#!/usr/bin/perl
# -*- encoding: utf-8; indent-tabs-mode: nil -*-
#
#     Example of Date::Convert::French_Rev script to print a French Revolutionary calendar
#     Copyright (C) 2001-2003, 2013, 2015 Jean Forget
#
#     See the license in the embedded documentation below.
#
use strict;
use warnings;
use FindBin;
use Getopt::Long;
use Date::Convert::French_Rev;
use Roman;

my $lang = 'en';
my $pict = undef;
GetOptions('lang=s' => \$lang, 'kitten=s' => \$pict);

#
# I18N
#
my $ref_labels;
if ($lang eq 'fr')
  { $ref_labels = do "$FindBin::Bin/labels_fr" }
else
  { $ref_labels = do "$FindBin::Bin/labels_en" }
my %labels = %$ref_labels;

my $annee;
foreach $annee (@ARGV)
  {
    warn "Invalid year", next if $annee <= 0;
    prt_cal ($annee);
  }


sub prt_cal {
  my $year   = $_[0];           # French revolutionary year
  my $year_1 = $year + 1791;    # first corresponding Gregorian year
  my $year_2 = $year + 1792;    # second corresponding Gregorian year

  # HTML header
  print <<"EOT";
<html>
<head>
<title>$labels{calendar}</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
EOT
  print qq(<p align='center'><img src='$pict'>\n) if $pict;
  # Column headers for the first six months
  print <<"EOT";
<h2 align='center'>@{[ Roman $year ]}</h2>
<h3 align='center'>$year_1-$year_2</h3>
<table border width='90%'>
<tr align='center'>
<td>Vendémiaire<br>$labels{month3}[8]-$labels{month3}[9]</td>
<td>Brumaire<br>$labels{month3}[9]-$labels{month3}[10]</td>
<td>Frimaire<br>$labels{month3}[10]-$labels{month3}[11]</td>
<td>Nivôse<br>$labels{month3}[11]-$labels{month3}[0]</td>
<td>Pluviôse<br>$labels{month3}[0]-$labels{month3}[1]</td>
<td>Ventôse<br>$labels{month3}[1]-$labels{month3}[2]</td>
</tr>
EOT

  # Building the first six months
  my $row = '';
  foreach my $m (1..6)
    {
      my $cell = join '<br>', map { one_day($year, $m, $_) } (1..30);
      $row .= "<td><pre><br>$cell</pre></td>\n";
    }

  # Printing the first six months and the headers for the last six months
  print <<"EOT";
<tr align='center'>$row</tr>
<tr align='center'>
<td>Germinal<br>$labels{month3}[2]-$labels{month3}[3]</td>
<td>Floréal<br>$labels{month3}[3]-$labels{month3}[4]</td>
<td>Prairial<br>$labels{month3}[4]-$labels{month3}[5]</td>
<td>Messidor<br>$labels{month3}[5]-$labels{month3}[6]</td>
<td>Thermidor<br>$labels{month3}[6]-$labels{month3}[7]</td>
<td>Fructidor<br>$labels{month3}[7]-$labels{month3}[8]</td>
</tr>
EOT

  # Building the "-al" and "-idor" months
  $row = "";
  foreach my $m (7..12)
    {
      my $cell = join '<br>', map { one_day($year, $m, $_) } (1..30);
      $row .= "<td><pre><br>$cell</pre></td>\n";
    }
  print "<tr align='center'>$row</tr>\n";
  
  # Additional days.
  # By the way, how many additional days? 5 (normal year) or 6 (leap year)?
  my $last = 5;
  $last = 6 if is_leap Date::Convert::French_Rev $year;
  # The additional days are printed in an horizontal row, one per cell
  $row = "";
  foreach my $rd (1 .. $last)
    { $row .= "<td><pre><br>" . one_day($year, 13, $rd) . "</pre></td>\n" }
  print <<"EOT";
<tr align='center'><td colspan='6'>$labels{add_days}</td></tr>
<tr align='center'>$row</tr>
</table></body></html>
EOT
}

sub one_day {
  my ($ry, $rm, $rd) = @_; # Revolutionary year, month and day
  my ($gd, $wd);           # Gregorian day number and weekday letter
  my $day = new Date::Convert::French_Rev($ry, $rm, $rd);
  convert Date::Convert::Gregorian $day;
  $gd = $day->day();
  $wd = $labels{week1}[$day->absol() % 7];
  sprintf "%2d (%s %2d)", $rd, $wd, $gd;
}

__END__

=encoding utf8

=head1 NAME

prt_cal -- print a French Revolutionary calendar

=head1 SYNOPSIS

  prt_cal [--lang=I<language>] [--kitten=I<file>] year

=head1 DESCRIPTION

This  program  prints  a  calendar,  using  the  French  Revolutionary
calendar.   It is  not  limited  to the  historical  period when  this
calendar was in use, you can ask for any year after its beginning. For
example,  you  can  print  the   calendar  for  the  year  211,  which
corresponds to 2002-2003  in the Gregorian calendar. The  output is in
HTML,  and  contains  brief   indications  for  which  Gregorian  date
corresponds to each French Revolutionary date.

=head1 OPTIONS

=over 4

=item language

Some  values  are  language  dependant:  Gregorian  weekday  initials,
Gregorian month abbreviations  and a few titles. You  can select which
language you will use.  Known languages are:

=over 4

=item en

English (default)

=item fr

French

=back

=item kitten

In France, traditionnally, the  postal service sells calendars for the
next year during November / December. These calendars usually have the
picture  of  one  or  more  kittens  in a  basket,  or  a  mountainous
landscape. So, you can do the  same with this program, by specifying a
JPEG or GIF  URL, which contains the photo of kittens  or a picture of
mountains.  Don't  even  think  of  using  anything  else,  especially
pictures involving scantily clad ladies.

You can try

  http://images.google.com/images?hl=en&lr=&ie=ISO-8859-1&output=search&q=kitten+basket
  http://images.google.com/images?hl=en&lr=&ie=ISO-8859-1&output=search&q=mountains

but do not even think about

  http://images.google.com/images?q=Delacroix+libert%C3%A9+guidant+peuple&hl=en&lr=&ie=UTF-8&output=search

=back

=head1 PARAMETERS

There is a single parameter, the year, according to the French
Revolutionary calendar. This parameter is numeric
(Roman number not permitted).

=head1 KNOWN BUGS

If given several years, the program prints all the requested calendars
on standard output as a single stream. There are HTML delimiters for
each, but they are concatenated.

=head1 AUTHOR

Jean Forget <JFORGET@cpan.org>

=head1 LICENSE

Copyright (c)  2001, 2002, 2003,  2013, 2015 Jean Forget.   All rights
reserved.  This program is free software.  You can distribute, modify,
and otherwise mangle  F<prt_cal> under the same terms  as Perl 5.16.3:
GNU Public License version 1 or later and Perl Artistic License

You can  find the text  of the licenses  in the F<LICENSE> file  or at
L<http://www.perlfoundation.org/artistic_license_1_0> and
L<http://www.gnu.org/licenses/gpl-1.0.html>.

Here is the summary of GPL:

This program is  free software; you can redistribute  it and/or modify
it under the  terms of the GNU General Public  License as published by
the Free  Software Foundation; either  version 1, or (at  your option)
any later version.

This program  is distributed in the  hope that it will  be useful, but
WITHOUT   ANY  WARRANTY;   without  even   the  implied   warranty  of
MERCHANTABILITY  or FITNESS  FOR A  PARTICULAR PURPOSE.   See  the GNU
General Public License for more details.

You  should have received  a copy  of the  GNU General  Public License
along  with  this  program;  if   not,  write  to  the  Free  Software
Foundation, Inc.,  59 Temple Place, Suite 330,  Boston, MA 02111-1307,
USA.

=cut
