from rest_framework import viewsets, status, mixins, parsers, filters from django_filters.rest_framework import DjangoFilterBackend from rest_framework.decorators import action from rest_framework.response import Response from rest_framework import serializers, permissions from django.core.signing import TimestampSigner, BadSignature, SignatureExpired from django.utils import timezone from django.db import models from drf_spectacular.utils import extend_schema from shop.models import WeChatUser from .models import Activity, ActivitySignup, Topic, Reply, TopicMedia, Announcement from .serializers import ActivitySerializer, ActivitySignupSerializer, TopicSerializer, ReplySerializer, TopicMediaSerializer, AnnouncementSerializer from .utils import get_current_wechat_user from .permissions import IsAuthorOrReadOnly 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) # Check limit (exclude cancelled) current_count = activity.signups.exclude(status='cancelled').count() if current_count >= activity.max_participants: return Response({'error': '活动名额已满'}, status=400) # Get signup info signup_info = request.data.get('signup_info', {}) # Basic validation # Re-fetch the config from the object method or serializer logic if needed, # but here we can just use the serializer's method to get the effective config. # However, accessing serializer method from view is tricky without instantiating. # Let's replicate the logic or rely on the fact that we can construct it. effective_config = activity.signup_form_config if not effective_config: effective_config = [] if activity.ask_name: effective_config.append({"name": "name", "label": "姓名", "type": "text", "required": True}) if activity.ask_phone: effective_config.append({"name": "phone", "label": "手机号", "type": "number", "required": True}) if activity.ask_wechat: effective_config.append({"name": "wechat", "label": "微信号", "type": "text", "required": True}) if activity.ask_company: effective_config.append({"name": "company", "label": "公司/机构", "type": "text", "required": False}) if effective_config: required_fields = [f['name'] for f in effective_config if f.get('required')] for field in required_fields: # Simple check: field exists and is not empty string (if it's a string) val = signup_info.get(field) if val is None or (isinstance(val, str) and not val.strip()): # Try to find label for better error message label = next((f['label'] for f in effective_config if f['name'] == field), field) return Response({'error': f'请填写: {label}'}, status=400) signup = ActivitySignup.objects.create( activity=activity, user=user, signup_info=signup_info ) 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 permission_classes = [IsAuthorOrReadOnly] filter_backends = [filters.SearchFilter, filters.OrderingFilter, DjangoFilterBackend] search_fields = ['title', 'content'] filterset_fields = ['category', 'is_pinned'] ordering_fields = ['created_at', 'view_count'] ordering = ['-is_pinned', '-created_at'] 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) def retrieve(self, request, *args, **kwargs): instance = self.get_object() instance.view_count += 1 instance.save(update_fields=['view_count']) serializer = self.get_serializer(instance) return Response(serializer.data) class ReplyViewSet(viewsets.ModelViewSet): """ 帖子回复接口 """ queryset = Reply.objects.all() serializer_class = ReplySerializer permission_classes = [IsAuthorOrReadOnly] 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) import requests class TopicMediaViewSet(viewsets.ViewSet): """ 论坛多媒体资源上传接口 (代理到外部OSS服务) """ permission_classes = [] # 内部鉴权 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) file_obj = request.FILES.get('file') if not file_obj: return Response({'error': '未提供文件'}, status=400) # 转发到外部 OSS 上传服务 upload_url = "https://data.tangledup-ai.com/upload?folder=uploads%2Fmarket%2Fforum_image" files = {'file': (file_obj.name, file_obj, file_obj.content_type)} try: # 这里的 headers 不需要 Content-Type，requests 会自动设置 multipart/form-data response = requests.post(upload_url, files=files, timeout=30) if response.status_code == 200: data = response.json() if data.get('success'): # Create TopicMedia record media_type = 'image' if 'image' in file_obj.content_type else 'video' media_obj = TopicMedia.objects.create( file_url=data.get('file_url'), media_type=media_type, # topic will be associated later ) # 返回符合前端预期的格式 return Response({ 'id': media_obj.id, # Return real DB ID 'file': media_obj.file_url, 'media_type': media_obj.media_type, 'created_at': media_obj.created_at }) else: return Response({'error': '外部服务上传失败', 'detail': data}, status=400) else: return Response({'error': f'上传服务响应错误: {response.status_code}', 'detail': response.text}, status=502) except Exception as e: return Response({'error': str(e)}, status=500) class AnnouncementViewSet(viewsets.ReadOnlyModelViewSet): """ 社区公告接口 """ queryset = Announcement.objects.all() serializer_class = AnnouncementSerializer permission_classes = [permissions.AllowAny] def get_queryset(self): now = timezone.now() qs = Announcement.objects.filter(is_active=True) # Filter by start_time (if set, must be <= now) qs = qs.filter(models.Q(start_time__isnull=True) | models.Q(start_time__lte=now)) # Filter by end_time (if set, must be >= now) qs = qs.filter(models.Q(end_time__isnull=True) | models.Q(end_time__gte=now)) return qs.order_by('-is_pinned', '-priority', '-created_at')