r928@llin: dpavlin | 2006-09-09 20:24:06 +0200
[webpac2] / lib / WebPAC / Validate.pm
1 package WebPAC::Validate;
2
3 use warnings;
4 use strict;
5
6 use blib;
7
8 use base 'WebPAC::Common';
9 use File::Slurp;
10 use List::Util qw/first/;
11 use Data::Dump qw/dump/;
12 use WebPAC::Normalize qw/_pack_subfields_hash/;
13 use Storable qw/dclone/;
14
15 =head1 NAME
16
17 WebPAC::Validate - provide simple validation for records
18
19 =head1 VERSION
20
21 Version 0.07
22
23 =cut
24
25 our $VERSION = '0.07';
26
27 =head1 SYNOPSIS
28
29 This module provide a simple way to validate your file against a simple
30 configuration file in following format:
31
32   # field 10 doesn't have any subfields
33   10
34   # same with 101
35   101
36   # field 200 have valid subfields a-g
37   # and field e is repeatable
38   200 a b c d e* f g
39   # field 205 can have only subfield a
40   # and must exists
41   205! a
42   # while 210 can have a c or d
43   210 a c d
44
45 =head1 FUNCTIONS
46
47 =head2 new
48
49 Create new validation object
50
51   my $validate = new WebPAC::Validate(
52         path => 'conf/validate/file',
53   );
54
55 =cut
56
57 sub new {
58         my $class = shift;
59         my $self = {@_};
60         bless($self, $class);
61
62         my $log = $self->_get_logger();
63
64         foreach my $p (qw/path/) {
65                 $log->logconfess("need $p") unless ($self->{$p});
66         }
67
68         my $v_file = read_file( $self->{path} ) ||
69                 $log->logdie("can't open validate path $self->{path}: $!");
70
71         my $v;
72         my $curr_line = 1;
73
74         foreach my $l (split(/[\n\r]+/, $v_file)) {
75                 $curr_line++;
76
77                 # skip comments and whitespaces
78                 next if ($l =~ /^#/ || $l =~ /^\s*$/);
79
80                 $l =~ s/^\s+//;
81                 $l =~ s/\s+$//;
82
83                 my @d = split(/\s+/, $l);
84
85                 my $fld = shift @d;
86
87                 if ($fld =~ s/!$//) {
88                         $self->{must_exist}->{$fld}++;
89                 }
90
91                 $log->logdie("need field name in line $curr_line: $l") unless (defined($fld));
92
93                 if (@d) {
94                         $v->{$fld} = [ map {
95                                 my $sf = $_;
96                                 if ( $sf =~ s/!(\*)?$/$1/ ) {
97                                         $self->{must_exist_sf}->{ $fld }->{ $sf }++;
98                                 };
99                                 $sf;
100                         } @d ];
101                 } else {
102                         $v->{$fld} = 1;
103                 }
104
105         }
106
107         $log->debug("current validation rules: ", dump($v));
108
109         $self->{rules} = $v;
110
111         $log->info("validation uses rules from $self->{path}");
112
113         $self ? return $self : return undef;
114 }
115
116 =head2 validate_errors
117
118 Validate record and return errors
119
120   my @errors = $validate->validate_errors( $rec, $rec_dump );
121
122 =cut
123
124 sub validate_errors {
125         my $self = shift;
126
127         my $log = $self->_get_logger();
128
129         my $rec = shift || $log->logdie("validate_errors need record");
130         my $rec_dump = shift;
131
132         $log->logdie("rec isn't HASH") unless (ref($rec) eq 'HASH');
133         $log->logdie("can't find validation rules") unless (my $r = $self->{rules});
134
135         my $errors;
136
137         $log->debug("rec = ", sub { dump($rec) }, "keys = ", keys %{ $rec });
138
139         my $fields;
140
141         foreach my $f (keys %{ $rec }) {
142
143                 next if (!defined($f) || $f eq '' || $f eq '000');
144
145                 $fields->{$f}++;
146
147                 if ( ! defined($r->{$f}) ) {
148                         $errors->{field}->{ $f }->{unexpected} = "this field is not expected";
149                         next;
150                 }
151
152
153                 if (ref($rec->{$f}) ne 'ARRAY') {
154                         $errors->{field}->{ $f }->{not_repeatable} = "probably bug in parsing input data";
155                         next;
156                 }
157
158                 foreach my $v (@{ $rec->{$f} }) {
159                         # can we have subfields?
160                         if (ref($r->{$f}) eq 'ARRAY') {
161                                 # are values hashes? (has subfields)
162                                 if (! defined($v)) {
163 #                                       $errors->{field}->{$f}->{empty} = undef;
164 #                                       $errors->{dump} = $rec_dump if ($rec_dump);
165                                 } elsif (ref($v) ne 'HASH') {
166                                         $errors->{field}->{$f}->{missing_subfield} = join(",", @{ $r->{$f} }) . " required";
167                                         next;
168                                 } else {
169
170                                         my $h = dclone( $v );
171
172                                         my $sf_repeatable;
173
174                                         delete($v->{subfields}) if (defined($v->{subfields}));
175
176                                         my $subfields;
177
178                                         foreach my $sf (keys %{ $v }) {
179
180                                                 $subfields->{ $sf }++;
181
182                                                 # is non-repeatable but with multiple values?
183                                                 if ( ! first { $_ eq $sf.'*' } @{$r->{$f}} ) {
184                                                         if ( ref($v->{$sf}) eq 'ARRAY' ) {
185                                                                 $sf_repeatable->{$sf}++;
186                                                         };
187                                                         if (! first { $_ eq $sf } @{ $r->{$f} }) {
188                                                                 $errors->{field}->{ $f }->{subfield}->{extra}->{$sf}++;
189                                                         }
190                                                 }
191
192                                         }
193                                         if (my @r_sf = sort keys( %$sf_repeatable )) {
194
195                                                 foreach my $sf (@r_sf) {
196                                                         $errors->{field}->{$f}->{subfield}->{extra_repeatable}->{$sf}++;
197                                                         $errors->{field}->{$f}->{dump} =
198                                                                 join('', _pack_subfields_hash( $h, 1 ) );
199                                                 }
200
201                                         }
202
203                                         if ( defined( $self->{must_exist_sf}->{$f} ) ) {
204                                                 foreach my $sf (sort keys %{ $self->{must_exist_sf}->{$f} }) {
205 #warn "====> $f $sf must exist\n";
206                                                         $errors->{field}->{$f}->{subfield}->{missing}->{$sf}++
207                                                                 unless defined( $subfields->{$sf} );
208                                                 }
209                                         }
210
211                                 }
212                         } elsif (ref($v) eq 'HASH') {
213                                 $errors->{field}->{$f}->{unexpected_subfields}++;
214                                 $errors->{field}->{$f}->{dump} =
215                                         join('', _pack_subfields_hash( $v, 1 ) );
216                         }
217                 }
218         }
219
220         foreach my $must (sort keys %{ $self->{must_exist} }) {
221                 next if ($fields->{$must});
222                 $errors->{field}->{$must}->{missing}++;
223                 $errors->{dump} = $rec_dump if ($rec_dump);
224         }
225
226         if ($errors) {
227                 $log->debug("errors: ", sub { dump( $errors ) } );
228
229                 my $mfn = $rec->{'000'}->[0] || $log->logconfess("record ", dump( $rec ), " doesn't have MFN");
230                 $self->{errors}->{$mfn} = $errors;
231         }
232
233         #$log->logcluck("return from this function is ARRAY") unless wantarray;
234
235         return $errors;
236 }
237
238 =head2 reset_errors
239
240 Clean all accumulated errors for this input
241
242   $validate->reset_errors;
243
244 =cut
245
246 sub reset_errors {
247         my $self = shift;
248         delete ($self->{errors});
249 }
250
251 =head2 all_errors
252
253 Return hash with all errors
254
255   print dump( $validate->all_errors );
256
257 =cut
258
259 sub all_errors {
260         my $self = shift;
261         return $self->{errors};
262 }
263
264 =head2 report
265
266 Produce nice humanly readable report of errors
267
268   print $validate->report;
269
270 =cut
271
272 sub report {
273         my $self = shift;
274
275         sub unroll {
276                 my ($rest,$o, $dump) = @_;
277
278 #warn "# rest: $rest o: $o\n";
279
280                 return unless ($rest);
281
282                 if (ref($rest) ne 'HASH') {
283                         $o .= "($rest)";
284                         return ($o,$dump);
285                 }
286
287                 foreach my $k (sort keys %{ $rest }) {
288
289                         if ($k eq 'dump') {
290                                 $dump = $rest->{dump};
291                                 warn "## dump: $dump\n";
292                                 next;
293                         }
294                         my $u;
295                         ($u, $dump) = unroll($rest->{$k}, $o, $dump);
296                         $o .= "$k $u";
297
298
299                 }
300                 return ($o,$dump);
301         }
302
303         my $out = '';
304
305         foreach my $mfn (sort keys %{ $self->{errors} }) {
306                 my ($msg,$dump) = unroll( $self->{errors}->{$mfn}, '', '' );
307                 $out .= "MFN $mfn\n$msg\t$dump\n\n";
308         }
309
310         return $out;
311 }
312
313 =head1 AUTHOR
314
315 Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
316
317 =head1 COPYRIGHT & LICENSE
318
319 Copyright 2006 Dobrica Pavlinusic, All Rights Reserved.
320
321 This program is free software; you can redistribute it and/or modify it
322 under the same terms as Perl itself.
323
324 =cut
325
326 1; # End of WebPAC::Validate