chris@1011: 
chris@1011: module ActivitiesHelper
chris@1011: 
chris@1011:   def busy_projects(events, count)
chris@1186: 
chris@1186:     # Score each project for which there are any events, by giving
chris@1186:     # each event a score based on how long ago it was (the more recent
chris@1186:     # the better).
chris@1186: 
chris@1186:     projhash = Hash.new
chris@1186:     
chris@1186:     events.each do |e|
chris@1186:       if e.respond_to?(:project)
chris@1186:         p = e.project
chris@1186:         d = if e.respond_to? :updated_at then e.updated_at else e.updated_on end
chris@1186:         dd = Date.parse d.to_s
chris@1186:         age = Date.today - dd
chris@1186:         score = (age < 14 ? 15-age : 1)
chris@1186:         if projhash.key? p
chris@1186:           projhash[p] += score
chris@1186:         else
chris@1186:           projhash[p] = score
chris@1186:         end
chris@1186:       end
chris@1186:     end
chris@1186: 
chris@1186:     # pick N highest values and use cutoff value as selection threshold
chris@1186:     threshold = projhash.values.sort.last(count).first
chris@1186: 
chris@1186:     # select projects above threshold and pick N from them randomly
chris@1186:     busy = projhash.keys.select { |k| projhash[k] >= threshold }.sample(count)
chris@1186: 
chris@1186:     # return projects rather than just ids
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