Support: update contact information via Front webhook

readthedocs/settings/base.py

@@ -67,6 +67,8 @@ class CommunityBaseSettings(Settings):
     SERVER_EMAIL = DEFAULT_FROM_EMAIL
     SUPPORT_EMAIL = None
     SUPPORT_FORM_ENDPOINT = None
+    FRONT_TOKEN = None
+    FRONT_API_SECRET = None
 
     # Sessions
     SESSION_COOKIE_DOMAIN = 'readthedocs.org'
@@ -623,6 +625,7 @@ def DOCKER_LIMITS(self):
     DEFAULT_VERSION_PRIVACY_LEVEL = 'public'
     GROK_API_HOST = 'https://api.grokthedocs.com'
     ALLOW_ADMIN = True
+    ADMIN_URL = None
     RTD_ALLOW_ORGANIZATIONS = False
 
     # Elasticsearch settings.

readthedocs/support/front.py

@@ -0,0 +1,31 @@
+"""Front's API client."""
+
+import requests
+
+
+class FrontClient:
+
+    """Wrapper around Front's API."""
+
+    BASE_URL = 'https://api2.frontapp.com'
+
+    def __init__(self, token):
+        self.token = token
+
+    @property
+    def _headers(self):
+        headers = {
+            "Authorization": f"Bearer {self.token}",
+        }
+        return headers
+
+    def _get_url(self, path):
+        return f'{self.BASE_URL}{path}'
+
+    def get(self, path, **kwargs):
+        kwargs.setdefault('headers', {}).update(self._headers)
+        return requests.get(self._get_url(path), **kwargs)
+
+    def patch(self, path, **kwargs):
+        kwargs.setdefault('headers', {}).update(self._headers)
+        return requests.patch(self._get_url(path), **kwargs)

readthedocs/support/tests/test_views.py

@@ -0,0 +1,104 @@
+from unittest import mock
+
+import requests_mock
+from django.contrib.auth.models import User
+from django.test import TestCase, override_settings
+from django.urls import reverse
+from django_dynamic_fixture import get
+
+from readthedocs.support.views import FrontWebhookBase
+
+
+@override_settings(
+    ADMIN_URL='https://readthedocs.org/admin',
+    FRONT_API_SECRET='1234',
+)
+class TestFrontWebhook(TestCase):
+
+    def setUp(self):
+        self.user = get(User, email='test@example.com', username='test')
+        self.url = reverse('front_webhook')
+
+    def test_invalid_payload(self):
+        resp = self.client.post(
+            self.url,
+            data={'foo': 'bar'},
+            content_type='application/json',
+        )
+        self.assertEqual(resp.status_code, 400)
+        self.assertEqual(resp.data['detail'], 'Invalid payload')
+
+    @mock.patch.object(FrontWebhookBase, '_is_payload_valid')
+    def test_invalid_event(self, is_payload_valid):
+        is_payload_valid.return_value = True
+        resp = self.client.post(
+            self.url,
+            data={'type': 'outbound'},
+            content_type='application/json',
+        )
+        self.assertEqual(resp.status_code, 200)
+        self.assertEqual(resp.data['detail'], 'Skipping outbound event')
+
+    @requests_mock.Mocker(kw='mock_request')
+    @mock.patch.object(FrontWebhookBase, '_is_payload_valid')
+    def test_inbound_event(self, is_payload_valid, mock_request):
+        is_payload_valid.return_value = True
+        self._mock_request(mock_request)
+        resp = self.client.post(
+            self.url,
+            data={
+                'type': 'inbound',
+                'conversation': {'id': 'cnv_123'}
+            },
+            content_type='application/json',
+        )
+        self.assertEqual(resp.status_code, 200)
+        self.assertEqual(resp.data['detail'], 'User updated test@example.com')
+        last_request = mock_request.last_request
+        self.assertEqual(last_request.method, 'PATCH')
+        # Existing custom fields are left unchanged.
+        custom_fields = last_request.json()['custom_fields']
+        for field in ['com:dont-change', 'org:dont-change', 'ads:dont-change']:
+            self.assertEqual(custom_fields[field], 'Do not change this')
+
+    @requests_mock.Mocker(kw='mock_request')
+    @mock.patch.object(FrontWebhookBase, '_is_payload_valid')
+    def test_inbound_event_unknow_email(self, is_payload_valid, mock_request):
+        self.user.email = 'unknown@example.com'
+        self.user.save()
+        is_payload_valid.return_value = True
+        self._mock_request(mock_request)
+        resp = self.client.post(
+            self.url,
+            data={
+                'type': 'inbound',
+                'conversation': {'id': 'cnv_123'}
+            },
+            content_type='application/json',
+        )
+        self.assertEqual(resp.status_code, 200)
+        self.assertEqual(
+            resp.data['detail'],
+            'User with email test@example.com not found in our database',
+        )
+
+    def _mock_request(self, mock_request):
+        mock_request.get(
+            'https://api2.frontapp.com/conversations/cnv_123',
+            json={
+                'recipient': {
+                    'handle': 'test@example.com',
+                },
+            },
+        )
+        mock_request.get(
+            'https://api2.frontapp.com/contacts/alt:email:test@example.com',
+            json={
+                'custom_fields': {
+                    'org:dont-change': 'Do not change this',
+                    'com:dont-change': 'Do not change this',
+                    'ads:dont-change': 'Do not change this',
+                },
+            },
+        )
+        mock_request.patch('https://api2.frontapp.com/contacts/alt:email:test@example.com')

readthedocs/support/urls.py

@@ -0,0 +1,7 @@
+from django.conf.urls import url
+
+from readthedocs.support.views import FrontWebhook
+
+urlpatterns = [
+    url(r'^front-webhook/$', FrontWebhook.as_view(), name='front_webhook'),
+]

readthedocs/support/views.py

@@ -0,0 +1,144 @@
+"""Support views."""
+
+import base64
+import hashlib
+import hmac
+import logging
+
+from django.conf import settings
+from django.contrib.auth.models import User
+from django.db.models import Q
+from rest_framework.response import Response
+from rest_framework.status import (
+    HTTP_400_BAD_REQUEST,
+    HTTP_500_INTERNAL_SERVER_ERROR,
+)
+from rest_framework.views import APIView
+
+from readthedocs.core.utils.extend import SettingsOverrideObject
+from readthedocs.support.front import FrontClient
+
+log = logging.getLogger(__name__)
+
+
+class FrontWebhookBase(APIView):
+
+    """
+    Front's webhook handler.
+
+    Currently we only listen to inbound messages events.
+    Contact information is updated when a new message is received.
+
+    See https://dev.frontapp.com/docs/webhooks-1.
+    """
+
+    http_method_names = ['post']
+
+    def post(self, request):
+        if not self._is_payload_valid():
+            return Response(
+                {'detail': 'Invalid payload'},
+                status=HTTP_400_BAD_REQUEST,
+            )
+
+        event = request.data.get('type')
+        if event == 'inbound':
+            return self._update_contact_information(request.data)
+        return Response({'detail': f'Skipping {event} event'})
+
+    def _update_contact_information(self, data):
+        """
+        Update contact information using Front's API.
+
+        The webhook event give us the conversation_id,
+        we use that to
+        """
+        client = FrontClient(token=settings.FRONT_TOKEN)
+
+        # Retrieve the user from the email from the conversation.
+        conversation_id = data.get('conversation', {}).get('id')
+        try:
+            resp = client.get(f'/conversations/{conversation_id}').json()
+            email = resp.get('recipient', {}).get('handle')
+        except Exception:  # noqa
+            msg = f'Error while getting conversation {conversation_id}'
+            log.exception(msg)
+            return Response({'detail': msg}, status=HTTP_500_INTERNAL_SERVER_ERROR)
+
+        user = (
+            User.objects
+            .filter(Q(email=email) | Q(emailaddress__email=email))
+            .first()
+        )
+        if not user:
+            return Response({'detail': f'User with email {email} not found in our database'})
+
+        # Get current custom fields, and update them.
+        try:
+            resp = client.get(f'/contacts/alt:email:{email}').json()
+        except Exception:  # noqa
+            msg = f'Error while getting contact {email}'
+            log.exception(msg)
+            return Response({'detail': msg}, HTTP_500_INTERNAL_SERVER_ERROR)
+
+        new_custom_fields = self._get_custom_fields(user)
+        custom_fields = resp.get('custom_fields', {})
+        custom_fields.update(new_custom_fields)
+
+        try:
+            client.patch(
+                f'/contacts/alt:email:{email}',
+                json={'custom_fields': custom_fields}
+            )
+        except Exception:  # noqa
+            msg = f'Error while updating contact information for {email}'
+            log.exception(msg)
+            return Response(
+                {
+                    'detail': msg,
+                    'custom_fields': new_custom_fields,
+                },
+                status=HTTP_500_INTERNAL_SERVER_ERROR,
+            )
+        else:
+            return Response({
+                'detail': f'User updated {email}',
+                'custom_fields': new_custom_fields,
+            })
+
+    # pylint: disable=no-self-use
+    def _get_custom_fields(self, user):
+        """
+        Attach custom fields for this user.
+
+        These fields need to be created on Front (settings -> Contacts -> Custom Fields).
+        """
+        custom_fields = {}
+        custom_fields['org:username'] = user.username
+        custom_fields['org:admin'] = f'{settings.ADMIN_URL}/auth/user/{user.pk}/change'
+        return custom_fields
+
+    def _is_payload_valid(self):
+        """
+        Check if the signature and the payload from the webhook matches.
+
+        https://dev.frontapp.com/docs/webhooks-1#validating-data-integrity
+        """
+        digest = self._get_digest()
+        signature = self.request.headers.get('X-Front-Signature', '')
+        result = hmac.compare_digest(digest, signature.encode())
+        return result
+
+    def _get_digest(self):
+        """Get a HMAC digest of the request using Front's API secret."""
+        secret = settings.FRONT_API_SECRET
+        digest = hmac.new(
+            secret.encode(),
+            msg=self.request.body,
+            digestmod=hashlib.sha1,
+        )
+        return base64.b64encode(digest.digest())
+
+
+class FrontWebhook(SettingsOverrideObject):
+    _default_class = FrontWebhookBase

readthedocs/templates/support/index.html

@@ -120,14 +120,6 @@ <h2 id="user-support">User Support</h2>
         {% endif %}
   </div>
 
-
-  {% if request.user.is_authenticated %}
-  <input type="hidden" name="username" value="{{ request.user.username }}">
-  <input type="hidden" name="pk" value="{{ request.user.pk }}">
-  {% else %}
-  <input type="hidden" name="auth" value="Unknown">
-  {% endif %}
-
   <input type="hidden" name="subject" value="Community Support Request">
 
   <input type="submit" value="Submit support request">

readthedocs/urls.py

@@ -34,6 +34,7 @@
     url(r'^support/error/$',
         TemplateView.as_view(template_name='support/error.html'),
         name='support_error'),
+    url(r'^support/', include('readthedocs.support.urls')),
 ]
 
 rtd_urls = [