register: use ModelForm, and print all errors

accounts/views/login.py

@@ -1,31 +1,31 @@
 from django.shortcuts import render
 from django.views import View
-from django.http import HttpResponse
+from django.http import HttpResponse, HttpRequest, JsonResponse
 from django.contrib.auth.models import User
+from django.contrib.auth import authenticate, login
+from django.contrib.auth.decorators import login_required
 from django.db.models.query import QuerySet
 
 from ..status_code import *
-from ..settings import *
 from ..forms.login import LoginForm 
 
 class LoginView(View):
-    def get(self, request):
+    
+    def get(self, request: HttpRequest):
+        if request.user.is_authenticated:
+            logout(request)
         return render(request, "login.html", {"form": LoginForm})
     
-    def post(self, request):
+    def post(self, request: HttpRequest):
+        if request.user.is_authenticated:
+            logout(request)
         form: LoginForm = LoginForm(request.POST)
         if not form.is_valid():
-            return HttpResponse(INVALID_USERNAME_PASSWORD)
+            return JsonResponse(form.errors)
         
-        username: str = form.cleaned_data["username"]
-        password: str = form.cleaned_data["password"]
+        user: User = authenticate(username=form.cleaned_data['username'], password=form.cleaned_data['password'])
+        if user is None:
+            return JsonResponse({'user': [USER_INVALID]})
         
-        query: QuerySet = User.objects.filter(username=username)
-        if (not query.exists()):
-            return HttpResponse(INVALID_USERNAME_PASSWORD)
-        
-        user: User = User.objects.get(username=username)
-        if (not user.check_password(password)):
-            return HttpResponse(INVALID_USERNAME_PASSWORD)
-        
-        return HttpResponse(USER_VALID)
+        login(request, user)
+        return HttpResponse(USER_LOGGED)