application_decorator.rb

class ApplicationDecorator < Draper::Base
  def initialize(input, options={})
    input = input.model if input.is_a?(self.class)
    super input, options
  end
end

plan_decorator.rb

class PlanDecorator < ApplicationDecorator
  decorates :plan
  decorates_association :weigh_ins
  decorates_association :purchase
  decorates_association :owner

  def description
    purchase.description
  end

  def number
    "##{plan.id}"
  end

  def admin_link
    if plan
      h.link_to number, h.admin_plan_path(plan)
    else
      "n/a"
    end
  end

  def wager
    h.lioli_money plan.wager
  end

  def penalty
    h.lioli_money plan.penalty
  end

  def refund
    h.lioli_money plan.refund
  end

  def goal_delta
    "#{plan.goal_delta.to_i} lb"
  end

  def skipped_weigh_in_penalty
    h.lioli_money plan.skipped_weigh_in_penalty
  end

  def missed_goal_penalty
    h.lioli_money plan.missed_goal_penalty
  end

  def type_description
    if plan.keep_it_off?
      "keep it off"
    else
      "lose #{goal_delta}"
    end
  end

  def no_friends_message(current_user=nil)
    edit_friends_link = h.link_to "Notify some friends", h.edit_friends_path

    h.content_tag(:p, :class => 'blank') do
      if plan.owned_by?(current_user)
        if plan.keep_it_off?
          "Keeping off the weight alone sucks. #{edit_friends_link} to help you with keeping it off!"
        else
          "Losing weight alone sucks. #{edit_friends_link} to help you with losing weight!"
        end
      else
        "They haven't added friends yet."
      end.html_safe
    end
  end

  def no_strategy_message(current_user=nil)
    edit_strategy_link = h.link_to 'Come up with a strategy', h.edit_strategy_path
    h.content_tag(:p, :class => 'blank') do
      if plan.owned_by?(current_user)
        if plan.keep_it_off?
          "#{ edit_strategy_link } for keeping off the weight so whenever you are unsure of what to do, you can come back to it and decide."
        else
          "#{ edit_strategy_link } for losing the weight so whenever you are unsure of what to do, you can come back to it and decide."
        end
      else
        "They haven't added a strategy yet."
      end.html_safe
    end
  end

  def no_incentives_message(current_user=nil)
    edit_incentives_link = h.link_to 'adding some incentives', h.edit_incentives_path
    h.content_tag(:p, :class => 'blank') do
      if plan.owned_by?(current_user)
        "Keep yourself motivated by #{edit_incentives_link} to your profile which you will buy with your reward."
      else
        "They haven't added incentives yet."
      end.html_safe
    end
  end

  def edit_strategy_intro
    h.content_tag(:p, :class => 'introduction') do
      if plan.keep_it_off?
				"How are you going to keep off the weight this time? Share some details&hellip;"
      else
				"How are you going to lose weight this time? Share some details&hellip;"
      end.html_safe
    end
  end
end