NAME

       Data::ICal::Entry - Represents an entry in an iCalendar file

SYNOPSIS

           my $vtodo = Data::ICal::Entry::Todo->new();
           $vtodo->add_property(
           # ... see Data::ICal::Entry::Todo documentation
           );
           $vtodo->add_properties( ... );

           $calendar->add_entry($vtodo);

           $event->add_entry($alarm);
           $event->add_entries($alarm1, ...);

           # or all in one go
           my $vtodo = Data::ICal::Entry::Todo->new( \%props, \@entries );

DESCRIPTION

       A Data::ICal::Entry object represents a single entry in an iCalendar file.  (Note that the
       iCalendar RFC refers to entries as "components".)  iCalendar defines several types of
       entries, such as events and to-do lists; each of these corresponds to a subclass of
       Data::ICal::Entry (though only to-do lists and events are currently implemented).
       Data::ICal::Entry should be treated as an abstract base class -- all objects created
       should be of its subclasses.  The entire calendar itself (the Data::ICal object) is also
       represented as a Data::ICal::Entry object.

       Each entry has an entry type (such as "VCALENDAR" or "VEVENT"), a series of "properties",
       and possibly some sub-entries.  (Only the root Data::ICal object can have sub-entries,
       except for alarm entries contained in events and to-dos (not yet implemented).)

METHODS

   new
       Creates a new entry object with no properties or sub-entries.

   as_string [ crlf => "CRLF" ]
       Returns the entry as an appropriately formatted string (with trailing newline).

       Properties are returned in alphabetical order, with multiple properties of the same name
       returned in the order added.  (Property order is unimportant in iCalendar, and this makes
       testing easier.)

       If any mandatory property is missing, issues a warning.

       The string to use as a newline can optionally be specified by giving the a "crlf"
       argument, which defaults to "\x0d\x0a", per RFC 2445 spec; this option is primarily for
       backwards compatibility with versions of this module before 0.16.

   add_entry $entry
       Adds an entry to this entry.  (According to the standard, this should only be called on
       either a to-do or event entry with an alarm entry, or on a calendar entry (Data::ICal)
       with a to-do, event, journal, timezone, or free/busy entry.)

       Returns true if the entry was successfully added, and false otherwise (perhaps because you
       tried to add an entry of an invalid type, but this check hasn't been implemented yet).

   add_entries $entry1, [$entry2, ...]
       Convenience function to call "add_entry" several times with a list of entries.

   entries
       Returns a reference to the array of subentries of this entry.

   properties
       Returns a reference to the hash of properties of this entry.  The keys are property names
       and the values are array references containing Data::ICal::Property objects.

   property
       Given a property name returns a reference to the array of Data::ICal::Property objects.

   add_property $propname => $propval
       Creates a new Data::ICal::Property object with name $propname and value $propval and adds
       it to the event.

       If the property is not known to exist for that object type and does not begin with "X-",
       issues a warning.

       If the property is known to be unique, replaces the original property.

       To specify parameters for the property, let $propval be a two-element array reference
       where the first element is the property value and the second element is a hash reference.
       The keys of the hash are parameter names; the values should be either strings or array
       references of strings, depending on whether the parameter should have one or multiple (to
       be comma-separated) values.

       Examples of setting parameters:

        # Add a property with a parameter of VALUE set to 'DATE'
        $event->add_property( rdate => [ $date, { VALUE => 'DATE' } ] );

   add_properties $propname1 => $propval1, [$propname2 => $propname2, ...]
       Convenience function to call "add_property" several times with a list of properties.

       This method is guaranteed to call add "add_property" on them in the order given, so that
       unique properties given later in the call will take precedence over those given earlier.
       (This is unrelated to the order of properties when the entry is rendered as a string,
       though.)

       Parameters for the properties are specified in the same way as in "add_property".

   mandatory_unique_properties
       Subclasses should override this method (which returns an empty list by default) to provide
       a list of lower case strings identifying the properties which must appear exactly once in
       the subclass's entry type.

   mandatory_repeatable_properties
       Subclasses should override this method (which returns an empty list by default) to provide
       a list of lower case strings identifying the properties which must appear at least once in
       the subclass's entry type.

   optional_unique_properties
       Subclasses should override this method (which returns an empty list by default) to provide
       a list of lower case strings identifying the properties which must appear at most once in
       the subclass's entry type.

   optional_repeatable_properties
       Subclasses should override this method (which returns an empty list by default) to provide
       a list of lower case strings identifying the properties which may appear zero, one, or
       more times in the subclass's entry type.

   is_property $name
       Returns a boolean value indicating whether or not the property $name is known to the class
       (that is, if it's listed in "(mandatory/optional)_(unique/repeatable)_properties").

   is_mandatory $name
       Returns a boolean value indicating whether or not the property $name is known to the class
       as mandatory (that is, if it's listed in "mandatory_(unique/repeatable)_properties").

   is_optional $name
       Returns a boolean value indicating whether or not the property $name is known to the class
       as optional (that is, if it's listed in "optional_(unique/repeatable)_properties").

   is_unique $name
       Returns a boolean value indicating whether or not the property $name is known to the class
       as unique (that is, if it's listed in "(mandatory/optional)_unique_properties").

   is_repeatable $name
       Returns a boolean value indicating whether or not the property $name is known to the class
       as repeatable (that is, if it's listed in "(mandatory/optional)_repeatable_properties").

   ical_entry_type
       Subclasses should override this method to provide the identifying type name of the entry
       (such as "VCALENDAR" or "VTODO").

   vcal10 [$bool]
       Gets or sets a boolean saying whether this entry should be interpreted as vCalendar 1.0
       (as opposed to iCalendar 2.0).  Generally, you can just set this on your main Data::ICal
       object when you construct it; "add_entry" automatically makes sure that sub-entries end up
       with the same value as their parents.

   header
       Returns the header line for the entry (including trailing newline).

   footer
       Returns the footer line for the entry (including trailing newline).

   parse_object
       Translate a Text::vFile::asData sub object into the appropriate Data::iCal::Event subtype.

AUTHOR

       Jesse Vincent "<jesse@bestpractical.com>" with David Glasser, Simon Wistow, and Alex
       Vandiver

LICENCE AND COPYRIGHT

       Copyright (c) 2005 - 2009, Best Practical Solutions, LLC.  All rights reserved.

       This module is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself. See perlartistic.

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