1 files changed, 84 insertions, 0 deletions
diff --git a/extensions/BMO/lib/Util.pm b/extensions/BMO/lib/Util.pm
new file mode 100644
index 000000000..ccb25758b
--- /dev/null
+++ b/extensions/BMO/lib/Util.pm
@@ -0,0 +1,84 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+
+package Bugzilla::Extension::BMO::Util;
+use strict;
+use warnings;
+
+use Bugzilla::Error;
+use Bugzilla::Extension::BMO::Data qw($cf_disabled_flags);
+use Date::Parse;
+use DateTime;
+
+use base qw(Exporter);
+
+our @EXPORT = qw( string_to_datetime
+                  time_to_datetime
+                  parse_date
+                  is_active_status_field );
+
+sub string_to_datetime {
+    my $input = shift;
+    my $time = parse_date($input)
+        or ThrowUserError('report_invalid_date', { date => $input });
+    return time_to_datetime($time);
+}
+
+sub time_to_datetime {
+    my $time = shift;
+    return DateTime->from_epoch(epoch => $time)
+                   ->set_time_zone('local')
+                   ->truncate(to => 'day');
+}
+
+sub parse_date {
+    my ($str) = @_;
+    if ($str =~ /^(-|\+)?(\d+)([hHdDwWmMyY])$/) {
+        # relative date
+        my ($sign, $amount, $unit, $date) = ($1, $2, lc $3, time);
+        my ($sec, $min, $hour, $mday, $month, $year, $wday)  = localtime($date);
+        $amount = -$amount if $sign && $sign eq '+';
+        if ($unit eq 'w') {
+            # convert weeks to days
+            $amount = 7 * $amount + $wday;
+            $unit = 'd';
+        }
+        if ($unit eq 'd') {
+            $date -= $sec + 60 * $min + 3600 * $hour + 24 * 3600 * $amount;
+            return $date;
+        }
+        elsif ($unit eq 'y') {
+            return str2time(sprintf("%4d-01-01 00:00:00", $year + 1900 - $amount));
+        }
+        elsif ($unit eq 'm') {
+            $month -= $amount;
+            while ($month < 0) { $year--; $month += 12; }
+            return str2time(sprintf("%4d-%02d-01 00:00:00", $year + 1900, $month + 1));
+        }
+        elsif ($unit eq 'h') {
+            # Special case 0h for 'beginning of this hour'
+            if ($amount == 0) {
+                $date -= $sec + 60 * $min;
+            } else {
+                $date -= 3600 * $amount;
+            }
+            return $date;
+        }
+        return undef;
+    }
+    return str2time($str);
+}
+
+sub is_active_status_field {
+    my ($field_name) = @_;
+    if ($field_name =~ /^cf_status/) {
+        return !grep { $field_name eq $_ } @$cf_disabled_flags
+    }
+    return 0;
+}
+
+1;