Add support for ElastiCache snapshot notifications, minor code reorg

README.md

@@ -3,6 +3,10 @@
 ## Abstract
 AWS SNS/Lambda central alert hub taking SNS messages, parsing and formatting them before sending them to any messaging service, like Slack, Matrix, etc
 
+## Tests
+All env variables are forwarded into the test container.  
+Simply set WEBHOOK_URL accordingly before running `make test`.
+
 ## Resources
 - https://gallery.ecr.aws/zero-downtime/sns-alert-hub
 - https://github.com/caronc/apprise

app.py

@@ -96,6 +96,10 @@ def handler(event, context):
         msg = {}
         pass
 
+    body = ""
+    title = ""
+    msg_type = apprise.NotifyType.INFO
+
     # CloudWatch Alarm ?
     if "AlarmName" in msg:
         title = "AWS Cloudwatch Alarm"
@@ -133,7 +137,6 @@ def handler(event, context):
             pass
 
         body = body + "\n\n_{}_".format(msg_context)
-        apobj.notify(body=body, title=title, notify_type=msg_type)
 
     elif "Source" in msg and msg["Source"] == "CloudBender":
         title = "AWS EC2 - CloudBender"
@@ -175,7 +178,6 @@ def handler(event, context):
             body = body + "\n```{}```".format(msg["Attachment"])
 
         body = body + "\n\n_{}_".format(msg_context)
-        apobj.notify(body=body, title=title, notify_type=msg_type)
 
     elif "receiver" in msg and msg["receiver"] == "alerthub-notifications":
 
@@ -234,13 +236,14 @@ def handler(event, context):
             except KeyError:
                 pass
 
-            # Finally send each parsed alert
-            apobj.notify(body=body, title=title, notify_type=msg_type)
+    # New simple ElasticCache notifications
+    elif "ElastiCache:SnapshotComplete" in msg:
+        title = "ElastiCache Snapshot complete."
+        body = "Taken on {}".format(msg["ElasticCache:SnapshotComplete"])
 
     else:
+        title = "Unknown message type"
+        msg_type = apprise.NotifyType.WARNING
         body = sns["Message"]
-        apobj.notify(
-            body=body,
-            title="Unknown message type",
-            notify_type=apprise.NotifyType.WARNING,
-        )
+
+    apobj.notify(body=body, title=title, notify_type=msg_type)