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package SL::DB::Helper::AttrDuration;
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use strict;
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use parent qw(Exporter);
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our @EXPORT = qw(attr_duration);
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use Carp;
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sub attr_duration {
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my ($package, @attributes) = @_;
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_make($package, $_) for @attributes;
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}
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sub _make {
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my ($package, $attribute) = @_;
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no strict 'refs';
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*{ $package . '::' . $attribute . '_as_hours' } = sub {
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my ($self, $value) = @_;
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$self->$attribute(int($value) + ($self->$attribute - int($self->$attribute))) if @_ > 1;
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return int($self->$attribute // 0);
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};
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*{ $package . '::' . $attribute . '_as_minutes' } = sub {
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my ($self, $value) = @_;
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$self->$attribute(int($self->$attribute) * 1.0 + ($value // 0) / 60.0) if @_ > 1;
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return int(($self->$attribute // 0) * 60.0 + 0.5) % 60;
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};
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*{ $package . '::' . $attribute . '_as_duration_string' } = sub {
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my ($self, $value) = @_;
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$self->$attribute(defined($value) ? $::form->parse_amount(\%::myconfig, $value) * 1 : undef) if @_ > 1;
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return defined($self->$attribute) ? $::form->format_amount(\%::myconfig, $self->$attribute // 0, 2) : undef;
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};
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*{ $package . '::' . $attribute . '_as_man_days' } = sub {
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my ($self, $value) = @_;
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if (@_ > 1) {
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return undef if !defined $value;
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$self->$attribute($value);
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}
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$value = $self->$attribute // 0;
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return $value >= 8.0 ? $value / 8.0 : $value;
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};
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*{ $package . '::' . $attribute . '_as_man_days_unit' } = sub {
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my ($self, $unit) = @_;
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if (@_ > 1) {
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return undef if !defined $unit;
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croak "Unknown unit '${unit}'" if $unit !~ m/^(?:h|hour|man_day)$/;
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$self->$attribute(($self->$attribute // 0) * 8.0) if $unit eq 'man_day';
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}
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return ($self->$attribute // 0) >= 8.0 ? 'man_day' : 'h'
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};
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*{ $package . '::' . $attribute . '_as_man_days_string' } = sub {
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my ($self, $value) = @_;
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my $method = "${attribute}_as_man_days";
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if (@_ > 1) {
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return undef if !defined $value;
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$self->$method($::form->parse_amount(\%::myconfig, $value));
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}
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return $::form->format_amount(\%::myconfig, $self->$method // 0, 2);
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};
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}
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1;
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__END__
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=pod
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=encoding utf8
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=head1 NAME
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SL::DB::Helper::AttrDuration - Attribute helper for duration stored in
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numeric columns
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=head1 SYNOPSIS
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# In a Rose model:
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use SL::DB::Helper::AttrDuration;
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__PACKAGE__->attr_duration('time_estimation');
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# Read access:
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print "Minutes: " . $obj->time_estimation_as_minutes . " hours: " . $obj->time_estimation_as_hours . "\n";
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# Use formatted strings in input fields in templates:
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<form method="post">
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...
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[% L.input_tag('time_estimation_as_duration_string', SELF.obj.time_estimation_as_duration_string) %]
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</form>
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=head1 OVERVIEW
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This is a helper for columns that store a duration as a numeric or
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floating point number representing a number of hours. So the value
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1.75 would stand for "1 hour, 45 minutes".
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The helper methods created are:
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=over 4
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=item C<attribute_as_minutes [$new_value]>
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Access only the minutes. Return values are in the range [0 - 59].
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=item C<attribute_as_hours [$new_value]>
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Access only the hours. Returns an integer value.
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=item C<attribute_as_duration_string [$new_value]>
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Access the full value as a formatted string according to the user's
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locale settings.
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=item C<attribute_as_man_days [$new_value]>
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Access the attribute as a number of man days which are assumed to be 8
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hours long. If the underlying attribute is less than 8 then the value
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itself will be returned. Otherwise the value divided by 8 is returned.
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If used as a setter then the underlying attribute is simply set to
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C<$new_value>. Intentional use is to set the man days first and the
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unit later, e.g.
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$obj->attribute_as_man_days($::form->{attribute_as_man_days});
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$obj->attribute_as_man_days_unit($::form->{attribute_as_man_days_unit});
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Note that L<SL::DB::Object/assign_attributes> is aware of this and
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handles this case correctly.
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=item C<attribute_as_man_days_unit [$new_unit]>
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Returns the unit that the number returned by L</attribute_as_man_days>
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represents. This can be either C<h> if the underlying attribute is
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less than 8 and C<man_day> otherwise.
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If used as a setter then the underlying attribute is multiplied by 8
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if C<$new_unit> equals C<man_day>. Otherwise the underlying attribute
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is not modified. Intentional use is to set the man days first and the
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unit later, e.g.
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$obj->attribute_as_man_days($::form->{attribute_as_man_days});
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$obj->attribute_as_man_days_unit($::form->{attribute_as_man_days_unit});
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Note that L<SL::DB::Object/assign_attributes> is aware of this and
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handles this case correctly.
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=back
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=head1 FUNCTIONS
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=over 4
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=item C<attr_duration @attributes>
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Package method. Call with the names of attributes for which the helper
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methods should be created.
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=back
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=head1 BUGS
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Nothing here yet.
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=head1 AUTHOR
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Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>
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=cut
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