feat: update device interaction module

- Update apps, consumers, and serializers
- Add scheduler and tasks modules

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

qy_lty/device_interaction/apps.py

@@ -1,6 +1,16 @@
 from django.apps import AppConfig
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class DeviceInteractionConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "device_interaction"
+
+    def ready(self):
+        from .scheduler import start
+        try:
+            start()
+        except Exception as e:
+            logger.error(f"Error starting device online check scheduler: {e}")

qy_lty/device_interaction/consumers.py

@@ -1,6 +1,8 @@
 import json
+import time
 from channels.generic.websocket import AsyncWebsocketConsumer
 from channels.db import database_sync_to_async
+from django.core.cache import cache
 import logging
 
 logger = logging.getLogger(__name__)
@@ -38,8 +40,9 @@ class DeviceConsumer(AsyncWebsocketConsumer):
             )
             
             await self.accept()
+            self.device_mac = None  # 设备MAC，收到device_info后赋值
             logger.info('WebSocket connection accepted')
-            
+
         except Exception as e:
             logger.error(f"Error in WebSocket connect: {str(e)}")
             await self.close(code=4002)
@@ -103,7 +106,7 @@ class DeviceConsumer(AsyncWebsocketConsumer):
     @database_sync_to_async
     def update_device_status(self, mac_address, device_data):
         """
-        根据设备上报信息更新数据库中的设备状态
+        根据设备上报信息更新数据库中的设备状态，并记录心跳时间到Redis
         """
         try:
             from .models import Device
@@ -115,16 +118,45 @@ class DeviceConsumer(AsyncWebsocketConsumer):
                     device.firmware_version = device_data['firmware_version']
                 if 'wifi_name' in device_data:
                     device.wifi_name = device_data['wifi_name']
+                if 'wifi_password' in device_data:
+                    device.wifi_password = device_data['wifi_password']
                 if 'brightness' in device_data:
                     device.brightness = device_data['brightness']
                 device.status = 'connected'
                 device.save()
+                # 记录最后活跃时间到Redis（超时5分钟自动过期）
+                cache.set(f"device:last_seen:{mac_address}", time.time(), timeout=300)
                 logger.info(f"Updated device status for MAC: {mac_address}")
         except Exception as e:
             logger.error(f"Failed to update device status: {str(e)}")
 
+    @database_sync_to_async
+    def mark_device_offline(self, mac_address):
+        """
+        将设备标记为离线
+        """
+        try:
+            from .models import Device
+            Device.objects.filter(mac_address=mac_address, status='connected').update(status='disconnected')
+            cache.delete(f"device:last_seen:{mac_address}")
+            logger.info(f"Device marked offline: {mac_address}")
+        except Exception as e:
+            logger.error(f"Failed to mark device offline: {str(e)}")
+
+    @database_sync_to_async
+    def refresh_device_heartbeat(self, mac_address):
+        """
+        刷新设备心跳时间（仅更新Redis，不写DB）
+        """
+        cache.set(f"device:last_seen:{mac_address}", time.time(), timeout=300)
+
     async def disconnect(self, close_code):
         try:
+            # 设备断开时标记为离线
+            if hasattr(self, 'device_mac') and self.device_mac:
+                await self.mark_device_offline(self.device_mac)
+                logger.info(f'Device {self.device_mac} marked offline on disconnect')
+
             # 只有在用户已认证且已加入组的情况下才执行移除操作
             if hasattr(self, 'group_name'):
                 # 将用户从组中移除
@@ -174,7 +206,11 @@ class DeviceConsumer(AsyncWebsocketConsumer):
                 return
                 
             logger.info(f'Received message from user {self.user_id}: {message}')
-            
+
+            # 刷新设备心跳（如果已知MAC）
+            if hasattr(self, 'device_mac') and self.device_mac:
+                await self.refresh_device_heartbeat(self.device_mac)
+
             # 根据消息类型处理
             if message_type == 'weather':
                 try:
@@ -285,6 +321,7 @@ class DeviceConsumer(AsyncWebsocketConsumer):
                     # 更新数据库中的设备状态
                     mac_address = device_data.get('mac_address')
                     if mac_address:
+                        self.device_mac = mac_address  # 记录当前连接对应的设备MAC
                         await self.update_device_status(mac_address, device_data)
 
                     # 广播到 group，让手机端也能收到

qy_lty/device_interaction/scheduler.py

@@ -0,0 +1,27 @@
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.interval import IntervalTrigger
+import logging
+
+logger = logging.getLogger(__name__)
+
+scheduler = BackgroundScheduler()
+
+
+def start():
+    if not scheduler.running:
+        from device_interaction.tasks import check_device_online_status
+
+        scheduler.add_job(
+            check_device_online_status,
+            trigger=IntervalTrigger(seconds=60),
+            id='check_device_online_status',
+            replace_existing=True,
+        )
+        logger.info("Device online check scheduler started")
+        scheduler.start()
+
+
+def stop():
+    if scheduler.running:
+        scheduler.shutdown()
+        logger.info("Device online check scheduler stopped")

qy_lty/device_interaction/serializers.py

@@ -1,6 +1,8 @@
+import time
 from rest_framework import serializers
-from .models import DeviceType, DeviceBatch, Device, UserDevice
+from django.core.cache import cache
 from django.utils import timezone
+from .models import DeviceType, DeviceBatch, Device, UserDevice
 
 
 class DeviceTypeSerializer(serializers.ModelSerializer):
@@ -67,12 +69,20 @@ class UserDeviceSerializer(serializers.ModelSerializer):
     mac_address = serializers.ReadOnlyField(source='device.mac_address')
     device_type = serializers.ReadOnlyField(source='device.device_type.name')
     device_status = serializers.ReadOnlyField(source='device.status')
+    is_online = serializers.SerializerMethodField()
     battery_level = serializers.ReadOnlyField(source='device.battery_level')
     firmware_version = serializers.ReadOnlyField(source='device.firmware_version')
     wifi_name = serializers.ReadOnlyField(source='device.wifi_name')
     wifi_password = serializers.ReadOnlyField(source='device.wifi_password')
     brightness = serializers.ReadOnlyField(source='device.brightness')
-    
+
+    def get_is_online(self, obj):
+        """根据Redis中的last_seen判断设备是否在线（3分钟内有上报）"""
+        last_seen = cache.get(f"device:last_seen:{obj.device.mac_address}")
+        if last_seen is None:
+            return False
+        return (time.time() - float(last_seen)) <= 180
+
     class Meta:
         model = UserDevice
         fields = '__all__'

qy_lty/device_interaction/tasks.py

@@ -0,0 +1,32 @@
+import time
+import logging
+from django.core.cache import cache
+
+logger = logging.getLogger(__name__)
+
+# 超时阈值：3分钟（设备每2分钟上报一次，留1分钟容差）
+DEVICE_OFFLINE_TIMEOUT = 180
+
+
+def check_device_online_status():
+    """
+    检查所有状态为 connected 的设备，如果超过3分钟没有上报数据，标记为离线。
+    由定时任务每60秒调用一次。
+    """
+    from device_interaction.models import Device
+
+    connected_devices = Device.objects.filter(status='connected')
+    now = time.time()
+    offline_count = 0
+
+    for device in connected_devices:
+        last_seen = cache.get(f"device:last_seen:{device.mac_address}")
+        if last_seen is None or (now - float(last_seen)) > DEVICE_OFFLINE_TIMEOUT:
+            device.status = 'disconnected'
+            device.save(update_fields=['status'])
+            cache.delete(f"device:last_seen:{device.mac_address}")
+            offline_count += 1
+            logger.info(f"Device {device.mac_address} marked offline (timeout)")
+
+    if offline_count > 0:
+        logger.info(f"check_device_online_status: {offline_count} device(s) marked offline")