Shows errors for login/register forms

bookwyrm/templates/login.html

@@ -5,6 +5,9 @@
     <div class="column">
         <div class="box">
             <h2 class="title">Log in</h2>
+            {% if login_form.non_field_errors %}
+            <p class="notification is-danger">{{ login_form.non_field_errors }}</p>
+            {% endif %}
             <form name="login" method="post" action="/user-login">
                 {% csrf_token %}
                 <div class="field">
@@ -12,12 +15,18 @@
                     <div class="control">
                         {{ login_form.username }}
                     </div>
+                    {% for error in login_form.username.errors %}
+                    <p class="help is-danger">{{ error | escape }}</p>
+                    {% endfor %}
                 </div>
                 <div class="field">
                     <label class="label" for="id_password">Password:</label>
                     <div class="control">
                         {{ login_form.password }}
                     </div>
+                    {% for error in login_form.password.errors %}
+                    <p class="help is-danger">{{ error | escape }}</p>
+                    {% endfor %}
                 </div>
                 <div class="field is-grouped">
                     <div class="control">

bookwyrm/templates/snippets/register_form.html

@@ -2,19 +2,28 @@
 <div class="field">
     <label class="label" for="id_username_register">Username:</label>
     <div class="control">
-        <input type="text" name="username" maxlength="150" class="input" required="" id="id_username_register">
+        <input type="text" name="username" maxlength="150" class="input" required="" id="id_username_register" value="{% if register_form.username.value %}{{ register_form.username.value }} {% endif %}">
     </div>
+    {% for error in register_form.username.errors %}
+    <p class="help is-danger">{{ error | escape }}</p>
+    {% endfor %}
 </div>
 <div class="field">
     <label class="label" for="id_email_register">Email address:</label>
     <div class="control">
-        <input type="email" name="email" maxlength="254" class="input" id="id_email_register">
+        <input type="email" name="email" maxlength="254" class="input" id="id_email_register" value="{% if register_form.email.value %}{{ register_form.email.value }}{% endif %}">
+    {% for error in register_form.email.errors %}
+    <p class="help is-danger">{{ error | escape }}</p>
+    {% endfor %}
     </div>
 </div>
 <div class="field">
     <label class="label" for="id_password_register">Password:</label>
     <div class="control">
         <input type="password" name="password" maxlength="128" class="input" required="" id="id_password_register">
+    {% for error in register_form.password.errors %}
+    <p class="help is-danger">{{ error | escape }}</p>
+    {% endfor %}
     </div>
 </div>
 <div class="field is-grouped">

bookwyrm/view_actions.py

@@ -23,14 +23,15 @@ def user_login(request):
     if request.method == 'GET':
         return redirect('/login')
 
-    register_form = forms.RegisterForm()
     login_form = forms.LoginForm(request.POST)
+    register_form = forms.RegisterForm()
     if not login_form.is_valid():
-        return TemplateResponse(
-            request,
-            'login.html',
-            {'login_form': login_form, 'register_form': register_form}
-        )
+        data = {
+            'site_settings': models.SiteSettings.get(),
+            'login_form': login_form,
+            'register_form': register_form
+        }
+        return TemplateResponse(request, 'login.html', data)
 
     username = login_form.data['username']
     username = '%s@%s' % (username, DOMAIN)
@@ -39,7 +40,14 @@ def user_login(request):
     if user is not None:
         login(request, user)
         return redirect(request.GET.get('next', '/'))
-    return redirect('/login')
+
+    login_form.non_field_errors = 'Username or password are incorrect'
+    data = {
+        'site_settings': models.SiteSettings.get(),
+        'login_form': login_form,
+        'register_form': register_form
+    }
+    return TemplateResponse(request, 'login.html', data)
 
 
 def register(request):
@@ -61,13 +69,27 @@ def register(request):
         invite = None
 
     form = forms.RegisterForm(request.POST)
+    errors = False
     if not form.is_valid():
-        return redirect('/register/')
+        errors = True
 
     username = form.data['username']
     email = form.data['email']
     password = form.data['password']
 
+    # check username and email uniqueness
+    if models.User.objects.filter(localname=username).first():
+        form.add_error('username', 'User with this username already exists')
+        errors = True
+
+    if errors:
+        data = {
+            'site_settings': models.SiteSettings.get(),
+            'login_form': forms.LoginForm(),
+            'register_form': form
+        }
+        return TemplateResponse(request, 'login.html', data)
+
     user = models.User.objects.create_user(username, email, password)
     if invite:
         invite.times_used += 1