/[webpac2]/trunk/lib/WebPAC/Lookup.pm
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revision 4 by dpavlin, Sat Jul 16 12:37:18 2005 UTC revision 251 by dpavlin, Thu Dec 15 14:12:00 2005 UTC
# Line 3  package WebPAC::Lookup; Line 3  package WebPAC::Lookup;
3  use warnings;  use warnings;
4  use strict;  use strict;
5    
6  use WebPAC::Common;  use base qw/WebPAC::Common WebPAC::Normalize/;
   
 use base qw/WebPAC::Common/;  
7  use File::Slurp;  use File::Slurp;
8    use YAML qw/LoadFile/;
9  use Data::Dumper;  use Data::Dumper;
10    
11  =head1 NAME  =head1 NAME
# Line 15  WebPAC::Lookup - simple normalisation pl Line 14  WebPAC::Lookup - simple normalisation pl
14    
15  =head1 VERSION  =head1 VERSION
16    
17  Version 0.01  Version 0.02
18    
19  =cut  =cut
20    
21  our $VERSION = '0.01';  our $VERSION = '0.02';
22    
23  =head1 SYNOPSIS  =head1 SYNOPSIS
24    
# Line 42  value in lookup. Line 41  value in lookup.
41      'val' => 'v900' },      'val' => 'v900' },
42   ];   ];
43    
44    Just for a reference, lookup data is internally stored in
45    C<< $self->{'_lookup_data'} >>.
46    
47  =head1 FUNCTIONS  =head1 FUNCTIONS
48    
# Line 51  Create new lookup object. Line 52  Create new lookup object.
52    
53    my $lookup = new WebPAC::Lookup(    my $lookup = new WebPAC::Lookup(
54          lookup_file => '/path/to/conf/lookup/lookup.pm',          lookup_file => '/path/to/conf/lookup/lookup.pm',
55            is_lookup_regex => 'lookup{[^\{\}]+}';
56            save_lookup_regex => 'lookup{([^\{\}]+)}';
57    );    );
58    
59  =cut  =cut
# Line 66  sub new { Line 69  sub new {
69    
70          my $lookup_code = read_file($lookup_file) || $log->logconfess("can't read lookup file $lookup_file: $!");          my $lookup_code = read_file($lookup_file) || $log->logconfess("can't read lookup file $lookup_file: $!");
71    
72          {          if ($lookup_file =~ m#\.pm$#) {
73                  no strict 'vars';                  no strict 'vars';
74                  do $lookup_file or $log->logdie("Failed to read configuration parameters '$lookup_file' $! $@");                  do $lookup_file or $log->logdie("Failed to read configuration parameters '$lookup_file' $! $@");
75                  $self->{'lookup_def'} = \@lookup || $log->logdie("lookup config $lookup_file doesn't produce \@lookup array");                  $self->{'lookup_def'} = \@lookup || $log->logdie("lookup config $lookup_file doesn't produce \@lookup array");
76            } elsif ($lookup_file =~ m#\.(:?yml|yaml)$#) {
77                    my $yaml = LoadFile( $lookup_file ) || $log->logdie("lookup YAML file $lookup_file error: $!");
78                    $self->{'lookup_def'} = $yaml->{lookup} || $log->logdie("lookup YAML file $lookup_file should begin with 'lookup:'");
79            } else {
80                    $log->logide("unsupported lookup file $lookup_file");
81          }          }
82            $log->debug("lookup_def: " . Dumper( $self->{lookup_def} ));
83    
84            $log->logconfess("lookup config file isn't ARRAY but ", sub { Dumper( $self->{'lookup_def'} ) }) if ($self->{'lookup_def'} !~ /ARRAY/o);
85    
86            $self->{'is_lookup_regex'} ||= 'lookup{\[[^\{\}]+\]}';
87            $self->{'save_lookup_regex'} ||= 'lookup{([^\{\}]+)}';
88    
89    
90          $log->logconfess("lookup config file isn't ARRAY", sub { Dumper( $self->{'lookup_def'} ) }) if ($self->{'lookup_def'} !~ /ARRAY/o);          $self->{'LOOKUP_REGEX'} = qr/$self->{'is_lookup_regex'}/;
91            $self->{'LOOKUP_REGEX_SAVE'} = qr/$self->{'save_lookup_regex'}/;
92    
93            $log->debug("regexps lookup:", $self->{'LOOKUP_REGEX'}, " save:", $self->{'LOOKUP_REGEX_SAVE'});
94    
95          $self ? return $self : return undef;          $self ? return $self : return undef;
96  }  }
# Line 81  sub new { Line 99  sub new {
99    
100  Create lookup from record using lookup definition.  Create lookup from record using lookup definition.
101    
102   $self->create_lookup($rec);   $self->add($rec);
103    
104  Returns true if this record produced lookup.  Returns true if this record produced lookup.
105    
106  =cut  =cut
107    
108  sub add($) {  sub add {
109          my $self = shift;          my $self = shift;
110    
111          my $log = $self->_get_logger();          my $log = $self->_get_logger();
# Line 99  sub add($) { Line 117  sub add($) {
117          my $n = 0;          my $n = 0;
118    
119          foreach my $i (@{ $self->{'lookup_def'} }) {          foreach my $i (@{ $self->{'lookup_def'} }) {
120                  $log->logconfess("need key") unless defined($i->{'key'});                  $log->logconfess("need key in ", Dumper($i) ) unless defined($i->{'key'});
121                  $log->logconfess("need val") unless defined($i->{'val'});                  $log->logconfess("need val in ", Dumper($i) ) unless defined($i->{'val'});
122    
123                  $n++;                  $n++;
124    
# Line 111  sub add($) { Line 129  sub add($) {
129                                  my $key = $self->fill_in($rec,$i->{'key'}) || next;                                  my $key = $self->fill_in($rec,$i->{'key'}) || next;
130                                  my @val = $self->fill_in($rec,$i->{'val'}) || next;                                  my @val = $self->fill_in($rec,$i->{'val'}) || next;
131                                  $log->debug("stored $key = ",sub { join(" | ",@val) });                                  $log->debug("stored $key = ",sub { join(" | ",@val) });
132                                  push @{$self->{'lookup'}->{$key}}, @val;                                  push @{$self->{'_lookup_data'}->{$key}}, @val;
133                          }                          }
134                  } else {                  } else {
135                          my $key = $self->fill_in($rec,$i->{'key'}) || next;                          my $key = $self->fill_in($rec,$i->{'key'}) || next;
136                          my @val = $self->fill_in($rec,$i->{'val'}) || next;                          my @val = $self->fill_in($rec,$i->{'val'}) || next;
137                          $log->debug("stored $key = ",sub { join(" | ",@val) });                          $log->debug("stored $key = ",sub { join(" | ",@val) });
138                          push @{$self->{'lookup'}->{$key}}, @val;                          push @{$self->{'_lookup_data'}->{$key}}, @val;
139                  }                  }
140          }          }
141    
142          return $n;          return $n;
143  }  }
144    
145    =head2 lookup
146    
147    Perform lookups on format supplied to it.
148    
149     my $text = $lookup->lookup('[v900]');
150    
151    Lookups can be nested (like C<[d:[a:[v900]]]>).
152    
153    =cut
154    
155    sub lookup {
156            my $self = shift;
157    
158            my $log = $self->_get_logger();
159    
160            my $tmp = shift || $log->logconfess("need format");
161    
162            if ($tmp =~ $self->{'LOOKUP_REGEX'}) {
163                    my @in = ( $tmp );
164    
165                    $log->debug("lookup for: ",$tmp);
166    
167                    my @out;
168                    while (my $f = shift @in) {
169                            if ($f =~ $self->{'LOOKUP_REGEX_SAVE'}) {
170                                    my $k = $1;
171                                    if ($self->{'_lookup_data'}->{$k}) {
172                                            foreach my $nv (@{$self->{'_lookup_data'}->{$k}}) {
173                                                    my $tmp2 = $f;
174                                                    $tmp2 =~ s/lookup{$k}/$nv/g;
175                                                    push @in, $tmp2;
176                                            }
177                                    } else {
178                                            undef $f;
179                                    }
180                            } elsif ($f) {
181                                    push @out, $f;
182                            }
183                    }
184                    $log->logconfess("return is array and it's not expected!") unless wantarray;
185                    return @out;
186            } else {
187                    return $tmp;
188            }
189    }
190    
191    =head2 regex
192    
193    Returns precompiled regex for lookup format.
194    
195     if ($foo =~ $lookup->reges) { ... }
196    
197    =cut
198    
199    sub regex {
200            my $self = shift;
201    
202            return $self->{'LOOKUP_REGEX'};
203    }
204    
205  =head1 AUTHOR  =head1 AUTHOR
206    
207  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
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