1 |
dpavlin |
869 |
package WebPAC::Input::DBF; |
2 |
|
|
|
3 |
|
|
use warnings; |
4 |
|
|
use strict; |
5 |
|
|
|
6 |
|
|
use WebPAC::Input; |
7 |
|
|
use base qw/WebPAC::Common/; |
8 |
|
|
use XBase; |
9 |
|
|
use Data::Dump qw/dump/; |
10 |
|
|
use Encode qw/encode_utf8/; |
11 |
|
|
use YAML; |
12 |
|
|
use File::Slurp; |
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 $ll_db = new WebPAC::Input::DBF( |
42 |
|
|
path => '/path/to/database.dbf' |
43 |
|
|
filter => sub { |
44 |
|
|
my ($l,$field_nr) = @_; |
45 |
|
|
# do something with $l which is line of input file |
46 |
|
|
return $l; |
47 |
|
|
}, |
48 |
|
|
} |
49 |
|
|
|
50 |
|
|
Options: |
51 |
|
|
|
52 |
|
|
=over 4 |
53 |
|
|
|
54 |
|
|
=item path |
55 |
|
|
|
56 |
|
|
path to DBF file |
57 |
|
|
|
58 |
|
|
=back |
59 |
|
|
|
60 |
|
|
=cut |
61 |
|
|
|
62 |
|
|
sub new { |
63 |
|
|
my $class = shift; |
64 |
|
|
my $self = {@_}; |
65 |
|
|
bless($self, $class); |
66 |
|
|
|
67 |
|
|
my $arg = {@_}; |
68 |
|
|
|
69 |
|
|
my $log = $self->_get_logger(); |
70 |
|
|
|
71 |
|
|
my $db = XBase->new( $arg->{path} ) || $log->logdie("can't open ", $arg->{path}, ": $!"); |
72 |
|
|
|
73 |
|
|
my $size = $db->last_record; |
74 |
|
|
|
75 |
|
|
$log->info("opening DBF database '$arg->{path}' with $size records"); |
76 |
|
|
|
77 |
|
|
my $mapping = $arg->{input_config}->{mapping}; |
78 |
|
|
|
79 |
|
|
if ( ! $mapping ) { |
80 |
|
|
$log->debug("didn't found any mapping file in configuration", sub { dump( $arg->{input_config} ) }); |
81 |
|
|
|
82 |
|
|
foreach my $field ( $db->field_names ) { |
83 |
|
|
push @$mapping, { $field => { '900' => 'x' } }; |
84 |
|
|
} |
85 |
|
|
|
86 |
|
|
my $mapping_path = $arg->{path}; |
87 |
|
|
$mapping_path =~ s!^.+/([^/]+)\.dbf!$1.yml!; |
88 |
|
|
|
89 |
|
|
$log->logdie("mapping file $mapping_path allready exists, aborting.") if ( -e $mapping_path ); |
90 |
|
|
|
91 |
|
|
write_file( $mapping_path, Dump( { mapping => $mapping } ) ) || |
92 |
|
|
$log->logdie("can't write template file for mapping_path $mapping_path: $!"); |
93 |
|
|
|
94 |
|
|
$log->logdie("template file for mapping_path created as $mapping_path"); |
95 |
|
|
|
96 |
|
|
} else { |
97 |
|
|
$log->debug("using mapping ", sub { dump($mapping) }); |
98 |
|
|
} |
99 |
|
|
|
100 |
|
|
foreach my $mfn ( 1 .. $size ) { |
101 |
|
|
|
102 |
|
|
my $row = $db->get_record_as_hash( $mfn ); |
103 |
|
|
|
104 |
|
|
$log->debug("dbf row = ", sub { dump( $row ) }); |
105 |
|
|
|
106 |
|
|
my $record = { |
107 |
|
|
'001' => [ $mfn ], |
108 |
|
|
}; |
109 |
|
|
|
110 |
|
|
$self->{_rows}->{ $mfn } = $record; |
111 |
|
|
$log->debug("created row $mfn ", dump( $record )); |
112 |
|
|
} |
113 |
|
|
|
114 |
|
|
$self->{size} = $size; |
115 |
|
|
|
116 |
|
|
$self ? return $self : return undef; |
117 |
|
|
} |
118 |
|
|
|
119 |
|
|
=head2 fetch_rec |
120 |
|
|
|
121 |
|
|
Return record with ID C<$mfn> from database |
122 |
|
|
|
123 |
|
|
my $rec = $ll_db->fetch_rec( $mfn, $filter_coderef ); |
124 |
|
|
|
125 |
|
|
=cut |
126 |
|
|
|
127 |
|
|
sub fetch_rec { |
128 |
|
|
my $self = shift; |
129 |
|
|
|
130 |
|
|
my ($mfn, $filter_coderef) = @_; |
131 |
|
|
|
132 |
|
|
my $rec = $self->_to_hash( |
133 |
|
|
mfn => $mfn, |
134 |
|
|
row => $self->{_rows}->{$mfn}, |
135 |
|
|
hash_filter => $filter_coderef, |
136 |
|
|
); |
137 |
|
|
|
138 |
|
|
my $log = $self->_get_logger(); |
139 |
|
|
$log->debug("fetch_rec($mfn) = ", dump($rec)); |
140 |
|
|
|
141 |
|
|
return $rec; |
142 |
|
|
} |
143 |
|
|
|
144 |
|
|
=head2 size |
145 |
|
|
|
146 |
|
|
Return number of records in database |
147 |
|
|
|
148 |
|
|
my $size = $ll_db->size; |
149 |
|
|
|
150 |
|
|
=cut |
151 |
|
|
|
152 |
|
|
sub size { |
153 |
|
|
my $self = shift; |
154 |
|
|
return $self->{size}; |
155 |
|
|
} |
156 |
|
|
|
157 |
|
|
=head2 _to_hash |
158 |
|
|
|
159 |
|
|
Return hash from row. Taken from L<Biblio::Isis> |
160 |
|
|
|
161 |
|
|
my $rec = $ll_db->_to_hash( |
162 |
|
|
mfn => $mfn; |
163 |
|
|
$row |
164 |
|
|
); |
165 |
|
|
|
166 |
|
|
=cut |
167 |
|
|
|
168 |
|
|
sub _to_hash { |
169 |
|
|
my $self = shift; |
170 |
|
|
|
171 |
|
|
my $arg = {@_}; |
172 |
|
|
|
173 |
|
|
my $log = $self->_get_logger(); |
174 |
|
|
|
175 |
|
|
my $hash_filter = $arg->{hash_filter}; |
176 |
|
|
my $mfn = $arg->{mfn} || $log->logconfess("need mfn in arguments"); |
177 |
|
|
my $row = $arg->{row} || $log->logconfess("need row in arguments"); |
178 |
|
|
|
179 |
|
|
# init record to include MFN as field 000 |
180 |
|
|
my $rec = { '000' => [ $mfn ] }; |
181 |
|
|
|
182 |
|
|
foreach my $f_nr (keys %{$row}) { |
183 |
|
|
foreach my $l (@{$row->{$f_nr}}) { |
184 |
|
|
|
185 |
|
|
# filter output |
186 |
|
|
$l = $hash_filter->($l, $f_nr) if ($hash_filter); |
187 |
|
|
next unless defined($l); |
188 |
|
|
|
189 |
|
|
my $val; |
190 |
|
|
my $r_sf; # repeatable subfields in this record |
191 |
|
|
|
192 |
|
|
# has subfields? |
193 |
|
|
if ($l =~ m/\^/) { |
194 |
|
|
foreach my $t (split(/\^/,$l)) { |
195 |
|
|
next if (! $t); |
196 |
|
|
my ($sf,$v) = (substr($t,0,1), substr($t,1)); |
197 |
|
|
next unless (defined($v) && $v ne ''); |
198 |
|
|
|
199 |
|
|
if (ref( $val->{$sf} ) eq 'ARRAY') { |
200 |
|
|
|
201 |
|
|
push @{ $val->{$sf} }, $v; |
202 |
|
|
|
203 |
|
|
# record repeatable subfield it it's offset |
204 |
|
|
push @{ $val->{subfields} }, ( $sf, $#{ $val->{$sf} } ); |
205 |
|
|
$r_sf->{$sf}++; |
206 |
|
|
|
207 |
|
|
} elsif (defined( $val->{$sf} )) { |
208 |
|
|
|
209 |
|
|
# convert scalar field to array |
210 |
|
|
$val->{$sf} = [ $val->{$sf}, $v ]; |
211 |
|
|
|
212 |
|
|
push @{ $val->{subfields} }, ( $sf, 1 ); |
213 |
|
|
$r_sf->{$sf}++; |
214 |
|
|
|
215 |
|
|
} else { |
216 |
|
|
$val->{$sf} = $v; |
217 |
|
|
push @{ $val->{subfields} }, ( $sf, 0 ); |
218 |
|
|
} |
219 |
|
|
} |
220 |
|
|
} else { |
221 |
|
|
$val = $l; |
222 |
|
|
} |
223 |
|
|
|
224 |
|
|
push @{$rec->{$f_nr}}, $val; |
225 |
|
|
} |
226 |
|
|
} |
227 |
|
|
|
228 |
|
|
return $rec; |
229 |
|
|
} |
230 |
|
|
|
231 |
|
|
=head1 AUTHOR |
232 |
|
|
|
233 |
|
|
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
234 |
|
|
|
235 |
|
|
=head1 COPYRIGHT & LICENSE |
236 |
|
|
|
237 |
|
|
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
238 |
|
|
|
239 |
|
|
This program is free software; you can redistribute it and/or modify it |
240 |
|
|
under the same terms as Perl itself. |
241 |
|
|
|
242 |
|
|
=cut |
243 |
|
|
|
244 |
|
|
1; # End of WebPAC::Input::DBF |