| 1 |
package WebPAC::Input::DBF; |
| 2 |
|
| 3 |
use warnings; |
| 4 |
use strict; |
| 5 |
|
| 6 |
use WebPAC::Input; |
| 7 |
use WebPAC::Input::Helper; |
| 8 |
use base qw/WebPAC::Common WebPAC::Input::Helper/; |
| 9 |
use XBase; |
| 10 |
use Data::Dump qw/dump/; |
| 11 |
use Encode qw/encode_utf8/; |
| 12 |
use YAML qw/LoadFile DumpFile/; |
| 13 |
|
| 14 |
=head1 NAME |
| 15 |
|
| 16 |
WebPAC::Input::DBF - support for reading DBF tables |
| 17 |
|
| 18 |
=head1 VERSION |
| 19 |
|
| 20 |
Version 0.01 |
| 21 |
|
| 22 |
=cut |
| 23 |
|
| 24 |
our $VERSION = '0.01'; |
| 25 |
|
| 26 |
=head1 SYNOPSIS |
| 27 |
|
| 28 |
Read data from DBF tables (do you remember Clipper applications?) and create |
| 29 |
pseudo-MARC records from them. |
| 30 |
|
| 31 |
my $ll_db = new WebPAC::Input::DBF( |
| 32 |
path => '/path/to/database.dbf', |
| 33 |
); |
| 34 |
|
| 35 |
=head1 FUNCTIONS |
| 36 |
|
| 37 |
=head2 new |
| 38 |
|
| 39 |
Returns new low-level input API object |
| 40 |
|
| 41 |
my $ll_db = new WebPAC::Input::DBF( |
| 42 |
path => '/path/to/database.dbf' |
| 43 |
mapping_path => '/path/to/input/dbf/mapping.yml', |
| 44 |
filter => sub { |
| 45 |
my ($l,$field_nr) = @_; |
| 46 |
# do something with $l which is line of input file |
| 47 |
return $l; |
| 48 |
}, |
| 49 |
} |
| 50 |
|
| 51 |
Options: |
| 52 |
|
| 53 |
=over 4 |
| 54 |
|
| 55 |
=item path |
| 56 |
|
| 57 |
path to DBF file |
| 58 |
|
| 59 |
=item mapping_path |
| 60 |
|
| 61 |
path to mapping YAML which will be created on first run |
| 62 |
|
| 63 |
=back |
| 64 |
|
| 65 |
=cut |
| 66 |
|
| 67 |
sub new { |
| 68 |
my $class = shift; |
| 69 |
my $self = {@_}; |
| 70 |
bless($self, $class); |
| 71 |
|
| 72 |
my $arg = {@_}; |
| 73 |
|
| 74 |
my $log = $self->_get_logger(); |
| 75 |
|
| 76 |
$log->logconfess("this module requires input_config") unless ( $arg->{input_config} ); |
| 77 |
|
| 78 |
my $db = XBase->new( $arg->{path} ) || $log->logdie("can't open ", $arg->{path}, ": $!"); |
| 79 |
|
| 80 |
my $size = $db->last_record; |
| 81 |
|
| 82 |
$log->info("opening DBF database '$arg->{path}' with $size records"); |
| 83 |
|
| 84 |
my $mapping_path = $arg->{input_config}->{mapping_path} || $self->{input_config}->{mapping_path}; |
| 85 |
my $mapping; |
| 86 |
|
| 87 |
if ( ! $mapping_path || ! -e $mapping_path ) { |
| 88 |
$log->debug("didn't found any mapping_path in configuration", sub { dump( $arg->{input_config} ) }); |
| 89 |
|
| 90 |
foreach my $field ( $db->field_names ) { |
| 91 |
push @$mapping, { $field => { '900' => 'x' } }; |
| 92 |
} |
| 93 |
|
| 94 |
my $mapping_path = $arg->{path}; |
| 95 |
$mapping_path =~ s!^.+/([^/]+)\.dbf!$1.yml!; |
| 96 |
|
| 97 |
$log->logdie("mapping file $mapping_path allready exists, aborting.") if ( -e $mapping_path ); |
| 98 |
|
| 99 |
DumpFile( $mapping_path, { mapping => $mapping } ) || |
| 100 |
$log->logdie("can't write template file for mapping_path $mapping_path: $!"); |
| 101 |
|
| 102 |
$log->logdie("template file for mapping_path created as $mapping_path"); |
| 103 |
|
| 104 |
} else { |
| 105 |
$mapping = LoadFile( $mapping_path ) || $log->logdie("can't open $mapping_path: $!"); |
| 106 |
$log->logdie("missing top-level mapping key in $mapping_path") unless ( $mapping->{mapping} ); |
| 107 |
$mapping = $mapping->{mapping}; |
| 108 |
$log->debug("using mapping from $mapping_path = ", sub { dump($mapping) }); |
| 109 |
} |
| 110 |
|
| 111 |
foreach my $mfn ( 1 .. $size ) { |
| 112 |
|
| 113 |
my $row = $db->get_record_as_hash( $mfn ); |
| 114 |
|
| 115 |
$log->debug("dbf row = ", sub { dump( $row ) }); |
| 116 |
|
| 117 |
my $record = { |
| 118 |
'001' => [ $mfn ], |
| 119 |
}; |
| 120 |
|
| 121 |
# fixme -- this *will* break given wrong structure! |
| 122 |
foreach my $m ( @$mapping ) { |
| 123 |
my $db_field = (keys %$m)[0]; |
| 124 |
my ( $f, $sf ) = %{ $m->{$db_field} }; |
| 125 |
push @{ $record->{$f} }, '^' . $sf . $row->{$db_field} if ( defined( $row->{$db_field} ) && $row->{$db_field} ne '' ); |
| 126 |
} |
| 127 |
|
| 128 |
$self->{_rows}->{ $mfn } = $record; |
| 129 |
$log->debug("created row $mfn ", dump( $record )); |
| 130 |
} |
| 131 |
|
| 132 |
$self->{size} = $size; |
| 133 |
|
| 134 |
$self ? return $self : return undef; |
| 135 |
} |
| 136 |
|
| 137 |
=head2 fetch_rec |
| 138 |
|
| 139 |
Return record with ID C<$mfn> from database |
| 140 |
|
| 141 |
my $rec = $ll_db->fetch_rec( $mfn, $filter_coderef ); |
| 142 |
|
| 143 |
=cut |
| 144 |
|
| 145 |
sub fetch_rec { |
| 146 |
my $self = shift; |
| 147 |
|
| 148 |
my ($mfn, $filter_coderef) = @_; |
| 149 |
|
| 150 |
my $rec = $self->_to_hash( |
| 151 |
mfn => $mfn, |
| 152 |
row => $self->{_rows}->{$mfn}, |
| 153 |
hash_filter => $filter_coderef, |
| 154 |
); |
| 155 |
|
| 156 |
my $log = $self->_get_logger(); |
| 157 |
$log->debug("fetch_rec($mfn) = ", dump($rec)); |
| 158 |
|
| 159 |
return $rec; |
| 160 |
} |
| 161 |
|
| 162 |
=head2 size |
| 163 |
|
| 164 |
Return number of records in database |
| 165 |
|
| 166 |
my $size = $ll_db->size; |
| 167 |
|
| 168 |
=cut |
| 169 |
|
| 170 |
sub size { |
| 171 |
my $self = shift; |
| 172 |
return $self->{size}; |
| 173 |
} |
| 174 |
|
| 175 |
=head1 AUTHOR |
| 176 |
|
| 177 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
| 178 |
|
| 179 |
=head1 COPYRIGHT & LICENSE |
| 180 |
|
| 181 |
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
| 182 |
|
| 183 |
This program is free software; you can redistribute it and/or modify it |
| 184 |
under the same terms as Perl itself. |
| 185 |
|
| 186 |
=cut |
| 187 |
|
| 188 |
1; # End of WebPAC::Input::DBF |
Parent Directory
| 
Revision Log