projekt 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);

}