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+package Bugzilla::Extension::MyDashboard::TimeAgo;
+
+use strict;
+use utf8;
+use DateTime;
+use Carp;
+use Exporter qw(import);
+
+use if $ENV{ARCH_64BIT}, 'integer';
+
+our @EXPORT_OK = qw(time_ago);
+
+our $VERSION = '0.06';
+
+my @ranges = (
+ [ -1, 'in the future' ],
+ [ 60, 'just now' ],
+ [ 900, 'a few minutes ago'], # 15*60
+ [ 3000, 'less than an hour ago'], # 50*60
+ [ 4500, 'about an hour ago'], # 75*60
+ [ 7200, 'more than an hour ago'], # 2*60*60
+ [ 21600, 'several hours ago'], # 6*60*60
+ [ 86400, 'today', sub { # 24*60*60
+ my $time = shift;
+ my $now = shift;
+ if ( $time->day < $now->day
+ or $time->month < $now->month
+ or $time->year < $now->year
+ ) {
+ return 'yesterday'
+ }
+ if ($time->hour < 5) {
+ return 'tonight'
+ }
+ if ($time->hour < 10) {
+ return 'this morning'
+ }
+ if ($time->hour < 15) {
+ return 'today'
+ }
+ if ($time->hour < 19) {
+ return 'this afternoon'
+ }
+ return 'this evening'
+ }],
+ [ 172800, 'yesterday'], # 2*24*60*60
+ [ 604800, 'this week'], # 7*24*60*60
+ [ 1209600, 'last week'], # 2*7*24*60*60
+ [ 2678400, 'this month', sub { # 31*24*60*60
+ my $time = shift;
+ my $now = shift;
+ if ($time->year == $now->year and $time->month == $now->month) {
+ return 'this month'
+ }
+ return 'last month'
+ }],
+ [ 5356800, 'last month'], # 2*31*24*60*60
+ [ 24105600, 'several months ago'], # 9*31*24*60*60
+ [ 31536000, 'about a year ago'], # 365*24*60*60
+ [ 34214400, 'last year'], # (365+31)*24*60*60
+ [ 63072000, 'more than a year ago'], # 2*365*24*60*60
+ [ 283824000, 'several years ago'], # 9*365*24*60*60
+ [ 315360000, 'about a decade ago'], # 10*365*24*60*60
+ [ 630720000, 'last decade'], # 20*365*24*60*60
+ [ 2838240000, 'several decades ago'], # 90*365*24*60*60
+ [ 3153600000, 'about a century ago'], # 100*365*24*60*60
+ [ 6307200000, 'last century'], # 200*365*24*60*60
+ [ 6622560000, 'more than a century ago'], # 210*365*24*60*60
+ [ 28382400000, 'several centuries ago'], # 900*365*24*60*60
+ [ 31536000000, 'about a millenium ago'], # 1000*365*24*60*60
+ [ 63072000000, 'more than a millenium ago'], # 2000*365*24*60*60
+);
+
+sub time_ago {
+ my ($time, $now) = @_;
+
+ if (not defined $time or not $time->isa('DateTime')) {
+ croak('DateTime::Duration::Fuzzy::time_ago needs a DateTime object as first parameter')
+ }
+ if (not defined $now) {
+ $now = DateTime->now();
+ }
+ if (not $now->isa('DateTime')) {
+ croak('Invalid second parameter provided to DateTime::Duration::Fuzzy::time_ago; it must be a DateTime object if provided')
+ }
+
+ # Use clones in UTC for safe date calculation
+ my $now_clone = $now->clone->set_time_zone('UTC');
+ my $time_clone = $time->clone->set_time_zone('UTC');
+ my $dur = $now_clone->subtract_datetime_absolute( $time_clone )->in_units('seconds');
+
+ foreach my $range ( @ranges ) {
+ if ( $dur <= $range->[0] ) {
+ if ( $range->[2] ) {
+ return $range->[2]->( $time_clone, $now_clone )
+ }
+ return $range->[1]
+ }
+ }
+
+ return 'millenia ago'
+}
+
+1
+
+__END__
+
+=head1 NAME
+
+DateTime::Duration::Fuzzy -- express dates as fuzzy human-friendly strings
+
+=head1 SYNOPSIS
+
+ use DateTime::Duration::Fuzzy qw(time_ago);
+ use DateTime;
+
+ my $now = DateTime->new(
+ year => 2010, month => 12, day => 12,
+ hour => 19, minute => 59,
+ );
+ my $then = DateTime->new(
+ year => 2010, month => 12, day => 12,
+ hour => 15,
+ );
+ print time_ago($then, $now);
+ # outputs 'several hours ago'
+
+ print time_ago($then);
+ # $now taken from C<time> function
+
+=head1 DESCRIPTION
+
+DateTime::Duration::Fuzzy is inspired from the timeAgo jQuery module
+L<http://timeago.yarp.com/>.
+
+It takes two DateTime objects -- first one representing a moment in the past
+and second optional one representine the present, and returns a human-friendly
+fuzzy expression of the time gone.
+
+=head2 functions
+
+=over 4
+
+=item time_ago($then, $now)
+
+The only exportable function.
+
+First obligatory parameter is a DateTime object.
+
+Second optional parameter is also a DateTime object.
+If it's not provided, then I<now> as the C<time> function returns is
+substituted.
+
+Returns a string expression of the interval between the two DateTime
+objects, like C<several hours ago>, C<yesterday> or <last century>.
+
+=back
+
+=head2 performance
+
+On 64bit machines, it is asvisable to 'use integer', which makes
+the calculations faster. You can turn this on by setting the
+C<ARCH_64BIT> environmental variable to a true value.
+
+If you do this on a 32bit machine, you will get wrong results for
+intervals starting with "several decades ago".
+
+=head1 AUTHOR
+
+Jan Oldrich Kruza, C<< <sixtease at cpan.org> >>
+
+=head1 LICENSE AND COPYRIGHT
+
+Copyright 2010 Jan Oldrich Kruza.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of either: the GNU General Public License as published
+by the Free Software Foundation; or the Artistic License.
+
+See http://dev.perl.org/licenses/ for more information.
+
+=cut