All Tasks Completed

api/admin.py

@@ -1,4 +1,4 @@
 from django.contrib import admin
-from .models import Todo
+from .models import *
 
 admin.site.register(Todo)

api/migrations/0003_todo_collaborator.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.7 on 2021-08-07 14:32
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('api', '0002_todo_creator'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='todo',
+            name='collaborator',
+            field=models.ManyToManyField(related_name='task_collaborator', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

api/migrations/0004_auto_20210807_2213.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.7 on 2021-08-07 16:43
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('api', '0003_todo_collaborator'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='todo',
+            name='collaborator',
+            field=models.ManyToManyField(related_name='collaborator', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

api/models.py

@@ -1,10 +1,13 @@
 from django.db import models
 from django.contrib.auth.models import User
+from django.conf import settings
+from django.db.models.deletion import CASCADE
 
 
 class Todo(models.Model):
     creator = models.ForeignKey(User, on_delete=models.CASCADE)
     title = models.CharField(max_length=255)
+    collaborator = models.ManyToManyField(User,related_name='collaborator')
 
     def __str__(self):
         return self.title

api/serializers.py

@@ -1,5 +1,5 @@
 from rest_framework import serializers
-from .models import Todo
+from .models import *
 
 
 """
@@ -23,7 +23,28 @@ def save(self, **kwargs):
         user = self.context['request'].user
         title = data['title']
         todo = Todo.objects.create(creator=user, title=title)
+        content = {
+            "id" : todo.id,
+            "title" : title
+        }
+        return content
 
     class Meta:
         model = Todo
         fields = ('id', 'title',)
+
+class TodoSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Todo
+        fields = ('id', 'title')
+
+class CollaboratorSerializer(serializers.ModelSerializer):
+
+    collaborator_username = serializers.CharField(required=True, max_length=255)
+
+    class Meta:
+        model = Todo
+        fields = ('id','collaborator_username')
+
+

api/urls.py

@@ -1,5 +1,5 @@
 from django.urls import path
-from .views import TodoCreateView
+from .views import *
 
 """
 TODO:
@@ -9,4 +9,8 @@
 
 urlpatterns = [
     path('todo/create/', TodoCreateView.as_view()),
+    path('todo/<int:id>/', TodoCrudView.as_view()),
+    path('todo/', TodoListView.as_view()),
+    path('todo/<int:id>/add-collaborators/', AddCollaboratorView.as_view()),
+    path('todo/<int:id>/remove-collaborators/', RemoveCollaboratorView.as_view()),
 ]

api/views.py

@@ -1,9 +1,15 @@
+from django.http.response import Http404, HttpResponse
+from django.views.decorators.csrf import csrf_exempt
 from rest_framework import generics
 from rest_framework import permissions
 from rest_framework import status
 from rest_framework.response import Response
-from .serializers import TodoCreateSerializer
+from rest_framework.parsers import JSONParser 
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.permissions import IsAuthenticated
+from .serializers import *
 from .models import Todo
+from django.contrib.auth.models import User
 
 
 """
@@ -31,5 +37,146 @@ def post(self, request):
         """
         serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
-        serializer.save()
-        return Response(status=status.HTTP_200_OK)
+        response = serializer.save()
+        return Response(response,status=status.HTTP_200_OK)
+
+class TodoListView(generics.GenericAPIView):
+    permission_classes = (permissions.IsAuthenticated, )
+    serializer_class = TodoSerializer
+
+    def get(self, request):
+        task1 = Todo.objects.filter(creator=request.user)
+        task2 = Todo.objects.filter(collaborator=request.user)
+        serializer1 = self.get_serializer(task1, many = True)
+        serializer2 = self.get_serializer(task2, many = True)
+        response = []
+        for t in serializer1.data:
+            response.append(t)
+        for x in serializer2.data:
+            task = Todo.objects.get(id = x['id'])
+            response.append({'id' : task.id , 'title' : task.title , 'Todo_creator' : task.creator.username})
+
+        return Response(response, status = status.HTTP_200_OK)
+
+class TodoCrudView(generics.GenericAPIView):
+
+    permission_classes = (permissions.IsAuthenticated, )
+    serializer_class = TodoSerializer
+
+    def get(self,request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+        if request.user == task.creator:
+            serializer = self.get_serializer(task,many = False)
+            return Response(serializer.data,status=status.HTTP_200_OK)
+        elif request.user in task.collaborator.all():
+            serializer = self.get_serializer(task,many = False) 
+            response = []
+            response.append({'id' : task.id , 'title' : task.title , 'Todo_creator' : task.creator.username})
+            return Response(response, status = status.HTTP_200_OK)
+        else:
+            return Response("You are not allowed to get this task",status=status.HTTP_404_NOT_FOUND)
+
+    def put(self, request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+        if request.user==task.creator or request.user in task.collaborator.all():
+            serializer = self.get_serializer(task,many=False, data=request.data)
+            if serializer.is_valid():
+                serializer.save()
+            return Response(serializer.data,status=status.HTTP_200_OK)
+        else:
+            return Response("You cannot edit this task",status=status.HTTP_404_NOT_FOUND)
+
+    def patch(self, request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+        if request.user==task.creator or request.user in task.collaborator.all():
+            serializer = self.get_serializer(task,many=False, data=request.data, partial = True)
+            if serializer.is_valid():
+                serializer.save()
+            return Response(serializer.data,status=status.HTTP_200_OK)
+        else:
+            return Response("You cannot edit this task",status=status.HTTP_404_NOT_FOUND)
+
+    def delete(self,request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+        if request.user==task.creator or request.user in task.collaborator.all():
+            task.delete()
+            return Response(status=status.HTTP_204_NO_CONTENT)   
+        else:
+            return Response("You cannot delete this task",status=status.HTTP_404_NOT_FOUND)   
+
+class AddCollaboratorView(generics.GenericAPIView):
+    permission_classes = (permissions.IsAuthenticated, )
+    serializer_class = CollaboratorSerializer
+
+    def post(self,request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+
+        if task.creator == request.user:
+            try:
+                user = User.objects.get(username=request.data.get('collaborator_username'))
+                if user in task.collaborator.all():
+                    return Response("This user is already a Collaborator in this task",status=status.HTTP_404_NOT_FOUND)
+                elif user==task.creator:
+                    return Response("You are already creator of this Task",status=status.HTTP_404_NOT_FOUND)
+                else:
+                    task.collaborator.add(user)
+                    task.save()
+                    return Response("Collaborator Added Successfully",status=status.HTTP_200_OK) 
+            except User.DoesNotExist:
+                msg = ('User with this username does not exist')
+                raise serializers.ValidationError(msg, code='todo')  
+        else:
+            msg = ('You are not the creator of this task')
+            raise serializers.ValidationError(msg, code='todo')
+
+class RemoveCollaboratorView(generics.GenericAPIView):
+    permission_classes = (permissions.IsAuthenticated, )
+    serializer_class = CollaboratorSerializer
+
+    def put(self,request,id):
+        try:
+            task = Todo.objects.get(id = id)
+        except Todo.DoesNotExist:
+            msg = ('Task with this Id does not exist')
+            raise serializers.ValidationError(msg, code='todo')
+
+        if task.creator == request.user:
+            try:
+                user = User.objects.get(username=request.data.get('collaborator_username'))
+                if user in task.collaborator.all():
+                    task.collaborator.remove(user)
+                    task.save()
+                    return Response("Collaborator Removed Successfully",status=status.HTTP_200_OK) 
+                elif user==task.creator:
+                    return Response("You are already creator of this Task",status=status.HTTP_404_NOT_FOUND)
+                else:
+                    return Response("This user is not a Collaborator of this task",status=status.HTTP_404_NOT_FOUND)
+
+            except User.DoesNotExist:
+                msg = ('User with this username does not exist')
+                raise serializers.ValidationError(msg, code='todo')  
+        else:
+            msg = ('You are not the creator of this task')
+            raise serializers.ValidationError(msg, code='todo')
+
+

authentication/serializers.py

@@ -7,17 +7,38 @@ class TokenSerializer(serializers.Serializer):
     token = serializers.CharField(max_length=500)
 
 
-class LoginSerializer(serializers.Serializer):
+class LoginSerializer(serializers.ModelSerializer):
     # TODO: Implement login functionality
-    pass
+    class Meta:
+        model = User
+        fields = ('username', 'password')
 
 
-class RegisterSerializer(serializers.Serializer):
+class RegisterSerializer(serializers.ModelSerializer):
     # TODO: Implement register functionality
-    pass
+    class Meta:
+        model = User
+        fields = ('first_name', 'email', 'username', 'password')
+
+
+    def create(self, validated_data):
+        if User.objects.filter(email=validated_data['email']).exists():
+            msg = ('Email Id already exists')
+            raise serializers.ValidationError(msg, code='authentication')
+        user = User.objects.create(
+            username=validated_data['username'],
+            email=validated_data['email'],
+            first_name=validated_data['first_name'],
+        )
+        user.set_password(validated_data['password'])
+        user.save()
+
+        return user
 
 
 class UserSerializer(serializers.ModelSerializer):
     # TODO: Implement the functionality to display user details
-    pass
+    class Meta:
+        model = User
+        fields = ('id', 'first_name', 'email', 'username')
 

authentication/views.py

@@ -1,8 +1,11 @@
-from rest_framework import permissions
+from rest_framework import permissions, serializers
 from rest_framework import generics
 from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.authtoken.models import Token
+from django.contrib.auth.models import User
+from rest_framework.authtoken.views import ObtainAuthToken
+from django.contrib.auth import authenticate
 from .serializers import (
     LoginSerializer, RegisterSerializer, UserSerializer, TokenSerializer)
 
@@ -21,16 +24,38 @@ class LoginView(generics.GenericAPIView):
     Implement login functionality, taking username and password
     as input, and returning the Token.
     """
-    pass
+    serializer_class = LoginSerializer
 
+    def post(self,request):
+        username = request.data.get("username")
+        password = request.data.get("password")
+        if username is None or password is None:
+            return Response({'error': 'Please provide both username and password'},
+                        status=400)
+
+        user = authenticate(username=username, password=password)
+        if not user:
+            return Response({'error': 'Invalid Credentials'},
+                        status=404)    
+        token, _ = Token.objects.get_or_create(user=user)
+        return Response({'token': token.key})
 
 class RegisterView(generics.GenericAPIView):
     """
     TODO:
     Implement register functionality, registering the user by
     taking his details, and returning the Token.
     """
-    pass
+    serializer_class = RegisterSerializer
+
+    def post(self, request):
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        token, created = Token.objects.get_or_create(user=serializer.instance)
+        return Response({
+            "token" : token.key
+        })
 
 
 class UserProfileView(generics.RetrieveAPIView):
@@ -39,4 +64,10 @@ class UserProfileView(generics.RetrieveAPIView):
     Implement the functionality to retrieve the details
     of the logged in user.
     """
-    pass
+    permission_classes = (permissions.IsAuthenticated, )
+    serializer_class = UserSerializer
+
+    def get(self, request):
+        user = User.objects.get(username=self.request.user.username)
+        serializer = self.get_serializer(user)
+        return Response(serializer.data)