Add a stub for the turbot web view

Basically just to ensure we can distinguish a Slack request from any
other.

diff --git a/turbot_lambda/turbot_lambda.py b/turbot_lambda/turbot_lambda.py
index 1aa428fa95c0740d05c8aa3368877479a07f66ea..d529c85ed625a1846d3dd7e72703de9ecc912676 100644 (file)
--- a/turbot_lambda/turbot_lambda.py
+++ b/turbot_lambda/turbot_lambda.py
@@ -89,12 +89,43 @@ def error(message):
 def turbot_lambda(event, context):
     """Top-level entry point for our lambda function.
 
+    This can handle either a REST API request from Slack, or an HTTP
+    request for teh Turbot web view
+    """
+
+    # First, determine if we've been invoked by Slack, (by presence of
+    # the X-Slack-Signature header)
+    headers = requests.structures.CaseInsensitiveDict(event['headers'])
+
+    if 'X-Slack-Signature' in headers:
+        return turbot_slack_handler(event, context)
+
+    # Otherwise, emit the Turbot web view
+    return turbot_web_view(event, context)
+
+def turbot_web_view(event, context):
+    """Turbot web view
+
+    """
+
+    return {
+        'statusCode': '200',
+        'body': 'Hello, Lambda world.',
+        'headers': {
+            'Content-Type': 'application/text',
+        },
+    }
+
+def turbot_slack_handler(event, context):
+    """Primary entry point for all Slack-initiated API requests to Turbot
+
     This function first verifies that the request actually came from
     Slack, (by means of the SLACK_SIGNING_SECRET SSM parameter), and
     refuses to do anything if not.
 
     Then this defers to either turbot_event_handler or
     turbot_slash_command to do any real work.
+
     """
 
     headers = requests.structures.CaseInsensitiveDict(event['headers'])