DateTime: (add|subtract)_businessdays Funktionen

diff --git a/SL/Helper/DateTime.pm b/SL/Helper/DateTime.pm
index 94c311f..c79dad1 100644 (file)
--- a/SL/Helper/DateTime.pm
+++ b/SL/Helper/DateTime.pm
@@ -36,6 +36,42 @@ sub from_lxoffice {
   goto &from_kivitendo;
 }
 
+sub add_business_duration {
+  my ($self, %params) = @_;
+
+  my $abs_days = abs $params{days};
+  my $neg      = $params{days} < 0;
+  my $bweek    = $params{businessweek} || 5;
+  my $weeks    = int ($abs_days / $bweek);
+  my $days     = $abs_days % $bweek;
+
+  if ($neg) {
+    $self->subtract(weeks => $weeks);
+    $self->add(days => 8 - $self->day_of_week) if $self->day_of_week > $bweek;
+    $self->subtract(days => $self->day_of_week > $days ? $days : $days + (7 - $bweek));
+  } else {
+    $self->add(weeks => $weeks);
+    $self->subtract(days => $self->day_of_week - $bweek) if $self->day_of_week > $bweek;
+    $self->add(days => $self->day_of_week + $days <= $bweek ? $days : $days + (7 - $bweek));
+  }
+
+  $self;
+}
+
+sub add_businessdays {
+  my ($self, %params) = @_;
+
+  $self->add_business_duration(%params);
+}
+
+sub subtract_businessdays {
+  my ($self, %params) = @_;
+
+  $params{days} *= -1;
+
+  $self->add_business_duration(%params);
+}
+
 1;
 
 __END__

diff --git a/t/helper/datetime.t b/t/helper/datetime.t
new file mode 100644 (file)
index 0000000..afaa49e
--- /dev/null
+++ b/t/helper/datetime.t
@@ -0,0 +1,89 @@
+use Test::More tests => 50;
+
+use lib 't';
+
+use Data::Dumper;
+
+use DateTime;
+use_ok 'SL::Helper::DateTime';
+
+sub mon { DateTime->new(year => 2014, month => 6, day => 23) }
+sub tue { DateTime->new(year => 2014, month => 6, day => 24) }
+sub wed { DateTime->new(year => 2014, month => 6, day => 25) }
+sub thu { DateTime->new(year => 2014, month => 6, day => 26) }
+sub fri { DateTime->new(year => 2014, month => 6, day => 27) }
+sub sat { DateTime->new(year => 2014, month => 6, day => 28) }
+sub sun { DateTime->new(year => 2014, month => 6, day => 29) }
+
+
+is mon->add_businessdays(days => 5)->day_of_week, 1, "mon + 5 => mon";
+is mon->add_businessdays(days => 12)->day_of_week, 3, "mon + 12 => wed";
+is fri->add_businessdays(days => 2)->day_of_week, 2, "fri + 2 => tue";
+is tue->add_businessdays(days => 9)->day_of_week, 1, "tue + 9 => mon";
+is tue->add_businessdays(days => 8)->day_of_week, 5, "tue + 8 => fri";
+
+# same with 6day week
+is mon->add_businessdays(businessweek => 6, days => 5)->day_of_week, 6, "mon + 5 => sat (6dw)";
+is mon->add_businessdays(businessweek => 6, days => 12)->day_of_week, 1, "mon + 12 => mon (6dw)";
+is fri->add_businessdays(businessweek => 6, days => 2)->day_of_week, 1, "fri + 2 => mon (6dw)";
+is tue->add_businessdays(businessweek => 6, days => 9)->day_of_week, 5, "tue + 9 => fri (6dw)";
+is tue->add_businessdays(businessweek => 6, days => 8)->day_of_week, 4, "tue + 8 => thu (6dw)";
+
+# absolute dates
+
+is mon->add_businessdays(days => 5), mon->add(days => 7), "mon + 5 => mon (date)";
+is mon->add_businessdays(days => 12), mon->add(days => 16), "mon + 12 => wed (date)";
+is fri->add_businessdays(days => 2), fri->add(days => 4), "fri + 2 => tue (date)";
+is tue->add_businessdays(days => 9), tue->add(days => 13), "tue + 9 => mon (date)";
+is tue->add_businessdays(days => 8), tue->add(days => 10), "tue + 8 => fri (date)";
+
+# same with 6day week
+is mon->add_businessdays(businessweek => 6, days => 5), mon->add(days => 5), "mon + 5 => sat (date) (6dw)";
+is mon->add_businessdays(businessweek => 6, days => 12), mon->add(days => 14), "mon + 12 => mon (date) (6dw)";
+is fri->add_businessdays(businessweek => 6, days => 2), fri->add(days => 3), "fri + 2 => mon (date) (6dw)";
+is tue->add_businessdays(businessweek => 6, days => 9), tue->add(days => 10), "tue + 9 => fri (date) (6dw)";
+is tue->add_businessdays(businessweek => 6, days => 8), tue->add(days => 9), "tue + 8 => thu (date) (6dw)";
+
+
+# same with substract
+
+is mon->subtract_businessdays(days => 5)->day_of_week, 1, "mon - 5 => mon";
+is mon->subtract_businessdays(days => 12)->day_of_week, 4, "mon - 12 => thu";
+is fri->subtract_businessdays(days => 2)->day_of_week, 3, "fri - 2 => wed";
+is tue->subtract_businessdays(days => 9)->day_of_week, 3, "tue - 9 => wed";
+is tue->subtract_businessdays(days => 8)->day_of_week, 4, "tue - 8 => thu";
+
+# same with 6day week
+is mon->subtract_businessdays(businessweek => 6, days => 5)->day_of_week, 2, "mon - 5 => tue (6dw)";
+is mon->subtract_businessdays(businessweek => 6, days => 12)->day_of_week, 1, "mon - 12 => mon (6dw)";
+is fri->subtract_businessdays(businessweek => 6, days => 4)->day_of_week, 1, "fri - 4 => mon (6dw)";
+is tue->subtract_businessdays(businessweek => 6, days => 9)->day_of_week, 5, "tue - 9 => fri (6dw)";
+is tue->subtract_businessdays(businessweek => 6, days => 8)->day_of_week, 6, "tue - 8 => sat (6dw)";
+
+# absolute dates
+
+is mon->subtract_businessdays(days => 5), mon->add(days => -7), "mon - 5 => mon (date)";
+is mon->subtract_businessdays(days => 12), mon->add(days => -18), "mon - 12 => thu (date)";
+is fri->subtract_businessdays(days => 2), fri->add(days => -2), "fri - 2 => wed (date)";
+is tue->subtract_businessdays(days => 9), tue->add(days => -13), "tue - 9 => wed (date)";
+is tue->subtract_businessdays(days => 8), tue->add(days => -12), "tue - 8 => thu (date)";
+
+# same with 6day week
+is mon->subtract_businessdays(businessweek => 6, days => 5), mon->add(days => -6), "mon - 5 => tue (date) (6dw)";
+is mon->subtract_businessdays(businessweek => 6, days => 12), mon->add(days => -14), "mon - 12 => mon (date) (6dw)";
+is fri->subtract_businessdays(businessweek => 6, days => 4), fri->add(days => -4), "fri - 4 => mon (date) (6dw)";
+is tue->subtract_businessdays(businessweek => 6, days => 9), tue->add(days => -11), "tue - 9 => fri (date) (6dw)";
+is tue->subtract_businessdays(businessweek => 6, days => 8), tue->add(days => -10), "tue - 8 => sat (date) (6dw)";
+
+# add with negative days?
+is mon->add_businessdays(businessweek => 6, days => -5), mon->add(days => -6), "mon - 5 => tue (date) (6dw)";
+is mon->add_businessdays(businessweek => 6, days => -12), mon->add(days => -14), "mon - 12 => mon (date) (6dw)";
+is fri->add_businessdays(businessweek => 6, days => -4), fri->add(days => -4), "fri - 4 => mon (date) (6dw)";
+is tue->add_businessdays(businessweek => 6, days => -9), tue->add(days => -11), "tue - 9 => fri (date) (6dw)";
+is tue->add_businessdays(businessweek => 6, days => -8), tue->add(days => -10), "tue - 8 => sat (date) (6dw)";
+
+# what if staring date falls into eekend?
+is sun->add_businessdays(days => 1), sun->add(days => 1), "1 day after sun is mon";
+is sat->add_businessdays(days => 1), sat->add(days => 2), "1 day after sut is mon";
+is sun->add_businessdays(days => -1), sun->add(days => -2), "1 day before sun is fri";
+is sat->add_businessdays(days => -1), sat->add(days => -1), "1 day before sut is fri";