From ddfd107a994b7d1fc0c0b67e8593b47f07ad1c32 Mon Sep 17 00:00:00 2001
From: Stefano Pigozzi <me@steffo.eu>
Date: Sat, 7 Aug 2021 03:25:59 +0200
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Implement=20basic=20login=20system?=
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(closes #24) (closes #25)
---
 backend/get_api_token.http | 13 +++++++++++++
 backend/sophon/auth1.py    |  9 +++++++++
 backend/sophon/auth2.py    | 26 ++++++++++++++++++++++++++
 backend/sophon/settings.py |  9 +++++++++
 backend/sophon/urls.py     |  4 +++-
 5 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 backend/get_api_token.http
 create mode 100644 backend/sophon/auth1.py
 create mode 100644 backend/sophon/auth2.py

diff --git a/backend/get_api_token.http b/backend/get_api_token.http
new file mode 100644
index 0000000..250c6ed
--- /dev/null
+++ b/backend/get_api_token.http
@@ -0,0 +1,13 @@
+OPTIONS http://127.0.0.1:30033/api/auth/token/
+
+###
+
+POST http://127.0.0.1:30033/api/auth/token/
+Content-Type: application/json
+
+{
+    "username": "",
+    "password": ""
+}
+
+###
diff --git a/backend/sophon/auth1.py b/backend/sophon/auth1.py
new file mode 100644
index 0000000..6f9e93c
--- /dev/null
+++ b/backend/sophon/auth1.py
@@ -0,0 +1,9 @@
+import rest_framework.authentication
+
+
+class BearerTokenAuthentication(rest_framework.authentication.TokenAuthentication):
+    """
+    A standard implementation of the Token Authentication.
+    """
+
+    keyword = "Bearer"
diff --git a/backend/sophon/auth2.py b/backend/sophon/auth2.py
new file mode 100644
index 0000000..58f4281
--- /dev/null
+++ b/backend/sophon/auth2.py
@@ -0,0 +1,26 @@
+# why is this needed?
+# django somehow import-cycles itself if i put this in auth1
+
+import rest_framework.authtoken.views
+import rest_framework.authtoken.models
+import rest_framework.response
+
+
+class CustomObtainAuthToken(rest_framework.authtoken.views.ObtainAuthToken):
+    def post(self, request, *args, **kwargs):
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        user = serializer.validated_data['user']
+        token, created = rest_framework.authtoken.models.Token.objects.get_or_create(user=user)
+        return rest_framework.response.Response({
+            'token': token.key,
+            'user': {
+                'id': user.pk,
+                'username': user.username,
+                'email': user.email,
+                'first_name': user.first_name,
+                'last_name': user.last_name,
+                'is_staff': user.is_staff,
+                'is_superuser': user.is_superuser,
+            },
+        })
diff --git a/backend/sophon/settings.py b/backend/sophon/settings.py
index 9bba151..4c315c2 100644
--- a/backend/sophon/settings.py
+++ b/backend/sophon/settings.py
@@ -14,6 +14,8 @@ import os
 from pathlib import Path
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
+import rest_framework.authentication
+
 BASE_DIR = Path(__file__).resolve().parent.parent
 
 
@@ -40,6 +42,7 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'django.contrib.postgres',
     'rest_framework',
+    'rest_framework.authtoken',
     'colorfield',
     'sophon.core',  # FIXME: Is .apps.CoreConfig not needed?
 ]
@@ -141,6 +144,7 @@ STATIC_URL = '/static/'
 # Django REST framework
 # https://www.django-rest-framework.org/#example
 
+
 REST_FRAMEWORK = {
     # Use Django's standard `django.contrib.auth` permissions,
     # or allow read-only access for unauthenticated users.
@@ -148,6 +152,11 @@ REST_FRAMEWORK = {
         'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
     ],
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.LimitOffsetPagination',
+    'DEFAULT_AUTHENTICATION_CLASSES': [
+        'rest_framework.authentication.BasicAuthentication',
+        'rest_framework.authentication.SessionAuthentication',
+        'sophon.auth1.BearerTokenAuthentication',
+    ],
     'PAGE_SIZE': 100,
 }
 
diff --git a/backend/sophon/urls.py b/backend/sophon/urls.py
index a363f0d..ad618a1 100644
--- a/backend/sophon/urls.py
+++ b/backend/sophon/urls.py
@@ -15,9 +15,11 @@ Including another URLconf
 """
 from django.contrib import admin
 from django.urls import path, include
+from .auth2 import CustomObtainAuthToken
 
 urlpatterns = [
     path('admin/', admin.site.urls),
-    path('api-auth/', include("rest_framework.urls")),
+    path('api/auth/token/', CustomObtainAuthToken.as_view()),
+    path('api/auth/session/', include("rest_framework.urls")),
     path('api/', include("sophon.core.urls")),
 ]