feature(matching): Add mathing friends list API

app/views/router.py

@@ -1,15 +1,24 @@
 from rest_framework import routers
 
 from app.views.viewsets import UserViewSet, UserProfileViewSet
+from app.views.viewsets.matching import MatchingViewSet
 
 router = routers.DefaultRouter()
 
 router.register(
     prefix=r'users',
     viewset=UserViewSet,
+    basename='users',
 )
 
 router.register(
     prefix=r'user_profiles',
     viewset=UserProfileViewSet,
+    basename='user_profiles',
+)
+
+router.register(
+    prefix=r'matching',
+    viewset=MatchingViewSet,
+    basename='matching',
 )

app/views/viewsets/matching.py

@@ -0,0 +1,25 @@
+from django.core.paginator import Paginator
+
+from app.models import FriendDecision
+from rest_framework import viewsets, permissions, mixins
+
+from app.models.user_profile import UserProfile
+from app.serializers.user_profile import UserProfileSerializer
+
+
+class MatchingViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
+    # user proflie의 사용자 중 decisions table을 조회해서 내가 sender도 receiver도 아닌 사용자들 찾아옴
+    # user id가 FriendDecision의 sender와 receiver에 없는 경우
+    queryset = UserProfile.objects.all()
+    serializer_class = UserProfileSerializer
+    permission_classes = (
+        permissions.IsAuthenticated,
+    )
+
+    def filter_queryset(self, queryset):
+        received_friend = FriendDecision.objects.filter(receiver_id=self.request.user.id).values_list('sender_id', flat=True)
+        sent_friend = FriendDecision.objects.filter(sender_id=self.request.user.id).values_list('receiver_id', flat=True)
+
+        excludes = [self.request.user.id, *received_friend, *sent_friend]
+        queryset = queryset.exclude(user_id__in=excludes)
+        return queryset