Add new method to check if a page is deleted.

Author: danieltharp

2stacks-page-check-for-deletion

@@ -0,0 +1,31 @@
+import json
+import config
+import helpers
+
+def lambda_handler(event, context):
+    for record in event['Records']:
+        callback_url = record['messageAttributes']['callback_url']['stringValue']
+        wd_page_id = record['messageAttributes']['page_id']['stringValue']
+        wikidot_site = record['messageAttributes']['wikidot_site']['stringValue']
+        
+        logger.info(wd_page_id)
+        data = {'page_id': wd_page_id, 'moduleName': 'pagerate/PageRateWidgetModule'}
+        try:
+            haystack = helpers.fetch(data, wikidot_site)
+        except JSONDecodeError:  
+            # We get a 500 error back on an actually 
+            # deleted page which is exposed here as a JSON Decode error as we're 
+            # looking for the body of the message, which isn't passed to us.
+            
+            # This is actually the only place we need to act because moved pages 
+            # are handled by SCUTTLE firing a get_page_metadata job on what it 
+            # sees as a 'new page.'
+
+            headers = {"Authorization": "Bearer " + config.scuttle_token, "Content-Type": "application/json"}
+            r = requests.delete(callback_url + '/2stacks/page/delete/' + str(wd_page_id), headers=headers)
+            
+            return { 'job': 'article_deleted' }
+    return {
+        'statusCode': 200,
+        'body': json.dumps('Hello from Lambda!')
+    }