Solution

cinema/permissions.py

@@ -0,0 +1,16 @@
+from rest_framework.permissions import BasePermission, SAFE_METHODS
+
+
+class IsAdminOrIfAuthenticatedReadOnly(BasePermission):
+    """
+    The request is authenticated as an admin - read/write,
+    if as a user - read only request.
+    """
+    def has_permission(self, request, view):
+        return bool(
+            request.method in SAFE_METHODS
+            and request.user
+            and request.user.is_authenticated
+        ) or (
+            request.user and request.user.is_staff
+        )

cinema/views.py

@@ -1,10 +1,13 @@
 from datetime import datetime
 
 from django.db.models import F, Count
-from rest_framework import viewsets
+from rest_framework import viewsets, mixins
+from rest_framework.authentication import TokenAuthentication
 from rest_framework.pagination import PageNumberPagination
+from rest_framework.permissions import IsAuthenticated
 
 from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession, Order
+from cinema.permissions import IsAdminOrIfAuthenticatedReadOnly
 
 from cinema.serializers import (
     GenreSerializer,
@@ -21,24 +24,49 @@
 )
 
 
-class GenreViewSet(viewsets.ModelViewSet):
+class GenreViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin
+):
     queryset = Genre.objects.all()
     serializer_class = GenreSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class ActorViewSet(viewsets.ModelViewSet):
+class ActorViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin
+):
     queryset = Actor.objects.all()
     serializer_class = ActorSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class CinemaHallViewSet(viewsets.ModelViewSet):
+class CinemaHallViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin
+):
     queryset = CinemaHall.objects.all()
     serializer_class = CinemaHallSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class MovieViewSet(viewsets.ModelViewSet):
+class MovieViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin,
+    mixins.RetrieveModelMixin
+):
     queryset = Movie.objects.prefetch_related("genres", "actors")
     serializer_class = MovieSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
     @staticmethod
     def _params_to_ints(qs):
@@ -76,7 +104,14 @@ def get_serializer_class(self):
         return MovieSerializer
 
 
-class MovieSessionViewSet(viewsets.ModelViewSet):
+class MovieSessionViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.RetrieveModelMixin,
+    mixins.CreateModelMixin,
+    mixins.UpdateModelMixin,
+    mixins.DestroyModelMixin
+):
     queryset = (
         MovieSession.objects.all()
         .select_related("movie", "cinema_hall")
@@ -87,6 +122,8 @@ class MovieSessionViewSet(viewsets.ModelViewSet):
         )
     )
     serializer_class = MovieSessionSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
     def get_queryset(self):
         date = self.request.query_params.get("date")
@@ -118,12 +155,18 @@ class OrderPagination(PageNumberPagination):
     max_page_size = 100
 
 
-class OrderViewSet(viewsets.ModelViewSet):
+class OrderViewSet(
+    viewsets.GenericViewSet,
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin
+):
     queryset = Order.objects.prefetch_related(
         "tickets__movie_session__movie", "tickets__movie_session__cinema_hall"
     )
     serializer_class = OrderSerializer
     pagination_class = OrderPagination
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAuthenticated,)
 
     def get_queryset(self):
         return Order.objects.filter(user=self.request.user)

cinema_service/settings.py

@@ -125,7 +125,7 @@
 
 USE_I18N = True
 
-USE_TZ = False
+USE_TZ = True
 
 
 # Static files (CSS, JavaScript, Images)

cinema_service/urls.py

@@ -4,5 +4,6 @@
 urlpatterns = [
     path("admin/", admin.site.urls),
     path("api/cinema/", include("cinema.urls", namespace="cinema")),
+    path("api/user/", include("user.urls", namespace="user")),
     path("__debug__/", include("debug_toolbar.urls")),
 ]

user/serializers.py

@@ -1 +1,32 @@
-# write your code here
+from django.contrib.auth import get_user_model
+from rest_framework import serializers
+
+
+class UserSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = get_user_model()
+        fields = ("id", "username", "email", "password", "is_staff", )
+        read_only_fields = ("id", "is_staff", )
+        extra_kwargs = {
+            "password": {"write_only": True, "min_length": 5}
+        }
+
+    def create(self, validated_data):
+        """
+        Create user with encrypted password
+        """
+        return get_user_model().objects.create_user(**validated_data)
+
+    def update(self, instance, validated_data):
+        """
+        Update User with encrypted password.
+        """
+        password = validated_data.pop("password", None)
+        user = super().update(instance, validated_data)
+
+        if password:
+            user.set_password(password)
+            user.save()
+
+        return user

user/urls.py

@@ -1 +1,10 @@
-# write your code here
+from django.urls import path
+from user.views import CreateUserView, LoginUserView, ManageUserView
+
+urlpatterns = [
+    path("login/", LoginUserView.as_view(), name="login"),
+    path("register/", CreateUserView.as_view(), name="create"),
+    path("me/", ManageUserView.as_view(), name="manage"),
+]
+
+app_name = "user"

user/views.py

@@ -1 +1,24 @@
-# write your code here
+from rest_framework import generics
+from rest_framework.authentication import TokenAuthentication
+from rest_framework.authtoken.views import ObtainAuthToken
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.settings import api_settings
+
+from user.serializers import UserSerializer
+
+
+class CreateUserView(generics.CreateAPIView):
+    serializer_class = UserSerializer
+
+
+class LoginUserView(ObtainAuthToken):
+    renderer_classes = api_settings.DEFAULT_RENDERER_CLASSES
+
+
+class ManageUserView(generics.RetrieveUpdateAPIView):
+    serializer_class = UserSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAuthenticated,)
+
+    def get_object(self):
+        return self.request.user