recording previews

app/views/bbb/_preview.jbuilder

@@ -0,0 +1,4 @@
+json.url preview[:content]
+json.width preview[:width]
+json.height preview[:height]
+json.alt preview[:alt]

app/views/bbb/recordings.jbuilder

@@ -2,22 +2,26 @@ json.partial! 'bbb', messageKey: @messageKey, message: @message, status: @status
 unless @response.blank?
   json.is_owner current_user == @user
   json.recordings do
-    unless @response.is_a? Array
-      @response = [@response]
-    end
     json.array!(@response) do |recording|
       json.id recording[:recordID]
       json.name recording[:name]
       json.start_time recording[:startTime]
       json.end_time recording[:endTime]
       json.published recording[:published]
-      json.playbacks do
-        unless recording[:playback][:format].is_a? Array
-          recording[:playback][:format] = [recording[:playback][:format]]
+      json.previews do
+        json.array!(recording[:previews]) do |preview|
+          json.partial! 'preview', preview: preview
         end
-        json.array!(recording[:playback][:format]) do |playback|
+      end
+      json.playbacks do
+        json.array!(recording[:playbacks]) do |playback|
           json.type playback[:type]
           json.url playback[:url]
+          json.previews do
+            json.array!(playback[:previews]) do |preview|
+              json.partial! 'preview', preview: preview
+            end
+          end
         end
       end
     end