578 lines
21 KiB
Perl
Executable file
578 lines
21 KiB
Perl
Executable file
#!/usr/bin/perl -w
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# calendar-export.plx -*- Perl -*-
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# NOTE: Overall license of this file is GPLv3-only, due (in part) to Software
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# Freedom Law Center copyrights (see below). Kuhn's personal copyrights are
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# licensed GPLv3-or-later.
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# ====================================================================
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# The sub's "safe_read_from_pipe" and read_from_process are:
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# Copyright (c) 2000-2004 CollabNet. All rights reserved.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at http://subversion.tigris.org/license-1.html.
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# If newer versions of this license are posted there, you may use a
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# newer version instead, at your option.
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#
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# This software consists of voluntary contributions made by many
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# individuals. For exact contribution history, see the revision
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# history and logs, available at http://subversion.tigris.org/.
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# Note: bkuhn downloaded the license from
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# http://subversion.tigris.org/license-1.html on 2013-12-29 which said:
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# The license of Subversion 1.7 and later is at
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# http://svn.apache.org/repos/asf/subversion/trunk/LICENSE.
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# The license of Subversion 1.6 and earlier can be found at
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# http://svn.apache.org/repos/asf/subversion/tags/1.6.0/www/license-1.html.
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# Both license texts are now included, in APACHE-LICENSE and OLD-SVN-LICENSE,
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# respectively.
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# ====================================================================
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#
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# Copyright © 2013 Bradley M. Kuhn <bkuhn@ebb.org>
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#
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# This software's license gives you freedom; you can copy, convey,
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# propogate, redistribute and/or modify this program under the terms of
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# the GNU General Public License (GPL) as published by the Free
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# Software Foundation (FSF), either version 3 of the License, or (at your
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# option) any later version of the GPL published by the FSF.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program in a file in the toplevel directory called
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# "GPLv3". If not, see <http://www.gnu.org/licenses/>.
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# ====================================================================
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# The functions DoLog, BinarySearchForTZEntry, PrivatizeMergeAndTZIcalFile,
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# BuildTZList, MergeLists, PrivacyFilterICalFiles, and FilterEmacsToICal material
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# copyrighted and licensed as below:
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# Copyright © 2006 Software Freedom Law Center, Inc.
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#
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# This software gives you freedom; it is licensed to you under version 3
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# of the GNU General Public License.
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#
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# This software is distributed WITHOUT ANY WARRANTY, without even the
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# implied warranties of MERCHANTABILITY and FITNESS FOR A PARTICULAR
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# PURPOSE. See the GNU General Public License for further details.
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#
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# You should have received a copy of the GNU General Public License,
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# version 3. If not, see <http://www.gnu.org/licenses/>
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use strict;
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use warnings;
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use POSIX ":sys_wait_h";
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use Fcntl; # for sysopen
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use Carp;
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use Data::ICal;
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use File::Temp qw/:POSIX tempfile/;
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use DateTime::TimeZone;
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use Date::Manip;
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use DateTime::Format::ICal;
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my($CONFIG_FILE) = (@ARGV);
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if (@ARGV != 1) {
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print STDERR "usage: $0 <CONFIG_FILE>\n";
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exit 1;
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}
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###############################################################################
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my $CALENDAR_LOCK_FILE = "$ENV{HOME}/.emacs-calendar-to-ics-lock";
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my $LOCK_CLEANUP_CODE = sub {
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return (unlink($CALENDAR_LOCK_FILE) != 1) ?
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"Failed unlink of $CALENDAR_LOCK_FILE. Could cause trouble." :
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"";
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};
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###############################################################################
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{
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my %messageHistory;
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sub DoLog ($$$;$) {
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my($type, $user, $message, $cleanupCode) = @_;
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use Date::Manip;
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my $NOW = ParseDate("now");
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my $lastTime = $messageHistory{$message};
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my $sendIt = 0;
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if (not defined $lastTime) {
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$sendIt = 1;
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} else {
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my $err;
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my $sinceLast = DateCalc($lastTime,"+ 10 minutes",\$err);
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$sendIt = 1 if ($NOW gt $sinceLast);
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}
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if ($sendIt) {
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my $fh = File::Temp->new();
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$fh->unlink_on_destroy( 1 );
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my $fname = $fh->filename;
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print $fh "Calendar Export Failure: $message\n";
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$fh->close();
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system('/home/bkuhn/bin/myosd', $fname);
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unless (-f "$ENV{HOME}/.silent-running") {
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open(ESPEAK, "-|", "/usr/bin/espeak", '-p', '45', '-s', '130', '-f', $fname, "--stdout");
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open(PAPLAY, "|-", "/usr/bin/paplay");
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my $data;
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while (read(ESPEAK, $data, 8) == 8) {
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print PAPLAY $data;
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}
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close PAPLAY; close ESPEAK;
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}
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system('/usr/bin/notify-send', '-u', 'critical', '-t', '300000',
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'Failure', "Calendar export failure: $message");
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$messageHistory{$message} = $NOW;
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}
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my $more;
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$more = &$cleanupCode if defined $cleanupCode and ref $cleanupCode;
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$message .= " $more" if (defined $more and $more !~ /^\s*$/);
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croak $message if $type eq "die";
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warn $message;
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}
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sub DieLog ($;$) {
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DoLog("die", undef, $_[0], $_[1]);
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}
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sub WarnLog ($$) {
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DoLog("warn", $_[0], $_[1]);
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}
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}
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###############################################################################
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# Start a child process safely without using /bin/sh.
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sub safe_read_from_pipe
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{
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unless (@_)
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{
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DieLog("$0: safe_read_from_pipe passed no arguments.");
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}
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my $pid = open(SAFE_READ, '-|');
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unless (defined $pid)
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{
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DieLog("$0: cannot fork: $!");
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}
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unless ($pid)
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{
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open(STDERR, ">&STDOUT")
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or DieLog("$0: cannot dup STDOUT: $!");
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exec(@_)
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or DieLog("$0: cannot exec `@_': $!\n");
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}
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my @output;
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while (<SAFE_READ>)
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{
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s/[\r\n]+$//;
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push(@output, $_);
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}
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close(SAFE_READ);
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my $result = $?;
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my $exit = $result >> 8;
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my $signal = $result & 127;
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my $cd = $result & 128 ? "with core dump" : "";
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if ($signal or $cd)
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{
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DieLog("$0: pipe from `@_' failed $cd: exit=$exit signal=$signal\n");
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}
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if (wantarray)
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{
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return ($result, @output);
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}
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else
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{
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return $result;
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}
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}
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###############################################################################
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# Use safe_read_from_pipe to start a child process safely and return
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# the output if it succeeded or an error message followed by the output
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# if it failed.
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sub read_from_process
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{
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unless (@_)
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{
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DieLog("$0: read_from_process passed no arguments.");
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}
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my ($status, @output) = &safe_read_from_pipe(@_);
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if ($status)
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{
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return ("$0: `@_' failed with this output:", @output);
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}
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else
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{
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return @output;
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}
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}
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###############################################################################
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sub BinarySearchForTZEntry {
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# $tzList is assumed to be sorted, $dateTime is
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my($tzList, $dateTime) = @_;
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my ($l, $u) = (0, @$tzList - 1); # lower, upper end of search interval
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my $i; # index of probe
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my $final = 0;
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while ($l <= $u) {
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$i = int(($l + $u)/2);
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my $compareVal = DateTime->compare($tzList->[$i]{date}, $dateTime);
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if ($compareVal < 0) {
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$l = $i+1;
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$final = $i;
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} elsif ($compareVal > 0) {
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$u = $i-1;
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} else {
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return $tzList->[$i]; # found, won't happen often
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}
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}
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return $tzList->[$final]; # not found, go down one lower
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}
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###############################################################################
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# Take a list of keys and a list of values and insersperse them and
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# return the result
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sub MergeLists {
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my ($keys, $values) = @_;
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DieLog("Length mismatch", $LOCK_CLEANUP_CODE) unless @$keys == @$values;
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# Add the argument names to the values
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my @result;
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for (my $i = 0; $i < @$keys; $i++) {
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push @result, $keys->[$i] => $values->[$i];
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}
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return @result;
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}
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###############################################################################
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sub BuildTZList ($$$) {
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my($user, $pubEmacsFile, $privEmacsFile) = @_;
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my @tzList;
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foreach my $file ($pubEmacsFile, $privEmacsFile) {
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open(DATA, "<$file") or DieLog("unable to read $file: $!",
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$LOCK_CLEANUP_CODE);
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while (my $line = <DATA>) {
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if ($line =~ /^\s*;[;\s]*TZ\s*=([^\s,]+)\s*(?:,+\s*LOCA?T?I?O?N?\s*=\"([^"]+)\")?
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\s+(?:at|on)\s*(.*)\s+in\s+(\S+)\s*$/ix) {
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my($newTZstr, $location, $dateStartStr, $dateStartTZstr) = ($1, $2, $3, $4);
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my $newTZ;
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eval { $newTZ = DateTime::TimeZone->new( name => $newTZstr ); };
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if ($@ or not defined $newTZ) {
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WarnLog($user,
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"Invalid time zone of \"$newTZstr\" in $line from $file: $@");
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next;
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}
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my $dateStartTZ;
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eval {
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$dateStartTZ = DateTime::TimeZone->new( name => $dateStartTZstr ); };
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if ($@ or not defined $dateStartTZ) {
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WarnLog($user,
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"Invalid time zone of \"$dateStartTZstr\" in $line from $file: $@");
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next;
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}
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my(@data) = UnixDate("$dateStartStr", qw(%Y %m %d %H %M %S));
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if (@data != 6) {
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WarnLog($user, "Unparseable date string of \"$dateStartStr\"" .
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"in $line from $file");
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next;
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}
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my @args = MergeLists([qw( year month day hour minute second)], \@data);
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my $startDate;
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eval {
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$startDate = DateTime->new(@args, time_zone => $dateStartTZstr);
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};
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if ($@ or not defined $startDate) {
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WarnLog($user, "Trouble parsing \"$dateStartStr $dateStartTZstr\" " .
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"in $line from $file\n\n" .
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"Most likely $dateStartTZstr was a bad time zone.: $@ ");
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next;
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}
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push(@tzList, { date => $startDate, newTZ => $newTZ, location => $location});
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}
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}
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}
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# If we found nothing, everything is NYC
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if (@tzList == 0) {
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push(@tzList, { date => DateTime->new(year => 2006, month => 11, day => 03,
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hour => 11, minute => 00, second => 00,
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time_zone => "America/New_York"),
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newTZ => "America/New_York", location => undef });
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}
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return sort { DateTime->compare($a->{date}, $b->{date}); } @tzList;
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}
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###############################################################################
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sub FilterEmacsToICal ($$$$$) {
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my ($publicCalendarFile, $privateCalendarFile, $outputDir,
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$emacsSettings, $user) = @_;
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my @tzList = BuildTZList($emacsSettings->{reportProblems},
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$publicCalendarFile, $privateCalendarFile);
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my($elispFH, $elispFile) = tempfile();
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my $icsWillBePrivatizedFile = tmpnam();
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my $icsPublicFile = tmpnam();
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print $elispFH "(setq-default european-calendar-style t)\n"
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if $emacsSettings->{calendarStyle} =~ /european/i;
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print $elispFH <<ELISP_END
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(setq icalendar-uid-format "emacs-%u-%h-%s")
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ELISP_END
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;
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print $elispFH "(icalendar-export-file \"$privateCalendarFile\" \"$icsWillBePrivatizedFile\")\n"
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if defined $privateCalendarFile;
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print $elispFH "(icalendar-export-file \"$publicCalendarFile\" \"$icsPublicFile\")\n"
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if defined $publicCalendarFile;
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$elispFH->close();
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my @emacsOutput = read_from_process($emacsSettings->{emacsBinary}, '--no-windows',
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'--batch', '--no-site-file', '-l', $elispFile);
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DieLog("Emacs process for exporting $privateCalendarFile and " .
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"$publicCalendarFile exited with non-zero exit status of " .
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"$? ($!), and output of:\n " . join("\n ", @emacsOutput),
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$LOCK_CLEANUP_CODE)
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if ($? != 0);
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my $goodCount =0;
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foreach my $line (@emacsOutput) {
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$goodCount++
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if $line =~ /^\s*Wrote\s+($icsPublicFile|$icsWillBePrivatizedFile)\s*$/;
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}
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DieLog("Unexpected Emacs output: " . join("\n ", @emacsOutput),
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$LOCK_CLEANUP_CODE)
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if ($goodCount > 2);
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PrivatizeMergeAndTZIcalFile($icsWillBePrivatizedFile, $icsPublicFile,
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$outputDir, \@tzList, $user);
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PrivacyFilterICalFile($outputDir) if $emacsSettings->{privacyScrub};
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DieLog("Unable to remove temporary files")
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unless unlink($icsPublicFile, $icsWillBePrivatizedFile) == 2;
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}
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###############################################################################
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sub PrivacyFilterICalFiles ($$) {
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my($icsDirectory) = @_;
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chdir $icsDirectory or die "unable to change to $icsDirectory: $!";
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foreach my $file (<*.ics>) {
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my $newCalendar = Data::ICal->new(data => <<END_ICAL
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BEGIN:VCALENDAR
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VERSION:2.0
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PRODID:-//Emacs//NONSGML icalendar.el//EN
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END:VCALENDAR
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END_ICAL
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);
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my $oldCalendar = Data::ICal->new(filename => $file);
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my $entries = (defined $oldCalendar) ? $oldCalendar->entries : [];
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my $x =0;
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foreach my $entry (@{$entries}) {
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my @newSubEntries;
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foreach my $subEntry (@{$entry->{entries}}) {
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my $refVal = ref $subEntry;
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if (defined $refVal and $refVal =~ /Alarm/i) {
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# Don't put it in the list in the public version if is an alarm
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} else {
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push(@newSubEntries, $subEntry);
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}
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}
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$entry->{entries} = \@newSubEntries;
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my $classes = $entry->property('class');
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my $class;
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foreach my $classProp (@{$classes}) {
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$class = $classProp->value;
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last if defined $class and
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$class =~ /^\s*(?:PUBLIC|PRIVATE|CONFIDENTIAL)\s*/i;
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}
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if (defined $class and $class =~ /CONFIDENTIAL/i) {
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foreach my $prop (qw/location summary description/) {
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my $propList = $entry->property($prop);
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$entry->add_property($prop => "Private")
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if (defined $propList and @{$propList} > 0);
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}
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} elsif (defined $class and $class =~ /PRIVATE/i){
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# do not put this event in the output at all
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die "unable to scrub $file in $icsDirectory: $!"
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unless unlink($file) == 1;
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}
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$newCalendar->add_entry($entry);
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}
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open(SCRUBBED_CAL, ">$file") or
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DieLog("Unable to overwrite $file: $!", $LOCK_CLEANUP_CODE);
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print SCRUBBED_CAL $newCalendar->as_string;
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close SCRUBBED_CAL;
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DieLog("Error when writing $file: $!", $LOCK_CLEANUP_CODE)
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unless $? == 0;
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undef $newCalendar;
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}
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}
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######################################################################
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sub PrivatizeMergeAndTZIcalFile ($$$$$$) {
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my($icsPrivate, $icsPublic, $icsOutputDir, $tzList, $user, $errorUser) = @_;
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my %calendar;
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$calendar{private} = Data::ICal->new(filename => $icsPrivate);
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$calendar{public} = Data::ICal->new(filename => $icsPublic);
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my $type = "public";
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foreach my $type (qw/public private/) {
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my $entries = (defined $calendar{$type}) ? $calendar{$type}->entries : [];
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foreach my $entry (@{$entries}) {
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my $newCalendar = Data::ICal->new(data => <<END_ICAL
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BEGIN:VCALENDAR
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VERSION:2.0
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PRODID:-//Emacs//NONSGML icalendar.el//EN
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END:VCALENDAR
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END_ICAL
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);
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$entry->add_property(class => "CONFIDENTIAL") if ($type eq "private");
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# Let's shift some timezones around.
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foreach my $dateType (qw/DTSTART DTEND/) {
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my $datePropList = $entry->property($dateType);
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next unless @$datePropList > 0;
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WarnLog($errorUser, "Strange that the entry below for $icsOutputDir had more " .
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"than one $dateType:\n" . Data::Dumper->Dumper($entry) )
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unless @$datePropList == 1;
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my $dateProp = $datePropList->[0];
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# Only continue processing date if we have this property. (Duh)
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next unless defined $dateProp;
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my $params = $dateProp->parameters();
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# Only continue if it is a DATE-TIME property. This is a bit of a
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# judgement call but I think it's the right one. When someone
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# creates an all-day event, we don't want to allow it to drift to
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# antoher day merely because the user has moved time zones.
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next unless defined $params and defined $params->{VALUE}
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and $params->{VALUE} =~ /DATE\-TIME/i;
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my $nyTime = DateTime::Format::ICal->parse_datetime($dateProp->value);
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my $newDate = DateTime::Format::ICal->parse_datetime($dateProp->value);
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$nyTime->set_time_zone("America/New_York")
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if $nyTime->time_zone->name =~ /floating/;
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my $val = BinarySearchForTZEntry($tzList, $nyTime);
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$newDate->set_time_zone($val->{newTZ});
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$newDate->set_time_zone("America/New_York");
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$newDate->set_time_zone("floating");
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my $newICalDate = DateTime::Format::ICal->format_datetime($newDate);
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$dateProp->value($newICalDate);
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}
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$newCalendar->add_entry($entry);
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# Now, write out each event into a single ics file in $icsOutputDir.
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# This will overwrite existing events of the same name.
|
|
|
|
my $uidList = $entry->property('UID');
|
|
DieLog("This entry has multiple UIDs: @{$uidList}") unless @$uidList == 1;
|
|
my $uid = $uidList->[0]->value;
|
|
|
|
my $outputFile = File::Spec->catpath("", $icsOutputDir, "${uid}.ics");
|
|
open(SINGLE_EVENT_ICAL, ">", $outputFile) or
|
|
DieLog("Unable to overwrite $outputFile: $!", $LOCK_CLEANUP_CODE);
|
|
print SINGLE_EVENT_ICAL $newCalendar->as_string;
|
|
close SINGLE_EVENT_ICAL;
|
|
DieLog("Error ($?) while writing $outputFile ($?): $!", $LOCK_CLEANUP_CODE) unless $? == 0;
|
|
undef $newCalendar;
|
|
}
|
|
}
|
|
|
|
# Create specialized "Time Zone change" events to indicate the user's travel.
|
|
foreach my $tzEntry (@$tzList) { $tzEntry->{date}->set_time_zone("floating"); }
|
|
for (my $ii = 0; $ii < @$tzList; $ii++) {
|
|
my $tzEntry = $tzList->[$ii];
|
|
|
|
next unless defined $tzEntry->{location} and
|
|
$tzEntry->{location} !~ /^\s*NYC\s*$/i;
|
|
|
|
my $startDate = DateTime::Format::ICal->format_datetime($tzEntry->{date});
|
|
|
|
|
|
my $nextDate = ($ii+1 < @$tzList) ?
|
|
DateTime::Format::ICal->format_datetime($tzList->[$ii+1]{date}) : $startDate;
|
|
|
|
$nextDate =~ s/T\d+Z?$//; $startDate =~ s/T\d+Z?$//;
|
|
|
|
my $whereEvent = Data::ICal::Entry::Event->new();
|
|
my $desc = "$user Travel: ". $tzEntry->{location};
|
|
my $uid = "bkuhnScript" . '-' . sha1($desc . $startDate);
|
|
$whereEvent->add_properties(summary => "$user Travel: ". $tzEntry->{location},
|
|
description => $tzEntry->{location},
|
|
dtstart => [ $startDate, { VALUE => 'DATE' } ],
|
|
dtend => [ $nextDate,{ VALUE => 'DATE' } ],
|
|
uid => $uid);
|
|
my $newCalendar = Data::ICal->new(data => <<END_ICAL
|
|
BEGIN:VCALENDAR
|
|
VERSION:2.0
|
|
PRODID:-//Emacs//NONSGML icalendar.el//EN
|
|
END:VCALENDAR
|
|
END_ICAL
|
|
);
|
|
$newCalendar->add_entry($whereEvent);
|
|
|
|
my $outputFile = File::Spec->catpath("", $icsOutputDir, "${uid}.ics");
|
|
open(SINGLE_EVENT_ICAL, ">", $outputFile) or
|
|
DieLog("Unable to overwrite $outputFile: $!", $LOCK_CLEANUP_CODE);
|
|
print SINGLE_EVENT_ICAL $newCalendar->as_string;
|
|
close SINGLE_EVENT_ICAL;
|
|
DieLog("Error ($?) while writing $outputFile ($?): $!", $LOCK_CLEANUP_CODE) unless $? == 0;
|
|
undef $newCalendar;
|
|
}
|
|
return \%calendar;
|
|
}
|
|
######################################################################
|
|
sub ReadConfig($) {
|
|
my($configFile) = @_;
|
|
open (CONFIG_FILE, "<", $configFile) or DieLog("unable to read $configFile ($?): $!");
|
|
|
|
my %config;
|
|
|
|
while (my $line = <CONFIG_FILE>) {
|
|
chomp $line;
|
|
DieLog("Unable to parse $line in config file, $configFile")
|
|
unless $line =~ /^\s*([^:]+)\s*:\s*([^:]+)\s*$/;
|
|
$config{$1} = $2;
|
|
}
|
|
close CONFIG_FILE; DieLog("Error reading $configFile ($?): $!") if $? != 0;
|
|
return \%config;
|
|
}
|
|
######################################################################
|
|
|
|
system("/usr/bin/lockfile -r 8 $CALENDAR_LOCK_FILE");
|
|
DieLog("Failure to acquire calendar lock on $CALENDAR_LOCK_FILE") unless ($? == 0);
|
|
|
|
my $config = ReadConfig($CONFIG_FILE);
|
|
|
|
$config->{scrubPrivate} = 0 if not defined $config->{scrubPrivate};
|
|
$config->{reportProblems} = $config->{user} if not defined $config->{reportProblems};
|
|
$config->{emacsBinary} = "/usr/bin/emacs" if not defined $config->{emacsBinary};
|
|
$config->{calendarStyle} = 'plain' if not defined $config->{calendarStyle};
|
|
DieLog("$config->{emacsBinary} doesn't appear to be executable for $config->{emacsBinary}")
|
|
unless defined $config->{emacsBinary} and -x $config->{emacsBinary};
|
|
|
|
if (defined $config->{cleanOutputDirFirst} and $config->{cleanOutputDirFirst}) {
|
|
chdir $config->{outputDir} or die "unable to change directory to $config->{outputDir} $? $!";
|
|
system("/bin/rm -f *.ics");
|
|
}
|
|
|
|
DieLog("$CONFIG_FILE doesn't specify a (readable) output directory via outputDir setting: $!")
|
|
unless defined $config->{outputDir} and -d $config->{outputDir};
|
|
|
|
|
|
DieLog("$CONFIG_FILE doesn't specify a readable public nor a private diary file")
|
|
unless (defined $config->{publicDiary} and -r $config->{publicDiary}) or
|
|
(defined $config->{privateyDiary} and -r $config->{privateDiary});
|
|
|
|
FilterEmacsToICal($config->{publicDiary}, $config->{privateDiary},
|
|
$config->{outputDir}, $config, $config->{user});
|
|
|
|
&$LOCK_CLEANUP_CODE();
|
|
|
|
__END__
|
|
# Local variables:
|
|
# compile-command: "perl -c calendar-export.plx"
|
|
# End:
|