class SyllabusMemberController < ApplicationController

  def syl_member_autocomplete
    @syllabus = Syllabus.find(params[:syllabus])
    @flag = params[:flag] || false
    respond_to do |format|
      format.js
    end
  end

  def create
    @syllabus = Syllabus.find(params[:syllabus])
    if params[:membership].nil?
      @fail_hint = l(:label_blank_user_lists_for_org)
    else
      member_ids = params[:membership][:user_ids]
      last_rank = @syllabus.syllabus_members.order("rank asc").last.rank
      user_ids = @syllabus.syllabus_members.map{|sy| sy.user_id}
      member_ids.each_with_index do |user_id, i|
        unless user_ids.include?(user_id.to_i)
          member =  SyllabusMember.create(:user_id => user_id, :rank => last_rank + 1 + i)
          @syllabus.syllabus_members << member
        end
      end
      @members = @syllabus.syllabus_members.order("rank asc")
    end
    respond_to do |format|
      format.js
    end
  end

  def destroy
    member = SyllabusMember.find(params[:id])
    @syllabus = member.syllabus
    after_syl_members = @syllabus.syllabus_members.where("rank > #{member.rank}")
    after_syl_members.update_all("rank = rank - 1")
    member.destroy
    @members = @syllabus.syllabus_members.order("rank asc")
    respond_to do |format|
      format.js
    end
  end

  def update_rank
    member = SyllabusMember.find(params[:id])
    @syllabus = member.syllabus
    members = @syllabus.syllabus_members
    if params[:opr] == 'up' && member.rank > 1
      before_mem = members.where("rank = #{member.rank - 1}").first
      if before_mem && member.update_attribute('rank', member.rank - 1)
        before_mem.update_attribute('rank', before_mem.rank + 1)
      end
    elsif params[:opr] == 'down' && member.rank < members.count
      after_mem = members.where("rank = #{member.rank + 1}").first
      if after_mem && member.update_attribute('rank', member.rank + 1)
        after_mem.update_attribute('rank', after_mem.rank - 1)
      end
    end
    @members = @syllabus.syllabus_members.order("rank asc")
    respond_to do |format|
      format.js
    end
  end
end