[server]: Add return_newest_data

server/src/functions/return_newest_data/lambda_function.py

@@ -0,0 +1,29 @@
+import boto3
+import json
+from boto3.dynamodb.conditions import Attr
+import os
+
+dynamodb = boto3.resource('dynamodb')
+table = dynamodb.Table(os.environ['TABLE_NAME'])
+
+def lambda_handler(event, context):
+    try:
+        # Scan the table to get all items
+        response = table.scan(
+            FilterExpression=Attr('timestamp').exists()
+        )
+        items = response['Items']
+
+        newest_timestamp = max([int(item['timestamp'] for item in items)])
+        newest_items = [item for item in items if int(item['timestamp']) == newest_timestamp]
+
+        return {
+            'statusCode': 200,
+            'body': json.dumps(newest_items)
+        }
+    
+    except Exception as e:
+        return {
+            'statusCode': 500,
+            'body': json.dumps({'error': str(e)})
+        }