require 'lib/string_helper'

module Connectors
  module Helpers
    module UpdateCommand

      # this module adds methods #update and "#{resource_name}_update" (they are synonyms).
      # We need second method name to forward methods from MongoConnector to resources connectors.

      def self.included(base)
        resource_name = StringHelper.underscore_class(base)
        method_name = "#{resource_name}_update".to_sym
        alias_method method_name, :update
      end

      def update(record)
        record.validate!
        collection.update({"_id" => record.id}, record.to_mongo_hash)
      rescue Mongo::OperationFailure => e
        if e.message =~ /^11000/
          resource_name = StringHelper.underscore_class(record.class)
          raise InvalidRecord.new("Duplicate key error: #{resource_name} with id '#{record.id}'")
        end
      end

    end
  end
end