project_parts_controller.rb

class ProjectPartsController < ApplicationController
  before_filter :authenticate_user!, :authorize_project

  STEPS = ['basic_info', 'detail', 'document_content', 'preview']

  def edit
    if wizard_step_project.editable?
      if step.present?
        render step
      else
        render "#{Rails.root.to_s}/public/404.html", :layout => false, :status => 404
      end
    else
      redirect_to :back, :alert => I18n.t("project.#{@project.status}_editable_error")
    end
  end

  def update
    if wizard_step_project.update_attributes(params[:project])
      if next_step && params[:commit].downcase.include?('continue')
        redirect_to edit_project_project_part_path(wizard_step_project, next_step)
      else
        redirect_to project_path(@project)
      end
    else
      render step, :error => "Please complete all required fields"
    end
  end

  private

  def authorize_project
    @project = wizard_step_project
    if @project.user_id != current_user.id && !current_user.is_admin?
      render(:file => "#{Rails.root.to_s}/public/403.html", :layout => false, :status => 403)
    end
  end

  def wizard_step_project
    project_class = "Project::#{step.camelcase}".constantize rescue Project
    project_class.find(params[:project_id])
  end

  def step
    STEPS.find {|a_step| a_step == params[:id].to_s.downcase}
  end

  def next_step
    current_step_index = STEPS.index(step)
    next_step = STEPS[current_step_index+1]
  end
  
end