register: use ModelForm, and print all errors

accounts/views/register.py

@@ -1,29 +1,32 @@
 from django.shortcuts import render
 from django.views import View
-from django.http import HttpResponse, HttpRequest
+from django.http import HttpResponse, HttpRequest, JsonResponse
 from django.contrib.auth.models import User
+from django.contrib.auth import authenticate, login, logout
 from django.db.models.query import QuerySet
+from django.contrib.auth.decorators import user_passes_test
 
 from ..status_code import *
-from ..settings import *
 from ..forms.register import RegisterForm
 
+
 class RegisterView(View):
+    
     def get(self, request: HttpRequest):
-        return render(request, "register.html", {"form": RegisterForm}) 
+        if request.user.is_authenticated:
+            logout(request)
+        return render(request, 'register.html', {'form': RegisterForm})
 
     def post(self, request: HttpRequest):
+        if request.user.is_authenticated:
+            logout(request)
+
         form: RegisterForm = RegisterForm(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 = User.objects.create_user(username=form.cleaned_data['username'], password=form.cleaned_data['password'])
         
-        if User.objects.filter(username=username).exists():
-            return HttpResponse(USERNAME_ALREADY_USED)
-        
-        user: User = User.objects.create_user(username, password=password)
-        user.save()
+        login(request, user)
         
         return HttpResponse(USER_ADDED)