community

backend/community/views.py

@@ -0,0 +1,118 @@
+from rest_framework import viewsets, status, mixins, parsers
+from rest_framework.decorators import action
+from rest_framework.response import Response
+from rest_framework import serializers
+from django.core.signing import TimestampSigner, BadSignature, SignatureExpired
+from drf_spectacular.utils import extend_schema
+
+from shop.models import WeChatUser
+from .models import Activity, ActivitySignup, Topic, Reply, TopicMedia
+from .serializers import ActivitySerializer, ActivitySignupSerializer, TopicSerializer, ReplySerializer, TopicMediaSerializer
+
+def get_current_wechat_user(request):
+    """
+    根据 Authorization 头获取当前微信用户 (复用 shop app 的逻辑)
+    """
+    auth_header = request.headers.get('Authorization')
+    if not auth_header or not auth_header.startswith('Bearer '):
+        return None
+    token = auth_header.split(' ')[1]
+    signer = TimestampSigner()
+    try:
+        # 签名包含 openid
+        openid = signer.unsign(token, max_age=86400 * 30) # 30天有效
+        return WeChatUser.objects.filter(openid=openid).first()
+    except (BadSignature, SignatureExpired):
+        return None
+
+class ActivityViewSet(viewsets.ReadOnlyModelViewSet):
+    """
+    社区活动接口
+    """
+    queryset = Activity.objects.filter(is_active=True).order_by('-created_at')
+    serializer_class = ActivitySerializer
+
+    @extend_schema(summary="报名活动")
+    @action(detail=True, methods=['post'])
+    def signup(self, request, pk=None):
+        user = get_current_wechat_user(request)
+        if not user:
+            return Response({'error': '请先登录'}, status=401)
+        
+        activity = self.get_object()
+        
+        # Check if already signed up
+        if ActivitySignup.objects.filter(activity=activity, user=user).exists():
+            return Response({'error': '您已报名该活动'}, status=400)
+        
+        if activity.signups.count() >= activity.max_participants:
+             return Response({'error': '活动名额已满'}, status=400)
+            
+        signup = ActivitySignup.objects.create(activity=activity, user=user)
+        serializer = ActivitySignupSerializer(signup)
+        return Response(serializer.data, status=201)
+
+    @extend_schema(summary="我的报名记录")
+    @action(detail=False, methods=['get'])
+    def my_signups(self, request):
+        user = get_current_wechat_user(request)
+        if not user:
+            return Response({'error': '请先登录'}, status=401)
+        signups = ActivitySignup.objects.filter(user=user).order_by('-signup_time')
+        serializer = ActivitySignupSerializer(signups, many=True)
+        return Response(serializer.data)
+
+class TopicViewSet(viewsets.ModelViewSet):
+    """
+    技术论坛帖子接口
+    """
+    queryset = Topic.objects.all()
+    serializer_class = TopicSerializer
+
+    def perform_create(self, serializer):
+        user = get_current_wechat_user(self.request)
+        # Auth check is done in create or permission, but here we need user for save
+        if user:
+            serializer.save(author=user)
+    
+    def create(self, request, *args, **kwargs):
+        user = get_current_wechat_user(request)
+        if not user:
+            return Response({'error': '请先登录'}, status=401)
+        return super().create(request, *args, **kwargs)
+
+class ReplyViewSet(viewsets.ModelViewSet):
+    """
+    帖子回复接口
+    """
+    queryset = Reply.objects.all()
+    serializer_class = ReplySerializer
+
+    def perform_create(self, serializer):
+        user = get_current_wechat_user(self.request)
+        if user:
+            serializer.save(author=user)
+
+    def create(self, request, *args, **kwargs):
+        user = get_current_wechat_user(request)
+        if not user:
+            return Response({'error': '请先登录'}, status=401)
+        return super().create(request, *args, **kwargs)
+
+class TopicMediaViewSet(viewsets.GenericViewSet, mixins.CreateModelMixin):
+    """
+    论坛多媒体资源上传接口
+    """
+    queryset = TopicMedia.objects.all()
+    serializer_class = TopicMediaSerializer
+    parser_classes = [parsers.MultiPartParser, parsers.FormParser]
+
+    @extend_schema(summary="上传媒体文件 (返回URL用于Markdown)")
+    def create(self, request, *args, **kwargs):
+        user = get_current_wechat_user(request)
+        if not user:
+            return Response({'error': '请先登录'}, status=401)
+            
+        # 允许上传时不关联 Topic (发帖前上传)，或后续关联
+        # 主要是返回 url
+        return super().create(request, *args, **kwargs)