/[webpac]/trunk2/lib/WebPAC.pm
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revision 366 by dpavlin, Thu Jun 17 01:44:25 2004 UTC revision 555 by dpavlin, Fri Oct 29 22:09:04 2004 UTC
# Line 1  Line 1 
1  package WebPAC;  package WebPAC;
2    
3    use warnings;
4    use strict;
5    
6  use Carp;  use Carp;
7  use Text::Iconv;  use Text::Iconv;
8  use Config::IniFiles;  use Config::IniFiles;
9  use XML::Simple;  use XML::Simple;
10    use Template;
11    use Log::Log4perl qw(get_logger :levels);
12    use Time::HiRes qw(time);
13    
14  use Data::Dumper;  use Data::Dumper;
15    
16    #my $LOOKUP_REGEX = '\[[^\[\]]+\]';
17    #my $LOOKUP_REGEX_SAVE = '\[([^\[\]]+)\]';
18    my $LOOKUP_REGEX = 'lookup{[^\{\}]+}';
19    my $LOOKUP_REGEX_SAVE = 'lookup{([^\{\}]+)}';
20    
21  =head1 NAME  =head1 NAME
22    
23  WebPAC - base class for WebPAC  WebPAC - base class for WebPAC
# Line 19  This module implements methods used by W Line 30  This module implements methods used by W
30    
31  =head2 new  =head2 new
32    
33  This will create new instance of WebPAC using configuration specified by C<config_file>.  Create new instance of WebPAC using configuration specified by C<config_file>.
34    
35   my $webpac = new WebPAC(   my $webpac = new WebPAC(
36          config_file => 'name.conf',          config_file => 'name.conf',
37          [code_page => 'ISO-8859-2',]          code_page => 'ISO-8859-2',
38            low_mem => 1,
39            filter => {
40                    'lower' => sub { lc($_[0]) },
41            },
42   );   );
43    
44  Default C<code_page> is C<ISO-8859-2>.  Default C<code_page> is C<ISO-8859-2>.
45    
46  It will also read configuration files  Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).
47    
48    There is optinal parametar C<filter> which specify different filters which
49    can be applied using C<filter{name}> notation.
50    
51    This method will also read configuration files
52  C<global.conf> (used by indexer and Web font-end)  C<global.conf> (used by indexer and Web font-end)
53  and configuration file specified by C<config_file>  and configuration file specified by C<config_file>
54  which describes databases to be indexed.  which describes databases to be indexed.
# Line 49  sub new { Line 69  sub new {
69          my $self = {@_};          my $self = {@_};
70          bless($self, $class);          bless($self, $class);
71    
72            $self->{'start_t'} = time();
73    
74            my $log_file = $self->{'log'} || "log.conf";
75            Log::Log4perl->init($log_file);
76    
77            my $log = $self->_get_logger();
78    
79          # fill in default values          # fill in default values
80          # output codepage          # output codepage
81          $self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'});          $self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'});
# Line 56  sub new { Line 83  sub new {
83          #          #
84          # read global.conf          # read global.conf
85          #          #
86            $log->debug("read 'global.conf'");
87    
88          $self->{global_config_file} = new Config::IniFiles( -file => 'global.conf' ) || croak "can't open 'global.conf'";          my $config = new Config::IniFiles( -file => 'global.conf' ) || $log->logcroak("can't open 'global.conf'");
89    
90          # read global config parametars          # read global config parametars
91          foreach my $var (qw(          foreach my $var (qw(
# Line 67  sub new { Line 95  sub new {
95                          dbi_passwd                          dbi_passwd
96                          show_progress                          show_progress
97                          my_unac_filter                          my_unac_filter
98                            output_template
99                  )) {                  )) {
100                  $self->{global_config}->{$var} = $self->{global_config_file}->val('global', $var);                  $self->{'global_config'}->{$var} = $config->val('global', $var);
101          }          }
102    
103          #          #
104          # read indexer config file          # read indexer config file
105          #          #
106    
107          $self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || croak "can't open '$self->{config_file}'";          $self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || $log->logcroak("can't open '",$self->{config_file},"'");
108    
109            # create UTF-8 convertor for import_xml files
110          $self->{'utf2cp'} = Text::Iconv->new('UTF-8' ,$self->{'code_page'});          $self->{'utf2cp'} = Text::Iconv->new('UTF-8' ,$self->{'code_page'});
111    
112            # create Template toolkit instance
113            $self->{'tt'} = Template->new(
114                    INCLUDE_PATH => ($self->{'global_config_file'}->{'output_template'} || './output_template'),
115    #               FILTERS => {
116    #                       'foo' => \&foo_filter,
117    #               },
118                    EVAL_PERL => 1,
119            );
120    
121            # running with low_mem flag? well, use DBM::Deep then.
122            if ($self->{'low_mem'}) {
123                    $log->info("running with low_mem which impacts performance (<32 Mb memory usage)");
124    
125                    my $db_file = "data.db";
126    
127                    if (-e $db_file) {
128                            unlink $db_file or $log->logdie("can't remove '$db_file' from last run");
129                            $log->debug("removed '$db_file' from last run");
130                    }
131    
132                    require DBM::Deep;
133    
134                    my $db = new DBM::Deep $db_file;
135    
136                    $log->logdie("DBM::Deep error: $!") unless ($db);
137    
138                    if ($db->error()) {
139                            $log->logdie("can't open '$db_file' under low_mem: ",$db->error());
140                    } else {
141                            $log->debug("using file '$db_file' for DBM::Deep");
142                    }
143    
144                    $self->{'db'} = $db;
145            }
146    
147            $log->debug("filters defined: ",Dumper($self->{'filter'}));
148    
149          return $self;          return $self;
150  }  }
151    
# Line 88  Open CDS/ISIS database using OpenIsis mo Line 156  Open CDS/ISIS database using OpenIsis mo
156   $webpac->open_isis(   $webpac->open_isis(
157          filename => '/data/ISIS/ISIS',          filename => '/data/ISIS/ISIS',
158          code_page => '852',          code_page => '852',
159          limit_mfn => '500',          limit_mfn => 500,
160            start_mfn => 6000,
161          lookup => [ ... ],          lookup => [ ... ],
162   );   );
163    
164  By default, ISIS code page is assumed to be C<852>.  By default, ISIS code page is assumed to be C<852>.
165    
166    If optional parametar C<start_mfn> is set, this will be first MFN to read
167    from database (so you can skip beginning of your database if you need to).
168    
169  If optional parametar C<limit_mfn> is set, it will read just 500 records  If optional parametar C<limit_mfn> is set, it will read just 500 records
170  from database in example above.  from database in example above.
171    
 Returns number of last record read into memory (size of database, really).  
   
172  C<lookup> argument is an array of lookups to create. Each lookup must have C<key> and  C<lookup> argument is an array of lookups to create. Each lookup must have C<key> and
173  C<val>. Optional parametar C<eval> is perl code to evaluate before storing  C<val>. Optional parametar C<eval> is perl code to evaluate before storing
174  value in index.  value in index.
# Line 110  value in index. Line 180  value in index.
180      'val' => 'v900' },      'val' => 'v900' },
181   ]   ]
182    
183    Returns number of last record read into memory (size of database, really).
184    
185  =cut  =cut
186    
187  sub open_isis {  sub open_isis {
188          my $self = shift;          my $self = shift;
189          my $arg = {@_};          my $arg = {@_};
190    
191          croak "need filename" if (! $arg->{'filename'});          my $log = $self->_get_logger();
192    
193            $log->logcroak("need filename") if (! $arg->{'filename'});
194          my $code_page = $arg->{'code_page'} || '852';          my $code_page = $arg->{'code_page'} || '852';
195    
196            $log->logdie("can't find database ",$arg->{'filename'}) unless (glob($arg->{'filename'}.'.*'));
197    
198            # store data in object
199            $self->{'isis_filename'} = $arg->{'filename'};
200            $self->{'isis_code_page'} = $code_page;
201    
202          use OpenIsis;          use OpenIsis;
203    
204          #$self->{'isis_code_page'} = $code_page;          #$self->{'isis_code_page'} = $code_page;
# Line 126  sub open_isis { Line 206  sub open_isis {
206          # create Text::Iconv object          # create Text::Iconv object
207          my $cp = Text::Iconv->new($code_page,$self->{'code_page'});          my $cp = Text::Iconv->new($code_page,$self->{'code_page'});
208    
209          print STDERR "reading ISIS database '",$arg->{'filename'},"'\n" if ($self->{'debug'});          $log->info("reading ISIS database '",$arg->{'filename'},"'");
210            $log->debug("isis code page: $code_page");
211    
212          my $isis_db = OpenIsis::open($arg->{'filename'});          my $isis_db = OpenIsis::open($arg->{'filename'});
213    
214          my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1;          my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1;
215            my $startmfn = 1;
216    
217          $maxmfn = $self->{limit_mfn} if ($self->{limit_mfn});          if (my $s = $self->{'start_mfn'}) {
218                    $log->info("skipping to MFN $s");
219                    $startmfn = $s;
220            } else {
221                    $self->{'start_mfn'} = $startmfn;
222            }
223    
224            $maxmfn = $startmfn + $self->{limit_mfn} if ($self->{limit_mfn});
225    
226          print STDERR "processing $maxmfn records...\n" if ($self->{'debug'});          $log->info("processing ",($maxmfn-$startmfn)." records...");
227    
228          # read database          # read database
229          for (my $mfn = 1; $mfn <= $maxmfn; $mfn++) {          for (my $mfn = $startmfn; $mfn <= $maxmfn; $mfn++) {
230    
231    
232                    $log->debug("mfn: $mfn\n");
233    
234                    my $rec;
235    
236                  # read record                  # read record
237                  my $row = OpenIsis::read( $isis_db, $mfn );                  my $row = OpenIsis::read( $isis_db, $mfn );
# Line 156  sub open_isis { Line 250  sub open_isis {
250                                                  $val = $l;                                                  $val = $l;
251                                          }                                          }
252    
253                                          push @{$self->{'data'}->{$mfn}->{$k}}, $val;                                          push @{$rec->{$k}}, $val;
254                                  }                                  }
255                            } else {
256                                    push @{$rec->{'000'}}, $mfn;
257                          }                          }
258    
259                  }                  }
260    
261                    $log->confess("record $mfn empty?") unless ($rec);
262    
263                    # store
264                    if ($self->{'low_mem'}) {
265                            $self->{'db'}->put($mfn, $rec);
266                    } else {
267                            $self->{'data'}->{$mfn} = $rec;
268                    }
269    
270                  # create lookup                  # create lookup
                 my $rec = $self->{'data'}->{$mfn};  
271                  $self->create_lookup($rec, @{$arg->{'lookup'}});                  $self->create_lookup($rec, @{$arg->{'lookup'}});
272    
273                    $self->progress_bar($mfn,$maxmfn);
274    
275          }          }
276    
277          $self->{'current_mfn'} = 1;          $self->{'current_mfn'} = -1;
278            $self->{'last_pcnt'} = 0;
279    
280            $log->debug("max mfn: $maxmfn");
281    
282          # store max mfn and return it.          # store max mfn and return it.
283          return $self->{'max_mfn'} = $maxmfn;          return $self->{'max_mfn'} = $maxmfn;
# Line 186  it's implemented, that is). Line 295  it's implemented, that is).
295  sub fetch_rec {  sub fetch_rec {
296          my $self = shift;          my $self = shift;
297    
298          my $mfn = $self->{'current_mfn'}++ || confess "it seems that you didn't load database!";          my $log = $self->_get_logger();
299    
300            $log->logconfess("it seems that you didn't load database!") unless ($self->{'current_mfn'});
301    
302            if ($self->{'current_mfn'} == -1) {
303                    $self->{'current_mfn'} = $self->{'start_mfn'};
304            } else {
305                    $self->{'current_mfn'}++;
306            }
307    
308            my $mfn = $self->{'current_mfn'};
309    
310          if ($mfn > $self->{'max_mfn'}) {          if ($mfn > $self->{'max_mfn'}) {
311                  $self->{'current_mfn'} = $self->{'max_mfn'};                  $self->{'current_mfn'} = $self->{'max_mfn'};
312                    $log->debug("at EOF");
313                  return;                  return;
314          }          }
315    
316          return $self->{'data'}->{$mfn};          $self->progress_bar($mfn,$self->{'max_mfn'});
317    
318            if ($self->{'low_mem'}) {
319                    return $self->{'db'}->get($mfn);
320            } else {
321                    return $self->{'data'}->{$mfn};
322            }
323    }
324    
325    =head2 mfn
326    
327    Returns current record number (MFN).
328    
329     print $webpac->mfn;
330    
331    =cut
332    
333    sub mfn {
334            my $self = shift;
335            return $self->{'current_mfn'};
336    }
337    
338    =head2 progress_bar
339    
340    Draw progress bar on STDERR.
341    
342     $webpac->progress_bar($current, $max);
343    
344    =cut
345    
346    sub progress_bar {
347            my $self = shift;
348    
349            my ($curr,$max) = @_;
350    
351            my $log = $self->_get_logger();
352    
353            $log->logconfess("no current value!") if (! $curr);
354            $log->logconfess("no maximum value!") if (! $max);
355    
356            if ($curr > $max) {
357                    $max = $curr;
358                    $log->debug("overflow to $curr");
359            }
360    
361            $self->{'last_pcnt'} ||= 1;
362    
363            my $p = int($curr * 100 / $max) || 1;
364    
365            # reset on re-run
366            if ($p < $self->{'last_pcnt'}) {
367                    $self->{'last_pcnt'} = $p;
368                    $self->{'last_t'} = time();
369                    $self->{'last_curr'} = undef;
370            }
371    
372            $self->{'last_t'} ||= time();
373    
374            if ($p != $self->{'last_pcnt'}) {
375    
376                    my $last_curr = $self->{'last_curr'} || $curr;
377                    my $t = time();
378                    my $rate = ($curr - $last_curr) / (($t - $self->{'last_t'} || 1));
379                    my $eta = ($max-$curr) / ($rate || 1);
380                    printf STDERR ("%5d [%-38s] %-5d %0.1f/s %s\r",$curr,"=" x ($p/3)."$p%>", $max, $rate, $self->fmt_time($eta));
381                    $self->{'last_pcnt'} = $p;
382                    $self->{'last_t'} = time();
383                    $self->{'last_curr'} = $curr;
384            }
385            print STDERR "\n" if ($p == 100);
386    }
387    
388    =head2 fmt_time
389    
390    Format time (in seconds) for display.
391    
392     print $webpac->fmt_time(time());
393    
394    This method is called by L<progress_bar> to display remaining time.
395    
396    =cut
397    
398    sub fmt_time {
399            my $self = shift;
400    
401            my $t = shift || 0;
402            my $out = "";
403    
404            my ($ss,$mm,$hh) = gmtime($t);
405            $out .= "${hh}h" if ($hh);
406            $out .= sprintf("%02d:%02d", $mm,$ss);
407            $out .= "  " if ($hh == 0);
408            return $out;
409  }  }
410    
411  =head2 open_import_xml  =head2 open_import_xml
# Line 207  Read file from C<import_xml/> directory Line 419  Read file from C<import_xml/> directory
419  sub open_import_xml {  sub open_import_xml {
420          my $self = shift;          my $self = shift;
421    
422            my $log = $self->_get_logger();
423    
424          my $arg = {@_};          my $arg = {@_};
425          confess "need type to load file from import_xml/" if (! $arg->{'type'});          $log->logconfess("need type to load file from import_xml/") if (! $arg->{'type'});
426    
427          $self->{'type'} = $arg->{'type'};          $self->{'type'} = $arg->{'type'};
428    
# Line 217  sub open_import_xml { Line 431  sub open_import_xml {
431    
432          $self->{'tag'} = $type2tag{$type_base};          $self->{'tag'} = $type2tag{$type_base};
433    
434          print STDERR "using type ",$self->{'type'}," tag ",$self->{'tag'},"\n" if ($self->{'debug'});          $log->info("using type '",$self->{'type'},"' tag <",$self->{'tag'},">");
435    
436          my $f = "./import_xml/".$self->{'type'}.".xml";          my $f = "./import_xml/".$self->{'type'}.".xml";
437          confess "import_xml file '$f' doesn't exist!" if (! -e "$f");          $log->logconfess("import_xml file '$f' doesn't exist!") if (! -e "$f");
438    
439          print STDERR "reading '$f'\n" if ($self->{'debug'});          $log->info("reading '$f'");
440    
441            $self->{'import_xml_file'} = $f;
442    
443          $self->{'import_xml'} = XMLin($f,          $self->{'import_xml'} = XMLin($f,
444                  ForceArray => [ $self->{'tag'}, 'config', 'format' ],                  ForceArray => [ $self->{'tag'}, 'config', 'format' ],
                 ForceContent => 1  
445          );          );
446    
447          print Dumper($self->{'import_xml'});          $log->debug("import xml is ",sub { Dumper($self->{'import_xml'}) });
448    
449  }  }
450    
# Line 237  sub open_import_xml { Line 452  sub open_import_xml {
452    
453  Create lookup from record using lookup definition.  Create lookup from record using lookup definition.
454    
455     $self->create_lookup($rec, @lookups);
456    
457    Called internally by C<open_*> methods.
458    
459  =cut  =cut
460    
461  sub create_lookup {  sub create_lookup {
462          my $self = shift;          my $self = shift;
463    
464          my $rec = shift || confess "need record to create lookup";          my $log = $self->_get_logger();
465          confess("need HASH as first argument!") if ($rec !~ /HASH/o);  
466            my $rec = shift || $log->logconfess("need record to create lookup");
467            $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
468    
469          foreach my $i (@_) {          foreach my $i (@_) {
470                  if ($i->{'eval'}) {                  $log->logconfess("need key") unless defined($i->{'key'});
471                          my $eval = $self->fill_in($rec,$i->{'eval'});                  $log->logconfess("need val") unless defined($i->{'val'});
472                          my $key = $self->fill_in($rec,$i->{'key'});  
473                          my @val = $self->fill_in($rec,$i->{'val'});                  if (defined($i->{'eval'})) {
474                          if ($key && @val && eval $eval) {                          # eval first, so we can skip fill_in for key and val
475                            my $eval = $self->fill_in($rec,$i->{'eval'}) || next;
476                            if ($self->_eval($eval)) {
477                                    my $key = $self->fill_in($rec,$i->{'key'}) || next;
478                                    my @val = $self->fill_in($rec,$i->{'val'}) || next;
479                                    $log->debug("stored $key = ",sub { join(" | ",@val) });
480                                  push @{$self->{'lookup'}->{$key}}, @val;                                  push @{$self->{'lookup'}->{$key}}, @val;
481                          }                          }
482                  } else {                  } else {
483                          my $key = $self->fill_in($rec,$i->{'key'});                          my $key = $self->fill_in($rec,$i->{'key'}) || next;
484                          my @val = $self->fill_in($rec,$i->{'val'});                          my @val = $self->fill_in($rec,$i->{'val'}) || next;
485                          if ($key && @val) {                          $log->debug("stored $key = ",sub { join(" | ",@val) });
486                                  push @{$self->{'lookup'}->{$key}}, @val;                          push @{$self->{'lookup'}->{$key}}, @val;
                         }  
487                  }                  }
488          }          }
489  }  }
# Line 267  sub create_lookup { Line 492  sub create_lookup {
492    
493  Returns value from record.  Returns value from record.
494    
495   $self->get_data(\$rec,$f,$sf,$i,\$found);   my $text = $self->get_data(\$rec,$f,$sf,$i,\$found);
496    
497  Arguments are:  Arguments are:
498  record reference C<$rec>,  record reference C<$rec>,
# Line 275  field C<$f>, Line 500  field C<$f>,
500  optional subfiled C<$sf>,  optional subfiled C<$sf>,
501  index for repeatable values C<$i>.  index for repeatable values C<$i>.
502    
503  Optinal variable C<$found> will be incremeted if thre  Optinal variable C<$found> will be incremeted if there
504  is field.  is field.
505    
506  Returns value or empty string.  Returns value or empty string.
# Line 286  sub get_data { Line 511  sub get_data {
511          my $self = shift;          my $self = shift;
512    
513          my ($rec,$f,$sf,$i,$found) = @_;          my ($rec,$f,$sf,$i,$found) = @_;
514    
515          if ($$rec->{$f}) {          if ($$rec->{$f}) {
516                    return '' if (! $$rec->{$f}->[$i]);
517                    no strict 'refs';
518                  if ($sf && $$rec->{$f}->[$i]->{$sf}) {                  if ($sf && $$rec->{$f}->[$i]->{$sf}) {
519                          $$found++ if (defined($$found));                          $$found++ if (defined($$found));
520                          return $$rec->{$f}->[$i]->{$sf};                          return $$rec->{$f}->[$i]->{$sf};
# Line 315  Workhourse of all: takes record from in- Line 543  Workhourse of all: takes record from in-
543  strings with placeholders and returns string or array of with substituted  strings with placeholders and returns string or array of with substituted
544  values from record.  values from record.
545    
546   $webpac->fill_in($rec,'v250^a');   my $text = $webpac->fill_in($rec,'v250^a');
547    
548  Optional argument is ordinal number for repeatable fields. By default,  Optional argument is ordinal number for repeatable fields. By default,
549  it's assume to be first repeatable field (fields are perl array, so first  it's assume to be first repeatable field (fields are perl array, so first
550  element is 0).  element is 0).
551  Following example will read second value from repeatable field.  Following example will read second value from repeatable field.
552    
553   $webpac->fill_in($rec,'Title: v250^a',1);   my $text = $webpac->fill_in($rec,'Title: v250^a',1);
554    
555  This function B<does not> perform parsing of format to inteligenty skip  This function B<does not> perform parsing of format to inteligenty skip
556  delimiters before fields which aren't used.  delimiters before fields which aren't used.
557    
558    This method will automatically decode UTF-8 string to local code page
559    if needed.
560    
561  =cut  =cut
562    
563  sub fill_in {  sub fill_in {
564          my $self = shift;          my $self = shift;
565    
566          my $rec = shift || confess "need data record";          my $log = $self->_get_logger();
567          my $format = shift || confess "need format to parse";  
568            my $rec = shift || $log->logconfess("need data record");
569            my $format = shift || $log->logconfess("need format to parse");
570          # iteration (for repeatable fields)          # iteration (for repeatable fields)
571          my $i = shift || 0;          my $i = shift || 0;
572    
573            $log->logdie("infitite loop in format $format") if ($i > ($self->{'max_mfn'} || 9999));
574    
575          # FIXME remove for speedup?          # FIXME remove for speedup?
576          confess("need HASH as first argument!") if ($rec !~ /HASH/o);          $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
577    
578            if (utf8::is_utf8($format)) {
579                    $format = $self->_x($format);
580            }
581    
582          my $found = 0;          my $found = 0;
583    
# Line 346  sub fill_in { Line 585  sub fill_in {
585          # remove eval{...} from beginning          # remove eval{...} from beginning
586          $eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);          $eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);
587    
588            my $filter_name;
589            # remove filter{...} from beginning
590            $filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s);
591    
592          # do actual replacement of placeholders          # do actual replacement of placeholders
593          $format =~ s/v(\d+)(?:\^(\w))*/$self->get_data(\$rec,$1,$2,$i,\$found)/ges;          # repeatable fields
594            $format =~ s/v(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,$i,\$found)/ges;
595            # non-repeatable fields
596            $format =~ s/s(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,0,\$found)/ges;
597    
598          if ($found) {          if ($found) {
599                    $log->debug("format: $format");
600                  if ($eval_code) {                  if ($eval_code) {
601                          my $eval = $self->fill_in($rec,$eval_code,$i);                          my $eval = $self->fill_in($rec,$eval_code,$i);
602                          return if (! eval $eval);                          return if (! $self->_eval($eval));
603                    }
604                    if ($filter_name && $self->{'filter'}->{$filter_name}) {
605                            $log->debug("filter '$filter_name' for $format");
606                            $format = $self->{'filter'}->{$filter_name}->($format);
607                            return unless(defined($format));
608                            $log->debug("filter result: $format");
609                  }                  }
610                  # do we have lookups?                  # do we have lookups?
611                  if ($format =~ /\[[^\[\]]+\]/o) {                  if ($format =~ /$LOOKUP_REGEX/o) {
612                            $log->debug("format '$format' has lookup");
613                          return $self->lookup($format);                          return $self->lookup($format);
614                  } else {                  } else {
615                          return $format;                          return $format;
# Line 369  sub fill_in { Line 623  sub fill_in {
623    
624  Perform lookups on format supplied to it.  Perform lookups on format supplied to it.
625    
626   my $txt = $self->lookup('[v900]');   my $text = $self->lookup('[v900]');
627    
628  Lookups can be nested (like C<[d:[a:[v900]]]>).  Lookups can be nested (like C<[d:[a:[v900]]]>).
629    
# Line 378  Lookups can be nested (like C<[d:[a:[v90 Line 632  Lookups can be nested (like C<[d:[a:[v90
632  sub lookup {  sub lookup {
633          my $self = shift;          my $self = shift;
634    
635          my $tmp = shift || confess "need format";          my $log = $self->_get_logger();
636    
637            my $tmp = shift || $log->logconfess("need format");
638    
639          if ($tmp =~ /\[[^\[\]]+\]/o) {          if ($tmp =~ /$LOOKUP_REGEX/o) {
640                  my @in = ( $tmp );                  my @in = ( $tmp );
641  #print "##lookup $tmp\n";  
642                    $log->debug("lookup for: ",$tmp);
643    
644                  my @out;                  my @out;
645                  while (my $f = shift @in) {                  while (my $f = shift @in) {
646                          if ($f =~ /\[([^\[\]]+)\]/) {                          if ($f =~ /$LOOKUP_REGEX_SAVE/o) {
647                                  my $k = $1;                                  my $k = $1;
648                                  if ($self->{'lookup'}->{$k}) {                                  if ($self->{'lookup'}->{$k}) {
 #print "## lookup key = $k\n";  
649                                          foreach my $nv (@{$self->{'lookup'}->{$k}}) {                                          foreach my $nv (@{$self->{'lookup'}->{$k}}) {
650                                                  my $tmp2 = $f;                                                  my $tmp2 = $f;
651                                                  $tmp2 =~ s/\[$k\]/$nv/g;                                                  $tmp2 =~ s/lookup{$k}/$nv/g;
652                                                  push @in, $tmp2;                                                  push @in, $tmp2;
 #print "## lookup in => $tmp2\n";  
653                                          }                                          }
654                                  } else {                                  } else {
655                                          undef $f;                                          undef $f;
656                                  }                                  }
657                          } elsif ($f) {                          } elsif ($f) {
658                                  push @out, $f;                                  push @out, $f;
 #print "## lookup out => $f\n";  
659                          }                          }
660                  }                  }
661                    $log->logconfess("return is array and it's not expected!") unless wantarray;
662                  return @out;                  return @out;
663          } else {          } else {
664                  return $tmp;                  return $tmp;
# Line 415  Perform smart parsing of string, skippin Line 671  Perform smart parsing of string, skippin
671  defined. It can also eval code in format starting with C<eval{...}> and  defined. It can also eval code in format starting with C<eval{...}> and
672  return output or nothing depending on eval code.  return output or nothing depending on eval code.
673    
674   $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i);   my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i);
675    
676  =cut  =cut
677    
# Line 426  sub parse { Line 682  sub parse {
682    
683          return if (! $format_utf8);          return if (! $format_utf8);
684    
685          confess("need HASH as first argument!") if ($rec !~ /HASH/o);          my $log = $self->_get_logger();
686          confess("need utf2cp Text::Iconv object!") if (! $self->{'utf2cp'});  
687            $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
688            $log->logconfess("need utf2cp Text::Iconv object!") if (! $self->{'utf2cp'});
689    
690          $i = 0 if (! $i);          $i = 0 if (! $i);
691    
692          my $format = $self->{'utf2cp'}->convert($format_utf8) || confess("can't convert '$format_utf8' from UTF-8 to ",$self->{'code_page'});          my $format = $self->_x($format_utf8) || $log->logconfess("can't convert '$format_utf8' from UTF-8 to ",$self->{'code_page'});
693    
694          my @out;          my @out;
695    
696            $log->debug("format: $format");
697    
698          my $eval_code;          my $eval_code;
699          # remove eval{...} from beginning          # remove eval{...} from beginning
700          $eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);          $eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);
701    
702            my $filter_name;
703            # remove filter{...} from beginning
704            $filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s);
705    
706          my $prefix;          my $prefix;
707          my $all_found=0;          my $all_found=0;
708    
709  #print "## $format\n";          while ($format =~ s/^(.*?)(v|s)(\d+)(?:\^(\w))?//s) {
         while ($format =~ s/^(.*?)v(\d+)(?:\^(\w))*//s) {  
 #print "## [ $1 | $2 | $3 ] $format\n";  
710    
711                  my $del = $1 || '';                  my $del = $1 || '';
712                  $prefix ||= $del if ($all_found == 0);                  $prefix ||= $del if ($all_found == 0);
713    
714                    # repeatable index
715                    my $r = $i;
716                    $r = 0 if (lc("$2") eq 's');
717    
718                  my $found = 0;                  my $found = 0;
719                  my $tmp = $self->get_data(\$rec,$2,$3,$i,\$found);                  my $tmp = $self->get_data(\$rec,$3,$4,$r,\$found);
720    
721                  if ($found) {                  if ($found) {
722                          push @out, $del;                          push @out, $del;
# Line 461  sub parse { Line 727  sub parse {
727    
728          return if (! $all_found);          return if (! $all_found);
729    
730          my $out = join('',@out) . $format;          my $out = join('',@out);
731    
732            if ($out) {
733                    # add rest of format (suffix)
734                    $out .= $format;
735    
736                    # add prefix if not there
737                    $out = $prefix . $out if ($out !~ m/^\Q$prefix\E/);
738    
739                    $log->debug("result: $out");
740            }
741    
         # add prefix if not there  
         $out = $prefix . $out if ($out !~ m/^\Q$prefix\E/);  
           
742          if ($eval_code) {          if ($eval_code) {
743                  my $eval = $self->fill_in($rec,$eval_code,$i);                  my $eval = $self->fill_in($rec,$eval_code,$i) || return;
744                  return if (! eval $eval);                  $log->debug("about to eval{$eval} format: $out");
745                    return if (! $self->_eval($eval));
746            }
747            
748            if ($filter_name && $self->{'filter'}->{$filter_name}) {
749                    $log->debug("about to filter{$filter_name} format: $out");
750                    $out = $self->{'filter'}->{$filter_name}->($out);
751                    return unless(defined($out));
752                    $log->debug("filter result: $out");
753          }          }
754    
755          return $out;          return $out;
756  }  }
757    
758  =head2 data_structure  =head2 parse_to_arr
759    
760  Create in-memory data structure which represents layout from C<import_xml>.  Similar to C<parse>, but returns array of all repeatable fields
 It is used later to produce output.  
761    
762   my $ds = $webpac->data_structure($rec);   my @arr = $webpac->parse_to_arr($rec,'v250^a');
763    
764  =cut  =cut
765    
766  # private method _sort_by_order  sub parse_to_arr {
 # sort subrouting using order="" attribute  
 sub _sort_by_order {  
767          my $self = shift;          my $self = shift;
768    
769          my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} ||          my ($rec, $format_utf8) = @_;
                 $self->{'import_xml'}->{'indexer'}->{$a};  
         my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} ||  
                 $self->{'import_xml'}->{'indexer'}->{$b};  
770    
771          return $va <=> $vb;          my $log = $self->_get_logger();
772    
773            $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
774            return if (! $format_utf8);
775    
776            my $i = 0;
777            my @arr;
778    
779            while (my $v = $self->parse($rec,$format_utf8,$i++)) {
780                    push @arr, $v;
781            }
782    
783            $log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr);
784    
785            return @arr;
786  }  }
787    
788    =head2 fill_in_to_arr
789    
790    Similar to C<fill_in>, but returns array of all repeatable fields. Usable
791    for fields which have lookups, so they shouldn't be parsed but rather
792    C<fill_id>ed.
793    
794     my @arr = $webpac->fill_in_to_arr($rec,'[v900];;[v250^a]');
795    
796    =cut
797    
798    sub fill_in_to_arr {
799            my $self = shift;
800    
801            my ($rec, $format_utf8) = @_;
802    
803            my $log = $self->_get_logger();
804    
805            $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
806            return if (! $format_utf8);
807    
808            my $i = 0;
809            my @arr;
810    
811            while (my @v = $self->fill_in($rec,$format_utf8,$i++)) {
812                    push @arr, @v;
813            }
814    
815            $log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr);
816    
817            return @arr;
818    }
819    
820    =head2 sort_arr
821    
822    Sort array ignoring case and html in data
823    
824     my @sorted = $webpac->sort_arr(@unsorted);
825    
826    =cut
827    
828    sub sort_arr {
829            my $self = shift;
830    
831            my $log = $self->_get_logger();
832    
833            # FIXME add Schwartzian Transformation?
834    
835            my @sorted = sort {
836                    $a =~ s#<[^>]+/*>##;
837                    $b =~ s#<[^>]+/*>##;
838                    lc($b) cmp lc($a)
839            } @_;
840            $log->debug("sorted values: ",sub { join(", ",@sorted) });
841    
842            return @sorted;
843    }
844    
845    
846    =head2 data_structure
847    
848    Create in-memory data structure which represents layout from C<import_xml>.
849    It is used later to produce output.
850    
851     my @ds = $webpac->data_structure($rec);
852    
853    This method will also set C<$webpac->{'currnet_filename'}> if there is
854    <filename> tag in C<import_xml> and C<$webpac->{'headline'}> if there is
855    <headline> tag.
856    
857    =cut
858    
859  sub data_structure {  sub data_structure {
860          my $self = shift;          my $self = shift;
861    
862            my $log = $self->_get_logger();
863    
864          my $rec = shift;          my $rec = shift;
865          confess("need HASH as first argument!") if ($rec !~ /HASH/o);          $log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o);
866    
867            undef $self->{'currnet_filename'};
868            undef $self->{'headline'};
869    
870          my @sorted_tags;          my @sorted_tags;
871          if ($self->{tags_by_order}) {          if ($self->{tags_by_order}) {
# Line 510  sub data_structure { Line 875  sub data_structure {
875                  $self->{tags_by_order} = \@sorted_tags;                  $self->{tags_by_order} = \@sorted_tags;
876          }          }
877    
878          my $ds;          my @ds;
879    
880            $log->debug("tags: ",sub { join(", ",@sorted_tags) });
881    
882          foreach my $field (@sorted_tags) {          foreach my $field (@sorted_tags) {
883    
884                  my $row;                  my $row;
                 my $i = 0;  
885    
886  #print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}});  #print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}});
887    
888                  foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) {                  foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) {
889                            my $format = $tag->{'value'} || $tag->{'content'};
890    
891                          my $v = $self->parse($rec,$tag->{'content'},$i);                          $log->debug("format: $format");
 print "## $i:",$tag->{'content'}," = ",($v || 'null'),"\n";  
   
                         next if (!$v || $v && $v eq '');  
892    
893                          # does tag have type?                          my @v;
894                          if ($tag->{'type'}) {                          if ($format =~ /$LOOKUP_REGEX/o) {
895                                  push @{$row->{$tag->{'type'}}}, $v;                                  @v = $self->fill_in_to_arr($rec,$format);
896                          } else {                          } else {
897                                  push @{$row->{'display'}}, $v;                                  @v = $self->parse_to_arr($rec,$format);
898                                  push @{$row->{'swish'}}, $v;                          }
899                            next if (! @v);
900    
901                            if ($tag->{'sort'}) {
902                                    @v = $self->sort_arr(@v);
903                                    $log->warn("sort within tag is usually not what you want!");
904                            }
905    
906                            # use format?
907                            if ($tag->{'format_name'}) {
908                                    @v = map { $self->apply_format($tag->{'format_name'},$tag->{'format_delimiter'},$_) } @v;
909                            }
910    
911                            if ($field eq 'filename') {
912                                    $self->{'current_filename'} = join('',@v);
913                                    $log->debug("filename: ",$self->{'current_filename'});
914                            } elsif ($field eq 'headline') {
915                                    $self->{'headline'} .= join('',@v);
916                                    $log->debug("headline: ",$self->{'headline'});
917                                    next; # don't return headline in data_structure!
918                            }
919    
920                            # delimiter will join repeatable fields
921                            if ($tag->{'delimiter'}) {
922                                    @v = ( join($tag->{'delimiter'}, @v) );
923                            }
924    
925                            # default types
926                            my @types = qw(display swish);
927                            # override by type attribute
928                            @types = ( $tag->{'type'} ) if ($tag->{'type'});
929    
930                            foreach my $type (@types) {
931                                    # append to previous line?
932                                    $log->debug("type: $type ",sub { join(" ",@v) }, $row->{'append'} || 'no append');
933                                    if ($tag->{'append'}) {
934    
935                                            # I will delimit appended part with
936                                            # delimiter (or ,)
937                                            my $d = $tag->{'delimiter'};
938                                            # default delimiter
939                                            $d ||= " ";
940    
941                                            my $last = pop @{$row->{$type}};
942                                            $d = "" if (! $last);
943                                            $last .= $d . join($d, @v);
944                                            push @{$row->{$type}}, $last;
945    
946                                    } else {
947                                            push @{$row->{$type}}, @v;
948                                    }
949                            }
950    
951    
952                    }
953    
954                    if ($row) {
955                            $row->{'tag'} = $field;
956    
957                            # TODO: name_sigular, name_plural
958                            my $name = $self->{'import_xml'}->{'indexer'}->{$field}->{'name'};
959                            $row->{'name'} = $name ? $self->_x($name) : $field;
960    
961                            # post-sort all values in field
962                            if ($self->{'import_xml'}->{'indexer'}->{$field}->{'sort'}) {
963                                    $log->warn("sort at field tag not implemented");
964                          }                          }
965    
966                            push @ds, $row;
967    
968                            $log->debug("row $field: ",sub { Dumper($row) });
969                  }                  }
970    
971                  push @{$ds->{$field}}, $row if ($row);          }
972    
973            return @ds;
974    
975    }
976    
977    =head2 output
978    
979    Create output from in-memory data structure using Template Toolkit template.
980    
981    my $text = $webpac->output( template => 'text.tt', data => @ds );
982    
983    =cut
984    
985    sub output {
986            my $self = shift;
987    
988            my $args = {@_};
989    
990            my $log = $self->_get_logger();
991    
992            $log->logconfess("need template name") if (! $args->{'template'});
993            $log->logconfess("need data array") if (! $args->{'data'});
994    
995            my $out;
996    
997            $self->{'tt'}->process(
998                    $args->{'template'},
999                    $args,
1000                    \$out
1001            ) || confess $self->{'tt'}->error();
1002    
1003            return $out;
1004    }
1005    
1006    =head2 output_file
1007    
1008    Create output from in-memory data structure using Template Toolkit template
1009    to a file.
1010    
1011     $webpac->output_file(
1012            file => 'out.txt',
1013            template => 'text.tt',
1014            data => @ds
1015     );
1016    
1017    =cut
1018    
1019    sub output_file {
1020            my $self = shift;
1021    
1022            my $args = {@_};
1023    
1024            my $log = $self->_get_logger();
1025    
1026            my $file = $args->{'file'} || $log->logconfess("need file name");
1027    
1028            $log->debug("creating file ",$file);
1029    
1030            open(my $fh, ">", $file) || $log->logdie("can't open output file '$file': $!");
1031            print $fh $self->output(
1032                    template => $args->{'template'},
1033                    data => $args->{'data'},
1034            ) || $log->logdie("print: $!");
1035            close($fh) || $log->logdie("close: $!");
1036    }
1037    
1038    =head2 apply_format
1039    
1040    Apply format specified in tag with C<format_name="name"> and
1041    C<format_delimiter=";;">.
1042    
1043     my $text = $webpac->apply_format($format_name,$format_delimiter,$data);
1044    
1045    Formats can contain C<lookup{...}> if you need them.
1046    
1047    =cut
1048    
1049    sub apply_format {
1050            my $self = shift;
1051    
1052            my ($name,$delimiter,$data) = @_;
1053    
1054            my $log = $self->_get_logger();
1055    
1056            if (! $self->{'import_xml'}->{'format'}->{$name}) {
1057                    $log->warn("<format name=\"$name\"> is not defined in ",$self->{'import_xml_file'});
1058                    return $data;
1059            }
1060    
1061            $log->warn("no delimiter for format $name") if (! $delimiter);
1062    
1063            my $format = $self->_x($self->{'import_xml'}->{'format'}->{$name}->{'content'}) || $log->logdie("can't find format '$name'");
1064    
1065            my @data = split(/\Q$delimiter\E/, $data);
1066    
1067            my $out = sprintf($format, @data);
1068            $log->debug("using format $name [$format] on $data to produce: $out");
1069    
1070            if ($out =~ m/$LOOKUP_REGEX/o) {
1071                    return $self->lookup($out);
1072            } else {
1073                    return $out;
1074            }
1075    
1076    }
1077    
1078    
1079    #
1080    #
1081    #
1082    
1083    =head1 INTERNAL METHODS
1084    
1085    Here is a quick list of internal methods, mostly useful to turn debugging
1086    on them (see L<LOGGING> below for explanation).
1087    
1088    =cut
1089    
1090    =head2 _eval
1091    
1092    Internal function to eval code without C<strict 'subs'>.
1093    
1094    =cut
1095    
1096    sub _eval {
1097            my $self = shift;
1098    
1099            my $code = shift || return;
1100    
1101            my $log = $self->_get_logger();
1102    
1103            no strict 'subs';
1104            my $ret = eval $code;
1105            if ($@) {
1106                    $log->error("problem with eval code [$code]: $@");
1107          }          }
1108    
1109          print Dumper($ds);          $log->debug("eval: ",$code," [",$ret,"]");
1110    
1111            return $ret || undef;
1112    }
1113    
1114    =head2 _sort_by_order
1115    
1116    Sort xml tags data structure accoding to C<order=""> attribute.
1117    
1118    =cut
1119    
1120    sub _sort_by_order {
1121            my $self = shift;
1122    
1123            my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} ||
1124                    $self->{'import_xml'}->{'indexer'}->{$a};
1125            my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} ||
1126                    $self->{'import_xml'}->{'indexer'}->{$b};
1127    
1128            return $va <=> $vb;
1129    }
1130    
1131    =head2 _get_logger
1132    
1133    Get C<Log::Log4perl> object with a twist: domains are defined for each
1134    method
1135    
1136     my $log = $webpac->_get_logger();
1137    
1138    =cut
1139    
1140    sub _get_logger {
1141            my $self = shift;
1142    
1143            my $name = (caller(1))[3] || caller;
1144            return get_logger($name);
1145  }  }
1146    
1147    =head2 _x
1148    
1149    Convert string from UTF-8 to code page defined in C<import_xml>.
1150    
1151     my $text = $webpac->_x('utf8 text');
1152    
1153    =cut
1154    
1155    sub _x {
1156            my $self = shift;
1157            my $utf8 = shift || return;
1158    
1159            return $self->{'utf2cp'}->convert($utf8) ||
1160                    $self->_get_logger()->logwarn("can't convert '$utf8'");
1161    }
1162    
1163    #
1164    #
1165    #
1166    
1167    =head1 LOGGING
1168    
1169    Logging in WebPAC is performed by L<Log::Log4perl> with config file
1170    C<log.conf>.
1171    
1172    Methods defined above have different levels of logging, so
1173    it's descriptions will be useful to turn (mostry B<debug> logging) on
1174    or off to see why WabPAC isn't perforing as you expect it (it might even
1175    be a bug!).
1176    
1177    B<This is different from normal Log4perl behaviour>. To repeat, you can
1178    also use method names, and not only classes (which are just few)
1179    to filter logging.
1180    
1181    
1182    =head1 MEMORY USAGE
1183    
1184    C<low_mem> options is double-edged sword. If enabled, WebPAC
1185    will run on memory constraint machines (which doesn't have enough
1186    physical RAM to create memory structure for whole source database).
1187    
1188    If your machine has 512Mb or more of RAM and database is around 10000 records,
1189    memory shouldn't be an issue. If you don't have enough physical RAM, you
1190    might consider using virtual memory (if your operating system is handling it
1191    well, like on FreeBSD or Linux) instead of dropping to L<DBD::Deep> to handle
1192    parsed structure of ISIS database (this is what C<low_mem> option does).
1193    
1194    Hitting swap at end of reading source database is probably o.k. However,
1195    hitting swap before 90% will dramatically decrease performance and you will
1196    be better off with C<low_mem> and using rest of availble memory for
1197    operating system disk cache (Linux is particuallary good about this).
1198    However, every access to database record will require disk access, so
1199    generation phase will be slower 10-100 times.
1200    
1201    Parsed structures are essential - you just have option to trade RAM memory
1202    (which is fast) for disk space (which is slow). Be sure to have planty of
1203    disk space if you are using C<low_mem> and thus L<DBD::Deep>.
1204    
1205    However, when WebPAC is running on desktop machines (or laptops :-), it's
1206    highly undesireable for system to start swapping. Using C<low_mem> option can
1207    reduce WecPAC memory usage to around 64Mb for same database with lookup
1208    fields and sorted indexes which stay in RAM. Performance will suffer, but
1209    memory usage will really be minimal. It might be also more confortable to
1210    run WebPAC reniced on those machines.
1211    
1212    =cut
1213    
1214  1;  1;
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