--- /dev/null
+package PVE::CalendarEvent;
+
+use strict;
+use warnings;
+use Data::Dumper;
+use Time::Local;
+
+# Note: This class implements a parser/utils for systemd like calender exents
+# Date specification is currently not implemented
+
+my $dow_names = {
+ sun => 0,
+ mon => 1,
+ tue => 2,
+ wed => 3,
+ thu => 4,
+ fri => 5,
+ sat => 6,
+};
+
+# The parser.
+# returns a $calspec hash which can be passed to compute_next_event()
+sub parse_calendar_event {
+ my ($event) = @_;
+
+ my $parse_single_timespec = sub {
+ my ($p, $max, $matchall_ref, $res_hash) = @_;
+
+ if ($p =~ m/^((?:\*|[0-9]+))(?:\/([1-9][0-9]*))?$/) {
+ my ($start, $repetition) = ($1, $2);
+ if (defined($repetition)) {
+ $repetition = int($repetition);
+ $start = $start eq '*' ? 0 : int($start);
+ die "value '$start' out of range\n" if $start >= $max;
+ die "repetition '$repetition' out of range\n" if $repetition >= $max;
+ while ($start < $max) {
+ $res_hash->{$start} = 1;
+ $start += $repetition;
+ }
+ } else {
+ if ($start eq '*') {
+ $$matchall_ref = 1;
+ } else {
+ $start = int($start);
+ $res_hash->{$start} = 1;
+ }
+ }
+ } elsif ($p =~ m/^([0-9]+)\.\.([1-9][0-9]*)$/) {
+ my ($start, $end) = (int($1), int($2));
+ die "range start '$start' out of range\n" if $start >= $max;
+ die "range end '$end' out of range\n" if $end >= $max || $end < $start;
+ for (my $i = $start; $i <= $end; $i++) {
+ $res_hash->{$i} = 1;
+ }
+ } else {
+ die "unable to parse calendar event '$p'\n";
+ }
+ };
+
+ my $h = undef;
+ my $m = undef;
+
+ my $matchall_minutes = 0;
+ my $matchall_hours = 0;
+ my $minutes_hash = {};
+ my $hours_hash = {};
+
+ my $dowsel = join('|', keys %$dow_names);
+
+ my $dow_hash;
+
+ my $parse_dowspec = sub {
+ my ($p) = @_;
+
+ if ($p =~ m/^($dowsel)$/i) {
+ $dow_hash->{$dow_names->{lc($1)}} = 1;
+ } elsif ($p =~ m/^($dowsel)\.\.($dowsel)$/i) {
+ my $start = $dow_names->{lc($1)};
+ my $end = $dow_names->{lc($2)} || 7;
+ die "wrong order in range '$p'\n" if $end < $start;
+ for (my $i = $start; $i <= $end; $i++) {
+ $dow_hash->{($i % 7)} = 1;
+ }
+ } else {
+ die "unable to parse weekday specification '$p'\n";
+ }
+ };
+
+ my @parts = split(/\s+/, $event);
+
+ if ($parts[0] =~ m/$dowsel/i) {
+ my $dow_spec = shift @parts;
+ foreach my $p (split(',', $dow_spec)) {
+ $parse_dowspec->($p);
+ }
+ } else {
+ $dow_hash = { 0 => 1, 1 => 1, 2 => 1, 3 => 1, 4 => 1, 5=> 1, 6 => 1 };
+ }
+
+ if (scalar(@parts) && $parts[0] =~ m/\-/) {
+ my $date_spec = shift @parts;
+ die "date specification not implemented";
+ }
+
+ my $time_spec = shift(@parts) // "00:00";
+ my $chars = '[0-9*/.,]';
+
+ if ($time_spec =~ m/^($chars+):($chars+)$/) {
+ my ($p1, $p2) = ($1, $2);
+ $parse_single_timespec->($p1, 24, \$matchall_hours, $hours_hash);
+ $parse_single_timespec->($p2, 60, \$matchall_minutes, $minutes_hash);
+ } elsif ($time_spec =~ m/^($chars)+$/) { # minutes only
+ $matchall_hours = 1;
+ foreach my $p (split(',', $time_spec)) {
+ $parse_single_timespec->($p, 60, \$matchall_minutes, $minutes_hash);
+ }
+
+ } else {
+ die "unable to parse calendar event\n";
+ }
+
+ die "unable to parse calendar event - unused parts\n" if scalar(@parts);
+
+ if ($matchall_hours) {
+ $h = '*';
+ } else {
+ $h = [ sort keys %$hours_hash ];
+ }
+
+ if ($matchall_minutes) {
+ $m = '*';
+ } else {
+ $m = [ sort keys %$minutes_hash ];
+ }
+
+ return { h => $h, m => $m, dow => [ sort keys %$dow_hash ]};
+}
+
+sub compute_next_event {
+ my ($calspec, $last, $utc) = @_;
+
+ my $hspec = $calspec->{h};
+ my $mspec = $calspec->{m};
+ my $dowspec = $calspec->{dow};
+
+ $last += 60; # at least one minute later
+
+ while (1) {
+
+ my ($min, $hour, $mday, $mon, $year, $wday);
+ my $startofday;
+
+ if ($utc) {
+ (undef, $min, $hour, $mday, $mon, $year, $wday) = gmtime($last);
+ $startofday = timegm(0, 0, 0, $mday, $mon, $year);
+ } else {
+ (undef, $min, $hour, $mday, $mon, $year, $wday) = localtime($last);
+ $startofday = timelocal(0, 0, 0, $mday, $mon, $year);
+ }
+
+ $last = $startofday + $hour*3600 + $min*60;
+
+ my $check_dow = sub {
+ foreach my $d (@$dowspec) {
+ return $last if $d == $wday;
+ if ($d > $wday) {
+ return $startofday + ($d-$wday)*86400;
+ }
+ }
+ return $startofday + (7-$wday)*86400; # start of next week
+ };
+
+ if ((my $next = $check_dow->()) != $last) {
+ $last = $next;
+ next; # repeat
+ }
+
+ my $check_hour = sub {
+ return $last if $hspec eq '*';
+ foreach my $h (@$hspec) {
+ return $last if $h == $hour;
+ if ($h > $hour) {
+ return $startofday + $h*3600;
+ }
+ }
+ return $startofday + 24*3600; # test next day
+ };
+
+ if ((my $next = $check_hour->()) != $last) {
+ $last = $next;
+ next; # repeat
+ }
+
+ my $check_minute = sub {
+ return $last if $mspec eq '*';
+ foreach my $m (@$mspec) {
+ return $last if $m == $min;
+ if ($m > $min) {
+ return $startofday +$hour*3600 + $m*60;
+ }
+ }
+ return $startofday + ($hour + 1)*3600; # test next hour
+ };
+
+ if ((my $next = $check_minute->()) != $last) {
+ $last = $next;
+ next; # repeat
+ } else {
+ return $last;
+ }
+ }
+
+ die "unable to compute next calendar event\n";
+}
+
+1;
projects / pve-common.git / blobdiff