class CategoriesController < ApplicationController
 before_action :require_admin, except: [:index, :show] 
  def index
    @categories = Category.paginate(page: params[:page], per_page: 5)
  end

  def new
    @category = Category.new
  end

  def create
    @category = Category.new(category_params)
    if @category.save
      flash[:success] = "Category was created successfully"
      redirect_to categories_path
    else
      render 'new'
    end
  end
 
  def edit
    @category = Category.find(params[:id])
  end

  def update
    @category = Category.find(params[:id])
    if @category.update(category_params)
      flash[:success] = "Category name was successfully updated"
      redirect_to category_path(@category)
    else
    render 'edit'
    end
  end
    
  def show
  @category = Category.find(params[:id])
  @category_articles = @category.articles.paginate(page: params[:page], per_page: 5)        
  end

private 
  def category_params
    params.require(:category).permit(:name)
  end
  
  def require_admin
    if !logged_in? || (logged_in? and !current_user.admin?)
        flash[:danger] = "Only admins can perform that action"
        redirect_to categories_path
    end
  end

end

