+ def generate_used_by_edges(visited, uuid)
+ m = collection_uuid(uuid)
+ uuid = m if m
+
+ if not uuid or uuid.empty? or visited[uuid]
+ return ""
+ end
+
+ logger.debug "visiting #{uuid}"
+
+ if m
+ # uuid is a collection
+ Collection.readable_by(current_user).where(uuid: uuid).each do |c|
+ visited[uuid] = c.as_api_response
+ visited[uuid][:files] = []
+ c.files.each do |f|
+ visited[uuid][:files] << f
+ end
+ end
+
+ if uuid == "d41d8cd98f00b204e9800998ecf8427e+0"
+ # special case for empty collection
+ return
+ end
+
+ Job.readable_by(current_user).where(["jobs.script_parameters like ?", "%#{uuid}%"]).each do |job|
+ generate_used_by_edges(visited, job.uuid)
+ end
+
+ else
+ # uuid is something else
+ rsc = ArvadosModel::resource_class_for_uuid uuid
+ if rsc == Job
+ Job.readable_by(current_user).where(uuid: uuid).each do |job|
+ visited[uuid] = job.as_api_response
+ generate_used_by_edges(visited, job.output)
+ end
+ elsif rsc != nil
+ rsc.where(uuid: uuid).each do |r|
+ visited[uuid] = r.as_api_response
+ end
+ end
+ end
+
+ Link.readable_by(current_user).
+ where(tail_uuid: uuid, link_class: "provenance").
+ each do |link|
+ visited[link.uuid] = link.as_api_response
+ generate_used_by_edges(visited, link.head_uuid)
+ end
+
+ #puts "finished #{uuid}"
+ end
+
+ def used_by
+ visited = {}
+ generate_used_by_edges(visited, @object[:uuid])
+ render json: visited
+ end