integrations: Add webhook payloads, webhook code, API endpoint, and tests for heroku

zerver/fixtures/heroku/heroku_deploy.txt

@@ -0,0 +1 @@
+app=sample-project&app_uuid=f46ffea9-d6be-4293-ae6e-4449fa5ae29a&user=user%40example.com&url=http%3A%2F%2Fsample-project.herokuapp.com&head=3eb5f44&head_long=3eb5f447a2f6bcf254e63fbf2426b8e6738608eb&prev_head=32d184c097b04182483999046e91c32328c07562&git_log=%20%20*%20Example%20User%3A%20Test%20commit%20for%20Deploy%20Hook%202&release=v9

zerver/lib/integrations.py

@@ -117,6 +117,7 @@ WEBHOOK_INTEGRATIONS = [
     ),
     WebhookIntegration('gitlab', display_name='GitLab'),
     WebhookIntegration('helloworld', display_name='Hello World'),
+    WebhookIntegration('heroku', display_name='Heroku'),
     WebhookIntegration('ifttt', function='zerver.views.webhooks.ifttt.api_iftt_app_webhook', display_name='IFTTT'),
     WebhookIntegration('jira', secondary_line_text='(hosted or v5.2+)', display_name='JIRA'),
     WebhookIntegration('librato'),

zerver/tests/webhooks/test_heroku.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from typing import Text
+from zerver.lib.test_classes import WebhookTestCase
+
+class HerokuHookTests(WebhookTestCase):
+    STREAM_NAME = 'heroku'
+    URL_TEMPLATE = u"/api/v1/external/heroku?stream={stream}&api_key={api_key}"
+
+    def test_deployment(self):
+        # type: () -> None
+        expected_subject = "sample-project"
+        expected_message = u"""user@example.com deployed version 3eb5f44 of \
+[sample-project](http://sample-project.herokuapp.com)
+>   * Example User: Test commit for Deploy Hook 2"""
+        self.send_and_test_stream_message('deploy', expected_subject, expected_message,
+                                          content_type="application/x-www-form-urlencoded")
+
+    def get_body(self, fixture_name):
+        # type: (Text) -> Text
+        return self.fixture_data("heroku", fixture_name, file_type="txt")

zerver/views/webhooks/heroku.py

@@ -0,0 +1,22 @@
+# Webhooks for external integrations.
+from __future__ import absolute_import
+from typing import Text
+
+from django.http import HttpRequest, HttpResponse
+
+from zerver.lib.actions import check_send_message
+from zerver.lib.response import json_success
+from zerver.decorator import REQ, has_request_variables, api_key_only_webhook_view
+from zerver.models import UserProfile, Client
+
+
+@api_key_only_webhook_view("Heroku")
+@has_request_variables
+def api_heroku_webhook(request, user_profile, client, stream=REQ(default="heroku"),
+                       head=REQ(), app=REQ(), user=REQ(), url=REQ(), git_log=REQ()):
+    # type: (HttpRequest, UserProfile, Client, Text, Text, Text, Text, Text, Text) -> HttpResponse
+    template = "{} deployed version {} of [{}]({})\n> {}"
+    content = template.format(user, head, app, url, git_log)
+
+    check_send_message(user_profile, client, "stream", [stream], app, content)
+    return json_success()