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lib/Data/ICal/Entry/Todo.pm  view on Meta::CPAN

use warnings;
use strict;

package Data::ICal::Entry::Todo;

use base qw/Data::ICal::Entry/;

=head1 NAME

Data::ICal::Entry::Todo - Represents a to-do entry in an iCalendar file

=head1 SYNOPSIS

    my $vtodo = Data::ICal::Entry::Todo->new();
    $vtodo->add_properties(
        summary   => "go to sleep",
        status    => 'INCOMPLETE',
        # Dat*e*::ICal is not a typo here
        dtstart   => Date::ICal->new( epoch => time )->ical,
    );

    $calendar->add_entry($vtodo);

    $vtodo->add_entry($alarm);

=head1 DESCRIPTION

A L<Data::ICal::Entry::Todo> object represents a single to-do entry in
an iCalendar file.  (Note that the iCalendar RFC refers to entries as
"components".)  It is a subclass of L<Data::ICal::Entry> and accepts
all of its methods.

=head1 METHODS

=cut

=head2 ical_entry_type

Returns C<VTODO>, its iCalendar entry name.

=cut

sub ical_entry_type {'VTODO'}

=head2 mandatory_unique_properties

The C<uid> property is mandatory if C<rfc_strict> was passed to
L<Data::ICal/new>.

=cut

sub mandatory_unique_properties {
    my $self = shift;
    return $self->rfc_strict ? ("uid") : ()
}

=head2 optional_unique_properties

According to the iCalendar standard, the following properties may be
specified at most one time for a to-do item:

      class  completed  created  description  dtstamp
      dtstart  geo  last-modified  location  organizer
      percent-complete  priority  recurrence-id  sequence  status
      summary  uid  url

In addition, C<due> and C<duration> may be specified at most once
each, but not both in the same entry (though this restriction is not
enforced).

Or if C<< vcal10 => 1 >>:

        class dcreated completed description dtstart due
        last-modified location rnum priority
        sequence status summary transp
        url uid

=cut

sub optional_unique_properties {
    my $self = shift;
    my @ret = $self->rfc_strict ? () : ("uid");