1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
#!/usr/bin/perl -w
#
# What's Going On. Given one or more .ics files on the command line,
# produces a text report showing what's happening in the next six weeks.
#
# This was my main reason for working on this -- I've been producing things
# like this by hand for a mailing list of friends on and off for the past
# six years, and was too lazy to automate the damn thing.
#
# To see it in action, try fetching the london.pm calendar from
# http://london.pm.org/ical.ics, then run "perl wgo ical.ics"
#
# Nik Clayton, <nik@FreeBSD.org>
use strict;
use lib '../lib';
use Text::vFile::asData;
use DateTime;
use DateTime::Span;
use DateTime::Format::ICal;
use IO::File;
# Could use Lingua::*::Inflect, but it's overkill for a quick demo
# 1 2 3 4 5 6 7 8 9 10
my @inflect = qw(st nd rd th th th th th th th
th th th th th th th th th th
st nd rd th th th th th th th
st);
# Get the current time, and the time six weeks from now. Then build a
# DateTime::Span. We'll test every event we find to see if it, or any of
# it's recurrences, are inside this span. If they are, we need to include
# them in the output.
#
# Yes, start time and end time should be parameters to the script.
my $start_dt = DateTime->now();
my $end_dt = $start_dt + DateTime::Duration->new(weeks => 6);
my $span = DateTime::Span->from_datetimes(start => $start_dt,
end => $end_dt);
my @cals = (); # List of refs returned by parse()
my %events = (); # Events we're interested in. Key is
# date/time formatted as an ICal string,
# value is a list of events happening at
# that time.
foreach(@ARGV) {
push @cals, Text::vFile::asData->new->parse(IO::File->new($_));
}
foreach my $cal (@cals) {
foreach my $obj (@{ $cal->{objects}->[0]->{objects} }) {
next if $obj->{type} ne 'VEVENT'; # Not interested in non events
my %e = (); # Info about this event
my $p = $obj->{properties}; # The event's properties
next if ! defined $p->{SUMMARY}->[0]->{value};
$e{start} =
DateTime::Format::ICal->parse_datetime($p->{DTSTART}->[0]->{value});
if(defined $p->{DTEND}->[0]->{value}) {
$e{end} =
DateTime::Format::ICal->parse_datetime($p->{DTEND}->[0]->{value});
# iCal represents all-day events by using ;VALUE=DATE and setting
# DTEND=end_date + 1
$e{end}->subtract( days => 1 )
if $p->{DTEND}[0]{param}{VALUE} && $p->{DTEND}[0]{param}{VALUE} eq 'DATE'
} else {
$e{duration} =
DateTime::Format::ICal->parse_duration($p->{DURATION}[0]{value} || "PT1S" );
$e{end} = $e{start} + $e{duration};
}
$e{span} = DateTime::Span->from_datetimes(start => $e{start},
end => $e{end});
$e{summary} = $p->{SUMMARY}->[0]->{value};
$e{desc} = $p->{DESCRIPTION}->[0]->{value};
$e{desc} ||= '';
$e{summary} =~ s/\\(.)/$1/g; # Backslash escape removal
$e{desc} =~ s/\\(.)/$1/g;
# Handle event recurrences. If there's a recurrence rule (RRULE), then
# use that.
if(exists $p->{RRULE}) { # $e{recur} = DateTime::Set
$e{recur} =
DateTime::Format::ICal->parse_recurrence(recurrence => $p->{RRULE}->[0]->{value},
dtstart => $e{start});
} else {
# If the event is a multi-day event then synthesise copies of the
# event for every day on which it occurs.
#
# Why? Suppose you're looking at a 5 day span, and you have an
# event that starts on day 2 and finishes on day 4 (3 days in total).
# The ->iterator() considers that this is one occurence of the event,
# rather than 3. So create recurrences so the iterator behaves in a
# more useful fashion.
$e{recur} =
DateTime::Set->from_recurrence(
recurrence => sub {
$_[0]->truncate(to => 'day')->add(days => 1);
},
span => $e{span});
$e{recur} =
$e{recur}->union(DateTime::Set->from_datetimes(dates => [$e{start}]));
}
# Synthesise a flag that indicates that this is an all-day event. Not
# sure if this is the correct way of detecting this, but it works so
# far...
$e{allday} =
exists $p->{DTSTART}->[0]->{param}->{VALUE} and
$p->{DTSTART}->[0]->{param}->{VALUE} eq 'DATE' ? 1 : 0;
# Check to see if it's in the time span we're interested in
if($e{recur}->intersects($span)) {
my $int_set = $e{recur}->intersection($span);
# Change the event's recurrence details so that only the events
# inside the time span we're interested in are listed.
$e{recur} = $int_set;
my $iter = $int_set->iterator();
while(my $dt = $iter->next()) {
$e{dt} = $dt;
# Save a copy of the event (es = event saved), and store it in
# the list of event refs keyed off the ICal date
my %es = %e;
push @{$events{ $dt->ymd() }}, \%es;
}
}
}
}
my $e; # Hash ref of event info
my $last_ed = ''; # Last event date we processed
foreach my $ed (sort keys %events) { # $ed = event date ('yyyy-mm-dd')
foreach $e (sort by_type_time @{$events{$ed}}) {
# Build the first part of the output line. For the first event of the
# day include the date, month, and day abbreviation. For subsequent
# events on the same day this is the empty string. This makes for
# nicer output, as it's more obvious which events share a day.
if($ed ne $last_ed) { # First event of the day
$e->{startstring} = sprintf("%2d %s (%s)",
$e->{dt}->day(),
$e->{dt}->month_abbr(),
$e->{dt}->day_abbr());
} else { # Second and subsequent events
$e->{startstring} = '';
}
$last_ed = $ed;
# If it's not an all day event then the first part of the summary is
# the time the event occurs
$e->{summary} = sprintf("%02d:%02d - %02d:%02d, %s",
$e->{span}->start()->hour(),
$e->{span}->start()->minute(),
$e->{span}->end()->hour(),
$e->{span}->end()->minute(),
$e->{summary})
unless $e->{allday};
# If this is the second or subsequent appearance of a multi-day event,
# replace the description (if it exists) with a pointer to the first
# occurence of the description
if($e->{recur}->min()->ymd() ne $ed and $e->{desc} ne '') {
$e->{desc} = sprintf("See %d%s %s entry for details.",
$e->{recur}->min()->day(),
$inflect[$e->{recur}->min()->day() - 1],
$e->{recur}->min()->month_abbr());
}
$e->{summary} = punctuate($e->{summary}) . ' ' .
punctuate($e->{desc}) if $e->{desc} ne '';
write;
}
}
exit;
sub by_type_time { # For sorting lists of events
# Two events on the same day? All day events come first
return -1 if $a->{allday} and ! $b->{allday};
return 1 if $b->{allday} and ! $a->{allday};
# If they're both all day events, sort by summary text
return $a->{summary} cmp $b->{summary} if $a->{allday} and $b->{allday};
# Otherwise, sort by start time
return $a->{dt} <=> $b->{dt};
}
# Try and make sure a string ends with sensible punctuation
sub punctuate {
my $str = shift;
return '' if ! defined $str;
$str =~ s/\s*$//g;
$str .= '.' unless $str =~ /[\.\?!]$/;
return $str;
}
format STDOUT =
@<<<<<<<<<<< | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{startstring}, $e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
~ | ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$e->{summary}
|
.
|
