Dave Cross: Still Munging Data With Perl: Online event - Mar 17 Learn more

CAMELCASE / HTML-TurboForm-0.33 / lib / HTML / TurboForm / Constraint / Equation.pm 

            

              
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
—
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

              
package HTML::TurboForm::Constraint::Equation;
use warnings;
use strict;
use base qw(HTML::TurboForm::Constraint);
__PACKAGE__->mk_accessors( qw/ operator comp / );
sub check{
  my ($self)=@_;
  my $result=0;
  my $request=$self->request;
  my $op=''; 
  my $comp_val;
  my $val=$request->{ $self->name };
  $op=          $self->operator;
  $comp_val =   $self->comp ;
  if (($op eq "eq") or ($op eq "ne")) {
    $val="'$val'";
    $comp_val="'$comp_val'";
  }
  if ($val and $op and $comp_val ){
    my $equation=$val." ".$op." ".$comp_val ;
    return 1 if( eval($equation) );
  }
  return 0;  
}
sub message{
  my ($self)=@_;
  return $self->text;
}
1;
__END__
=head1 HTML::TurboForm::Constraint::Equation
Representation class for Equation constraint.
=head1 DESCRIPTION
The equation constraint is supposed to be used whenever two values are to be compared. 
You have to give it the perl operator (ne, eq, <,>, whatever) and the two values to be compared via the params hash.
Straight forward so no need for much documentation. See HTML::TurboForm doku for mopre details.
=head1 METHODS
=head2 check
Arguments: none
returns 1 if valid, otherwise 0.
=head2 message
Arguments: none
returns Errormessage of Element which is connected to constraint.
=head1 AUTHOR
Thorsten Domsch, tdomsch@gmx.de
=cut