posts_conttoller.rb

class PostController < ApplicationController
  before_action :set_post
  before_action :set_active_posts, only: [:create, :update]

  def show
    @post = @posts.find_by(slug: params[:slug])
    @author = @post.author

    if !@post.present?
      render "errors/404.html", status: :not_found
    end

    if @author.inactive?
      redirect_to posts_path
    end
  end

  def index
    @posts = Searcheable.new(params, @posts).search
    @posts = @posts.page(params[:page]).per(20)

    redirect_to blog_index_path unless @posts.size > 0
  end

  def breaking_news
    @posts = @posts.breaking.page(params[:page]).per(20)
  end

  def update
    redirect_to posts_path if !current_user.admin?

    if @post.update(post_params)
      redirect_to(@post)
    else
      render :edit, status: :unprocessable_entity
    end
  end

  def preview
  end


  private

  def posts_categories
    post_categories = [] 
    @posts.each do |post|
      if get_categories.include?(post.category)
        post_categories << post.category
      end
    end
    post_categories
  end

  def set_post
    @post = Post.active.find(params[:id])
  end

  def set_active_posts
    @posts = Post.active.include(:author)
  end

  def post_params
    params.require(:post).permit(:slug, :author_id) # rest of params go here
  end

  def get_categories
    Category.visible.all
  end
end


class Searchable 
  def initialize(params, posts)
    @params = params
    @posts = posts
  end

  def search 
    if @params[:before_date]
       @posts = @posts.where("created_at > ?", @params[:before_date])
    end

    if @params[:q]
      @q = @posts.ransack(@params[:q])
      @posts = @q.result
    end
    @posts
  end
end