From 1cfae6101a174b891e40938177bcf8864077facf Mon Sep 17 00:00:00 2001
From: Sebastian Serth <Sebastian.Serth@hpi.de>
Date: Mon, 5 Dec 2022 18:22:18 +0100
Subject: [PATCH] Introduce additional time helper for managing intervals and
 durations

---
 app/helpers/time_helper.rb | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/app/helpers/time_helper.rb b/app/helpers/time_helper.rb
index bf5603e9..88809b38 100644
--- a/app/helpers/time_helper.rb
+++ b/app/helpers/time_helper.rb
@@ -12,6 +12,28 @@ module TimeHelper
 
   # given a delta in seconds, return a "Hours:Minutes:Seconds" representation
   def format_time_difference(delta)
-    Time.at(delta).utc.strftime('%H:%M:%S')
+    format_time(delta, '%H:%M:%S')
+  end
+
+  # given a delta in seconds, return a "Hours:Minutes:Seconds.Milliseconds" representation
+  def format_time_difference_detailed(delta)
+    format_time(delta, '%H:%M:%S.%L')
+  end
+
+  # given a ISO8601 duration (PT27M47.975972S), return a ActiveSupport::Duration
+  def parse_duration(duration)
+    return ActiveSupport::Duration.build(0) if duration.nil?
+
+    ActiveSupport::Duration.parse(duration)
+  end
+
+  private
+
+  def format_time(delta, format)
+    unless delta.is_a?(Numeric)
+      delta = parse_duration(delta)
+    end
+
+    Time.at(delta).utc.strftime(format)
   end
 end