From: Paul Wright <wrighty@...>
Date: 2006-11-10T06:32:33+09:00
Subject: Re: Modifying Time with DPrecision to work with Runt

On 09/11/06, Lipper, Matthew <Mlipper@doitt.nyc.gov> wrote:

> > I added the code below (which is
> > pretty much identical to the DateTime modification included with Runt)
> > and now it works (plus it's a lot faster), but I'm wondering if
> > there's any unintended consequences I should be looking out for?
>
> None that I can think of.

Good to hear!

> > If not, would it make sense to include this in the Runt gem?
>
> Yes, definitely. Can you please send me either a failing test case
> demonstrating the issue or give me some more details about
> 'event.created_at' ('event.created_at' returns a Time instance, true?).
>
> Either way I will be happy to add it.

event is an ActiveRecord object and created_at is a Time instance,
thus trying to see if falls within a TemporalExpression doesn't work
as Time doesn't have a date_precision method.

Not sure this is exactly what you need but hopefully it gets the point
across.  If you run the code below as-is, it will raise:

NoMethodError: undefined method 'date_precision' for Mon Nov 06
07:38:00 GMT 2006:Time

However if the code modifying Time is uncommented then passing Time
objects to still_there? appear to work fine.

Hope it all makes sense,

Paul.


require 'rubygems'
require 'runt'

# class Time
#  include Runt::DPrecision
#
#  attr_accessor :date_precision
#
#  def date_precision
#    return @date_precision unless @date_precision.nil?
#    return Runt::DPrecision::DEFAULT
#  end
# end

class WorkingHours
  include Runt

  def initialize
    monday = DIWeek.new(Mon) & REDay.new(9,30,17,30)
    tues_to_fri = REWeek.new(Tue, Fri) & REDay.new(9,00,17,30)
    @runt_exp =  monday | tues_to_fri
  end

  def still_there?(time)
    @runt_exp.include? time
  end

end

stuck_at_work = WorkingHours.new

in_the_land_of_nod    = Time.parse('Monday 06 November 2006 07:38')
a_case_of_the_mondays = Time.parse('Monday 06 November 2006 13:37')
clock_watching        = Time.parse('Friday 10 November 2006 16:59')
down_the_pub          = Time.parse('Friday 10 November 2006 17:31')


p stuck_at_work.still_there?( in_the_land_of_nod )    #=> false
p stuck_at_work.still_there?( a_case_of_the_mondays ) #=> true
p stuck_at_work.still_there?( clock_watching )        #=> true
p stuck_at_work.still_there?( down_the_pub )          #=> false