query_builder.rb

require 'uri'

module Quickbooks
  module Util
    class QueryBuilder

      VALUE_QUOTE = "'"

      def initialize
      end

      def clause(field, operator, value)
        value = case value
                when DateTime, Time
                  value.iso8601
                when Date
                  value.strftime('%Y-%m-%d')
                when Array
                  value = value.map{|v| v.to_s.gsub("'", "\\\\'") }
                else
                  # escape single quotes with an escaped backslash
                  value = value.to_s.gsub("'", "\\\\'")
                end

        if operator.downcase == 'in' && value.is_a?(Array)
          value = value.map{|v| "#{VALUE_QUOTE}#{v}#{VALUE_QUOTE}"}
          "#{field} #{operator} (#{value.join(', ')})"
        else
          "#{field} #{operator} #{VALUE_QUOTE}#{value}#{VALUE_QUOTE}"
        end
      end

    end
  end
end