feat: alert wecom when no designer is available

db/chat_log_db.py

@@ -8,7 +8,7 @@ import sqlite3
 import os
 import threading
 from queue import Queue, Empty
-from datetime import datetime
+from datetime import datetime, timedelta
 from typing import List, Dict, Optional
 
 _DB_PATH = os.path.join(os.path.dirname(__file__), "chat_log_db", "chats.db")
@@ -527,6 +527,49 @@ def get_latest_messages(limit: int = 20) -> List[Dict]:
     return [dict(r) for r in rows]
 
 
+def get_waiting_customer_pool(window_minutes: int = 30) -> Dict:
+    """统计最近窗口内、最后一条消息仍来自客户的待接待客户池。"""
+    cutoff = (datetime.now() - timedelta(minutes=max(window_minutes, 1))).strftime("%Y-%m-%d %H:%M:%S")
+    with _get_conn() as conn:
+        rows = conn.execute(_sql("""
+            SELECT id, customer_id, acc_id, direction, timestamp
+            FROM chat_logs
+            WHERE timestamp >= ?
+              AND customer_id <> ''
+              AND customer_id <> 'unknown'
+              AND acc_id <> ''
+            ORDER BY id DESC
+        """), (cutoff,)).fetchall()
+
+    latest_by_session = {}
+    for row in rows:
+        item = dict(row)
+        key = (str(item.get("customer_id") or ""), str(item.get("acc_id") or ""))
+        if key not in latest_by_session:
+            latest_by_session[key] = item
+
+    per_shop: Dict[str, int] = {}
+    waiting_sessions = 0
+    for item in latest_by_session.values():
+        if str(item.get("direction") or "") != "in":
+            continue
+        acc_id = str(item.get("acc_id") or "")
+        if not acc_id:
+            continue
+        per_shop[acc_id] = per_shop.get(acc_id, 0) + 1
+        waiting_sessions += 1
+
+    shops = [
+        {"acc_id": acc_id, "waiting_customers": count}
+        for acc_id, count in sorted(per_shop.items(), key=lambda kv: (-kv[1], kv[0]))
+    ]
+    return {
+        "total_waiting_customers": waiting_sessions,
+        "shops": shops,
+        "window_minutes": window_minutes,
+    }
+
+
 # ========== 订单相关 ==========
 
 @_retry_db_operation