pager.rb

require 'date'



def days_between(date1, date2)
  d1 = Date.parse(date1)
  d2 = Date.parse(date2)
  (d2 - d1).to_i
end

def choose_users(day_offset)
  (day_offset/7)%2
end

def offset(day_offset)
  day_offset % 7
end

def choose_user(now)
  users1 = %w(文婷 雨辰 陈雨 孙晨 卉卉)
  
  
  users = [users1]
  day_offset = days_between("2017-05-08", now)
  users1[offset(day_offset)]
end

choose_user(Time.now.to_s)