Add Slack integration

hc/api/models.py

@@ -9,6 +9,7 @@ from django.conf import settings
 from django.core.urlresolvers import reverse
 from django.contrib.auth.models import User
 from django.db import models
+from django.template.loader import render_to_string
 from django.utils import timezone
 import requests
 
@@ -19,7 +20,7 @@ STATUSES = (("up", "Up"), ("down", "Down"), ("new", "New"))
 DEFAULT_TIMEOUT = td(days=1)
 DEFAULT_GRACE = td(hours=1)
 CHANNEL_KINDS = (("email", "Email"), ("webhook", "Webhook"),
-                 ("pd", "PagerDuty"))
+                 ("slack", "Slack"), ("pd", "PagerDuty"))
 
 
 class Check(models.Model):
@@ -123,6 +124,19 @@ class Channel(models.Model):
                 pass
 
             n.save()
+        elif self.kind == "slack":
+            text = render_to_string("slack_message.html", {"check": check})
+            payload = {
+                "text": text,
+                "username": "healthchecks.io",
+                "icon_url": "https://healthchecks.io/static/img/logo@2x.png"
+            }
+
+            r = requests.post(self.value, data=json.dumps(payload))
+
+            n.status = r.status_code
+            n.save()
+
         elif self.kind == "pd":
             if check.status == "down":
                 event_type = "trigger"

static/js/channels.js

@@ -2,6 +2,7 @@ $(function() {
     var placeholders = {
         email: "address@example.org",
         webhook: "http://",
+        slack: "https://hooks.slack.com/...",
         pd: "service key"
     }
 

templates/front/channels.html

@@ -21,6 +21,7 @@
             <td>
             {% if ch.kind == "email" %} Email {% endif %}
             {% if ch.kind == "webhook" %} Webhook {% endif %}
+            {% if ch.kind == "slack" %} Slack {% endif %}
             {% if ch.kind == "pd" %} PagerDuty {% endif %}
             </td>
             <td>
@@ -68,6 +69,7 @@
                 <select id="add-check-kind" class="form-control" name="kind">
                     <option value="email">Email</option>
                     <option value="webhook">Webhook</option>
+                    <option value="slack">Slack</option>
                     <option value="pd">PagerDuty</option>
                 </select>
             </td>
@@ -103,6 +105,11 @@
                     <span class="word-down">down</span> and will resolve it
                     when same check goes <span class="word-up">up</span>
                 </p>
+                <p class="channels-help-hidden slack">
+                    Healthchecks.io will post to a Slack channel when
+                    a check goes
+                    <span class="word-up">up</span> or <span class="word-down">down</span>.
+                </p>
             </td>
         </tr>
 

templates/front/welcome.html

@@ -222,8 +222,9 @@
     </div>
     <div class="col-sm-4">
         <p>
-            You can specify additional email addresses, webhooks
-            and <a href="https://www.pagerduty.com/">PagerDuty</a>
+            You can specify additional email addresses, webhooks,
+            <a href="https://www.pagerduty.com/">PagerDuty</a>
+            and <a href="https://slack.com/">Slack</a>
             accounts to send notifications to.
         </p>
     </div>

templates/slack_message.html

@@ -0,0 +1,8 @@
+{% load humanize %}
+
+{% if check.status == "down" %}
+The check "{{ check.name_then_code }}" is DOWN.
+Last ping was {{ check.last_ping|naturaltime }}
+{% else %}
+The check "{{ check.name_then_code }}" received a ping and is now UP.
+{% endif %}