NAME
    Data::ICal - Generates iCalendar (RFC 2445) calendar files

INSTALLATION
        perl Makefile.PL
        make
        make test
        make install

SYNOPSIS
        use Data::ICal;

        my $calendar = Data::ICal->new();

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

        # ... or
        $calendar = Data::ICal->new(filename => 'foo.ics'); # parse existing file
        $calendar = Data::ICal->new(data => 'BEGIN:VCALENDAR...'); # parse from scalar
        $calendar->add_entry($vtodo);
        print $calendar->as_string;

DESCRIPTION
    A Data::ICal object represents a "VCALENDAR" object as defined in the
    iCalendar protocol (RFC 2445, MIME type "text/calendar"), as implemented
    in many popular calendaring programs such as Apple's iCal.

    Each Data::ICal object is a collection of "entries", which are objects
    of a subclass of Data::ICal::Entry. The types of entries defined by
    iCalendar (which refers to them as "components") include events, to-do
    items, journal entries, free/busy time indicators, and time zone
    descriptors; in addition, events and to-do items can contain alarm
    entries. (Currently, Data::ICal only implements to-do items and events.)

    Data::ICal is a subclass of Data::ICal::Entry; see its manpage for more
    methods applicable to Data::ICal.

METHODS
  new [ data => $data, ] [ filename => $file ], [ vcal10 => $bool ]
    Creates a new Data::ICal object.

    If it is given a filename or data argument is passed, then this parses
    the content of the file or string into the object. If the "vcal10" flag
    is passed, parses it according to vCalendar 1.0, not iCalendar 2.0; this
    in particular impacts the parsing of continuation lines in
    quoted-printable sections.

    If a filename or data argument is not passed, this just sets its
    "VERSION" and "PRODID" properties to "2.0" (or "1.0" if the "vcal10"
    flag is passed) and the value of the "product_id" method respectively.

    Returns a false value upon failure to open or parse the file or data;
    this false value is a Class::ReturnValue object and can be queried as to
    its "error_message".

  parse [ data => $data, ] [ filename => $file, ]
    Parse a ".ics" file or string containing one, and populate $self with
    its contents.

    Should only be called once on a given object, and will be automatically
    called by "new" if you provide arguments to "new".

    Returns $self on success. Returns a false value upon failure to open or
    parse the file or data; this false value is a Class::ReturnValue object
    and can be queried as to its "error_message".

  ical_entry_type
    Returns "VCALENDAR", its iCalendar entry name.

  product_id
    Returns the product ID used in the calendar's "PRODID" property; you may
    wish to override this in a subclass for your own application.

  mandatory_unique_properties
    According to the iCalendar standard, the following properties must be
    specified exactly one time for a calendar:

          prodid version

  optional_unique_properties
    According to the iCalendar standard, the following properties may be
    specified at most one time for a calendar:

          calscale method

DEPENDENCIES
    Data::ICal requires Class::Accessor, Text::vFile::asData,
    MIME::QuotedPrint, and Class::ReturnValue.

BUGS AND LIMITATIONS
    Data::ICal does not support time zone daylight or standard entries, so
    time zone components are basically useless.

    While Data::ICal tries to check which properties are required and
    repeatable, this only works in simple cases; it does not check for
    properties that must either both exist or both not exist, or for
    mutually exclusive properties.

    Data::ICal does not check to see if property parameter names are known
    in general or allowed on the particular property.

    Data::ICal does not check to see if nested entries are nested properly
    (alarms in todos and events only, everything else in calendars only).

    The only property encoding supported by Data::ICal is quoted printable.

    There is no Data::ICal::Entry::Alarm base class.

    Please report any bugs or feature requests to
    "bug-data-ical@rt.cpan.org", or through the web interface at
    <http://rt.cpan.org>.

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

LICENCE AND COPYRIGHT
    Copyright (c) 2005 - 2020, 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.

DISCLAIMER OF WARRANTY
    BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
    FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
    OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
    PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
    EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
    ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
    YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
    NECESSARY SERVICING, REPAIR, OR CORRECTION.

    IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
    WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
    REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE
    TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR
    CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
    SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
    RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
    FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
    SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
    DAMAGES.

