sevos

module ApplicationHelper
  def present(object, klass = nil)
    klass ||= "#{object.class}Presenter".constantize
    presenter = klass.new(object, self)
    yield presenter if block_given?
    presenter
  end
end

sevos

class User
  def initialize(context)
    @context = context
  end

  def profile
    @context.system.collections.profiles.where(id: @context.session[:current_user_id]).first
  end
end

sevos

MVC is not enough for backend apps. It's time for car (t)rap!

• C as Context (former controllers). Assigns roles to actors, runs the play.

• A as Actor - user, system, external system

• R as Role - DCI role injected to Actor by Context. User: [buyer, inviter], system: [shop, blog]

• T as Template - html, json, xml, whatever. It's optional, sometimes Presenter does the job

• R as Router - we need something parsing requests and passing them to proper context

• A as Artifact - product of actor's action. Order, invoice, product, post, profile. Persistence goes here

• P as Presenter (former helpers)

sevos

class BasePresenter
  def initialize(object, template)
    @object = object
    @template = template
  end
private

  def self.inherited(klass)
    name = klass.name.match(/(\w+)Presenter/).captures.first.underscore
    klass.instance_eval do

sevos

class ApplicationHelper
  def present(object, klass = "#{object.class}Presenter".constantize)
    presenter = klass.new(object, self)
    yield presenter if block_given?
    presenter
  end
end

sevos

class Department < ActiveRecord::Base
  has_one :stock
end

class Stock < ActiveRecord::Base
  belongs_to :department

  def update
    update_attribute :value, Legacy::Department.find(department.id).stock_value
  end

sevos

class Department << ActiveRecord::Base
end

sevos

!!!
%html
  %head
    %title
      Zrzuta na...
      = yield :title

    = stylesheet_link_tag    "application"
    = javascript_include_tag "application"
    = csrf_meta_tags

sevos

class DailyStatsReport < KPI::Report
  def users
    result 'Users', User.count, :description => 'Total users count'
  end

  def premium_users
    result 'Premium users', User.premium.count
  end

  def premium_users_percentage

sevos

@import clearfix.sass

$grid_width: 1200px
$grid_glue: 10px
$grid_boxes: 24

=grid-container
  +clearfix
  padding:
    left: 0px