chris@1011: 
chris@1011: module ActivitiesHelper
chris@1011: 
chris@1011:   def busy_projects(events, count)
chris@1011:     # Transform events list into hash from project id to number of
chris@1011:     # occurrences of project in list (there is surely a tidier way
chris@1011:     # to do this, e.g. chunk() in Ruby 1.9 but not in 1.8)
chris@1168:     phash = events.map do |e|
chris@1168:       e.project unless !e.respond_to?(:project)
chris@1168:     end.select { |p| !p.nil? }.sort.group_by { |p| p.id }
chris@1011:     phash = phash.merge(phash) { |k,v| v.length }
chris@1011:     threshold = phash.values.sort.last(count).first
chris@1011:     busy = phash.keys.select { |k| phash[k] >= threshold }.sample(count)
chris@1011:     busy.map { |pid| Project.find(pid) }
chris@1011:   end
chris@1011: 
chris@1011:   def busy_institutions(events, count)
Chris@1013:     authors = events.map do |e|
Chris@1013:       e.event_author unless !e.respond_to?(:event_author) 
Chris@1013:     end.compact
Chris@1013:     institutions = authors.map do |a|
Chris@1013:       if a.respond_to?(:ssamr_user_detail) and !a.ssamr_user_detail.nil?
Chris@1013:         a.ssamr_user_detail.institution_name
Chris@1013:       end
Chris@1013:     end
chris@1011:     insthash = institutions.compact.sort.group_by { |i| i }
chris@1011:     insthash = insthash.merge(insthash) { |k,v| v.length }
chris@1011:     threshold = insthash.values.sort.last(count).first
chris@1011:     insthash.keys.select { |k| insthash[k] >= threshold }.sample(count)
chris@1011:   end
chris@1011: 
chris@1011: end