From d030c603e67e136ec8e372d5e7c2667d9c609403 Mon Sep 17 00:00:00 2001
From: Tim van der Staaij <tvdstaaij@users.noreply.github.com>
Date: Fri, 4 Mar 2016 16:48:02 +0100
Subject: [PATCH] Fix oldest_message_date in pisg formatter

---
 formatters/pisg.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/formatters/pisg.rb b/formatters/pisg.rb
index 94b122f..ceb7afc 100644
--- a/formatters/pisg.rb
+++ b/formatters/pisg.rb
@@ -40,7 +40,7 @@ def end_dialog(dialog)
   def format_message(dialog, message, output_stream)
     return unless message['date'] and message['from']
     return if message['from']['print_name'].to_s == ''
-    @oldest_message_date = Time.at(message['date'])
+    @oldest_message_date ||= Time.at(message['date'])
     @users[message['from']['id']] = message['from']
     lines = message['text'].to_s.split("\n")
     lines.push('') if lines.empty?