admin_team_controller.rb

class Admin::TeamsController < ApplicationController
  before_action :authenticate_admin!

  def index
    unless params[:q].blank?
      term = "%#{params[:q]}%"
      @team_list = Team.where "name LIKE ?", term
    end
  end

  def edit
    @team = Team.find params[:id]
    unless params[:q].blank?
      term = "%#{params[:q]}%"
      @user_list = User.where "email LIKE ? OR first_name LIKE ? OR last_name LIKE ?", term, term, term
    end
  end

  # LOL RESTFUL
  # This is more like an add user rpc o.O
  def create
    user = User.find params[:user_id]
    team = Team.find params[:id]

    team.member_users << user unless team.has_member?(user)

    if params[:add_owner]
      team.owner_users << user unless team.owned_by?(user)
    end

    team.save!
    redirect_to admin_edit_team_url(team),
      notice: "#{user.name} was added to #{team.name}."
  end

  def update
    team = Team.find params[:id]
    changed_user_ids = diff_ids(team.member_user_ids, team_params[:member_user_ids])

    if team.update(team_params)
      # Cache buster
      User.where(id: changed_user_ids).update_all(updated_at: Time.zone.now)

      redirect_to admin_edit_team_url(team), notice: 'Team was successfully updated.'
    else
      render :edit
    end
  end

  private

  def diff_ids(existing, incoming)
    a = (existing || []).map(&:to_i)
    b = (incoming || []).map(&:to_i)

    added_ids = a - b
    removed_ids = b - a

    added_ids + removed_ids
  end

  def team_params
    params.require(:team).permit(:name, owner_user_ids: [], member_user_ids: [])
  end

end