end_time"),
-                })
+    data = _api_get(LIVE_API_URL, f"/api/day-detail/{date_str}")
+    if data:
+        b = _match_in_batches(data.get("batches", []))
+        if b:
+            return jsonify({
+                "success": True,
+                "batch_number": batch_num,
+                "date": date_str,
+                "count": b["count"],
+                "start_time": b.get("start_time"),
+                "end_time": b.get("end_time"),
+            })
 
     recent = _api_get(LIVE_API_URL, "/api/recent-batches?limit=100")
     if recent: