acts_as_gmappable.rb

module Gmaps4rails
  module ActsAsGmappable
    
    def self.included base
      base.send :include, InstanceMethods
      base.send :extend, ClassMethods
    end
    
    module InstanceMethods
      
      # This is a validation method which triggers the geocoding and save its results
      def process_geocoding
        Gmaps4rails::ModelHandler.new(self, gmaps4rails_options).retrieve_coordinates
      end
      
      # creates json for one instance 
      def to_gmaps4rails(&block)
        json = "["
        object_json = Gmaps4rails.create_json(self, &block)
        json << object_json.to_s unless object_json.nil?
        json << "]"
      end

    end

    module ClassMethods

      def acts_as_gmappable args = {}    
        
        validate :process_geocoding
        
        #instance method containing all the options to configure the behaviour of the gem regarding the current Model
        define_method "gmaps4rails_options" do
          {
            :process_geocoding  => args[:process_geocoding].nil? ?  true : args[:process_geocoding],
            :check_process      => args[:check_process].nil?     ?  true : args[:check_process],
            :checker            => args[:checker]                || "gmaps",
                                                                 
            :lat_column         => args[:lat]                    || "latitude",
            :lng_column         => args[:lng]                    || "longitude",

            # purposefully no default. 
            # Leaving out the :position arg means we are using the default lat/lng to store coordinates
            :position           => args[:position], 
                                                                 
            :msg                => args[:msg]                    || "Address invalid",
            :validation         => args[:validation].nil?        ?   true  : args[:validation],
                                                                                                                                 
            :language           => args[:language]               || "en",
            :protocol           => args[:protocol]               || "http",
            
            :address            => args[:address]                || "gmaps4rails_address",
            :callback           => args[:callback],
            :normalized_address => args[:normalized_address]
          }
        end
        
      end
    end

  end
end