NAME
iCal::Parser - Parse iCalendar files into a data structure
SYNOPSIS
use iCal::Parser
my $parser=iCal::Parser->new();
my $hash=$parser->parse($file);
$parser->parse($another_file);
my $combined=$parser->calendar;
my $combined=iCal::Parser->new->parse(@files);
my $combined=iCal::Parser->new->parse_files(@files);
my $combined=iCal::Parser->new->parse_strings(@strings);
DESCRIPTION
This module processes iCalendar (vCalendar 2.0) files as specified in
RFC 2445 into a data structure. It handles recurrences (`RRULE's),
exclusions (`EXDATE's), event updates (events with a `RECURRENCE-ID'),
and nested data structures (`ATTENDEES' and `VALARM's). It currently
ignores the `VTIMEZONE', `VJOURNAL' and `VFREEBUSY' entry types.
The data structure returned is a hash like the following:
{
calendars=>[\%cal, ...],
events=>{yyyy=>{mm=>{dd}=>{UID=>\%event}}
todos=>[\%todo, ...]
}
That is, it contains an array of calendar hashes, a hash of events key
by `year=>month=>day=>eventUID', and an array of todos.
Calendars, events and todos are "rolled up" version os the hashes
returned from Text::vFile::asData, with dates replaced by `DateTime'
objects.
During parsing, events in the input calendar are expanded out into
multiple events, one per day covered by the event, as follows:
* If the event is a one day "all day" event (in ical, the event is
24hrs long, starts at midnight on the day and ends a midnight of the
next day), it contains no `hour' field and the `allday' field is set
to `1'.
* If the event is a recurrence (`RRULE'), one event per day is created
as per the `RRULE' specification.
* If the event spans more than one day (the start and end dates are on
different days, but does not contain an `RRULE'), it is expanded
into multiple events, the first events end time is set to midnight,
subsequent events are set to start at midnight and end at midnight
the following day (same as an "allday" event, but the `allday' field
is not set), and the last days event is set to run from midnight to
the end time of the original multi-day event.
* If the event is an update (it contains a `RECURRENCE-ID'), the
original event is updated. If the referenced event does not exist
(e.g., it was deleted after the update), then the event is added as
a new event.
An example of each hash is below.
Calendar Hash
{
'X-WR-CALNAME' => 'Test',
'index' => 1,
'X-WR-RELCALID' => '7CCE8555-3516-11D9-8A43-000D93C45D90',
'PRODID' => '-//Apple Computer\\, Inc//iCal 1.5//EN',
'CALSCALE' => 'GREGORIAN',
'X-WR-TIMEZONE' => 'America/New_York',
'X-WR-CALDESC' => 'My Test Calendar',
'VERSION' => '2.0'
}
Event Hash
Note that `hours' and `allday' are mutually exclusive in the actual
data. The `idref' field contains the `id' of the calendar the event came
from, which is useful if the hash was created from multiple calendars.
{
'SUMMARY' => 'overnight',
'hours' => '15.00',
'allday' => 1,
'UID' => '95CCBF98-3685-11D9-8CA5-000D93C45D90',
'idref' => '7CCE8555-3516-11D9-8A43-000D93C45D90',
'DTSTAMP' => \%DateTime,
'DTEND' => \%DateTime,
'DTSTART' => \%DateTime
'ATTENDEE' => [
{
'CN' => 'Jay',
'value' => 'mailto:jayl@my.server'
},
],
'VALARM' => [
{
'when' => \%DateTime,
'SUMMARY' => 'Alarm notification',
'ACTION' => 'EMAIL',
'DESCRIPTION' => 'This is an event reminder',
'ATTENDEE' => [
{
'value' => 'mailto:cpan@my.server'
}
]
}
],
}
Todo Hash
{
'URL' => 'mailto:me',
'SUMMARY' => 'todo 1',
'UID' => 'B78E68F2-35E7-11D9-9E64-000D93C45D90',
'idref' => '7CCE8555-3516-11D9-8A43-000D93C45D90',
'STATUS' => 'COMPLETED',
'COMPLETED' => \%DateTime,
'DTSTAMP' => \%DateTime,
'PRIORITY' => '9',
'DTSTART' => \%DateTime,
'DUE' => \%DateTime,
'DESCRIPTION' => 'not much',
'VALARM' => [
{
'when' => \%DateTime,
'ATTACH' => 'file://localhost/my-file',
'ACTION' => 'PROCEDURE'
}
],
},
Methods
new(%opt_args)
Optional Arguments
start {yyymmdd|DateTime}
Only include events on or after `yyymmdd'. Defaults to Jan of this
year.
end {yyyymmdd|DateTime}
Only include events before `yyymmdd'.
no_events
Don't include events in the output (todos only).
no_todos
Don't include todos in the output (events only).
months n
DateTime::Sets (used for calculating recurrences) are limited to
approximately 200 entries. If an `end' date is not specified, the
`to' date is set to the `start' date plus this many months. The
default is 60.
tz (string|DateTime::TimeZone)
Use tz as timezone for date values. The default is 'local', which
will adjust the parsed dates to the current timezone.
debug
Set to non-zero for some debugging output during processing.
parse({file|file_handle}+)
Parse the input files or opened file handles and return the generated
hash.
This function can be called mutitple times and the calendars will be
merge into the hash, each event tagged with the unique id of its
calendar.
parse_files({file|file_handle}+)
Alias for `parse()'
parse_strings(string+)
Parse the input strings (each assumed to be a valid iCalendar) and
return the generated hash.
AUTHOR
Rick Frankel, cpan@rickster.com
COPYRIGHT
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.
SEE ALSO
Text::vFile::asData, DateTime::Set, DateTime::Span, iCal::Parser::SAX