add task to normalize the tracks' names

lib/tasks/normalize_tracks_names.rake

@@ -0,0 +1,20 @@
+namespace :data do
+  desc 'Replace underscores with spaces in tracks\' names and make them unique per program'
+  task normalize_tracks_names: :environment do
+    Program.all.each do |program|
+      next_track_index = {}
+      program.tracks.each do |track|
+        track_name = track.name.tr('_', ' ')
+        if next_track_index[track_name]
+          track_name += " #{next_track_index[track_name]}"
+          next_track_index[track_name] += 1
+        else
+          next_track_index[track_name] = 0
+        end
+        unless track.save
+          puts "Failed to update track #{track.name} (ID #{track.id})"
+        end
+      end
+    end
+  end
+end