kzys/2014

class PostsController < ApplicationController
  before_action :set_post, only: [:show, :edit, :update, :destroy]
  before_action :set_author, only: [:new, :edit, :update, :destroy]

  # GET /posts
  # GET /posts.json
  def index
    language = params[:language]
    query = if language
               Post.where(language: language).order(created_at: :desc)
             else
               Post.order(created_at: :desc)
             end
    @posts = query.page(params[:page])
  end

  def recent
    language = params[:language]
    @posts = if language
               Post
                 .where(language: language)
                 .order(created_at: :desc).limit(10).load
             else
               Post.order(created_at: :desc).limit(10).load
             end

    respond_to do |format|
      format.atom { render :layout => false }
    end
  end

  # GET /posts/1
  # GET /posts/1.json
  def show
    @post = Post.find_by(id: params[:id])
    assert_date(@post.created_at, params)
  end

  # GET /posts/new
  def new
    @post = Post.new
  end

  # GET /posts/1/edit
  def edit
  end

  # POST /posts
  # POST /posts.json
  def create
    @post = Post.new(post_params)
    @post.author = self.current_author

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

  # PATCH/PUT /posts/1
  # PATCH/PUT /posts/1.json
  def update
    respond_to do |format|
      if @post.update(post_params)
        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @post.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /posts/1
  # DELETE /posts/1.json
  def destroy
    @post.destroy
    respond_to do |format|
      format.html { redirect_to posts_url }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_post
      @post = Post.find(params[:id])
    end

    def set_author
      redirect_to posts_path unless current_author
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def post_params
      params.require(:post).permit(:title, :content, :language)
    end

    def assert_date(date, params)
      %w(year month day).map do |s|
        s.to_sym
      end.each do |symbol|
        if params[symbol] && params[symbol].to_i != date.send(symbol)
          raise ActiveRecord::RecordNotFound.new("Couldn't find Post with id=#{@post.id} and #{symbol}=#{params[symbol]}")
        end
      end
    end
end