Adds login class view

bookwyrm/views/__init__.py

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+''' make sure all our nice views are available '''
+from .authentication import LoginView

bookwyrm/views/authentication.py

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+''' class views for login/register/password management views '''
+from django.contrib.auth import authenticate, login
+from django.shortcuts import redirect
+from django.template.response import TemplateResponse
+from django.utils import timezone
+from django.views import View
+
+from bookwyrm import forms
+from bookwyrm.settings import DOMAIN
+
+
+class LoginView(View):
+    ''' authenticate an existing user '''
+    def get(self, request):
+        if request.user.is_authenticated:
+            return redirect('/')
+        # send user to the login page
+        data = {
+            'title': 'Login',
+            'login_form': forms.LoginForm(),
+            'register_form': forms.RegisterForm(),
+        }
+        return TemplateResponse(request, 'login.html', data)
+
+    def post(self, request):
+        login_form = forms.LoginForm(request.POST)
+
+        localname = login_form.data['localname']
+        username = '%s@%s' % (localname, DOMAIN)
+        password = login_form.data['password']
+        user = authenticate(request, username=username, password=password)
+        if user is not None:
+            # successful login
+            login(request, user)
+            user.last_active_date = timezone.now()
+            return redirect(request.GET.get('next', '/'))
+
+        # login errors
+        login_form.non_field_errors = 'Username or password are incorrect'
+        register_form = forms.RegisterForm()
+        data = {
+            'login_form': login_form,
+            'register_form': register_form
+        }
+        return TemplateResponse(request, 'login.html', data)