#!/usr/bin/perl -w
use strict;
use CGI qw(:standard);

my ($block_ref, $event_ref) = get_block();
print header(), start_html("Block Order Script"),
      h1("The Next Block Order is: ");
my ($hour, $min, $day, $dotw) = (localtime)[2, 1, 7, 6];
my $time = sprintf "%02d%02d", $hour, $min;

# Comments explained: (U M T W R F S) maps to (Sun Mon ... Sat)
# If it's MTWR, and past 2:11pm, display tomorrow.
if ((grep {$dotw == $_} (1, 2, 3, 4)) && $time > 1411) { $day++ }
# If it's SU, display M.
elsif (grep {$dotw == $_} (6, 0)) {
   my $adj = $dotw / 6 + 1;
   $day += $adj;
}
# If it's F, and past 2:11pm, display M.
elsif ($dotw == 5 && $time > 1411) { $day += 3 }

print p($block_ref->[$day]);
print p($event_ref->[$day]);

print end_html;

sub get_block {
   my (@blocks, @events);
   open (BLOCK, "block.db") or die "$!";
   while (my $date = <BLOCK>) {
      chomp ($date);
      chomp ($blocks[$date] = <BLOCK>);
      chomp ($events[$date] = <BLOCK>);
   }
   close (BLOCK);
   return (\@blocks, \@events);
}