Include size in pkgselect responses

lambdas/pkgselect/index.py

@@ -56,10 +56,16 @@ def file_list_to_folder(df: pd.DataFrame) -> dict:
     lambda).
     """
     try:
-        folder = pd.Series(df.logical_key.dropna().str.extract('([^/]+/?).*')[0].unique())
-        prefixes = folder[folder.str.endswith('/')].sort_values().tolist()
-        objects = folder[~folder.str.endswith('/')].sort_values().tolist()
-    except AttributeError:
+        groups = df.groupby(df.logical_key.str.extract('([^/]+/?).*')[0], dropna=True)
+        folder = groups.agg(
+            size=('size', 'sum'),
+            physical_key=('physical_key', 'first')
+        )
+        folder.reset_index(inplace=True)
+        folder.rename(columns={0: 'logical_key'}, inplace=True)
+        prefixes = folder[folder.logical_key.str.contains('/')].to_dict(orient='records')
+        objects = folder[~folder.logical_key.str.contains('/')].to_dict(orient='records')
+    except AttributeError as err:
         # Pandas will raise an attribute error if the DataFrame has
         # no rows with a non-null logical_key. We expect that case if
         # either: (1) the package is empty (has zero package entries)
@@ -172,7 +178,8 @@ def lambda_handler(request):
         # Call s3 select to fetch only logical keys matching the
         # desired prefix (folder path)
         prefix_length = len(prefix) if prefix is not None else 0
-        sql_stmt = f"SELECT SUBSTRING(s.logical_key, {prefix_length + 1}) AS logical_key FROM s3object s"
+        sql_stmt = f"SELECT SUBSTRING(s.logical_key, {prefix_length + 1}) AS logical_key"
+        sql_stmt += ", s.\"size\", s.physical_keys[0] as physical_key FROM s3object s"
         if prefix:
             sql_stmt += f" WHERE SUBSTRING(s.logical_key, 1, {prefix_length}) = '{sql_escape(prefix)}'"
         result = query_manifest_content(
@@ -185,10 +192,23 @@ def lambda_handler(request):
         df = pd.read_json(result, lines=True)
         response_data = file_list_to_folder(df)
 
+        # Fetch package-level or directory-level metadata
+        if prefix:
+            sql_stmt = f"SELECT s.meta FROM s3object s WHERE s.logical_key = '{sql_escape(prefix)}'"
+        else:
+            sql_stmt = "SELECT s.* FROM s3object s WHERE s.logical_key is NULL"
+        result = query_manifest_content(
+            s3_client,
+            bucket=bucket,
+            key=key,
+            sql_stmt=sql_stmt
+        )
+
     ret_val = make_json_response(
         200,
         {
-            'contents': response_data
+            'contents': response_data,
+            'meta': json.load(result) if result else {}
         }
     )
 

lambdas/pkgselect/test/test_pkgselect.py

@@ -36,9 +36,15 @@ def setUp(self):
             "bar/baz/file3.txt",
             "bar/baz/file4.txt"
         ]
-        jsonl = ""
+        entries = []
         for key in logical_keys:
-            jsonl += "{\"logical_key\": \"%s\"}\n" % key
+            entry = dict(
+                logical_key=key,
+                physical_key=f"{key}?versionid=1234",
+                size=100
+            )
+            entries.append(json.dumps(entry))
+        jsonl = "\n".join(entries)
         print(jsonl)
         streambytes = jsonl.encode()
 
@@ -165,8 +171,8 @@ def test_browse_top_level(self):
         folder = file_list_to_folder(df)
         assert len(folder['prefixes']) == 1
         assert len(folder['objects']) == 1
-        assert 'foo.csv' in folder['objects']
-        assert 'bar/' in folder['prefixes']
+        assert folder['objects'][0]['logical_key'] == 'foo.csv'
+        assert folder['prefixes'][0]['logical_key'] == 'bar/'
 
     def test_browse_subfolder(self):
         """
@@ -176,16 +182,22 @@ def test_browse_subfolder(self):
         prefix = "bar/"
         df = pd.read_json(buffer_s3response(self.s3response), lines=True)
         assert isinstance(df, pd.DataFrame)
-
         filtered_df = df[df['logical_key'].str.startswith(prefix)]
         stripped = filtered_df['logical_key'].str.slice(start=len(prefix))
-        folder = file_list_to_folder(stripped.to_frame('logical_key'))
-        print(folder)
+        stripped_df = stripped.to_frame('logical_key')
+        s3_df = pd.concat(
+            [stripped_df['logical_key'], filtered_df['size'], filtered_df['physical_key']],
+            axis=1,
+            keys=['logical_key', 'size', 'physical_key']
+        )
+
+        folder = file_list_to_folder(s3_df)
         assert len(folder['prefixes']) == 1
         assert len(folder['objects']) == 2
-        assert "file1.txt" in folder['objects']
-        assert "file2.txt" in folder['objects']
-        assert "baz/" in folder['prefixes']
+        object_keys = [obj['logical_key'] for obj in folder['objects']]
+        assert "file1.txt" in object_keys
+        assert "file2.txt" in object_keys
+        assert folder['prefixes'][0]['logical_key'] == "baz/"
 
     def test_browse_subsubfolder(self):
         """
@@ -197,13 +209,20 @@ def test_browse_subsubfolder(self):
         assert isinstance(df, pd.DataFrame)
         filtered_df = df[df['logical_key'].str.startswith(prefix)]
         stripped = filtered_df['logical_key'].str.slice(start=len(prefix))
-        folder = file_list_to_folder(stripped.to_frame('logical_key'))
+        stripped_df = stripped.to_frame('logical_key')
+        s3_df = pd.concat(
+            [stripped_df['logical_key'], filtered_df['size'], filtered_df['physical_key']],
+            axis=1,
+            keys=['logical_key', 'size', 'physical_key']
+        )
+        folder = file_list_to_folder(s3_df)
         assert "objects" in folder
         assert "prefixes" in folder
         assert not folder['prefixes']
         assert len(folder['objects']) == 2
-        assert "file3.txt" in folder['objects']
-        assert "file4.txt" in folder['objects']
+        object_keys = [obj['logical_key'] for obj in folder['objects']]
+        assert "file3.txt" in object_keys
+        assert "file4.txt" in object_keys
 
     def test_folder_view(self):
         """
@@ -245,8 +264,8 @@ def test_folder_view(self):
             folder = json.loads(read_body(response))['contents']
             assert len(folder['prefixes']) == 1
             assert len(folder['objects']) == 1
-            assert 'foo.csv' in folder['objects']
-            assert 'bar/' in folder['prefixes']
+            assert folder['objects'][0]['logical_key'] == 'foo.csv'
+            assert folder['prefixes'][0]['logical_key'] == 'bar/'
         client_patch.stop()
 
     def test_detail_view(self):
@@ -381,10 +400,11 @@ def test_anon_access(self):
             print(response)
             assert response['statusCode'] == 200
             folder = json.loads(read_body(response))['contents']
+            print(folder)
             assert len(folder['prefixes']) == 1
             assert len(folder['objects']) == 1
-            assert 'foo.csv' in folder['objects']
-            assert 'bar/' in folder['prefixes']
+            assert folder['objects'][0]['logical_key'] == 'foo.csv'
+            assert folder['prefixes'][0]['logical_key'] == 'bar/'
         s3_stubber.deactivate()
         client_patch.stop()
         env_patcher.stop()

lambdas/shared/t4_lambda_shared/utils.py

@@ -101,10 +101,12 @@ def buffer_s3response(s3response):
     response = io.StringIO()
     end_event_received = False
     stats = None
+    found_records = False
     for event in s3response['Payload']:
         if 'Records' in event:
             records = event['Records']['Payload'].decode()
             response.write(records)
+            found_records = True
         elif 'Progress' in event:
             print(event['Progress']['Details'])
         elif 'Stats' in event:
@@ -116,7 +118,7 @@ def buffer_s3response(s3response):
     if not end_event_received:
         raise IncompleteResultException("Error: Received an incomplete response from S3 Select.")
     response.seek(0)
-    return response
+    return response if found_records else None
 
 
 def query_manifest_content(