If you already have the periods in Time::Period's format, it should be trivial to write a version of Time::Period's functions which returns DateTime::SpanSets instead of booleans. For example, below are the guts of the wd and hr. 

sub wd {
   my ($min, $max) = @_

   return DateTime::SpanSet->from_set_and_duration(
      set => DateTime::Set->from_recurrence(
         recurrence => sub {
            my ($dt) = @_;
            return $dt->truncate(to => 'day')
                      ->add(days => ($min-$dt->wday()+7-1) % 7 + 1);
         },
      ),
      days => $max-$min+1,
   );
}


sub hr {
   my ($min, $max) = @_

   return DateTime::SpanSet->from_set_and_duration(
      set => DateTime::Set->from_recurrence(
         recurrence => sub {
            my ($dt) = @_;

            $dt = $dt->add(days => 1)
               if $dt->hour() >= $min;

            return $dt->truncate(to => 'day')->set(hour => $min);
         },
      ),
      hours => $max-$min+1,
   )
}


# M-F, 9am to 5pm
# wd {mo-fr} hr {9-16}
my $sla_period = wd(1,5)->intersection(hr(9, 16));

[download]

Still untested.

In reply to Re: Time::Period overlaps? by ikegami
in thread Time::Period overlaps? by merzy

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