module DrNicMagicModels
  class Schema
    class << self
      def models
        @@models ||= nil
        load_schema if @@models.blank?
        @@models
      end
      
      def reset
        @@models = nil
      end
      
      def load_schema
        if conn = ActiveRecord::Base.connection
          @@models = DrNicMagicModels::ModelHash.new
          @@models.merge! conn.tables.inject({}) {|model_list,table_name| model_list[ActiveRecord::Base.class_name(table_name)] = table_name; model_list}
        end
      end
    end
  end
    
  class ModelHash < Hash
    def unenquire(class_id)
      @enquired ||= {}
      @enquired[class_id = class_id.to_s] = false
    end
    
    def enquired?(class_id)
      @enquired ||= {}
      @enquired[class_id.to_s]
    end
    
    def [](class_id)
      enquired?(class_id = class_id.to_s)
      @enquired[class_id] = true
      super(class_id)
    end
  end
end