From 06a75a3adbc877f2db7be45eacadc5d7eb9f2ca6 Mon Sep 17 00:00:00 2001
From: Dan Howe <d.howe@wrl.unsw.edu.au>
Date: Fri, 20 Jul 2018 10:30:39 +1000
Subject: [PATCH] Ensure survey dates are saved in correct order

---
 survey_tools.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/survey_tools.py b/survey_tools.py
index c9eec31..b9e2548 100644
--- a/survey_tools.py
+++ b/survey_tools.py
@@ -143,7 +143,7 @@ def update_survey_output(df, output_dir):
         output_dir:  directory where csv files are saved
 
     Returns:
-        None
+        True if current survey is latest, otherwise False
     """
     # Merge current survey with existing data
     profiles = df['Profile'].unique()
@@ -168,5 +168,10 @@ def update_survey_output(df, output_dir):
         except FileExistsError:
             pass
 
+        # Ensure survey dates are in correct order
+        elev_cols = sorted([col for col in master.columns if 'Elevation' in col])
+        other_cols = [col for col in master.columns if 'Elevation' not in col]
+        master = master[other_cols + elev_cols]
+
         # Export updated results
         master.to_csv(csv_name, index=False)