application_controller.rb

# Filters added to this controller apply to all controllers in the application.
# Likewise, all the methods added will be available for all controllers.

class ApplicationController < ActionController::Base
  include InheritedResources::DSL
  include PaginateScopeHelper

  helper :all # include all helpers, all the time
  protect_from_forgery # See ActionController::RequestForgeryProtection for details

  # Scrub sensitive parameters from your log
  filter_parameter_logging :password

  helper_method :current_user_session, :current_user

  before_filter :set_timezone

  private

  def set_timezone
    if SETTINGS.time_zone
      time_zone_obj = ActiveSupport::TimeZone.new(SETTINGS.time_zone)
      raise Exception.new("Invalid timezone #{SETTINGS.time_zone.inspect}") unless time_zone_obj
      Time.zone = time_zone_obj
    end
  end

  def current_user_session
    return @current_user_session if defined?(@current_user_session)
    @current_user_session = UserSession.find
  end

  def current_user
    return @current_user if defined?(@current_user)
    @current_user = current_user_session && current_user_session.user
  end

  def require_user
    unless current_user
      store_location
      flash[:error] = "You must be logged in to access this page"
      redirect_to new_user_session_url
      return false
    end
  end

  def require_no_user
    if current_user
      store_location
      flash[:error] = "You must be logged out to access this page"
      redirect_to account_url
      return false
    end
  end

  def store_location
    session[:return_to] = request.request_uri
  end

  def redirect_back_or_default(default)
    redirect_to(session[:return_to] || default)
    session[:return_to] = nil
  end

  def handle_parameters_for(param)
    if params[param] && params[param][:parameters]
      parameter_pairs = params[param][:parameters][:key].zip(params[param][:parameters][:value]).flatten
      params[param][:parameters] = Hash[*parameter_pairs].reject{|k,v| k.blank?}
    else
      params[param][:parameters] = {}
    end
  end
end