module Weapps::CoursesHelper
  require 'chinese_pinyin'

  def teacher_list teachers
    data = []
    teachers.each do |teacher|
      if teacher.user.present?
        teacher_user = teacher.user
        name = teacher_user.real_name
        role = teacher.role == "CREATOR" ? "管理员" : teacher.role == "PROFESSOR" ? "教师" : "助教"
        item = {name: name, course_member_id: teacher.id, login: teacher_user.login, user_id: teacher.user_id, role: role,
                school: teacher_user.school_name, image_url: url_to_avatar(teacher_user)}
        pinyin = Pinyin.t(name.strip, splitter: '')
        first_char = pinyin[0]
        puts first_char
        if first_char.ord >= 97 && first_char.ord <= 122
          letter = (first_char.ord - 32).chr.to_s
        else
          letter = '#'
        end
        if data.pluck(:letter).include?(letter)
          data.select{|a|a[:letter]==letter}.first[:items] << item
        else
          data << {letter: letter, items: [item]}
        end
      end
    end
    return data
  end
end