supply_creator.rb

class Supply::SupplyCreator < ComposableOperations::Operation

  processes :params

  attr_accessor :company, :user

  attr_reader :validator, :supply

  delegate :errors, to: :validator

  def execute
    build
    validate(@supply)
    persist
    @supply
  end

  private

  def build
    @supply = company.supplies.new(params)
    @supply.user = user
    @supply
  end

  def validate(supply)
    @validator = Supply::SupplyCreateValidator.new(supply, company)
    return if @validator.valid?

    halt @validator.errors
  end

  def persist
      if @supply.save
        ActiveRecord::Base.transaction do
          generate_debit(@supply)
          if @supply.discount > 0
            apply_discount(@supply)
          end
          update_stock_group(@supply)
        end
      end
  end

  def generate_debit(supply)
    @operation = FinancialService::GenerateDebit.new supply
    @operation.kind = "supply"
    @operation.perform
  end

  def apply_discount(supply)
    @operation = Supply::ApplyDiscount.new supply
    @operation.perform
  end

  def update_stock_group(supply)
    unless params[:stock_group].blank?
      supply.stocks.each{|s| s.update_attribute(:stock_group_id, params[:stock_group].to_i)}
    end
  end

  def up_score
    return unless user.Potencial?
    user.up_score(1.8)
  end

end