Move completions methods to a concern

app/controllers/concerns/completions_concern.rb

@@ -0,0 +1,30 @@
+module CompletionsConcern
+  extend ActiveSupport::Concern
+
+  def pad(n)
+    if n > 9
+      return n.to_s
+    end
+    "0" + n.to_s
+  end
+
+  def display_time(seconds)
+    if seconds > 3600
+      hours = seconds / 3600
+      return hours.to_s + ":" + display_time(seconds % 3600)
+    elsif seconds > 60
+      minutes = seconds / 60
+      return pad(minutes) + ":" + display_time(seconds % 60)
+    end
+    pad(seconds)
+  end
+
+  def extend_completions!(completions)
+    current_time_from_start = 0
+    @completions.each do |completion|
+      completion.display_time_from_start = display_time(completion.time_seconds)
+      completion.display_relative_time = display_time(completion.time_seconds - current_time_from_start)
+      current_time_from_start += completion.time_seconds
+    end
+  end
+end