# Selima Website Content Management System
# CopyYear.pm: The copyright year text generator.

#  Copyright (c) 2004-2018 imacat.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

# Author: imacat <imacat@mail.imacat.idv.tw>
# First written: 2004-10-17

package Selima::CopyYear;
use 5.008;
use strict;
use warnings;
use base qw(Exporter);
use vars qw(@EXPORT @EXPORT_OK);
BEGIN {
@EXPORT = qw(copyyear);
@EXPORT_OK = @EXPORT;
# Prototype declaration
sub copyyear($);
}

use Selima::Cache qw(:copyyear);
use Selima::DataVars qw(:proctime);

# copyyear: Return the copyright year
sub copyyear($) {
    local ($_, %_);
    my ($startyear, $thisyear);
    $startyear = $_[0];
    # Return the cache
    return $CopyYear_copyyear if defined $CopyYear_copyyear;
    $thisyear = (localtime $T_START)[5] + 1900;
    $CopyYear_copyyear = $startyear;
    $CopyYear_copyyear .= "-" . $thisyear
        if $thisyear != $startyear;
    return $CopyYear_copyyear;
}

return 1;