mapknitter/app/controllers/application_controller.rb

class ApplicationController < ActionController::Base
  # include OpenIdAuthentication # shouldn't be necessary!!
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception

  helper :all # include all helpers, all the time

  before_filter :current_user
  helper_method :logged_in?, :current_location

  before_action :set_paper_trail_whodunnit

  def user_for_paper_trail
    # Save the user responsible for the action
    logged_in? ? current_user.id : 'Anonymous'
  end

  def current_user
    user_id = session[:user_id]
    if user_id
      begin
        @user = User.find(user_id)
      rescue StandardError
        @user = nil
      end
    else
      @user = nil
    end
  end

  private

  def current_location
    session[:lat].present? && session[:lon].present?
  end

  def require_login
    unless logged_in?
      path_info = request.env['PATH_INFO']
      flash[:warning] = 'You must be logged in to access this section'
      redirect_to '/login?back_to=' + path_info.to_param # halts request cycle
    end
  end

  def logged_in?
    user_id = session[:user_id]

    begin
      user_id && User.find(user_id) ? true : false
    rescue StandardError
      return false
    end
  end

  def save_tags(map)
    return unless params[:tags].present?

    params[:tags].tr(' ', ',').split(',').each do |tagname|
      map.add_tag(tagname.strip, current_user)
    end
  end
end