CDB-3837 Rake ready

lib/tasks/overlays.rake

@@ -4,6 +4,39 @@
 namespace :cartodb do
   namespace :overlays do
 
+    desc 'removes duplicated overlays from visualizations'
+    task :remove_duplicate_overlays => :environment do |t, args|
+      count = 0
+      unique_types = CartoDB::Overlay::Member::UNIQUE_TYPES
+      CartoDB::Visualization::Collection.new.fetch({ per_page: 999999 }).each { |vis|
+        if vis.user
+          begin
+            overlays_counts = {}
+            if !vis.overlays.nil? && vis.overlays.count > 0
+              vis.overlays.each { |overlay|
+                if !overlays_counts[overlay.type].present?
+                  overlays_counts[overlay.type] = 1
+                else
+                  if unique_types.include?(overlay.type)
+                    puts "Found duplicate for #{vis.id} of type '#{overlay.type}'"
+                    overlay.delete
+                  else
+                    overlays_counts[overlay.type]+=1
+                  end
+                end
+              }
+            end
+            if count % 500 == 0
+              puts "Progress: #{count}"
+            end
+            count+=1
+          rescue => e
+            puts "ERROR: failed to remove duplicate overlays for #{vis.id}: #{e.message}"
+          end
+        end
+      }
+    end
+
     desc 'create overlays from url_options'
     task :create_overlays, [:clear_overlays] => :environment do |t, args|
       ok = 0