filter_ativity.rb

class UsersController < ApplicationController

   before_action :set_user, only: [:edit, :show, :update, :destroy]
   after_action  :send_slack, only: [:create, :update, :destroy]
  def index
    @users = User.all
  end

  def show

  end

  def new
    @user = User.new
  end

  def edit

  end

  def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: 'User was successfully created.' }
        format.json { render :show, status: :created, location: @user }
      else
        format.html { render :new }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to @user, notice: 'User was successfully updated.' }
        format.json { render :show, status: :ok, location: @user }
      else
        format.html { render :edit }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy

    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url, notice: 'User was successfully destroyed.' }
      format.json { head :no_content }
    end 
  end

  private

  def set_user
    @user = User.find(params[:id])
  end

  def send_slack
    Slack.notify_channel
  end

    def user_params
      params.require(:user).permit(:username, :email)
    end
end