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package WebPAC::Validate; |
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|
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use warnings; |
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use strict; |
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|
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use blib; |
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|
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use base 'WebPAC::Common'; |
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use File::Slurp; |
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use List::Util qw/first/; |
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use Data::Dump qw/dump/; |
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use WebPAC::Normalize qw/_pack_subfields_hash/; |
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use Storable qw/dclone/; |
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|
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=head1 NAME |
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|
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WebPAC::Validate - provide simple validation for records |
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|
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=head1 VERSION |
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|
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Version 0.10 |
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|
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=cut |
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|
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our $VERSION = '0.10'; |
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|
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=head1 SYNOPSIS |
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|
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This module provide a simple way to validate your file against a simple |
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configuration file in following format: |
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|
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# field 10 doesn't have any subfields |
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10 |
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# same with 101 |
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101 |
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# field 200 have valid subfields a-g |
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# and field e is repeatable |
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200 a b c d e* f g |
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# field 205 can have only subfield a |
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# and must exists |
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205! a |
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# while 210 can have a c or d |
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210 a c d |
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# field which is ignored in validation |
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999- |
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|
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=head1 FUNCTIONS |
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|
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=head2 new |
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|
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Create new validation object |
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|
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my $validate = new WebPAC::Validate( |
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path => 'conf/validate/file', |
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); |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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|
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my $log = $self->_get_logger(); |
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|
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foreach my $p (qw/path/) { |
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$log->logconfess("need $p") unless ($self->{$p}); |
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} |
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|
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my $v_file = read_file( $self->{path} ) || |
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$log->logdie("can't open validate path $self->{path}: $!"); |
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|
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my $v; |
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my $curr_line = 1; |
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|
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foreach my $l (split(/[\n\r]+/, $v_file)) { |
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$curr_line++; |
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|
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# skip comments and whitespaces |
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next if ($l =~ /^#/ || $l =~ /^\s*$/); |
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|
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$l =~ s/^\s+//; |
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$l =~ s/\s+$//; |
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|
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my @d = split(/\s+/, $l); |
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|
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my $fld = shift @d; |
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|
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if ($fld =~ s/!$//) { |
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$self->{must_exist}->{$fld}++; |
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} elsif ($fld =~ s/-$//) { |
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$self->{dont_validate}->{$fld}++; |
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} |
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|
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$log->logdie("need field name in line $curr_line: $l") unless (defined($fld)); |
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|
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if (@d) { |
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$v->{$fld} = [ map { |
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my $sf = $_; |
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if ( $sf =~ s/!(\*)?$/$1/ ) { |
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$self->{must_exist_sf}->{ $fld }->{ $sf }++; |
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}; |
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$sf; |
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} @d ]; |
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} else { |
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$v->{$fld} = 1; |
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} |
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|
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} |
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|
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$log->debug("current validation rules: ", dump($v)); |
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|
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$self->{rules} = $v; |
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|
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$log->info("validation uses rules from $self->{path}"); |
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|
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$self ? return $self : return undef; |
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} |
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|
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=head2 validate_rec |
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|
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Validate record and return errors |
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|
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my @errors = $validate->validate_rec( $rec, $rec_dump ); |
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|
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=cut |
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|
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sub validate_rec { |
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my $self = shift; |
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|
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my $log = $self->_get_logger(); |
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|
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my $rec = shift || $log->logdie("validate_rec need record"); |
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my $rec_dump = shift; |
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|
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$log->logdie("rec isn't HASH") unless (ref($rec) eq 'HASH'); |
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$log->logdie("can't find validation rules") unless (my $r = $self->{rules}); |
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|
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my $errors; |
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|
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$log->debug("rec = ", sub { dump($rec) }, "keys = ", keys %{ $rec }); |
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|
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my $fields; |
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|
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foreach my $f (keys %{ $rec }) { |
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|
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next if (!defined($f) || $f eq '' || $f eq '000'); |
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|
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next if (defined( $self->{dont_validate}->{$f} )); |
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|
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# track field usage |
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$fields->{$f}++; |
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|
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if ( ! defined($r->{$f}) ) { |
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$errors->{ $f }->{unexpected} = "this field is not expected"; |
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next; |
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} |
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|
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|
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if (ref($rec->{$f}) ne 'ARRAY') { |
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$errors->{ $f }->{not_repeatable} = "probably bug in parsing input data"; |
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next; |
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} |
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|
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foreach my $v (@{ $rec->{$f} }) { |
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# can we have subfields? |
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if (ref($r->{$f}) eq 'ARRAY') { |
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# are values hashes? (has subfields) |
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if (! defined($v)) { |
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# $errors->{$f}->{empty} = undef; |
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# $errors->{dump} = $rec_dump if ($rec_dump); |
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} elsif (ref($v) ne 'HASH') { |
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$errors->{$f}->{missing_subfield} = join(",", @{ $r->{$f} }) . " required"; |
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next; |
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} else { |
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|
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my $h = dclone( $v ); |
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|
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my $sf_repeatable; |
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|
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delete($v->{subfields}) if (defined($v->{subfields})); |
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|
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my $subfields; |
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|
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foreach my $sf (keys %{ $v }) { |
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|
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$subfields->{ $sf }++; |
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|
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# is non-repeatable but with multiple values? |
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if ( ! first { $_ eq $sf.'*' } @{$r->{$f}} ) { |
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if ( ref($v->{$sf}) eq 'ARRAY' ) { |
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$sf_repeatable->{$sf}++; |
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}; |
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if (! first { $_ eq $sf } @{ $r->{$f} }) { |
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$errors->{ $f }->{subfield}->{extra}->{$sf}++; |
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} |
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} |
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|
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} |
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if (my @r_sf = sort keys( %$sf_repeatable )) { |
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|
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foreach my $sf (@r_sf) { |
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$errors->{$f}->{subfield}->{extra_repeatable}->{$sf}++; |
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$errors->{$f}->{dump} = _pack_subfields_hash( $h, 1 ); |
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} |
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|
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} |
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|
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if ( defined( $self->{must_exist_sf}->{$f} ) ) { |
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foreach my $sf (sort keys %{ $self->{must_exist_sf}->{$f} }) { |
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#warn "====> $f $sf must exist\n"; |
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$errors->{$f}->{subfield}->{missing}->{$sf}++ |
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unless defined( $subfields->{$sf} ); |
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} |
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} |
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|
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} |
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} elsif (ref($v) eq 'HASH') { |
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$errors->{$f}->{unexpected_subfields}++; |
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$errors->{$f}->{dump} = _pack_subfields_hash( $v, 1 ); |
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} |
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} |
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} |
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|
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foreach my $must (sort keys %{ $self->{must_exist} }) { |
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next if ($fields->{$must}); |
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$errors->{$must}->{missing}++; |
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$errors->{dump} = $rec_dump if ($rec_dump); |
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} |
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|
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if ($errors) { |
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$log->debug("errors: ", $self->report_error( $errors ) ); |
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|
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my $mfn = $rec->{'000'}->[0] || $log->logconfess("record ", dump( $rec ), " doesn't have MFN"); |
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$self->{errors}->{$mfn} = $errors; |
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} |
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|
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#$log->logcluck("return from this function is ARRAY") unless wantarray; |
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|
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return $errors; |
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} |
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|
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=head2 reset_errors |
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|
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Clean all accumulated errors for this input |
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|
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$validate->reset_errors; |
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|
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=cut |
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|
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sub reset_errors { |
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my $self = shift; |
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delete ($self->{errors}); |
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} |
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|
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=head2 all_errors |
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|
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Return hash with all errors |
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|
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print dump( $validate->all_errors ); |
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|
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=cut |
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|
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sub all_errors { |
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my $self = shift; |
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return $self->{errors}; |
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} |
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|
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=head2 report_error |
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|
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Produce nice humanly readable report of single error |
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|
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print $validate->report_error( $error_hash ); |
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|
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=cut |
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|
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sub report_error { |
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my $self = shift; |
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|
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my $h = shift || die "no hash?"; |
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|
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sub _unroll { |
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my ($self, $tree, $accumulated) = @_; |
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|
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my $log = $self->_get_logger(); |
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|
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$log->debug("# ", |
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( $tree ? "tree: $tree " : '' ), |
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( $accumulated ? "accumulated: $accumulated " : '' ), |
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); |
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|
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my $results; |
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|
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if (ref($tree) ne 'HASH') { |
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return ("$accumulated\t($tree)", undef); |
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} |
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|
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my $dump; |
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|
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foreach my $k (sort keys %{ $tree }) { |
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|
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if ($k eq 'dump') { |
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$dump = $tree->{dump}; |
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# warn "## dump: ",dump($dump),"\n"; |
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next; |
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} |
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|
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$log->debug("current: $k"); |
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|
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my ($new_results, $new_dump) = $self->_unroll($tree->{$k}, |
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$accumulated ? "$accumulated\t$k" : $k |
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); |
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|
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$log->debug( |
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( $new_results ? "new_results: " . dump($new_results) ." " : '' ), |
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); |
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|
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push @$results, $new_results if ($new_results); |
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$dump = $new_dump if ($new_dump); |
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|
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} |
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|
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$log->debug( |
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( $results ? "results: " . dump($results) ." " : '' ), |
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); |
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|
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if ($#$results == 0) { |
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return ($results->[0], $dump); |
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} else { |
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return ($results, $dump); |
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} |
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} |
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|
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|
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sub _reformat { |
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my $l = shift; |
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$l =~ s/\t/ /g; |
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$l =~ s/_/ /; |
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return $l; |
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} |
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|
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my $out = ''; |
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|
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for my $f (sort keys %{ $h }) { |
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$out .= "$f: "; |
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|
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my ($r, $d) = $self->_unroll( $h->{$f} ); |
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my $e; |
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if (ref($r) eq 'ARRAY') { |
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$e .= join(", ", map { _reformat( $_ ) } @$r); |
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} else { |
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$e .= _reformat( $r ); |
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} |
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$e .= "\n\t$d" if ($d); |
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|
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$out .= $e . "\n"; |
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} |
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return $out; |
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} |
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|
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|
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=head2 report |
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|
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Produce nice humanly readable report of errors |
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|
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print $validate->report; |
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|
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=cut |
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|
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sub report { |
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my $self = shift; |
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my $e = $self->{errors} || return; |
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|
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my $out; |
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foreach my $mfn (sort { $a <=> $b } keys %$e) { |
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$out .= "MFN $mfn\n" . $self->report_error( $e->{$mfn} ) . "\n"; |
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} |
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|
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return $out; |
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|
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} |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2006 Dobrica Pavlinusic, All Rights Reserved. |
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|
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # End of WebPAC::Validate |
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