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# we need to comment this out or PAUSE might index it
# pack age DateTime::Format::ICal;
use strict;
use DateTime;
# Builder relevant stuff starts here.
use DateTime::Format::Builder parsers => {
parse_datetime => [
[ preprocess => \&_parse_tz ],
{
length => 15,
params => [qw( year month day hour minute second )],
regex => qr/^(\d\d\d\d)(\d\d)(\d\d)T(\d\d)(\d\d)(\d\d)$/,
},
{
length => 13,
params => [qw( year month day hour minute )],
regex => qr/^(\d\d\d\d)(\d\d)(\d\d)T(\d\d)(\d\d)$/,
},
{
length => 11,
params => [qw( year month day hour )],
regex => qr/^(\d\d\d\d)(\d\d)(\d\d)T(\d\d)$/,
},
{
length => 8,
params => [qw( year month day )],
regex => qr/^(\d\d\d\d)(\d\d)(\d\d)$/,
},
],
};
sub _parse_tz {
my %args = @_;
my ( $date, $p ) = @args{qw( input parsed )};
if ( $date =~ s/^TZID=([^:]+):// ) {
$p->{time_zone} = $1;
}
# Z at end means UTC
elsif ( $date =~ s/Z$// ) {
$p->{time_zone} = 'UTC';
}
else {
$p->{time_zone} = 'floating';
}
return $date;
}
# Builder relevant stuff ends here.
sub parse_duration {
my ( $self, $dur ) = @_;
my @units = qw( weeks days hours minutes seconds );
$dur =~ m{ ([\+\-])? # Sign
P # 'P' for period? This is our magic character)
(?:
(?:(\d+)W)? # Weeks
(?:(\d+)D)? # Days
)?
(?: T # Time prefix
(?:(\d+)H)? # Hours
(?:(\d+)M)? # Minutes
(?:(\d+)S)? # Seconds
)?
}x;
my $sign = $1;
my %units;
$units{weeks} = $2 if defined $2;
$units{days} = $3 if defined $3;
$units{hours} = $4 if defined $4;
$units{minutes} = $5 if defined $5;
$units{seconds} = $6 if defined $6;
die "Invalid ICal duration string ($dur)\n"
unless %units;
if ( $sign eq '-' ) {
$_ *= -1 foreach values %units;
}
return DateTime::Duration->new(%units);
}
sub format_datetime {
my ( $self, $dt ) = @_;
my $tz = $dt->time_zone;
unless ( $tz->is_floating || $tz->is_utc || $tz->name ) {
$dt = $dt->clone->set_time_zone('UTC');
$tz = $dt->time_zone;
}
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 )
);
return $base if $tz->is_floating;
return $base . 'Z' if $tz->is_utc;
return 'TZID=' . $tz->name . ':' . $base;
}
sub format_duration {
my ( $self, $duration ) = @_;
die "Cannot represent years or months in an iCal duration\n"
if $duration->delta_months;
# simple string for 0-length durations
return '+PT0S'
unless $duration->delta_days || $duration->delta_seconds;
my $ical = $duration->is_positive ? '+' : '-';
$ical .= 'P';
if ( $duration->delta_days ) {
$ical .= $duration->weeks . 'W' if $duration->weeks;
$ical .= $duration->days . 'D' if $duration->days;
}
if ( $duration->delta_seconds ) {
$ical .= 'T';
$ical .= $duration->hours . 'H' if $duration->hours;
$ical .= $duration->minutes . 'M' if $duration->minutes;
$ical .= $duration->seconds . 'S' if $duration->seconds;
}
return $ical;
}
1;
|
