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# we need to comment this out or PAUSE might index it
# pack age DateTime::Format::W3CDTF;
use strict;
use DateTime::Format::Builder (
parsers => {
parse_datetime => [
[ preprocess => \&_parse_tz ],
{
params => [qw( year month day hour minute second)],
regex =>
qr/^(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)\.(\d\d)$/,
length => 22,
},
{
params => [qw( year month day hour minute second)],
regex => qr/^(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)$/,
length => 19,
},
{
params => [qw( year month day hour minute)],
regex => qr/^(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d)$/,
length => 16,
},
{
params => [qw( year month day )],
regex => qr/^(\d{4})-(\d\d)-(\d\d)$/,
length => 10,
},
{
params => [qw( year month )],
regex => qr/^(\d{4})-(\d\d)$/,
length => 7,
extra => { day => 1 },
},
{
params => [qw( year )],
regex => qr/^(\d\d\d\d)$/,
length => 4,
extra => { month => 1, day => 1 }
}
]
}
);
sub _parse_tz {
my %args = @_;
my ( $date, $p ) = @args{qw( input parsed )};
if ( $date =~ s/([+-]\d\d:\d\d)$// ) {
$p->{time_zone} = $1;
}
# Z at end means UTC
elsif ( $date =~ s/Z$// ) {
$p->{time_zone} = 'UTC';
}
else {
$p->{time_zone} = 'floating';
}
return $date;
}
sub format_datetime {
my ( $self, $dt ) = @_;
my $base = (
$dt->hour || $dt->min || $dt->sec
? sprintf(
'%04d-%02d-%02dT%02d:%02d:%02d',
$dt->year, $dt->month, $dt->day,
$dt->hour, $dt->minute, $dt->second
)
: sprintf( '%04d-%02d-%02d', $dt->year, $dt->month, $dt->day )
);
my $tz = $dt->time_zone;
return $base if $tz->is_floating;
# if there is a time component
if ( $dt->hour || $dt->min || $dt->sec ) {
return $base . 'Z' if $tz->is_utc;
if ( $tz->{'offset'} ) {
return $base . offset_as_string( $tz->{'offset'} );
}
}
else {
return $base;
}
}
# minor offset_as_string variant w/ :
#
sub offset_as_string {
my $offset = shift;
return undef unless defined $offset;
my $sign = $offset < 0 ? '-' : '+';
my $hours = $offset / ( 60 * 60 );
$hours = abs($hours) % 24;
my $mins = ( $offset % ( 60 * 60 ) ) / 60;
my $secs = $offset % 60;
return (
$secs
? sprintf( '%s%02d:%02d:%02d', $sign, $hours, $mins, $secs )
: sprintf( '%s%02d:%02d', $sign, $hours, $mins )
);
}
1;
__END__
=head1 NAME
DateTime::Format::W3CDTF - Parse and format W3CDTF datetime strings
=head1 SYNOPSIS
use DateTime::Format::W3CDTF;
my $f = DateTime::Format::W3CDTF->new;
my $dt = $f->parse_datetime( '2003-02-15T13:50:05-05:00' );
# 2003-02-15T13:50:05-05:00
$f->format_datetime($dt);
=head1 DESCRIPTION
This module understands the W3CDTF date/time format, an ISO 8601 profile,
defined at http://www.w3.org/TR/NOTE-datetime. This format as the native
date format of RSS 1.0.
It can be used to parse these formats in order to create the appropriate
objects.
=head1 METHODS
This API is currently experimental and may change in the future.
=over 4
=item * parse_datetime($string)
Given a W3CDTF datetime string, this method will return a new
C<DateTime> object.
If given an improperly formatted string, this method may die.
=item * format_datetime($datetime)
Given a C<DateTime> object, this methods returns a W3CDTF datetime
string.
=back
=head1 SUPPORT
Support for this module is provided via the datetime@perl.org email
list. See http://lists.perl.org/ for more details.
=head1 AUTHOR
Kellan Elliott-McCrea <kellan@protest.net>
This module was inspired by C<DateTime::Format::ICal>
=head1 COPYRIGHT
Copyright (c) 2003 Kellan Elliott-McCrea. All rights reserved. This program
is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.
The full text of the license can be found in the LICENSE file included
with this module.
=head1 SEE ALSO
datetime@perl.org mailing list
http://datetime.perl.org/
=cut
|
